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m=this.auxWriter.getSlice(0,this.auxWriter.getPos()),C=this.createSampleForTrack(e,m,e.lastCueEndTimestamp,n-e.lastCueEndTimestamp,"key");this.registerSample(e,C),e.lastCueEndTimestamp=n}this.auxWriter.seek(0);for(let f=0;f<e.cueQueue.length;f++){let m=e.cueQueue[f];if(m.timestamp>=a)break;j.lastIndex=0;let C=j.test(m.text),V=m.timestamp+m.duration,k=e.cueToSourceId.get(m);if(k===void 0&&a<V&&(k=e.nextSourceId++,e.cueToSourceId.set(m,k)),m.notes){let B=it(m.notes);this.auxBoxWriter.writeBox(B)}let y=rt(m.text,C?n:null,m.identifier??null,m.settings??null,k??null);this.auxBoxWriter.writeBox(y),V===a&&e.cueQueue.splice(f--,1)}let 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n=this.writer.getPos();this.writer.seek(this.boxWriter.offsets.get(o));let a=Fe(r,this.trackDatas);this.boxWriter.writeBox(a),this.writer.seek(n);for(let u of this.trackDatas)u.finalizedChunks.push(u.currentChunk),this.finalizedChunks.push(u.currentChunk),u.currentChunk=null;e&&this.writer.flush()}onTrackClose(e){if(e.type==="subtitle"&&e.source._codec==="webvtt"){let r=this.trackDatas.find(s=>s.track===e);r&&this.processWebVTTCues(r,1/0)}this.fastStart==="fragmented"&&this.interleaveSamples()}finalize(){for(let e of this.trackDatas)e.type==="subtitle"&&e.track.source._codec==="webvtt"&&this.processWebVTTCues(e,1/0);if(this.fastStart==="fragmented"){for(let e of this.trackDatas){for(let r of e.sampleQueue)this.addSampleToTrack(e,r);this.processTimestamps(e)}this.finalizeFragment(!1)}else for(let e of this.trackDatas)this.processTimestamps(e),this.finalizeCurrentChunk(e);if(this.fastStart==="in-memory"){c(this.mdat);let e;for(let s=0;s<2;s++){let o=ee(this.trackDatas,this.creationTime),n=this.boxWriter.measureBox(o);e=this.boxWriter.measureBox(this.mdat);let a=this.writer.getPos()+n+e;for(let u of this.finalizedChunks){u.offset=a;for(let{data:d}of u.samples)c(d),a+=d.byteLength,e+=d.byteLength}if(a<2**32)break;e>=2**32&&(this.mdat.largeSize=!0)}let r=ee(this.trackDatas,this.creationTime);this.boxWriter.writeBox(r),this.mdat.size=e,this.boxWriter.writeBox(this.mdat);for(let s of this.finalizedChunks)for(let o of s.samples)c(o.data),this.writer.write(o.data),o.data=null}else if(this.fastStart==="fragmented"){let e=this.writer.getPos(),r=et(this.trackDatas);this.boxWriter.writeBox(r);let s=this.writer.getPos()-e;this.writer.seek(this.writer.getPos()-4),this.boxWriter.writeU32(s)}else{c(this.mdat),c(this.ftypSize!==null);let e=this.boxWriter.offsets.get(this.mdat);c(e!==void 0);let r=this.writer.getPos()-e;this.mdat.size=r,this.mdat.largeSize=r>=2**32,this.boxWriter.patchBox(this.mdat);let s=ee(this.trackDatas,this.creationTime);if(typeof this.fastStart=="object"){this.writer.seek(this.ftypSize),this.boxWriter.writeBox(s);let o=e-this.writer.getPos();this.boxWriter.writeBox(Ze(o))}else this.boxWriter.writeBox(s)}}};var ie=class{constructor(i){this.value=i}},G=class{constructor(i){this.value=i}},se=class{constructor(i){this.value=i}};var Ne=t=>t<256?1:t<65536?2:t<1<<24?3:t<2**32?4:t<2**40?5:6,He=t=>t>=-64&&t<64?1:t>=-8192&&t<8192?2:t>=-(1<<20)&&t<1<<20?3:t>=-(1<<27)&&t<1<<27?4:t>=-(2**34)&&t<2**34?5:6,nt=t=>{if(t<127)return 1;if(t<16383)return 2;if(t<(1<<21)-1)return 3;if(t<(1<<28)-1)return 4;if(t<2**35-1)return 5;if(t<2**42-1)return 6;throw new Error("EBML VINT size not supported "+t)};var $e=2**15,at="https://github.com/Vanilagy/webm-muxer",ut=6,lt=5,Tr={avc:"V_MPEG4/ISO/AVC",hevc:"V_MPEGH/ISO/HEVC",vp8:"V_VP8",vp9:"V_VP9",av1:"V_AV1",aac:"A_AAC",opus:"A_OPUS",webvtt:"S_TEXT/WEBVTT"},Cr={video:1,audio:2,subtitle:17},we=class extends Q{constructor(e,r){super(e);this.timestampsMustStartAtZero=!1;this.helper=new Uint8Array(8);this.helperView=new DataView(this.helper.buffer);this.offsets=new WeakMap;this.dataOffsets=new WeakMap;this.trackDatas=[];this.segment=null;this.segmentInfo=null;this.seekHead=null;this.tracksElement=null;this.segmentDuration=null;this.cues=null;this.currentCluster=null;this.currentClusterMsTimestamp=null;this.trackDatasInCurrentCluster=new Set;this.duration=0;this.writer=e._writer,this.format=r,this.format.options.streamable&&(this.writer.ensureMonotonicity=!0)}writeByte(e){this.helperView.setUint8(0,e),this.writer.write(this.helper.subarray(0,1))}writeFloat32(e){this.helperView.setFloat32(0,e,!1),this.writer.write(this.helper.subarray(0,4))}writeFloat64(e){this.helperView.setFloat64(0,e,!1),this.writer.write(this.helper)}writeUnsignedInt(e,r=Ne(e)){let s=0;switch(r){case 6:this.helperView.setUint8(s++,e/2**40|0);case 5:this.helperView.setUint8(s++,e/2**32|0);case 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6:this.helperView.setUint8(s++,4|e/2**40&3),this.helperView.setUint8(s++,e/2**32|0),this.helperView.setUint8(s++,e>>24),this.helperView.setUint8(s++,e>>16),this.helperView.setUint8(s++,e>>8),this.helperView.setUint8(s++,e);break;default:throw new Error("Bad EBML VINT size "+r)}this.writer.write(this.helper.subarray(0,s))}writeString(e){this.writer.write(new Uint8Array(e.split("").map(r=>r.charCodeAt(0))))}writeEBML(e){if(e!==null){if(e instanceof Uint8Array)this.writer.write(e);else if(Array.isArray(e))for(let r of e)this.writeEBML(r);else if(this.offsets.set(e,this.writer.getPos()),this.writeUnsignedInt(e.id),Array.isArray(e.data)){let r=this.writer.getPos(),s=e.size===-1?1:e.size??4;e.size===-1?this.writeByte(255):this.writer.seek(this.writer.getPos()+s);let o=this.writer.getPos();if(this.dataOffsets.set(e,o),this.writeEBML(e.data),e.size!==-1){let n=this.writer.getPos()-o,a=this.writer.getPos();this.writer.seek(r),this.writeEBMLVarInt(n,s),this.writer.seek(a)}}else if(typeof e.data=="number"){let r=e.size??Ne(e.data);this.writeEBMLVarInt(r),this.writeUnsignedInt(e.data,r)}else if(typeof e.data=="string")this.writeEBMLVarInt(e.data.length),this.writeString(e.data);else if(e.data instanceof Uint8Array)this.writeEBMLVarInt(e.data.byteLength,e.size),this.writer.write(e.data);else if(e.data instanceof ie)this.writeEBMLVarInt(4),this.writeFloat32(e.data.value);else if(e.data instanceof G)this.writeEBMLVarInt(8),this.writeFloat64(e.data.value);else if(e.data instanceof se){let r=e.size??He(e.data.value);this.writeEBMLVarInt(r),this.writeSignedInt(e.data.value,r)}}}beforeTrackAdd(e){if(this.format instanceof P)if(e.type==="video"){if(!["vp8","vp9","av1"].includes(e.source._codec))throw new Error("WebM only supports VP8, VP9 and AV1 as video codecs. Switching to MKV removes this restriction.")}else if(e.type==="audio"){if(!["opus","vorbis"].includes(e.source._codec))throw new Error("WebM only supports Opus and Vorbis as audio codecs. Switching to MKV removes this restriction.")}else if(e.type==="subtitle"){if(e.source._codec!=="webvtt")throw new Error("WebM only supports WebVTT as subtitle codec. Switching to MKV removes this restriction.")