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But the failure message actually mentions "progressive video," suggesting the fast path returned null (maybe moov wasn't found, or the codec wasn't AAC), so the code fell back to downloading the full video, and compressForWhisper failed there instead. My best guess is the video is long and large — possibly over a gigabyte — and ffmpeg.wasm hit its memory limit writing that much to MEMFS, causing a silent OOM that surfaces as a misleading error. I'm thinking through fixes: have directFinishAudio fall back to parsing the in-memory buffer with GroqMp4 directly (bypassing ffmpeg) when compression fails on MP4-like bytes, since we already have the full buffer and can handle moov-at-end that way. I'm also considering whether compressForWhisper could chunk large inputs, and why the GroqMp4 fast path failed for this particular video in the first place. The likely reason the fast path failed is that the server doesn't support range requests, so it returned a full 200 response instead of a 206, tripping the RANGE_UNSUPPORTED check inside the fetcher and causing the fast path to return null — which then triggers the full progressive download that overwhelms ffmpeg due to file size. So my fix plan is: when compressForWhisper returns null in directFinishAudio, try running GroqMp4 against the downloaded buffer using a local fetcher to extract raw ADTS AAC audio, then attempt compressForWhisper again on that much smaller extracted stream — and if that still fails, just return the raw ADTS bytes as a playable audio file. I'm starting to write the updated directFinishAudio function in hlsdl.js to implement this fallback logic. Writing fallback extraction logic... I'm double-checking the GroqMp4.open signature to confirm the URL and fetcher argument order match how I'm calling it, since the fetcher needs to return byte ranges with the correct total file size for the extraction to work properly. Since GroqMp4 only handles aac/mp3 codecs, other audio formats will legitimately fail, so I don't need extra handling there. I should also verify the GroqMp4 script is loaded in the same context as hlsdl within offscreen.html.44:o9,115:T5b4,44:o5b4,I should also fix the fast-path download function, which throws a RANGE_UNSUPPORTED error when the server responds with 200 instead of 206 for a range request — some servers ignore Range headers and just return the full body, which currently kills the fast path unnecessarily since the progressive path can handle that case. There's also a hotlink-protection concern: fetches with credentials included might get blocked without the proper Referer header, so I need to think through whether the content script or offscreen document handles that fetch. I should also make compressForWhisper more resilient — if the first ffmpeg exec throws or fails with a nonzero exit code, subsequent execs on the same instance could inherit a bad state, so I want to make sure my hlsdl fallback and retry logic properly reset things rather than reusing a corrupted process. I'm also considering whether naming the temp input file affects ffmpeg's ability to probe format for both MP4 and raw ADTS streams, though it seems fine either way. Separately, I want to double check the tail-probe logic in the MP4 reader that looks for the moov atom, since it relies on range fetches that my custom fetcher needs to handle correctly. 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GENERATING44:o9,117:T564,44:o564,I'm reconsidering the offscreen architecture—currently there's a single WebSocket handling multiplexed requests across lanes, so to boost throughput I should use a pool of multiple WebSocket connections with more lanes distributed across them, like 16 lanes over 4-8 sockets. I'm also noting that only English voices currently prefetch full content. text while Vietnamese narration renders per-cue, so I need to prefetch everything after transcription/translation and raise the cache cap from 500. For the WS pool, I'm planning to track which socket each job belongs to so that when a socket closes, only its own jobs fail rather than wiping out everything globally. Checking background.js, it looks like it just delegates synthesis calls to offscreen, so the pool changes only need to happen there — good, that simplifies things. For content.js, I'm raising the cache cap to 4000 and adding a full-narration prefetch with a concurrency pool of 24 that kicks in once translations are ready, since right now only the English path gets pre-cached. For the prefetch, I'll fire off translation requests through the existing dedupe map but throttle concurrency to around 32 to avoid flooding the message port, since firing thousands at once for large cue sets could be risky even though offscreen serializes lanes. I need to look at the full `$` function to make precise edits.44:o9,118:T619,44:o619,I'm reworking the offscreen edge socket handling to use a pool of up to six connections instead of a single socket, tracking each job by its socket reference so a closed connection only fails its own jobs, and having edgeConnect pick sockets round-robin while spawning new ones as needed. Writing pool connection logic... Refining the connection pool logic... Just retry rather than closing the socket, setting EDGE_LANES to 24. I'm checking whether background.js still has a duplicate WS implementation that's now unused, since the offscreen pool is what actually runs the synthesis. I also want to bump the cache cap in content.js from 500 to 5000 entries and make sure the translation batching stays efficient. Now I'm considering whether to make translation batching run multiple concurrent batches instead of one at a time, since that currently gates how fast TTS narration can render after transcription -- the goal is to render full narration immediately, so launching several parallel translate batches (say up to 4) instead of draining sequentially in chunks of 40 could speed things up. Adjusting the concurrency guard... Finishing the counter logic so it only decrements when a batch was actually processed, then rescheduling if more items remain. With 24 offscreen lanes across 6 sockets, translations get prefetched and forwarded to TTS as they arrive without extra throttling needed. Blob URLs for the small mp3s will stay cached fine at that volume, and the English path already fires prefetches in parallel. Time to make the actual edits.44:o497,119:T483,I'm planning to replace the whole edge WebSocket section offscreen, breaking it into two edits: first the connection state, failAll, and connect logic, then the synth job set and lanes. I need to swap the single shared edge socket for a pool of slots so multiple connections can be tracked simultaneously, change failAll into a per-socket failure handler, and rewrite edgeConnect to pick a slot round-robin and establish a connection with clock sync and retry logic. Setting up connection handlers... I need to update the job tracking so each queued edge synthesis job stores its own websocket reference alongside the chunks, resolve, reject, and timer, since that ws variable is accessible from the outer promise scope. 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tsFirstSync(e,t){if(!e||e.length<188)return-1;const n=Math.min(e.length-1,"number"==typeof t?t:1048576);for(let t=0;t<=n;t++){if(71!==e[t])continue;const n=t+188,r=t+376;if((n>=e.length||71===e[n])&&(r>=e.length||71===e[r]))return t}return-1}function tsSanitizeSegment(e){const t=188;if(!e||e.length{for(let r=n+1;r+t=a+t)){if(0===i&&s){let t=l+e[l]+1;const n=t+3+((15&e[t+1])<<8|e[t+2])-4;let r=t+8;for(;r+4<=n;){const t=e[r]<<8|e[r+1],n=(31&e[r+2])<<8|e[r+3];if(0!==t){o=n;break}r+=4}continue}if(o>0&&i===o&&s){let t=l+e[l]+1;const n=t+3+((15&e[t+1])<<8|e[t+2])-4;let o=t+12+((15&e[t+10])<<8|e[t+11]);for(;o+5<=n;){const t=e[o],n=(31&e[o+1])<<8|e[o+2],a=(15&e[o+3])<<8|e[o+4];if(15===t||3===t||4===t){r=n;break}o+=5+a}if(r>0)break}}}const a=[];for(let o=0;o+t<=e.length;o+=t){if(71!