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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| /* global log, streamWriter */ | ||
|
|
||
| /** | ||
| * Save the video track to disk. | ||
| * @param {MediaStreamTrack} videoTrack | ||
| */ | ||
| window.saveVideoTrack = async (videoTrack, sendrecv, quality = 0.75) => { | ||
| const width = window.VIDEO_WIDTH | ||
| const height = window.VIDEO_HEIGHT | ||
| const frameRate = window.VIDEO_FRAMERATE | ||
| const fname = `${window.getParticipantName().split('_')[0]}-${sendrecv}_${ | ||
| videoTrack.id | ||
| }.ivf` | ||
| log(`saveVideoTrack ${fname} ${width}x${height} ${frameRate}fps`) | ||
| const writer = await streamWriter(fname, width, height, frameRate, 'MJPG') | ||
|
|
||
| const canvas = new OffscreenCanvas(width, height) | ||
| const ctx = canvas.getContext('2d') | ||
| let startTimestamp = -1 | ||
| const writableStream = new window.WritableStream( | ||
| { | ||
| async write(videoFrame) { | ||
| const { timestamp, codedWidth, codedHeight } = videoFrame | ||
| if (!codedWidth || !codedHeight) { | ||
| return | ||
| } | ||
| const bitmap = await createImageBitmap(videoFrame) | ||
| try { | ||
| ctx.drawImage(bitmap, 0, 0, width, height) | ||
| const blob = await canvas.convertToBlob({ | ||
| type: 'image/jpeg', | ||
| quality, | ||
| }) | ||
| const data = await blob.arrayBuffer() | ||
| if (startTimestamp < 0) { | ||
| startTimestamp = timestamp | ||
| } | ||
| const pts = Math.round( | ||
| (frameRate * (timestamp - startTimestamp)) / 1000000, | ||
| ) | ||
| /* log( | ||
| `writer ${data.byteLength} bytes timestamp=${ | ||
| videoFrame.timestamp / 1000000 | ||
| } pts=${pts}`, | ||
| ) */ | ||
| writer.write(data, pts) | ||
| } catch (err) { | ||
| log(`saveVideoTrack error: ${err.message}`) | ||
| } | ||
| videoFrame.close() | ||
| bitmap.close() | ||
| }, | ||
| close() { | ||
| writer.close() | ||
| }, | ||
| abort(err) { | ||
| log('saveVideoTrack error:', err) | ||
| }, | ||
| }, | ||
| new CountQueuingStrategy({ highWaterMark: frameRate * 2 }), | ||
| ) | ||
|
|
||
| const trackProcessor = new window.MediaStreamTrackProcessor({ | ||
| track: videoTrack, | ||
| }) | ||
| trackProcessor.readable.pipeTo(writableStream) | ||
| } | ||
|
|
||
| /** | ||
| * Save the audio track to disk. | ||
| * @param {MediaStreamTrack} audioTrack | ||
| */ | ||
| window.saveAudioTrack = async (audioTrack, sendrecv) => { | ||
| const fname = `${window.getParticipantName().split('_')[0]}-${sendrecv}_${ | ||
| audioTrack.id | ||
| }.f32le.raw` | ||
| log(`saveAudioTrack ${fname}`) | ||
| const writer = await streamWriter(fname) | ||
|
|
||
| const writableStream = new window.WritableStream( | ||
| { | ||
| async write(frame) { | ||
| const { numberOfFrames } = frame | ||
| try { | ||
| const data = new Float32Array(numberOfFrames) | ||
| frame.copyTo(data, { planeIndex: 0 }) | ||
| writer.write(data) | ||
| } catch (err) { | ||
| log(`saveAudioTrack error: ${err.message}`) | ||
| } | ||
| frame.close() | ||
| }, | ||
| close() { | ||
| writer.close() | ||
| }, | ||
| abort(err) { | ||
| log('saveAudioTrack error:', err) | ||
| }, | ||
| }, | ||
| new CountQueuingStrategy({ highWaterMark: 100 }), | ||
| ) | ||
|
|
||
| const trackProcessor = new window.MediaStreamTrackProcessor({ | ||
| track: audioTrack, | ||
| }) | ||
| trackProcessor.readable.pipeTo(writableStream) | ||
| } |
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