}else throw new Error("WebM only supports video, audio and subtitle tracks. Switching to MKV removes this restriction.")}start(){this.writeEBMLHeader(),this.format.options.streamable||this.createSeekHead(),this.createSegmentInfo(),this.createCues(),this.writer.flush()}writeEBMLHeader(){let e={id:440786851,data:[{id:17030,data:1},{id:17143,data:1},{id:17138,data:4},{id:17139,data:8},{id:17026,data:this.format instanceof P?"webm":"matroska"},{id:17031,data:2},{id:17029,data:2}]};this.writeEBML(e)}createSeekHead(){let e=new Uint8Array([28,83,187,107]),r=new Uint8Array([21,73,169,102]),s=new Uint8Array([22,84,174,107]),o={id:290298740,data:[{id:19899,data:[{id:21419,data:e},{id:21420,size:5,data:0}]},{id:19899,data:[{id:21419,data:r},{id:21420,size:5,data:0}]},{id:19899,data:[{id:21419,data:s},{id:21420,size:5,data:0}]}]};this.seekHead=o}createSegmentInfo(){let e={id:17545,data:new G(0)};this.segmentDuration=e;let r={id:357149030,data:[{id:2807729,data:1e6},{id:19840,data:at},{id:22337,data:at},this.format.options.streamable?null:e]};this.segmentInfo=r}createTracks(){let e={id:374648427,data:[]};this.tracksElement=e;for(let r of this.trackDatas)e.data.push({id:174,data:[{id:215,data:r.track.id},{id:29637,data:r.track.id},{id:131,data:Cr[r.type]},{id:134,data:Tr[r.track.source._codec]},...r.type==="video"?[r.info.decoderConfig.description?{id:25506,data:D(r.info.decoderConfig.description)}:null,r.track.metadata.frameRate?{id:2352003,data:1e9/r.track.metadata.frameRate}:null,{id:224,data:[{id:176,data:r.info.width},{id:186,data:r.info.height},(()=>{if(r.info.decoderConfig.colorSpace){let s=r.info.decoderConfig.colorSpace;return ue(s)?{id:21936,data:[{id:21937,data:$[s.matrix]},{id:21946,data:H[s.transfer]},{id:21947,data:N[s.primaries]},{id:21945,data:[1,2][Number(s.fullRange)]}]}:null}return null})()]}]:[],...r.type==="audio"?[r.info.decoderConfig.description?{id:25506,data:D(r.info.decoderConfig.description)}:null,{id:225,data:[{id:181,data:new ie(r.info.sampleRate)},{id:159,data:r.info.numberOfChannels}]}]:[],...r.type==="subtitle"?[{id:25506,data:S.encode(r.info.config.description)}]:[]]})}createSegment(){let e={id:408125543,size:this.format.options.streamable?-1:ut,data:[this.format.options.streamable?null:this.seekHead,this.segmentInfo,this.tracksElement]};this.segment=e,this.writeEBML(e)}createCues(){this.cues={id:475249515,data:[]}}get segmentDataOffset(){return c(this.segment),this.dataOffsets.get(this.segment)}getVideoTrackData(e,r){let s=this.trackDatas.find(n=>n.track===e);if(s)return s;Te(r),c(r),c(r.decoderConfig),c(r.decoderConfig.codedWidth!==void 0),c(r.decoderConfig.codedHeight!==void 0);let o={track:e,type:"video",info:{width:r.decoderConfig.codedWidth,height:r.decoderConfig.codedHeight,decoderConfig:r.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(o),this.trackDatas.sort((n,a)=>n.track.id-a.track.id),o}getAudioTrackData(e,r){let s=this.trackDatas.find(n=>n.track===e);if(s)return s;Ce(r),c(r),c(r.decoderConfig);let o={track:e,type:"audio",info:{numberOfChannels:r.decoderConfig.numberOfChannels,sampleRate:r.decoderConfig.sampleRate,decoderConfig:r.decoderConfig},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(o),this.trackDatas.sort((n,a)=>n.track.id-a.track.id),o}getSubtitleTrackData(e,r){let s=this.trackDatas.find(n=>n.track===e);if(s)return s;ge(r),c(r),c(r.config);let