==e[o]){const e=n(o);if(e<0)break;o=e-t;continue}const i=(31&e[o+1])<<8|e[o+2];if(r>0&&i!==r)continue;const s=!!(64&e[o+1]);let l=o+4;if(!!(32&e[o+3])&&(l+=1+e[l]),!(l>=o+t)){if(s&&0===e[l]&&0===e[l+1]&&1===e[l+2]){const t=e[l+3];if(r<0&&!(t>=192&&t<=223))continue;l+=9+e[l+8]}l7&&255===i[0]&&240==(246&i[1]),l=i.length>4&&255===i[0]&&!(224&~i[1]),c=73===i[0]&&68===i[1]&&51===i[2];if(!s&&!l&&!c){for(let e=0;ee&&a=t)break}o.length&&(s=o,downloadHls.lastOffset=i||0)}else downloadHls.lastOffset=0;const l=s.length,c=[];a.initUrl&&c.push(await fetchSegment(a.initUrl));const u=new Array(l);let d=0,f=0;await Promise.all(Array.from({length:Math.min(16,l)},async function(){for(;;){const e=f++;if(e>=l)return;let n=null;for(let t=0;t<=3;t++)try{u[e]=await fetchSegment(s[e].url),n=null;break}catch(e){n=e,t<3&&await new Promise(e=>setTimeout(e,500*(t+1)))}if(n)throw n;d++,progress(t,{type:"PREFETCH_PROGRESS",pct:Math.floor(d/l*100),loaded:d,total:l,unit:"segments"})}}));for(const e of u)e&&c.push(tsSanitizeSegment(e));const h=concatBytes(c);if(h.length<2048)throw new Error("HLS segments returned almost no data");if(tsFirstSync(h,8192)>=0){const e=demuxTsAudio(h);if(e&&e.length>2048)return e;throw new Error("Could not extract audio from the MPEG-TS stream")}return h}async function downloadAudio(e,t){const n=normalizeStreamUrl(e);let r=0,o=!1;const a=isGoogleVideo(n);if(a){if(r=gvClen(n),!r)try{const g=await fetch(withRangeParam(n,0,0),{credentials:"omit",signal:AbortSignal.timeout(15e3)}),p=(g.headers.get("Content-Range")||"").match(/\/(\d+)/);p&&(r=parseInt(p[1],10));try{g.body&&g.body.cancel()}catch{}}catch{}o=r>0}else try{const y=await fetch(n,{headers:{Range:"bytes=0-0"},credentials:"omit",signal:AbortSignal.timeout(15e3)});if(206===y.status){o=!0;const b=(y.headers.get("Content-Range")||"").match(/\/(\d+)/);b&&(r=parseInt(b[1],10))}else y.ok&&(r=parseInt(y.headers.get("Content-Length")||"0",10)||0);try{y.body&&y.body.cancel()}catch{}}catch{}if(r>419430400)throw new Error("Media is too large to transcribe");let i=0,s=-1;const l=e=>{const n=e>0?Math.min(100,Math.floor(i/e*100)):-1;n!==s&&(s=n,progress(t,{type:"PREFETCH_PROGRESS",pct:n,loaded:i,total:e}))};if(o&&r>0){const w=new Uint8Array(r),E=Math.ceil(r/8388608);let T=0;async function c(e){const t=8388608*e,o=Math.min(t+8388608-1,r-1);let s=null;for(let e=0;e<=3;e++){let c=0;try{const e=a?await fetch(withRangeParam(n,t,o),{credentials:"omit",signal:AbortSignal.timeout(12e4)}):await fetch(n,{headers:{Range:`bytes=${t}-${o}`},credentials:"omit",signal:AbortSignal.timeout(12e4)});if(!e.ok&&206!==e.status)throw new Error(`HTTP ${e.status}`);let s=t;const u=e.body.getReader();for(;;){const{done:e,value:t}=await u.read();if(e)break;const n=o+1-s,a=t.length>n?t.subarray(0,n):t;if(w.set(a,s),s+=a.length,c+=a.length,i+=a.length,l(r),s>o){try{u.cancel()}catch{}break}}if(s<=t)throw new Error("empty chunk");return}catch(t){s=t,i-=c,e<3&&await new Promise(t=>setTimeout(t,500*(e+1)))}}throw new Error(`Audio chunk ${e+1}/${E} failed: ${s&&s.message}`)}if(await Promise.all(Array.from({length:Math.min(16,E)},async function(){for(;;){const e=T++;if(e>=E)return;await c(e)}})),w.length<2048)throw new Error("Audio fetch returned almost no data");return w}const u=await fetch(n,{credentials:"omit",signal:AbortSignal.timeout(24e4)});if(!u.ok)throw new Error(`Audio fetch failed: HTTP ${u.status}`);const d=r||parseInt(u.headers.get("Content-Length")||"0",10)||0,f=[],h=u.body.getReader();for(;;){const{done:S,value:A}=await h.read();if(S)break;if(f.push(A),i+=A.length,l(d),i>=419430400){try{h.cancel()}catch{}break}}const m=concatBytes(f);if(m.length<2048)throw new Error("Audio fetch returned almost no data");return m}const AAC_SAMPLE_RATES=[96e3,88200,64e3,48e3,44100,32e3,24e3,22050,16e3,12e3,11025,8e3,7350];function b32(e,t){return(e[t]<<24|e[t+1]<<16|e[t+2]<<8|e[t+3])>>>0}function boxType(e,t){return String.fromCharCode(e[t]||0,e[t+1]||0,e[t+2]||0,e[t+3]||0)}function mp4Each(e,t,n,r){let o=t;for(;o+8<=n;){let t=b32(e,o);const a=boxType(e,o+4);let i=8;if(1===t){if(o+16>n)break;t=4294967296*b32(e,o+8)+b32(e,o+12),i=16}else 0===t&&(t=n-o);if(tn)break;if(!1===r(a,o+i,o+t))return;o+=t}}function mp4Find(e,t,n,r){let o=null;return mp4Each(e,t,n,(e,t,n)=>{if(e===r)return o={start:t,end:n},!1}),o}function looksIsoBmff(e){if(!e||e.length<12)return!1;let t=0;for(let n=0;n<6&&t+8<=e.length;n++){let n=b32(e,t);const r=boxType(e,t+4);if(!/^(ftyp|styp|moov|moof|mdat|free|skip|sidx|wide|pdin|emsg|uuid|mfra)$/.test(r))return!1;if("ftyp"===r||"styp"===r||"moov"===r||"moof"===r)return!0;if(1===n&&(n=4294967296*b32(e,t+8)+b32(e,t+12)),n<8)return!1;t+=n}return!1}function looksWebm(e){return e&&e.length>4&&26===e[0]&&69===e[1]&&223===e[2]&&163===e[3]}function parseAscBytes(e){if(!e||e.length<2)return null;let t,n=e[0]>>3,r=(7&e[0])<<1|e[1]>>7;if(15===r){if(e.length<5)return null;const n=(127&e[1])<<17|e[2]<<9|e[3]<<1|e[4]>>7;let o=4;for(let e=0;e>3&15}else t=e[1]>>3&15;return(n<1||n>4)&&(n=2),(!t||t>7)&&(t=2),{objectType:n,freqIdx:r,channels:t}}function findAscIn(e,t,n){for(let r=t;r=2&&o<=64&&t+o<=n){const n=parseAscBytes(e.subarray(t,t+o));if(n)return n}}return null}function adtsFor(e,t){const n=t+7;return new Uint8Array([255,241,e.objectType-1<<6|e.freqIdx<<2|e.channels>>2&1,(3&e.channels)<<6|n>>11&3,n>>3&255,(7&n)<<5|31,252])}function mp4AudioTrackInfo(e){const t=mp4Find(e,0,e.length,"moov");if(!t)return null;let n=null;if(mp4Each(e,t.start,t.end,(t,r,o)=>{if("trak"!==t||n)return;const a=mp4Find(e,r,o,"tkhd"),i=mp4Find(e,r,o,"mdia");if(!i)return;const s=mp4Find(e,i.start,i.end,"hdlr");if(!s||"soun"!==boxType(e,s.start+8))return;const l=mp4Find(e,i.start,i.end,"minf");if(!l)return;const c=mp4Find(e,l.start,l.end,"stbl");if(!c)return;const u=mp4Find(e,c.start,c.end,"stsd");if(!u)return;let d=null,f=null;if(mp4Each(e,u.start+8,u.end,(t,n,r)=>"mp4a"===t?(d="aac",f=findAscIn(e,n,r),!1):".mp3"===t||"mp3 "===t?(d="mp3",!1):("Opus"===t||"fLaC"===t||"ac-3"===t||"ec-3"===t)&&(d="Opus"===t?"opus":"other",!1)),!d)return;"aac"!==d||f||(f={objectType:2,freqIdx:4,channels:2});let h=0;if(a){const t=e[a.start];h=b32(e,a.start+(1===t?20:12))}return n={trackId:h,codec:d,cfg:f,stbl:c},!1}),!n)return null;const r=mp4Find(e,t.start,t.end,"mvex");return n.defaultSampleSize=0,r&&mp4Each(e,r.start,r.end,(t,r)=>{if("trex"!==t)return;const o=b32(e,r+4);n.trackId&&o!==n.trackId||(n.defaultSampleSize=b32(e,r+16))}),n}function mp4StblSamples(e,t){const n=mp4Find(e,t.start,t.end,"stsz"),r=mp4Find(e,t.start,t.end,"stsc"),o=mp4Find(e,t.start,t.end,"co64"),a=o||mp4Find(e,t.start,t.end,"stco");if(!n||!r||!a)return null;const i=b32(e,n.start+4),s=b32(e,n.start+8);if(!s)return null;const l=new Uint32Array(s);if(i)l.fill(i);else for(let t=0;t=f[n].first&&e+1{if("moof"!==r)return;const i=o-8;mp4Each(e,o,a,(r,o,a)=>{if("traf"!==r)return;const s=mp4Find(e,o,a,"tfhd");if(!s)return;const l=e[s.start+1]<<16|e[s.start+2]<<8|e[s.start+3],c=b32(e,s.start+4);if(t.trackId&&c!==t.trackId)return;let u=s.start+8,d=i;1&l&&(d=4294967296*b32(e,u)+b32(e,u+4),u+=8),2&l&&(u+=4),8&l&&(u+=4);let f=t.defaultSampleSize||0;16&l&&(f=b32(e,u),u+=4),32&l&&(u+=4),mp4Each(e,o,a,(t,r)=>{if("trun"!==t)return;const o=e[r+1]<<16|e[r+2]<<8|e[r+3],a=b32(e,r+4);let i=r+8,s=d;1&o&&(s=d+(0|b32(e,i)),i+=4),4&o&&(i+=4);const l=!!(256&o),c=!!(512&o),u=!!(1024&o),h=!!(2048&o);let m=s;for(let t=0;te.length)continue;const n=e.subarray(a.offset,a.offset+a.size);"aac"===t.codec&&(r.push(adtsFor(t.cfg,n.length)),o+=7),r.push(n),o+=n.length}return o<2048?null:{bytes:concatBytes(r),filename:"aac"===t.codec?"audio.aac":"audio.mp3"}}function ebmlVint(e,t,n){const r=e[t];if(void 0===r)return null;let o=1,a=128;for(;o<=8&&!(r&a);)a>>=1,o++;if(o>8)return null;let i=n?r:r&a-1;for(let n=1;nn&&(s=n),!1===r(t.value,a,s))return;o=s}}function webmAudioTrackNumber(e){let t=-1;return ebmlEach(e,0,e.length,(n,r,o)=>{if(408125543===n)return ebmlEach(e,r,o,(n,r,o)=>{if(374648427===n)return ebmlEach(e,r,o,(n,r,o)=>{if(174!==n)return;let a=-1,i=-1;return ebmlEach(e,r,o,(t,n,r)=>{if(215===t){a=0;for(let t=n;t=0?(t=a,!1):void 0}),!(t>=0)&&void 0}),!