o={track:e,type:"subtitle",info:{config:r.config},chunkQueue:[],lastWrittenMsTimestamp:null};return this.trackDatas.push(o),this.trackDatas.sort((n,a)=>n.track.id-a.track.id),o}addEncodedVideoChunk(e,r,s){let o=this.getVideoTrackData(e,s),n=new Uint8Array(r.byteLength);r.copyTo(n);let a=this.validateAndNormalizeTimestamp(o.track,r.timestamp,r.type==="key"),u=this.createInternalChunk(n,a,(r.duration??0)/1e6,r.type);e.source._codec==="vp9"&&this.fixVP9ColorSpace(o,u),o.chunkQueue.push(u),this.interleaveChunks()}addEncodedAudioChunk(e,r,s){let o=this.getAudioTrackData(e,s),n=new Uint8Array(r.byteLength);r.copyTo(n);let a=this.validateAndNormalizeTimestamp(o.track,r.timestamp,r.type==="key"),u=this.createInternalChunk(n,a,(r.duration??0)/1e6,r.type);o.chunkQueue.push(u),this.interleaveChunks()}addSubtitleCue(e,r,s){let o=this.getSubtitleTrackData(e,s),n=this.validateAndNormalizeTimestamp(o.track,1e6*r.timestamp,!0),a=r.text,u=Math.floor(n*1e3);j.lastIndex=0,a=a.replace(j,C=>{let k=ce(C.slice(1,-1))-u;return`<${de(k)}>`});let d=S.encode(a),f=`${r.settings??""}
${r.identifier??""}
${r.notes??""}`,m=this.createInternalChunk(d,n,r.duration,"key",f.trim()?S.encode(f):null);o.chunkQueue.push(m),this.interleaveChunks()}interleaveChunks(){for(let e of this.output._tracks)if(!e.source._closed&&!this.trackDatas.some(r=>r.track===e))return;e:for(;;){let e=null,r=1/0;for(let o of this.trackDatas){if(o.chunkQueue.length===0&&!o.track.source._closed)break e;o.chunkQueue.length>0&&o.chunkQueue[0].timestamp<r&&(e=o,r=o.chunkQueue[0].timestamp)}if(!e)break;let s=e.chunkQueue.shift();this.writeBlock(e,s)}this.writer.flush()}fixVP9ColorSpace(e,r){if(r.type!=="key"||!e.info.decoderConfig.colorSpace||!e.info.decoderConfig.colorSpace.matrix)return;let s=0;if(z(r.data,0,2)!==2)return;s+=2;let o=(z(r.data,s+1,s+2)<<1)+z(r.data,s+0,s+1);s+=2,o===3&&s++;let n=z(r.data,s+0,s+1);if(s++,n)return;let a=z(r.data,s+0,s+1);if(s++,a!==0)return;s+=2;let u=z(r.data,s+0,s+24);if(s+=24,u!==4817730)return;o>=2&&s++;let d={rgb:7,bt709:2,bt470bg:1,smpte170m:3}[e.info.decoderConfig.colorSpace.matrix];je(r.data,s+0,s+3,d)}createInternalChunk(e,r,s,o,n=null){return{data:e,type:o,timestamp:r,duration:s,additions:n}}writeBlock(e,r){this.segment||(this.createTracks(),this.createSegment());let s=Math.floor(1e3*r.timestamp),o=this.trackDatas.every(m=>{if(m.track.source._closed)return!0;if(e===m)return r.type==="key";let C=m.chunkQueue[0];return C&&C.type==="key"});(!this.currentCluster||o&&s-this.currentClusterMsTimestamp>=1e3)&&this.createNewCluster(s);let n=s-this.currentClusterMsTimestamp;if(n<0)return;if(n>=$e)throw new Error(`Current Matroska cluster exceeded its maximum allowed length of ${$e} milliseconds. In order to produce a correct WebM file, you must pass in a key frame at least every ${$e} milliseconds.`);let u=new Uint8Array(4),d=new DataView(u.buffer);d.setUint8(0,128|e.track.id),d.setInt16(1,n,!1);let f=Math.floor(1e3*r.duration);if(f===0&&!r.additions){d.setUint8(3,+(r.type==="key")<<7);let m={id:163,data:[u,r.data]};this.writeEBML(m)}else{let m={id:160,data:[{id:161,data:[u,r.data]},r.type==="delta"?{id:251,data:new se(e.lastWrittenMsTimestamp-s)}:null,r.additions?{id:30113,data:[{id:166,data:[{id:165,data:r.additions},{id:238,data:1}]}]}:null,f>0?