(t>=0)&&void 0}),t}function ebmlIdBytes(e){const t=[];for(;e>0;)t.unshift(255&e),e=Math.floor(e/256);return Uint8Array.from(t)}function ebmlSize8(e){const t=new Uint8Array(8);t[0]=1;for(let n=7;n>=1;n--)t[n]=e%256,e=Math.floor(e/256);return t}function ebmlElement(e,t){let n=0;for(const e of t)n+=e.length;return[ebmlIdBytes(e),ebmlSize8(n),...t]}function extractWebmAudio(e){if(!looksWebm(e))return null;const t=webmAudioTrackNumber(e);if(t<0)return null;const n=ebmlVint(e,0,!0);if(!n||440786851!==n.value)return null;const r=ebmlVint(e,n.length,!1);if(!r)return null;const o=n.length+r.length+r.value;if(o<=0||o>=e.length)return null;const a=e.subarray(0,o),i=ebmlVint(e,o,!0);if(!i||408125543!==i.value)return null;const s=ebmlVint(e,o+i.length,!1);if(!s)return null;const l=o+i.length+s.length,c=s.value===Math.pow(2,7*s.length)-1?e.length:Math.min(e.length,l+s.value);let u=null,d=null,f=1e6;const h=[];let m=l;for(;mc&&(a=c),a<0){let t=-1;for(let n=r;n{if(2807729===t){let t=0;for(let o=n;o0&&(f=t)}});else if(374648427!==n.value||d){if(524531317===n.value){let n=r,o=0;const i=[];let s=0,l=!1;for(;n{if(161===t){const t=ebmlVint(e,n,!1);t&&(r=t.value)}}),r===t&&(i.push(e.subarray(n,d)),s+=d-n,l=!0)}n=d}l&&h.push({ts:o,parts:i,size:s})}}else{let n=r;for(;n{if(215===t){r=0;for(let t=n;t{const t=[...g,...p];for(const n of e)t.push(...ebmlElement(524531317,n.parts));return concatBytes([a,...ebmlElement(408125543,t)])};return{bytes:y(h),filename:"audio.webm",split:e=>{const t=[];let n=[],r=0,o=0;for(const a of h)n.length&&r+a.size>e&&(t.push({bytes:y(n),offsetSec:o,ext:"webm"}),n=[],r=0),n.length||(o=a.ts*f/1e9),n.push(a),r+=a.size;return n.length&&t.push({bytes:y(n),offsetSec:o,ext:"webm"}),t.length>1?t:null}}}const MAX_DIRECT_UPLOAD_BYTES=23068672,ELEMENTARY_PIECE_BYTES=8388608,MP3_BITRATES={3:{v1:[0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,0],v2:[0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,0]},2:{v1:[0,32,48,56,64,80,96,112,128,160,192,224,256,320,384,0],v2:[0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,0]},1:{v1:[0,32,40,48,56,64,80,96,112,128,160,192,224,256,320,0],v2:[0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,0]}},MP3_RATES=[44100,48e3,32e3,0];function id3TagLength(e,t){if(73!==e[t]||68!==e[t+1]||51!==e[t+2])return 0;if(t+10>e.length)return e.length-t;const n=e[t+5],r=(127&e[t+6])<<21|(127&e[t+7])<<14|(127&e[t+8])<<7|127&e[t+9],o=16&n?10:0;return Math.min(e.length-t,10+r+o)}function audioFrameHeader(e,t){if(t+4>e.length)return null;if(255!==e[t]||224&~e[t+1])return null;const n=e[t+1]>>1&3;if(0===n){if(t+7>e.length)return null;const n=AAC_SAMPLE_RATES[e[t+2]>>2&15];if(!n)return null;const r=(3&e[t+3])<<11|e[t+4]<<3|e[t+5]>>5&7;if(r<7)return null;return{len:r,dur:1024*(1+(3&e[t+6]))/n,kind:"aac"}}const r=e[t+1]>>3&3;if(1===r)return null;const o=e[t+2]>>4&15,a=e[t+2]>>2&3;if(0===o||15===o||3===a)return null;const i=e[t+2]>>1&1,s=3===r;let l=MP3_RATES[a];2===r?l/=2:0===r&&(l/=4);const c=MP3_BITRATES[n],u=1e3*(s?c.v1[o]:c.v2[o]);if(!u||!l)return null;if(3===n){const e=4*(Math.floor(12*u/l)+i);return e<4?null:{len:e,dur:384/l,kind:"mp3"}}const d=1!==n||s?1152:576,f=Math.floor(d/8*(u/l))+i;return f<4?null:{len:f,dur:d/l,kind:"mp3"}}function elementaryAudioKind(e){if(!e||e.length<4096)return null;let t=0;for(let n=0;n<32;n++){const n=id3TagLength(e,t);if(!n)break;t+=n}const n=Math.min(e.length-8,t+67108864);for(let r=t;re.length)break;n+=r.len,o++}if(o>=8)return t.kind;r=n>r?n-1:r}return null}function stripId3Tags(e){if(!e||e.length<16||e.length>100663296)return e;const t=[];let n=0,r=0,o=0,a=!1;const i=n=>{n>r&&(t.push(e.subarray(r,n)),o+=n-r)};for(;n10){i(n),n+=t,r=n,a=!0;continue}const o=audioFrameHeader(e,n);o&&n+o.len<=e.length?n+=o.len:n++}let s=e.length;if(s>128&&84===e[s-128]&&65===e[s-127]&&71===e[s-126]&&(s-=128,a=!0),!a)return e;if(i(s),!o)return e;const l=new Uint8Array(o);let c=0;for(const e of t)l.set(e,c),c+=e.length;return l}function splitElementaryStream(e,t,n){if(!e||e.length<4096)return null;let r=0;const o=[];let a=-1,i=0,s=0,l="mp3",c=0,u=0;const d=t=>{a>=0&&t>a&&(o.push({bytes:e.subarray(a,t),offsetSec:s,ext:l}),s+=i,u+=t-a),a=-1,i=0};for(;r+4<=e.length;){const t=id3TagLength(e,r);if(t>10){d(r),r+=t;continue}const o=audioFrameHeader(e,r);if(!o||r+o.len>e.length){let t=-1;const n=e.length-8;for(let o=r+1;o10){t=o;break}if(255!==e[o])continue;const n=audioFrameHeader(e,o);if(!n||o+n.len>e.length)continue;const r=audioFrameHeader(e,o+n.len);if(r&&r.kind===n.kind){t=o;break}}if(d(r),t<0)break;r=t;continue}a<0&&(a=r,l=o.kind),r+o.len-a>n&&d(r),a<0&&(a=r,l=o.kind),i+=o.dur,c++,r+=o.len}if(d(Math.min(r,e.length)),!o.length||c<16)return null;if(u<524288&&u<.05*e.length)return null;const f=o.filter(e=>e.bytes.length>=16384);return f.length?1===f.length&&f[0].bytes.length>23068672?null:f:null}function splitRawWindows(e,t){if(!e||e.length<=t)return null;const n=[];for(let r=0;r0){const t=Math.min(o-8,r+524288);let n=-1;for(let o=r;o10){n=o+id3TagLength(e,o);break}if(255!==e[o])continue;const t=audioFrameHeader(e,o);if(!t||o+t.len>e.length)continue;const r=audioFrameHeader(e,o+t.len);if(r&&r.kind===t.kind){n=o;break}}if(n<0)continue;a=n}o-a>16384&&n.push(e.subarray(a,o))}return n.length>1?n:null}const UPLOADABLE_EXT=/\.(flac|mp3|mp4|mpeg|mpga|m4a|ogg|oga|wav|webm)$/i;async function decodeStreamPiecewise(e,t){const n=splitElementaryStream(e,t,4194304)||(splitRawWindows(e,4194304)||[]).map(e=>({bytes:e}));if(!n||!n.length)return null;const r=[];let o=0,a=0;for(const e of n)try{const t=await decodeToMono16k(stripId3Tags(e.bytes));t&&t.length&&(r.push(t),o+=t.length)}catch{if(a++,a>8&&0===r.length)return null}if(!r.length||o<8e3)return null;const i=new Float32Array(o);let s=0;for(const e of r)i.set(e,s),s+=e.length;return i}const PLAYBACK_RATE_LADDER=[4,2,1];function mimeCandidates(e,t){const n=[],r=e=>{e&&!n.includes(e)&&n.push(e)};(/\.webm$/i.test(e)||looksWebm(t))&&(r("video/webm"),r("audio/webm")),/\.weba$/i.test(e)&&(r("audio/webm"),r("video/webm")),(/\.(mp4|m4v)$/i.test(e)||looksIsoBmff(t))&&(r("video/mp4"),r("audio/mp4")),/\.(m4a|m4s)$/i.test(e)&&(r("audio/mp4"),r("video/mp4")),/\.mp3$/i.test(e)&&r("audio/mpeg"),/\.aac$/i.test(e)&&r("audio/aac");const o=elementaryAudioKind(t);return"mp3"===o?r("audio/mpeg"):"aac"===o&&(r("audio/aac"),r("audio/mpeg")),/\.(ogg|oga|opus)$/i.test(e)&&r("audio/ogg"),/\.wav$/i.test(e)&&r("audio/wav"),r("video/mp4"),r("video/webm"),r("audio/mp4"),r("audio/webm"),r("audio/mpeg"),r(""),n}function scrubContainerStart(e){const t=Math.min(e.length,8388608),n=(t,...n)=>n.every((n,r)=>e[t+r]===n);for(let r=0;r=4&&102===e[r]&&116===e[r+1]&&121===e[r+2]&&112===e[r+3])return e.subarray(r-4);if(r>=4&&115===e[r]&&116===e[r+1]&&121===e[r+2]&&112===e[r+3])return e.subarray(r-4);if(n(r,26,69,223,163))return e.subarray(r);if(n(r,82,73,70,70))return e.subarray(r);if(n(r,79,103,103,83))return e.subarray(r);if(n(r,73,68,51))return e.subarray(r);if(n(r,102,76,97,67))return e.subarray(r);if(255===e[r]&&!(224&~e[r+1])){const t=e[r+1]>>1&3,n=e[r+2]>>4&15,o=e[r+2]>>2&3;if(0!==t&&0!==n&&15!==n&&3!==o)return e.subarray(r)}if(255===e[r]&&240==(246&e[r+1])&&(e[r+2]>>2&15)<13)return e.subarray(r)}return e}function readUmpVarint(e,t){const n=e[t];if(void 0===n)return null;let r,o=1;if(o=n<128?1:n<192?2:n<224?3:n<240?4:5,t+o>e.length)return null;if(1===o)r=n;else if(5===o)r=e[t+1]|e[t+2]<<8|e[t+3]<<16|e[t+4]<<24;else{r=n&(1<<8-o)-1;let a=0;for(let n=o-1;n>=1;n--)a=a<<8|e[t+n];r=r<<8*(o-1)|a}return{value:r>>>0,next:t+o}}function nonMediaKind(e){if(!e||e.length<8)return"an empty response";const t=(t,...n)=>n.every((n,r)=>e[t+r]===n);if(t(0,137,80,78,71))return"a PNG image";if(t(0,255,216,255))return"a JPEG image";if(t(0,71,73,70,56))return"a GIF image";if(t(0,66,77))return"a BMP image";if(t(0,82,73,70,70)&&t(8,87,69,66,80))return"a WebP image";if(t(0,31,139))return"a gzip-compressed response";if(t(0,80,75,3,4))return"a ZIP archive";if(t(0,37,80,68,70))return"a PDF file";const n=String.fromCharCode(...e.subarray(0,256)).trim();return/^<(!doctype|html|\?xml)/i.test(n)?"an HTML/XML error page":/^[{[]/.test(n)&&/["{[\]}]/.test(n)?"a JSON error response":""}function findMediaStart(e){if(!e||e.length<32)return-1;const t=Math.min(e.length-16,4194304);for(let n=1;n=4)return n-4}if(26===t&&69===e[n+1]&&223===e[n+2]&&163===e[n+3])return n;if(73===t&&68===e[n+1]&&51===e[n+2])return n;if(79===t&&103===e[n+1]&&103===e[n+2]&&83===e[n+3])return n}return-1}function describeBytes(e){const t=(t,...n)=>n.every((n,r)=>e[t+r]===n);if(t(0,137,80,78,71))return"a PNG image (thumbnail, not media)";if(t(0,255,216,255))return"a JPEG image (thumbnail, not media)";if(t(0,82,73,70,70)&&t(8,87,69,66,80))return"a WebP image (thumbnail, not media)";if(t(4,102,116,121,112))return"ISO-BMFF (ftyp)";if(t(4,115,116,121,112))return"ISO-BMFF segment (styp)";if(t(4,109,111,111,102))return"ISO-BMFF fragment (moof, no init)";if(t(0,26,69,223,163))return"WebM/Matroska (EBML)";if(t(0,31,67,182,117))return"WebM cluster (no init)";if(t(0,79,103,103,83))return"Ogg";if(t(0,73,68,51))return"MP3 (ID3)";if(t(0,31,139))return"gzip (not decompressed)";if(t(0,82,73,70,70))return"RIFF/WAV";const n=String.fromCharCode(...e.subarray(0,64)).trim();if(/^<(!doctype|html|\?xml)/i.test(n))return"an HTML/XML error page";if(/^[{[]/.test(n))return"a JSON error response";return`unrecognised data (${Array.from(e.subarray(0,8),e=>e.toString(16).padStart(2,"0")).join(" ")})`}function deframeUmp(e){const t=[];let n=0,r=0,o=0;for(;ne.length||i.value>e.length)break;o++,21===a.value&&i.value>1&&(t.push(e.subarray(s+1,l)),r+=i.value-1),n=l}if(o<4||r<65536)return null;const a=new Uint8Array(r);let i=0;for(const e of t)a.set(e,i),i+=e.length;return a}const MSE_TYPES=['video/mp4; codecs="avc1.640028,mp4a.40.2"','audio/mp4; codecs="mp4a.40.2"','audio/mp4; codecs="mp4a.40.5"','audio/mp4; codecs="opus"','video/webm; codecs="vp9,opus"','audio/webm; codecs="opus"','audio/webm; codecs="vorbis"',"audio/mpeg","audio/aac"];function alignForMse(e,t){const n=(t,...n)=>n.every((n,r)=>e[t+r]===n),r=Math.min(e.length,8388608);if(/mp4/.test(t)){for(let t=4;t{const n=setTimeout(()=>t(new Error("sourceopen timed out")),15e3);o.addEventListener("sourceopen",()=>{clearTimeout(n),e()},{once:!0})});const i=o.addSourceBuffer(n);try{i.mode="sequence"}catch{}const s=()=>new Promise((e,t)=>{const n=()=>{i.removeEventListener("error",r),e()},r=()=>{i.removeEventListener("updateend",n),t(new Error("append error"))};i.addEventListener("updateend",n,{once:!0}),i.addEventListener("error",r,{once:!0})}),l=4194304;i.appendBuffer(r.subarray(0,Math.min(l,r.length))),await s();let c=Math.min(l,r.length);if(/mpeg|aac/.test(n)&&c{if(e.readyState>=1)return void t();const r=setInterval(()=>{e.readyState>=1&&(a(),t())},100),o=setTimeout(()=>{a(),n(new Error("timed out loading metadata"))},45e3),a=()=>{clearInterval(r),clearTimeout(o)};e.addEventListener("loadedmetadata",()=>{a(),t()},{once:!0}),e.addEventListener("error",()=>{a();const t=e.error&&e.error.code;n(new Error(`media error ${t||"?"}`))},{once:!0})}),(async()=>{let t=c;for(;t1)try{i.remove(0,t),await s();continue}catch{}await new Promise(e=>setTimeout(e,1e3));continue}break}try{"open"===o.readyState&&o.endOfStream()}catch{}})(),a}async function capturePcmByPlayback(e,t,n,r){const o=[e],a=deframeUmp(e);a&&a.length>4096&&o.push(a);const i=a&&a.length>4096?a:e,s=scrubContainerStart(i);s!==i&&s.length>4096&&o.push(s);const l=elementaryAudioKind(i)?stripId3Tags(i):i;l!==i&&l.length>4096&&o.push(l);let c=null,u="",d=e;const f=[];let h=!1;const m=t=>t===e?"":t===a?"/ump":t===l?"/detagged":"/scrubbed";e:for(const e of o)for(const n of mimeCandidates(t,e)){if(u)try{URL.revokeObjectURL(u)}catch{}if(c)try{c.removeAttribute("src"),c.load()}catch{}c=document.createElement("video"),c.preload="auto",c.volume=1,c.muted=!1,c.setAttribute("playsinline",""),u=URL.createObjectURL(n?new Blob([e],{type:n}):new Blob([e])),c.src=u;try{c.load(),await new Promise((e,t)=>{const n=setTimeout(()=>t(new Error("timed out loading metadata")),45e3);c.addEventListener("loadedmetadata",()=>{clearTimeout(n),e()},{once:!0}),c.addEventListener("error",()=>{clearTimeout(n);const e=c.error&&c.error.code;t(new Error(`media error ${e||"?"}${c.error&&c.error.message?` (${c.error.message})`:""}`))},{once:!0})}),d=e,h=!0;break e}catch(t){f.push(`${n||"sniffed"}${m(e)}: ${t.message}`)}}if(!h)e:for(const e of o)for(const t of MSE_TYPES){if(u)try{URL.revokeObjectURL(u)}catch{}if(c)try{c.removeAttribute("src"),c.load()}catch{}c=document.createElement("video"),c.preload="auto",c.volume=1,c.muted=!1,c.setAttribute("playsinline","");try{u=await loadViaMse(c,e,t),d=e,h=!0;break e}catch(n){f.push(`mse ${t}${m(e)}: ${n.message}`)}}if(!h){try{URL.revokeObjectURL(u)}catch{}if(c)try{c.removeAttribute("src"),c.load()}catch{}throw new Error(`playback capture failed [bytes look like ${describeBytes(e)}] (${f.slice(-3).join("; ")||"no playable container found"})`)}let g=null,p=0,y=0,b=[],w=0;const E=[];try{g=new AudioContext;const e=g.createMediaElementSource(c),t=192e4,o=16e3/g.sampleRate,a=g.createScriptProcessor(16384,2,1);a.onaudioprocess=e=>{const n=e.inputBuffer,r=n.getChannelData(0),a=n.numberOfChannels>1?n.getChannelData(1):null,i=a?Float32Array.from(r,(e,t)=>(e+a[t])/2):r,s=Math.max(1,Math.round(i.length*o)),l=new Float32Array(s);for(let e=0;e=t;){const e=new Float32Array(t);let n=t,r=0;for(;n>0;){const t=b[0],o=Math.min(n,t.length);e.set(t.subarray(0,o),r),r+=o,n-=o,o===t.length?b.shift():b[0]=t.subarray(o)}w-=t,E.push({pcm:e,offsetSec:y/16e3}),y+=t}};const i=g.createGain();i.gain.value=0,e.connect(a),a.connect(i),i.connect(g.destination);let s=0;try{c.playbackRate=PLAYBACK_RATE_LADDER[0]}catch{}try{await g.resume()}catch{}try{await c.play()}catch(e){throw new Error(`playback capture could not start: ${e.message}`)}let l=Promise.resolve();const u=()=>{for(;E.length;){const e=E.shift();l=l.then(()=>n(e.pcm,e.offsetSec))}},d=new Promise(e=>{c.addEventListener("ended",e,{once:!0}),c.addEventListener("error",e,{once:!0})});let f=0,h=-1;for(;;){const e=await Promise.race([d.then(()=>!0),new Promise(e=>setTimeout(()=>e(!1),500))]);if(u(),r){const e=Number(c.duration);r(isFinite(e)&&e>0?Math.min(99,Math.floor(c.currentTime/e*100)):0)}if(e)break;if(p===h){if(f++,0===p&&f>=12&&s60)break}else f=0,h=p;if(c.paused&&!c.ended)try{await c.play()}catch{}}if(await new Promise(e=>setTimeout(e,300)),u(),w>0){const e=new Float32Array(w);let t=0;for(const n of b)e.set(n,t),t+=n.length;b=[];const r=y/16e3;l=l.then(()=>n(e,r))}if(await l,p<=8e3)throw new Error(`playback capture produced no audio (element played ${Math.round(c.currentTime)}s of ${Math.round(Number(c.duration)||0)}s)`);return!0}finally{(()=>{try{c.pause()}catch{}try{c.removeAttribute("src"),c.load()}catch{}try{URL.revokeObjectURL(u)}catch{}if(g)try{g.close()}catch{}})()}}async function decodeToMono16k(e){const t=new OfflineAudioContext(1,1,16e3),n=await t.decodeAudioData(e.slice().buffer);if(!n||!n.length)throw new Error("Decoded audio was empty");const r=Math.max(1,Math.round(16e3*n.duration)),o=new OfflineAudioContext(1,r,16e3),a=o.createBufferSource();a.buffer=n,a.connect(o.destination),a.start();return(await o.startRendering()).getChannelData(0)}function encodeWav(e,t){const n=new ArrayBuffer(44+2*e.length),r=new DataView(n),o=(e,t)=>{for(let n=0;nt&&(t=n)}return t<.0025}function bytesToBase64(e){let t="";for(let n=0;n{const n=new XMLHttpRequest;n.open("POST",l,!0),n.setRequestHeader("Authorization",`Bearer ${a}`),n.setRequestHeader("Content-Type",u),n.setRequestHeader("Accept","application/json"),n.timeout=24e4,n.responseType="text";let o=-1;n.upload.onprogress=e=>{if(!e.lengthComputable)return;const t=Math.min(100,Math.floor(e.loaded/e.total*100));t!