{id:155,data:f}:null]};this.writeEBML(m)}this.duration=Math.max(this.duration,s+f),e.lastWrittenMsTimestamp=s,this.trackDatasInCurrentCluster.add(e)}createNewCluster(e){this.currentCluster&&!this.format.options.streamable&&this.finalizeCurrentCluster(),this.currentCluster={id:524531317,size:this.format.options.streamable?-1:lt,data:[{id:231,data:e}]},this.writeEBML(this.currentCluster),this.currentClusterMsTimestamp=e,this.trackDatasInCurrentCluster.clear()}finalizeCurrentCluster(){c(this.currentCluster);let e=this.writer.getPos()-this.dataOffsets.get(this.currentCluster),r=this.writer.getPos();this.writer.seek(this.offsets.get(this.currentCluster)+4),this.writeEBMLVarInt(e,lt),this.writer.seek(r);let s=this.offsets.get(this.currentCluster)-this.segmentDataOffset;c(this.cues),this.cues.data.push({id:187,data:[{id:179,data:this.currentClusterMsTimestamp},...[...this.trackDatasInCurrentCluster].map(o=>({id:183,data:[{id:247,data:o.track.id},{id:241,data:s}]}))]})}onTrackClose(){this.interleaveChunks()}finalize(){this.segment||(this.createTracks(),this.createSegment());for(let e of this.trackDatas)for(;e.chunkQueue.length>0;)this.writeBlock(e,e.chunkQueue.shift());if(!this.format.options.streamable&&this.currentCluster&&this.finalizeCurrentCluster(),c(this.cues),this.writeEBML(this.cues),!this.format.options.streamable){let e=this.writer.getPos(),r=this.writer.getPos()-this.segmentDataOffset;this.writer.seek(this.offsets.get(this.segment)+4),this.writeEBMLVarInt(r,ut),this.segmentDuration.data=new G(this.duration),this.writer.seek(this.offsets.get(this.segmentDuration)),this.writeEBML(this.segmentDuration),this.seekHead.data[0].data[1].data=this.offsets.get(this.cues)-this.segmentDataOffset,this.seekHead.data[1].data[1].data=this.offsets.get(this.segmentInfo)-this.segmentDataOffset,this.seekHead.data[2].data[1].data=this.offsets.get(this.tracksElement)-this.segmentDataOffset,this.writer.seek(this.offsets.get(this.seekHead)),this.writeEBML(this.seekHead),this.writer.seek(e)}}};var M=class{},ye=class extends M{constructor(e={}){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(e.fastStart!==void 0&&![!1,"in-memory","fragmented"].includes(e.fastStart))throw new TypeError('options.fastStart, when provided, must be false, "in-memory", or "fragmented".');super();this.options=e}_createMuxer(e){return new ke(e,this)}},oe=class extends M{constructor(e={}){if(!e||typeof e!="object")throw new TypeError("options must be an object.");if(e.streamable!==void 0&&typeof e.streamable!="boolean")throw new TypeError("options.streamable, when provided, must be a boolean.");super();this.options=e}_createMuxer(e){return new we(e,this)}},P=class extends oe{};var q=["avc","hevc","vp8","vp9","av1"],Y=["aac","opus"],Se=["webvtt"],W=class{constructor(){this._connectedTrack=null;this._closed=!1;this._offsetTimestamps=!1}_ensureValidDigest(){if(!this._connectedTrack)throw new Error("Cannot call digest without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call digest before output has been started.");if(this._connectedTrack.output._finalizing)throw new Error("Cannot call digest after output has started finalizing.");if(this._closed)throw new Error("Cannot call digest after source has been closed.")