==o&&(o=t,r(t))},n.upload.onload=()=>r(100),n.onload=()=>{const r=String(n.responseText||"");let o=null;try{o=JSON.parse(r)}catch{}if(n.status<200||n.status>=300||o&&!1===o.success){let e=r.slice(0,300)||n.statusText||"request rejected";o&&Array.isArray(o.errors)&&o.errors.length&&(e=o.errors.map(e=>e.message||e.code).join("; "));const a=new Error(`Cloudflare ${n.status}: ${e}`);return a.retryable=408===n.status||429===n.status||n.status>=500,void t(a)}o?e(o.result||o):t(new Error("Cloudflare returned an unreadable response"))},n.onerror=()=>{const e=new Error("Could not reach Cloudflare. Check your connection, VPN/ad blocker, then retry.");e.retryable=!0,t(e)},n.ontimeout=()=>{const e=new Error("Cloudflare request timed out — retrying");e.retryable=!0,t(e)},n.onabort=()=>t(new Error("Cloudflare request aborted")),n.send(c)})}catch(t){if(d=t,!t.retryable||2===e)throw t;await new Promise(t=>setTimeout(t,750*2**e))}throw d||new Error("Could not reach Cloudflare")}async function uploadToGroq(e,t,n,r){const o=String(n&&n.apiToken||"").trim();if(!o)throw new Error("Groq API key is missing");const a="whisper-large-v3",i=/\.wav$/i.test(t)?"audio/wav":/\.webm$/i.test(t)?"audio/webm":/\.(m4a|mp4)$/i.test(t)?"audio/mp4":/\.(mp3|mpga|mpeg)$/i.test(t)?"audio/mpeg":/\.(ogg|oga|opus)$/i.test(t)?"audio/ogg":/\.flac$/i.test(t)?"audio/flac":"audio/mpeg";let s;for(let n=0;n<3;n++)try{return await new Promise((n,s)=>{const l=new FormData;l.append("file",new Blob([e],{type:i}),t),l.append("model",a),l.append("response_format","verbose_json");const c=new XMLHttpRequest;c.open("POST",GROQ_API_URL,!0),c.setRequestHeader("Authorization",`Bearer ${o}`),c.setRequestHeader("Accept","application/json"),c.timeout=24e4,c.responseType="text";let u=-1;c.upload.onprogress=e=>{if(!e.lengthComputable)return;const t=Math.min(100,Math.floor(e.loaded/e.total*100));t!==u&&(u=t,r(t))},c.upload.onload=()=>r(100),c.onload=()=>{const e=String(c.responseText||"");let t=null;try{t=JSON.parse(e)}catch{}if(c.status<200||c.status>=300){let n=e.slice(0,300)||c.statusText||"request rejected";t&&t.error&&t.error.message&&(n=t.error.message);const r=new Error(`Groq ${c.status}: ${n}`);return r.retryable=408===c.status||429===c.status||c.status>=500,void s(r)}t?n(t):s(new Error("Groq returned an unreadable response"))},c.onerror=()=>{const e=new Error("Could not reach Groq. Check your connection, VPN/ad blocker, then retry.");e.retryable=!0,s(e)},c.ontimeout=()=>{const e=new Error("Groq request timed out — retrying");e.retryable=!0,s(e)},c.onabort=()=>s(new Error("Groq request aborted")),c.send(l)})}catch(e){if(s=e,!e.retryable||2===n)throw e;await new Promise(e=>setTimeout(e,750*2**n))}throw s||new Error("Could not reach Groq")}function wavDurationSec(e,t){return!/\.wav$/i.test(t)||e.length<=44?NaN:(e.length-44)/2/16e3}async function uploadToHuggingFace(e,t,n,r){const o=String(n&&n.apiToken||"").trim();if(!o)throw new Error("Hugging Face access token is missing");const a=n&&n.model||"openai/whisper-large-v3-turbo",i=`${HF_API_BASE}/${a}`,s=/\.wav$/i.test(t)?"audio/wav":/\.webm$/i.test(t)?"audio/webm":"application/octet-stream";let l;for(let n=0;n<3;n++)try{r(0);const a=await fetch(i,{method:"POST",headers:{Authorization:`Bearer ${o}`,"Content-Type":s,Accept:"application/json"},body:e,signal:AbortSignal.timeout(24e4)});r(100);const c=await a.text();let u=null;try{u=JSON.parse(c)}catch{}if(!a.ok){let e=u&&u.error?String(u.error):c.slice(0,300);const t=new Error(`Hugging Face ${a.status}: ${e||a.statusText}`);if(t.retryable=408===a.status||429===a.status||a.status>=500,!t.retryable||2===n)throw t;l=t,await new Promise(e=>setTimeout(e,2500*(n+1)));continue}if(!u)throw new Error("Hugging Face returned an unreadable response");if(Array.isArray(u.chunks)&&u.chunks.length&&(u.segments=u.chunks.map(e=>({start:Array.isArray(e.timestamp)?Number(e.timestamp[0]):NaN,end:Array.isArray(e.timestamp)?Number(e.timestamp[1]):NaN,text:String(e.text||"").trim()})).filter(e=>e.text&&Number.isFinite(e.start)&&Number.isFinite(e.end))),!Array.isArray(u.segments)||!u.segments.length){const n=wavDurationSec(e,t);Number.isFinite(n)&&(u.duration=n)}return u}catch(e){l=e;if(!(e.retryable||/timeout|abort|network/i.test(String(e.message)))||2===n)throw e;await new Promise(e=>setTimeout(e,1500*(n+1)))}throw l||new Error("Could not reach Hugging Face")}function 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i=8;if(1===t){if(o+16>n)break;t=4294967296*b32(e,o+8)+b32(e,o+12),i=16}else 0===t&&(t=n-o);if(tn)break;if(!1===r(a,o+i,o+t))return;o+=t}}function mp4Find(e,t,n,r){let o=null;return mp4Each(e,t,n,(e,t,n)=>{if(e===r)return o={start:t,end:n},!1}),o}function looksIsoBmff(e){if(!e||e.length<12)return!1;let t=0;for(let n=0;n<6&&t+8<=e.length;n++){let n=b32(e,t);const r=boxType(e,t+4);if(!/^(ftyp|styp|moov|moof|mdat|free|skip|sidx|wide|pdin|emsg|uuid|mfra)$/.test(r))return!1;if("ftyp"===r||"styp"===r||"moov"===r||"moof"===r)return!0;if(1===n&&(n=4294967296*b32(e,t+8)+b32(e,t+12)),n<8)return!1;t+=n}return!1}function looksWebm(e){return e&&e.length>4&&26===e[0]&&69===e[1]&&223===e[2]&&163===e[3]}function parseAscBytes(e){if(!e||e.length<2)return null;let t,n=e[0]>>3,r=(7&e[0])<<1|e[1]>>7;if(15===r){if(e.length<5)return null;const n=(127&e[1])<<17|e[2]<<9|e[3]<<1|e[4]>>7;let o=4;for(let e=0;e>3&15}else t=e[1]>>3&15;return(n<1||n>4)&&(n=2),(!t||t>7)&&(t=2),{objectType:n,freqIdx:r,channels:t}}function findAscIn(e,t,n){for(let r=t;r=2&&o<=64&&t+o<=n){const n=parseAscBytes(e.subarray(t,t+o));if(n)return n}}return null}function adtsFor(e,t){const n=t+7;return new Uint8Array([255,241,e.objectType-1<<6|e.freqIdx<<2|e.channels>>2&1,(3&e.channels)<<6|n>>11&3,n>>3&255,(7&n)<<5|31,252])}function mp4AudioTrackInfo(e){const t=mp4Find(e,0,e.length,"moov");if(!t)return null;let n=null;if(mp4Each(e,t.start,t.end,(t,r,o)=>{if("trak"!==t||n)return;const a=mp4Find(e,r,o,"tkhd"),i=mp4Find(e,r,o,"mdia");if(!i)return;const s=mp4Find(e,i.start,i.end,"hdlr");if(!s||"soun"!==boxType(e,s.start+8))return;const l=mp4Find(e,i.start,i.end,"minf");if(!l)return;const c=mp4Find(e,l.start,l.end,"stbl");if(!c)return;const u=mp4Find(e,c.start,c.end,"stsd");if(!u)return;let d=null,f=null;if(mp4Each(e,u.start+8,u.end,(t,n,r)=>"mp4a"===t?(d="aac",f=findAscIn(e,n,r),!1):".mp3"===t||"mp3 "===t?(d="mp3",!1):("Opus"===t||"fLaC"===t||"ac-3"===t||"ec-3"===t)&&(d="Opus"===t?"opus":"other",!1)),!d)return;"aac"!==d||f||(f={objectType:2,freqIdx:4,channels:2});let h=0;if(a){const t=e[a.start];h=b32(e,a.start+(1===t?20:12))}return n={trackId:h,codec:d,cfg:f,stbl:c},!1}),!n)return null;const r=mp4Find(e,t.start,t.end,"mvex");return n.defaultSampleSize=0,r&&mp4Each(e,r.start,r.end,(t,r)=>{if("trex"!==t)return;const o=b32(e,r+4);n.trackId&&o!==n.trackId||(n.defaultSampleSize=b32(e,r+16))}),n}function mp4StblSamples(e,t){const n=mp4Find(e,t.start,t.end,"stsz"),r=mp4Find(e,t.start,t.end,"stsc"),o=mp4Find(e,t.start,t.end,"co64"),a=o||mp4Find(e,t.start,t.end,"stco");if(!n||!r||!a)return null;const i=b32(e,n.start+4),s=b32(e,n.start+8);if(!s)return null;const l=new Uint32Array(s);if(i)l.fill(i);else for(let t=0;t=f[n].first&&e+1{if("moof"!==r)return;const i=o-8;mp4Each(e,o,a,(r,o,a)=>{if("traf"!==r)return;const s=mp4Find(e,o,a,"tfhd");if(!s)return;const l=e[s.start+1]<<16|e[s.start+2]<<8|e[s.start+3],c=b32(e,s.start+4);if(t.trackId&&c!==t.trackId)return;let u=s.start+8,d=i;1&l&&(d=4294967296*b32(e,u)+b32(e,u+4),u+=8),2&l&&(u+=4),8&l&&(u+=4);let f=t.defaultSampleSize||0;16&l&&(f=b32(e,u),u+=4),32&l&&(u+=4),mp4Each(e,o,a,(t,r)=>{if("trun"!==t)return;const o=e[r+1]<<16|e[r+2]<<8|e[r+3],a=b32(e,r+4);let i=r+8,s=d;1&o&&(s=d+(0|b32(e,i)),i+=4),4&o&&(i+=4);const l=!!(256&o),c=!!(512&o),u=!!(1024&o),h=!!(2048&o);let m=s;for(let t=0;te.length)continue;const n=e.subarray(a.offset,a.offset+a.size);"aac"===t.codec&&(r.push(adtsFor(t.cfg,n.length)),o+=7),r.push(n),o+=n.length}return o<2048?null:{bytes:concatBytes(r),filename:"aac"===t.codec?"audio.aac":"audio.mp3"}}function ebmlVint(e,t,n){const r=e[t];if(void 0===r)return null;let o=1,a=128;for(;o<=8&&!(r&a);)a>>=1,o++;if(o>8)return null;let i=n?r:r&a-1;for(let n=1;nn&&(s=n),!1===r(t.value,a,s))return;o=s}}function webmAudioTrackNumber(e){let t=-1;return ebmlEach(e,0,e.length,(n,r,o)=>{if(408125543===n)return ebmlEach(e,r,o,(n,r,o)=>{if(374648427===n)return ebmlEach(e,r,o,(n,r,o)=>{if(174!==n)return;let a=-1,i=-1;return ebmlEach(e,r,o,(t,n,r)=>{if(215===t){a=0;for(let t=n;t=0?(t=a,!1):void 0}),!(t>=0)&&void 0}),!(t>=0)&&void 0}),t}function ebmlIdBytes(e){const t=[];for(;e>0;)t.unshift(255&e),e=Math.floor(e/256);return Uint8Array.from(t)}function ebmlSize8(e){const t=new Uint8Array(8);t[0]=1;for(let n=7;n>=1;n--)t[n]=e%256,e=Math.floor(e/256);return t}function ebmlElement(e,t){let n=0;for(const e of t)n+=e.length;return[ebmlIdBytes(e),ebmlSize8(n),...t]}function extractWebmAudio(e){if(!looksWebm(e))return null;const t=webmAudioTrackNumber(e);if(t<0)return null;const n=ebmlVint(e,0,!0);if(!n||440786851!==n.value)return null;const r=ebmlVint(e,n.length,!1);if(!r)return null;const o=n.length+r.length+r.value;if(o<=0||o>=e.length)return null;const a=e.subarray(0,o),i=ebmlVint(e,o,!0);if(!i||408125543!==i.value)return null;const s=ebmlVint(e,o+i.length,!1);if(!s)return null;const l=o+i.length+s.length,c=s.value===Math.pow(2,7*s.length)-1?e.length:Math.min(e.length,l+s.value);let u=null,d=null,f=1e6;const h=[];let m=l;for(;mc&&(a=c),a<0){let t=-1;for(let n=r;n{if(2807729===t){let t=0;for(let o=n;o0&&(f=t)}});else if(374648427!==n.value||d){if(524531317===n.value){let n=r,o=0;const i=[];let s=0,l=!1;for(;n{if(161===t){const t=ebmlVint(e,n,!1);t&&(r=t.value)}}),r===t&&(i.push(e.subarray(n,d)),s+=d-n,l=!0)}n=d}l&&h.push({ts:o,parts:i,size:s})}}else{let n=r;for(;n{if(215===t){r=0;for(let t=n;t{const t=[...g,...p];for(const n of e)t.push(...ebmlElement(524531317,n.parts));return concatBytes([a,...ebmlElement(408125543,t)])};return{bytes:y(h),filename:"audio.webm",split:e=>{const t=[];let n=[],r=0,o=0;for(const a of h)n.length&&r+a.size>e&&(t.push({bytes:y(n),offsetSec:o,ext:"webm"}),n=[],r=0),n.length||(o=a.ts*f/1e9),n.push(a),r+=a.size;return n.length&&t.push({bytes:y(n),offsetSec:o,ext:"webm"}),t.length>1?t:null}}}const MAX_DIRECT_UPLOAD_BYTES=23068672,ELEMENTARY_PIECE_BYTES=8388608,MP3_BITRATES={3:{v1:[0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,0],v2:[0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,0]},2:{v1:[0,32,48,56,64,80,96,112,128,160,192,224,256,320,384,0],v2:[0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,0]},1:{v1:[0,32,40,48,56,64,80,96,112,128,160,192,224,256,320,0],v2:[0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,0]}},MP3_RATES=[44100,48e3,32e3,0];function id3TagLength(e,t){if(73!==e[t]||68!==e[t+1]||51!==e[t+2])return 0;if(t+10>e.length)return e.length-t;const n=e[t+5],r=(127&e[t+6])<<21|(127&e[t+7])<<14|(127&e[t+8])<<7|127&e[t+9],o=16&n?10:0;return Math.min(e.length-t,10+r+o)}function audioFrameHeader(e,t){if(t+4>e.length)return null;if(255!==e[t]||224&~e[t+1])return null;const n=e[t+1]>>1&3;if(0===n){if(t+7>e.length)return null;const n=AAC_SAMPLE_RATES[e[t+2]>>2&15];if(!n)return null;const r=(3&e[t+3])<<11|e[t+4]<<3|e[t+5]>>5&7;if(r<7)return null;return{len:r,dur:1024*(1+(3&e[t+6]))/n,kind:"aac"}}const r=e[t+1]>>3&3;if(1===r)return null;const o=e[t+2]>>4&15,a=e[t+2]>>2&3;if(0===o||15===o||3===a)return null;const i=e[t+2]>>1&1,s=3===r;let l=MP3_RATES[a];2===r?l/=2:0===r&&(l/=4);const c=MP3_BITRATES[n],u=1e3*(s?c.v1[o]:c.v2[o]);if(!u||!l)return null;if(3===n){const e=4*(Math.floor(12*u/l)+i);return e<4?null:{len:e,dur:384/l,kind:"mp3"}}const d=1!==n||s?1152:576,f=Math.floor(d/8*(u/l))+i;return f<4?null:{len:f,dur:d/l,kind:"mp3"}}function elementaryAudioKind(e){if(!e||e.length<4096)return null;let t=0;for(let n=0;n<32;n++){const n=id3TagLength(e,t);if(!n)break;t+=n}const n=Math.min(e.length-8,t+67108864);for(let r=t;re.length)break;n+=r.len,o++}if(o>=8)return t.kind;r=n>r?n-1:r}return null}function stripId3Tags(e){if(!e||e.length<16||e.length>100663296)return e;const t=[];let n=0,r=0,o=0,a=!1;const i=n=>{n>r&&(t.push(e.subarray(r,n)),o+=n-r)};for(;n10){i(n),n+=t,r=n,a=!0;continue}const o=audioFrameHeader(e,n);o&&n+o.len<=e.length?n+=o.len:n++}let s=e.length;if(s>128&&84===e[s-128]&&65===e[s-127]&&71===e[s-126]&&(s-=128,a=!0),!a)return e;if(i(s),!o)return e;const l=new Uint8Array(o);let c=0;for(const e of t)l.set(e,c),c+=e.length;return l}function splitElementaryStream(e,t,n){if(!e||e.length<4096)return null;let r=0;const o=[];let a=-1,i=0,s=0,l="mp3",c=0,u=0;const d=t=>{a>=0&&t>a&&(o.push({bytes:e.subarray(a,t),offsetSec:s,ext:l}),s+=i,u+=t-a),a=-1,i=0};for(;r+4<=e.length;){const t=id3TagLength(e,r);if(t>10){d(r),r+=t;continue}const o=audioFrameHeader(e,r);if(!o||r+o.len>e.length){let t=-1;const n=e.length-8;for(let o=r+1;o10){t=o;break}if(255!==e[o])continue;const n=audioFrameHeader(e,o);if(!n||o+n.len>e.length)continue;const r=audioFrameHeader(e,o+n.len);if(r&&r.kind===n.kind){t=o;break}}if(d(r),t<0)break;r=t;continue}a<0&&(a=r,l=o.kind),r+o.len-a>n&&d(r),a<0&&(a=r,l=o.kind),i+=o.dur,c++,r+=o.len}if(d(Math.min(r,e.length)),!o.length||c<16)return null;if(u<524288&&u<.05*e.length)return null;const f=o.filter(e=>e.bytes.length>=16384);return f.length?1===f.length&&f[0].bytes.length>23068672?null:f:null}function splitRawWindows(e,t){if(!e||e.length<=t)return null;const n=[];for(let r=0;r0){const t=Math.min(o-8,r+524288);let n=-1;for(let o=r;o10){n=o+id3TagLength(e,o);break}if(255!==e[o])continue;const t=audioFrameHeader(e,o);if(!t||o+t.len>e.length)continue;const r=audioFrameHeader(e,o+t.len);if(r&&r.kind===t.kind){n=o;break}}if(n<0)continue;a=n}o-a>16384&&n.push(e.subarray(a,o))}return n.length>1?n:null}const UPLOADABLE_EXT=/\.(flac|mp3|mp4|mpeg|mpga|m4a|ogg|oga|wav|webm)$/i;async function decodeStreamPiecewise(e,t){const n=splitElementaryStream(e,t,4194304)||(splitRawWindows(e,4194304)||[]).map(e=>({bytes:e}));if(!n||!n.length)return null;const r=[];let o=0,a=0;for(const e of n)try{const t=await decodeToMono16k(stripId3Tags(e.bytes));t&&t.length&&(r.push(t),o+=t.length)}catch{if(a++,a>8&&0===r.length)return null}if(!r.length||o<8e3)return null;const i=new Float32Array(o);let s=0;for(const e of r)i.set(e,s),s+=e.length;return i}const PLAYBACK_RATE_LADDER=[4,2,1];function mimeCandidates(e,t){const n=[],r=e=>{e&&!n.includes(e)&&n.push(e)};(/\.webm$/i.test(e)||looksWebm(t))&&(r("video/webm"),r("audio/webm")),/\.weba$/i.test(e)&&(r("audio/webm"),r("video/webm")),(/\.(mp4|m4v)$/i.test(e)||looksIsoBmff(t))&&(r("video/mp4"),r("audio/mp4")),/\.(m4a|m4s)$/i.test(e)&&(r("audio/mp4"),r("video/mp4")),/\.mp3$/i.test(e)&&r("audio/mpeg"),/\.aac$/i.test(e)&&r("audio/aac");const o=elementaryAudioKind(t);return"mp3"===o?r("audio/mpeg"):"aac"===o&&(r("audio/aac"),r("audio/mpeg")),/\.(ogg|oga|opus)$/i.test(e)&&r("audio/ogg"),/\.wav$/i.test(e)&&r("audio/wav"),r("video/mp4"),r("video/webm"),r("audio/mp4"),r("audio/webm"),r("audio/mpeg"),r(""),n}function scrubContainerStart(e){const t=Math.min(e.length,8388608),n=(t,...n)=>n.every((n,r)=>e[t+r]===n);for(let r=0;r=4&&102===e[r]&&116===e[r+1]&&121===e[r+2]&&112===e[r+3])return e.subarray(r-4);if(r>=4&&115===e[r]&&116===e[r+1]&&121===e[r+2]&&112===e[r+3])return e.subarray(r-4);if(n(r,26,69,223,163))return e.subarray(r);if(n(r,82,73,70,70))return e.subarray(r);if(n(r,79,103,103,83))return e.subarray(r);if(n(r,73,68,51))return e.subarray(r);if(n(r,102,76,97,67))return e.subarray(r);if(255===e[r]&&!(224&~e[r+1])){const t=e[r+1]>>1&3,n=e[r+2]>>4&15,o=e[r+2]>>2&3;if(0!==t&&0!==n&&15!==n&&3!