}_start(){}async _flush(){}close(){if(this._closed)throw new Error("Source already closed.");if(!this._connectedTrack)throw new Error("Cannot call close without connecting the source to an output track.");if(!this._connectedTrack.output._started)throw new Error("Cannot call close before output has been started.");this._closed=!0,!this._connectedTrack.output._finalizing&&this._connectedTrack.output._muxer.onTrackClose(this._connectedTrack)}},_=class extends W{constructor(e){super();this._connectedTrack=null;if(!q.includes(e))throw new TypeError(`Invalid video codec '${e}'. Must be one of: ${q.join(", ")}.`);this._codec=e}},xe=class extends _{constructor(i){super(i)}digest(i,e){if(!(i instanceof EncodedVideoChunk))throw new TypeError("chunk must be an EncodedVideoChunk.");this._ensureValidDigest(),this._connectedTrack?.output._muxer.addEncodedVideoChunk(this._connectedTrack,i,e)}},gr=5,kr=t=>{if(!t||typeof t!="object")throw new TypeError("Codec config must be an object.");if(!q.includes(t.codec))throw new TypeError(`Invalid video codec '${t.codec}'. Must be one of: ${q.join(", ")}.`);if(!Number.isInteger(t.bitrate)||t.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.");if(t.latencyMode!==void 0&&["quality","realtime"].includes(t.latencyMode))throw new TypeError("config.latencyMode, when provided, must be 'quality' or 'realtime'.")},ne=class{constructor(i,e){this.source=i;this.codecConfig=e;this.encoder=null;this.lastMultipleOfKeyFrameInterval=-1;this.lastWidth=null;this.lastHeight=null;kr(e)}digest(i){if(this.source._ensureValidDigest(),this.lastWidth!==null&&this.lastHeight!==null){if(i.codedWidth!==this.lastWidth||i.codedHeight!==this.lastHeight)throw new Error(`Video frame size must remain constant. Expected ${this.lastWidth}x${this.lastHeight}, got ${i.codedWidth}x${i.codedHeight}.`)}else this.lastWidth=i.codedWidth,this.lastHeight=i.codedHeight;this.ensureEncoder(i),c(this.encoder);let e=Math.floor(i.timestamp/1e6/gr);this.encoder.encode(i,{keyFrame:e!==this.lastMultipleOfKeyFrameInterval}),this.lastMultipleOfKeyFrameInterval=e}ensureEncoder(i){this.encoder||(this.encoder=new VideoEncoder({output:(e,r)=>this.source._connectedTrack?.output._muxer.addEncodedVideoChunk(this.source._connectedTrack,e,r),error:e=>console.error("Video encode error:",e)}),this.encoder.configure({codec:st(this.codecConfig.codec,i.codedWidth,i.codedHeight),width:i.codedWidth,height:i.codedHeight,bitrate:this.codecConfig.bitrate,framerate:this.source._connectedTrack?.metadata.frameRate,latencyMode:this.codecConfig.latencyMode}))}async flush(){return this.encoder?.flush()}},ve=class extends _{constructor(i){super(i.codec),this._encoder=new ne(this,i)}digest(i){if(!(i instanceof VideoFrame))throw new TypeError("videoFrame must be a VideoFrame.");this._encoder.digest(i)}_flush(){return this._encoder.flush()}},Ae=class extends _{constructor(i,e){if(!(i instanceof HTMLCanvasElement))throw new TypeError("canvas must be an HTMLCanvasElement.");super(e.codec),this._encoder=new ne(this,e),this._canvas=i}digest(i,e=0){if(!Number.isFinite(i)||i<0)throw new TypeError("timestamp must be a non-negative number.");if(!Number.isFinite(e)||e<0)throw new TypeError("duration must be a non-negative number.");let r=new VideoFrame(this._canvas,{timestamp:Math.round(1e6*i),duration:Math.round(1e6*e),alpha:"discard"});this._encoder.digest(r),r.close()}_flush(){return this._encoder.flush()}},_e=class extends _{constructor(e,r){if(!(e instanceof MediaStreamTrack)||e.kind!