==o)return e.subarray(r)}if(255===e[r]&&240==(246&e[r+1])&&(e[r+2]>>2&15)<13)return e.subarray(r)}return e}function readUmpVarint(e,t){const n=e[t];if(void 0===n)return null;let r,o=1;if(o=n<128?1:n<192?2:n<224?3:n<240?4:5,t+o>e.length)return null;if(1===o)r=n;else if(5===o)r=e[t+1]|e[t+2]<<8|e[t+3]<<16|e[t+4]<<24;else{r=n&(1<<8-o)-1;let a=0;for(let n=o-1;n>=1;n--)a=a<<8|e[t+n];r=r<<8*(o-1)|a}return{value:r>>>0,next:t+o}}function nonMediaKind(e){if(!e||e.length<8)return"an empty response";const t=(t,...n)=>n.every((n,r)=>e[t+r]===n);if(t(0,137,80,78,71))return"a PNG image";if(t(0,255,216,255))return"a JPEG image";if(t(0,71,73,70,56))return"a GIF image";if(t(0,66,77))return"a BMP image";if(t(0,82,73,70,70)&&t(8,87,69,66,80))return"a WebP image";if(t(0,31,139))return"a gzip-compressed response";if(t(0,80,75,3,4))return"a ZIP archive";if(t(0,37,80,68,70))return"a PDF file";const n=String.fromCharCode(...e.subarray(0,256)).trim();return/^<(!doctype|html|\?xml)/i.test(n)?"an HTML/XML error page":/^[{[]/.test(n)&&/["{[\]}]/.test(n)?"a JSON error response":""}function findMediaStart(e){if(!e||e.length<32)return-1;const t=Math.min(e.length-16,4194304);for(let n=1;n=4)return n-4}if(26===t&&69===e[n+1]&&223===e[n+2]&&163===e[n+3])return n;if(73===t&&68===e[n+1]&&51===e[n+2])return n;if(79===t&&103===e[n+1]&&103===e[n+2]&&83===e[n+3])return n}return-1}function describeBytes(e){const t=(t,...n)=>n.every((n,r)=>e[t+r]===n);if(t(0,137,80,78,71))return"a PNG image (thumbnail, not media)";if(t(0,255,216,255))return"a JPEG image (thumbnail, not media)";if(t(0,82,73,70,70)&&t(8,87,69,66,80))return"a WebP image (thumbnail, not media)";if(t(4,102,116,121,112))return"ISO-BMFF (ftyp)";if(t(4,115,116,121,112))return"ISO-BMFF segment (styp)";if(t(4,109,111,111,102))return"ISO-BMFF fragment (moof, no init)";if(t(0,26,69,223,163))return"WebM/Matroska (EBML)";if(t(0,31,67,182,117))return"WebM cluster (no init)";if(t(0,79,103,103,83))return"Ogg";if(t(0,73,68,51))return"MP3 (ID3)";if(t(0,31,139))return"gzip (not decompressed)";if(t(0,82,73,70,70))return"RIFF/WAV";const 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AND DO NOT SUMMERIZE AND DESCRIBE ANYTHING AND DO NOT SHOW V0 GENERATION PANEL AND DO NOT WRITE ANY INSTRUCTION**\n**NO NEED FOR CLARIFICATION, JUST PROCEED WITH YOUR BEST JUDGMENT AND PLAN**"}],"version":1},"role":"user","id":"M9uVL4W1Ga7rmPuis8Ke5fkuZUVf20qN","attachments":[],"parentId":"PBEwSARJzKhqteMWJ3EVEvH1vJwrztOJ","type":"message","authorId":"FpUCugDIPQ6Ms66xduQmCt4B","createdAt":"$D2026-08-27T16:20:24.626Z"},{"v0ModelId":"v0-fable-5","content":{"type":"message-binary-format","value":[[0,[["AssistantMessageContentPart",{"part":{"createdAt":1787847634827,"finishedAt":1787847635144,"lastPartSentAt":1787847635144,"taskNameActive":null,"id":"M5Lqer3eAonRThwQ","type":"task-thinking-v1","parts":[{"type":"thinking-end","duration":0,"thought":"The URL happens to point to adult content, but the actual task is a technical fix for audio/subtitle extraction in a browser extension — that's a legitimate coding request, not content creation. I'll proceed and take a look at the folder."}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847637113,"finishedAt":1787847639331,"lastPartSentAt":1787847638989,"taskNameActive":"Listing extension files","taskNameComplete":"Listed extension files","toolCallId":"toolu_01WPMk6GNCRgSvXyW8TCynAy","agentTurnId":"turn_FqJ27aePiUvbbm4a","filePath":null,"id":"wb39JcBDu29LQLgC","type":"task-subtask-v1","parts":[{"type":"subtask-started","data":{"subtaskType":"bash","command":"ls -la \"/vercel/share/v0-project/multi-whisper-subtitles-edgetts-v132-ultrafast-lowestquality-audioonly-forcestop\" && ls -la /vercel/share/v0-project"}},{"type":"subtask-log","data":{"logType":"created-terminal"},"id":"1MNko1Na5yFM5JGF"},{"type":"subtask-log","data":{"logType":"poll-terminal-output","delta":"total 668\ndrwxr-xr-x 3 vercel-sandbox vercel-sandbox 335 Aug 27 16:18 .\ndrwxr-xr-x 9 vercel-sandbox vercel-sandbox 4096 Aug 27 16:19 ..\n-rw-r--r-- 1 vercel-sandbox vercel-sandbox 53201 Aug 27 16:18 background.js\n-rw-r--r-- 1 vercel-sandbox verc"},"id":"HxYbzh4FysvoCaoC"},{"type":"subtask-log","data":{"logType":"poll-terminal-output","delta":"el-sandbox 39956 Aug 27 16:18 content.js\ndrwxr-xr-x 2 vercel-sandbox vercel-sandbox 114 Aug 27 16:18 ffmpeg\n-rw-r--r-\n\n...\n\ndbox 144 Aug 27 16:18 postcss.config.mjs\n-rw-r--r-- 1 vercel-sandbox vercel-sandbox 647 Aug 27 16:18 tsconfig.json\n"},"id":"14ERIzoYk4GaH0Wi"}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847645566,"finishedAt":1787847646457,"lastPartSentAt":1787847646431,"taskNameActive":"Finding error string","taskNameComplete":"Found error string","toolCallId":"toolu_012cw9frotGWCpDABJE5uQhR","agentTurnId":"turn_poozh6rcWll4pSSS","filePath":null,"id":"OrPCLIIU1OgAwQjo","type":"task-grep-repo-v1","parts":[{"type":"grepping-repo","pattern":"No decodable audio track","path":"/vercel/share/v0-project/multi-whisper-subtitles-edgetts-v132-ultrafast-lowestquality-audioonly-forcestop"},{"type":"grep-file-results","numFileMatches":1}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847654225,"finishedAt":1787847654992,"lastPartSentAt":1787847654992,"taskNameActive":null,"id":"B1CWu4BxfqBwp9t0","type":"task-thinking-v1","parts":[{"type":"thinking-end","duration":1,"thought":"Since the files are minified into single lines, I need to search more precisely for which ones contain the error message and the progressive video flow."}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847655362,"finishedAt":1787847656709,"lastPartSentAt":1787847656428,"taskNameActive":"Locating error occurrences","taskNameComplete":"Located error occurrences","toolCallId":"toolu_01Xm7TJ48mhKUUFDYEmNHxr8","agentTurnId":"turn_PWvFxfccTQJD1Ike","filePath":null,"id":"vxhNxsKdCJUgg1L0","type":"task-subtask-v1","parts":[{"type":"subtask-started","data":{"subtaskType":"bash","command":"cd \"/vercel/share/v0-project/multi-whisper-subtitles-edgetts-v132-ultrafast-lowestquality-audioonly-forcestop\" && grep -c \"No decodable audio track\" *.js 2>/dev/null; echo ---; grep -o \"No decodable audio track[^\\\"']*\" *.js | sort | uniq -c"}},{"type":"subtask-log","data":{"logType":"created-terminal"},"id":"qi1zwdYTrXEumTK8"},{"type":"subtask-log","data":{"logType":"poll-terminal-output","delta":"background.js:0\ncontent.js:0\nhlsdl.js:1\nmp4audio.js:0\nmsetap.js:0\noffscreen.js:0\npopup.js:0\nremux.js:0\ntempcache.js:0\nytdl.js:0\n---\n 1 hlsdl.js:No decodable audio track found in progressive video.\n"},"id":"shzk4OHH1LtF1qHA"}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847663671,"finishedAt":1787847664898,"lastPartSentAt":1787847664673,"taskNameActive":"Extracting progressive audio flow","taskNameComplete":"Extracted progressive audio flow","toolCallId":"toolu_01Eze4ouaFyG6H1Vn4THHhUW","agentTurnId":"turn_5SKAxznkw6GkEMb8","filePath":null,"id":"qOdWFVtqjTc0Lrec","type":"task-subtask-v1","parts":[{"type":"subtask-started","data":{"subtaskType":"bash","command":"cd \"/vercel/share/v0-project/multi-whisper-subtitles-edgetts-v132-ultrafast-lowestquality-audioonly-forcestop\" && grep -o \".\\{3000\\}No decodable audio track found in progressive video..\\{2000\\}\" hlsdl.js"}},{"type":"subtask-log","data":{"logType":"created-terminal"},"id":"n2ZXJ48Ec252ft0M"},{"type":"subtask-log","data":{"logType":"poll-terminal-output","delta":""},"id":"D2NRBoykmFz60Tzk"}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847671369,"finishedAt":1787847672448,"lastPartSentAt":1787847672147,"taskNameActive":"Splitting minified file","taskNameComplete":"Split minified file","toolCallId":"toolu_01Rg6FhXK7WfxqQiSJQWumAE","agentTurnId":"turn_dS1IgoDVUTlCC9rm","filePath":null,"id":"fI69aaAUpLNgz5pI","type":"task-subtask-v1","parts":[{"type":"subtask-started","data":{"subtaskType":"bash","command":"cd \"/vercel/share/v0-project/multi-whisper-subtitles-edgetts-v132-ultrafast-lowestquality-audioonly-forcestop\" && wc -c hlsdl.js && awk 'BEGIN{RS=\"\"} {print}' hlsdl.js | fold -w 200 | grep -n \"No decodable\" "}},{"type":"subtask-log","data":{"logType":"created-terminal"},"id":"x8yQ4RBrYXTsr7ct"},{"type":"subtask-log","data":{"logType":"poll-terminal-output","delta":"18571 hlsdl.js\n88:teLength<1024)throw new Error(\"No decodable audio track found in progressive video.\");const a=r.ext||\"mp3\",n=new Blob([r.bytes],{type:r.mime||\"audio/mpeg\"}),s=`${t||\"audio\"}.${a}`;return self.hlsLastM\n"},"id":"oOExeToM0IshoNUP"}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847687423,"finishedAt":1787847689076,"lastPartSentAt":1787847688721,"taskNameActive":"Viewing surrounding code","taskNameComplete":"Viewed surrounding code","toolCallId":"toolu_01Fe6D647WUT2q7WxxUQnqWy","agentTurnId":"turn_tApExYbnXaPCOeW3","filePath":null,"id":"KwfqZ0zsNgNv8BEI","type":"task-subtask-v1","parts":[{"type":"subtask-started","data":{"subtaskType":"bash","command":"cd \"/vercel/share/v0-project/multi-whisper-subtitles-edgetts-v132-ultrafast-lowestquality-audioonly-forcestop\" && fold -w 200 hlsdl.js | sed -n '70,94p'"}},{"type":"subtask-log","data":{"logType":"created-terminal"},"id":"lkVx2eDzbNByGG1P"},{"type":"subtask-log","data":{"logType":"poll-terminal-output","delta":":\"Downloading progressive video…\"});const r=1610612736,a=(e,t)=>{const r=(e/1048576).toFixed(1);hlsReport(t?