=="video")throw new TypeError("track must be a video MediaStreamTrack.");r={...r,latencyMode:"realtime"};super(r.codec);this._abortController=null;this._offsetTimestamps=!0;this._encoder=new ne(this,r),this._track=e}_start(){this._abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this._track}),r=new WritableStream({write:s=>{this._encoder.digest(s),s.close()}});e.readable.pipeTo(r,{signal:this._abortController.signal}).catch(s=>{s instanceof DOMException&&s.name==="AbortError"||console.error("Pipe error:",s)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},E=class extends W{constructor(e){super();this._connectedTrack=null;if(!Y.includes(e))throw new TypeError(`Invalid audio codec '${e}'. Must be one of: ${Y.join(", ")}.`);this._codec=e}},Ee=class extends E{constructor(i){super(i)}digest(i,e){if(!(i instanceof EncodedAudioChunk))throw new TypeError("chunk must be an EncodedAudioChunk.");this._ensureValidDigest(),this._connectedTrack?.output._muxer.addEncodedAudioChunk(this._connectedTrack,i,e)}},wr=t=>{if(!t||typeof t!="object")throw new TypeError("Codec config must be an object.");if(!Y.includes(t.codec))throw new TypeError(`Invalid audio codec '${t.codec}'. Must be one of: ${Y.join(", ")}.`);if(!Number.isInteger(t.bitrate)||t.bitrate<=0)throw new TypeError("config.bitrate must be a positive integer.")},ae=class{constructor(i,e){this.source=i;this.codecConfig=e;this.encoder=null;this.lastNumberOfChannels=null;this.lastSampleRate=null;wr(e)}digest(i){if(this.source._ensureValidDigest(),this.lastNumberOfChannels!==null&&this.lastSampleRate!==null){if(i.numberOfChannels!==this.lastNumberOfChannels||i.sampleRate!==this.lastSampleRate)throw new Error(`Audio parameters must remain constant. Expected ${this.lastNumberOfChannels} channels at ${this.lastSampleRate} Hz, got ${i.numberOfChannels} channels at ${i.sampleRate} Hz.`)}else this.lastNumberOfChannels=i.numberOfChannels,this.lastSampleRate=i.sampleRate;this.ensureEncoder(i),c(this.encoder),this.encoder.encode(i)}ensureEncoder(i){this.encoder||(this.encoder=new AudioEncoder({output:(e,r)=>this.source._connectedTrack?.output._muxer.addEncodedAudioChunk(this.source._connectedTrack,e,r),error:e=>console.error("Audio encode error:",e)}),this.encoder.configure({codec:ot(this.codecConfig.codec,i.numberOfChannels,i.sampleRate),numberOfChannels:i.numberOfChannels,sampleRate:i.sampleRate,bitrate:this.codecConfig.bitrate}))}async flush(){return this.encoder?.flush()}},Oe=class extends E{constructor(i){super(i.codec),this._encoder=new ae(this,i)}digest(i){if(!(i instanceof AudioData))throw new TypeError("audioData must be an AudioData.");this._encoder.digest(i)}_flush(){return this._encoder.flush()}},Ve=class extends E{constructor(e){super(e.codec);this._accumulatedFrameCount=0;this._encoder=new ae(this,e)}digest(e){if(!(e instanceof AudioBuffer))throw new TypeError("audioBuffer must be an AudioBuffer.");let r=e.numberOfChannels,s=e.sampleRate,o=e.length,n=new Float32Array(r*o);for(let u=0;u<r;u++){let d=e.getChannelData(u);n.set(d,u*o)}let a=new AudioData({format:"f32-planar",sampleRate:s,numberOfFrames:o,numberOfChannels:r,timestamp:Math.round(1e6*this._accumulatedFrameCount/s),data:n});this._encoder.digest(a),a.close(),this._accumulatedFrameCount+=o}_flush(){return this._encoder.flush()}},Me=class extends E{constructor(e,r){if(!(e instanceof MediaStreamTrack)||e.kind!