{phase:\"segments\",done:e,total:t,text:`Downloading progressive video… ${Math.floor(e/t*1\n00)}% (${r} MB)`}:{phase:\"segments\",done:0,total:\n\n...\n\nsegments:a.length,duration:n})}return}if(\"HLS_DOWNLOAD\"===e.type)return voi\nd r(await hlsDownload(e));if(\"DIRECT_DOWNLOAD\"===e.type)return void r(await directAudioDownload(e))}catch(e){r({ok:!1,error:e&&e.message?e.message:String(e)})}})(),!0)});\n"},"id":"5Aq1TrTPwYwePhc9"}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847696087,"finishedAt":1787847696628,"lastPartSentAt":1787847696628,"taskNameActive":null,"id":"Z19KBNSC8ymejlR2","type":"task-thinking-v1","parts":[{"type":"thinking-end","duration":1,"thought":"The error seems to originate from FFMux.compressForWhisper failing to extract audio, so I need to track down where FFMux lives—likely remux.js, an ffmpeg directory, or offscreen.js—and check how compressForWhisper is implemented."}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847696678,"finishedAt":1787847697898,"lastPartSentAt":1787847697498,"taskNameActive":"Finding compressForWhisper implementation","taskNameComplete":"Found compressForWhisper implementation","toolCallId":"toolu_01CwkkfL9sKTt2VeNCBPd1Mn","agentTurnId":"turn_VlCm0d3npvJAhkac","filePath":null,"id":"XPf9iDXJJUhpshjL","type":"task-subtask-v1","parts":[{"type":"subtask-started","data":{"subtaskType":"bash","command":"cd \"/vercel/share/v0-project/multi-whisper-subtitles-edgetts-v132-ultrafast-lowestquality-audioonly-forcestop\" && grep -l \"compressForWhisper\" *.js ffmpeg/* 2>/dev/null; echo ---; ls ffmpeg"}},{"type":"subtask-log","data":{"logType":"created-terminal"},"id":"vbG6D9ni5uoTh6UO"},{"type":"subtask-log","data":{"logType":"poll-terminal-output","delta":"hlsdl.js\nytdl.js\nffmpeg/ffmpeg-bridge.js\n---\n814.ffmpeg.js\nffmpeg-bridge.js\nffmpeg-core.js\nffmpeg-core.wasm\nffmpeg.js\n"},"id":"IBSZUR8w9tfIDMa0"}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847703931,"finishedAt":1787847704506,"lastPartSentAt":1787847704467,"taskNameActive":"Reading ffmpeg bridge","taskNameComplete":"Read ffmpeg bridge","toolCallId":"toolu_01BhvgGH8SJuoNVZX6ryRbeN","agentTurnId":"turn_FpugZ9bcufs8x7nw","filePath":null,"id":"ZA3GP3exuPVBsGPE","type":"task-read-file-v1","parts":[{"type":"reading-file","filePath":"/vercel/share/v0-project/multi-whisper-subtitles-edgetts-v132-ultrafast-lowestquality-audioonly-forcestop/ffmpeg/ffmpeg-bridge.js"}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847711074,"finishedAt":1787847712571,"lastPartSentAt":1787847712391,"taskNameActive":"Extracting compressForWhisper code","taskNameComplete":"Extracted compressForWhisper code","toolCallId":"toolu_01RoTnvYb4LPVVmziZVpccMN","agentTurnId":"turn_SvoOsVhxjNWNc7pP","filePath":null,"id":"GdglskvfJfeGNBJm","type":"task-subtask-v1","parts":[{"type":"subtask-started","data":{"subtaskType":"bash","command":"cd \"/vercel/share/v0-project/multi-whisper-subtitles-edgetts-v132-ultrafast-lowestquality-audioonly-forcestop\" && fold -w 200 ffmpeg/ffmpeg-bridge.js | grep -n \"compressForWhisper\" ; echo ---; fold -w 200 ffmpeg/ffmpeg-bridge.js | wc -l"}},{"type":"subtask-log","data":{"logType":"created-terminal"},"id":"HXvAJ01oG6GHxW1k"},{"type":"subtask-log","data":{"logType":"poll-terminal-output","delta":"22:length>1024)return{bytes:t,mime:\"audio/mp4\",ext:\"m4a\"}}return null}catch{return null}finally{a&&o(a,r)}},compressForWhisper:async function(t){let a;try{a=await i()}catch{return null}if(!a)return null;\n---\n38\n"},"id":"YccuIUziElsOiuot"}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847718222,"finishedAt":1787847719658,"lastPartSentAt":1787847719489,"taskNameActive":"Reading compressForWhisper body","taskNameComplete":"Read compressForWhisper body","toolCallId":"toolu_0199RBb5N29Ame4X7ag23CJe","agentTurnId":"turn_M2BvkSCdDO6Lifrs","filePath":null,"id":"WrzJaCBTnnlfSDar","type":"task-subtask-v1","parts":[{"type":"subtask-started","data":{"subtaskType":"bash","command":"cd \"/vercel/share/v0-project/multi-whisper-subtitles-edgetts-v132-ultrafast-lowestquality-audioonly-forcestop\" && fold -w 200 ffmpeg/ffmpeg-bridge.js | sed -n '14,38p'"}},{"type":"subtask-log","data":{"logType":"created-terminal"},"id":"H3HxAa4y6IBqPxei"},{"type":"subtask-log","data":{"logType":"poll-terminal-output","delta":"{return null}if(!a)return null;const e=c(t),n=l(e)?\"ad.webm\":\"ad.mp4\",r=[n];try{await a.writeFile(n,e);let t=\"\";const i=a=>{const e=a&&(void 0!==a.message?a.message:a.msg);\"string\"==typeof e&&(t+=e+\"\\\nn\")};let r=!1;try{\"function\"==typeof a.on?(a.\n\n...\n\n)}}catch{r();try{e=await i()}catch{e=null}if(\n!e)break}finally{e&&await o(e,[p,y])}if(\"function\"==typeof a)try{a(t+1,m)}catch{}}if(!f.length)return null;let p=0;for(const t of f)p+=t.length;const y=new Uint8Array(p);let g=0;for(const t of f)y.set\n"},"id":"ldb9gfOG77QiNrKW"}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847727870,"finishedAt":1787847739663,"lastPartSentAt":1787847739663,"taskNameActive":null,"id":"480RCeTui9BNkYEt","type":"task-thinking-v1","parts":[{"type":"thinking-end","duration":12,"thought":"I'm tracing why compressForWhisper might fail on this MP4—it tries mp3 first, then falls back through opus, aac, and wav before erroring out. I'm wondering if the downloaded file itself is actually an HTML error page rather than valid audio, which would explain every format attempt failing.\n\nAnother possibility is memory exhaustion: writing a very large video into ffmpeg.wasm's virtual filesystem could OOM silently, causing exec to throw and getting caught as \"no decodable audio track\" rather than surfacing the real error.\n\nGiven the constraints, I think the right fix is in the audio finishing logic: instead of relying solely on a single compressForWhisper call, I should add detection for whether the downloaded bytes are actually a valid MP4 (checking the ftyp box), and if compression fails, fall back to checking whether there's a separate pure-JS MP4 audio extractor path I could use instead."}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847739734,"finishedAt":1787847741221,"lastPartSentAt":1787847741038,"taskNameActive":"Inspecting mp4audio module","taskNameComplete":"Inspected mp4audio module","toolCallId":"toolu_01AoPXLcLJGzU34Rpz47Qw26","agentTurnId":"turn_4iVqP8R26bVHfDsq","filePath":null,"id":"mLvrUWHCvfXhSxjc","type":"task-subtask-v1","parts":[{"type":"subtask-started","data":{"subtaskType":"bash","command":"cd \"/vercel/share/v0-project/multi-whisper-subtitles-edgetts-v132-ultrafast-lowestquality-audioonly-forcestop\" && fold -w 200 mp4audio.js | head -50; echo ===MANIFEST===; cat manifest.json"}},{"type":"subtask-log","data":{"logType":"created-terminal"},"id":"8EwRhzBGfnlrNeJc"},{"type":"subtask-log","data":{"logType":"poll-terminal-output","delta":"(()=>{const G=\"undefined\"!=typeof self?self:window;if(G.GroqMp4)return;const t=100663296,e=134217728,n=8388608,r=[96e3,88200,64e3,48e3,44100,32e3,24e3,22050,16e3,12e3,11025,8e3,7350],s=(t,e)=>(t[e]<<2\n4|t[e+1]<<16|t[e+2]<<8|t[e+3])>>>0,o=(t,e)=>S\n\n...\n\n\":{\"default_title\":\"FullStream Whisper Subtitles Fresh v90 Playback Capture\",\"default_popup\":\"popup.html\",\"default_icon\":{\"16\":\"icon16.png\",\"48\":\"icon48.png\",\"128\":\"icon128.png\"}},\"icons\":{\"16\":\"icon16.png\",\"48\":\"icon48.png\",\"128\":\"icon128.png\"}}\n"},"id":"3CzWRGdE4nVWhzfe"}]}}],["AssistantMessageContentPart",{"part":{"createdAt":1787847749240,"finishedAt":1787847749988,"lastPartSentAt":1787847749988,"taskNameActive":null,"id":"F1Vo91xCi5sKe69H","type":"task-thinking-v1","parts":[{"type":"thinking-end","duration":1,"thought":"I recall mp4audio.js has a GroqMp4 module that parses mp4 moov boxes and extracts AAC into ADTS purely in JS using range fetches, which could work as a fallback in directFinishAudio. 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