=="audio")throw new TypeError("track must be an audio MediaStreamTrack.");super(r.codec);this._abortController=null;this._offsetTimestamps=!0;this._encoder=new ae(this,r),this._track=e}_start(){this._abortController=new AbortController;let e=new MediaStreamTrackProcessor({track:this._track}),r=new WritableStream({write:s=>{this._encoder.digest(s),s.close()}});e.readable.pipeTo(r,{signal:this._abortController.signal}).catch(s=>{s instanceof DOMException&&s.name==="AbortError"||console.error("Pipe error:",s)})}async _flush(){this._abortController&&(this._abortController.abort(),this._abortController=null),await this._encoder.flush()}},R=class extends W{constructor(e){super();this._connectedTrack=null;if(!Se.includes(e))throw new TypeError(`Invalid subtitle codec '${e}'. Must be one of: ${Se.join(", ")}.`);this._codec=e}},Ie=class extends R{constructor(i){super(i),this._parser=new le({codec:i,output:(e,r)=>this._connectedTrack?.output._muxer.addSubtitleCue(this._connectedTrack,e,r),error:e=>console.error("Subtitle parse error:",e)})}digest(i){if(typeof i!="string")throw new TypeError("text must be a string.");this._ensureValidDigest(),this._parser.parse(i)}};var ze=class{constructor(i){this._tracks=[];this._started=!1;this._finalizing=!1;if(!i||typeof i!="object")throw new TypeError("options must be an object.");if(!(i.format instanceof M))throw new TypeError("options.format must be an OutputFormat.");if(!(i.target instanceof O))throw new TypeError("options.target must be a Target.");if(i.target.output)throw new Error("Target is already used for another output.");i.target.output=this,this._writer=i.target._createWriter(),this._muxer=i.format._createMuxer(this)}addVideoTrack(i,e={}){if(!(i instanceof _))throw new TypeError("source must be a VideoSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");if(typeof e.rotation=="number"&&![0,90,180,270].includes(e.rotation))throw new TypeError(`Invalid video rotation: ${e.rotation}. Has to be 0, 90, 180 or 270.`);if(Array.isArray(e.rotation)&&(e.rotation.length!==9||e.rotation.some(r=>!Number.isFinite(r))))throw new TypeError(`Invalid video transformation matrix: ${e.rotation.join()}`);if(e.frameRate!==void 0&&(!Number.isInteger(e.frameRate)||e.frameRate<=0))throw new TypeError(`Invalid video frame rate: ${e.frameRate}. Must be a positive integer.`);this._addTrack("video",i,e)}addAudioTrack(i,e={}){if(!(i instanceof E))throw new TypeError("source must be an AudioSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("audio",i,e)}addSubtitleTrack(i,e={}){if(!(i instanceof R))throw new TypeError("source must be a SubtitleSource.");if(!e||typeof e!="object")throw new TypeError("metadata must be an object.");this._addTrack("subtitle",i,e)}_addTrack(i,e,r){if(this._started)throw new Error("Cannot add track after output has started.");if(e._connectedTrack)throw new Error("Source is already used for a track.");let s={id:this._tracks.length+1,output:this,type:i,source:e,metadata:r};this._muxer.beforeTrackAdd(s),this._tracks.push(s),e._connectedTrack=s}start(){if(this._started)throw new Error("Output already started.");this._started=!0,this._muxer.start();for(let i of this._tracks)i.source._start()}async finalize(){if(this._finalizing)throw new Error("Cannot call finalize twice.");this._finalizing=!0;let i=this._tracks.map(e=>e.source._flush());await Promise.all(i),this._muxer.finalize(),this._writer.flush(),this._writer.finalize()}};return ht(yr);})();
if (typeof module === "object" && typeof module.exports === "object") Object.assign(module.exports, Metamuxer)