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Vanilagy / webm-muxer

WebM multiplexer in pure TypeScript with support for WebCodecs API, video & audio.
https://vanilagy.github.io/webm-muxer/demo
MIT License
197 stars 12 forks source link

Streaming support #16

Closed happylinks closed 1 year ago

happylinks commented 1 year ago

Added support for streaming webm where we never write "in the past".

Verified the files with mkvinfo and ffprobe:

MKVInfo

``` + EBML head |+ EBML version: 1 |+ EBML read version: 1 |+ Maximum EBML ID length: 4 |+ Maximum EBML size length: 8 |+ Document type: webm |+ Document type version: 2 |+ Document type read version: 2 + Segment: size unknown |+ Segment information | + Timestamp scale: 1000000 | + Multiplexing application: https://github.com/Vanilagy/webm-muxer | + Writing application: https://github.com/Vanilagy/webm-muxer |+ Tracks | + Track | + Track number: 1 (track ID for mkvmerge & mkvextract: 0) | + Track UID: 1 | + Track type: video | + Codec ID: V_VP9 | + Default duration: 00:00:00.033333333 (30.000 frames/fields per second for a video track) | + Video track | + Pixel width: 640 | + Pixel height: 480 | + Video color information | + Color matrix coefficients: 1 | + Color transfer: 13 | + Color primaries: 1 | + Color range: 1 | + Track | + Track number: 2 (track ID for mkvmerge & mkvextract: 1) | + Track UID: 2 | + Track type: audio | + Codec ID: A_OPUS | + Codec's private data: size 19 | + Audio track | + Sampling frequency: 48000 | + Channels: 1 |+ Cluster | + Cluster timestamp: 00:00:00.000000000 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:00.000000000 | + Frame with size 3 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:00.000000000 | + Frame with size 235 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:00.020000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:00.033000000 | + Frame with size 30 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:00.040000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:00.060000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:00.066000000 | + Frame with size 28 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:00.080000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:00.100000000 | + Frame with size 3 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:00.100000000 | + Frame with size 46424 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:00.120000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:00.133000000 | + Frame with size 3951 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:00.140000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:00.160000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:00.166000000 | + Frame with size 3994 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:00.180000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:00.200000000 | + Frame with size 3 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:00.200000000 | + Frame with size 54341 | + Simple block: key, track number 2, 1 frame(s), 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size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:05.937000000 | + Frame with size 1002 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:05.940000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:05.960000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:05.970000000 | + Frame with size 3426 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:05.980000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.000000000 | + Frame with size 3 |+ Cluster | + Cluster timestamp: 00:00:06.003000000 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:06.003000000 | + Frame with size 85543 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.020000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.037000000 | + Frame with size 2552 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.040000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.060000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.070000000 | + Frame with size 2926 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.080000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.100000000 | + Frame with size 3 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:06.103000000 | + Frame with size 84126 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.120000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.137000000 | + Frame with size 1695 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.140000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.160000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.170000000 | + Frame with size 2451 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.180000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.200000000 | + Frame with size 3 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:06.204000000 | + Frame with size 83531 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.220000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.237000000 | + Frame with size 2701 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.240000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.260000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.270000000 | + Frame with size 2419 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.280000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.300000000 | + Frame with size 3 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:06.304000000 | + Frame with size 81626 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.320000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.337000000 | + Frame with size 28934 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.340000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.360000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.370000000 | + Frame with size 2047 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.380000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.400000000 | + Frame with size 3 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:06.404000000 | + Frame with size 82236 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.420000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.437000000 | + Frame with size 1700 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.440000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.460000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.470000000 | + Frame with size 1460 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.480000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.500000000 | + Frame with size 3 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:06.504000000 | + Frame with size 83933 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.520000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.537000000 | + Frame with size 329 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.540000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.560000000 | + Frame with size 234 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.570000000 | + Frame with size 1578 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.580000000 | + Frame with size 169 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.600000000 | + Frame with size 93 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:06.604000000 | + Frame with size 85338 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.620000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.637000000 | + Frame with size 2162 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.640000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.660000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.670000000 | + Frame with size 26669 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.680000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.700000000 | + Frame with size 3 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:06.704000000 | + Frame with size 84496 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.720000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.737000000 | + Frame with size 4765 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.740000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.760000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.771000000 | + Frame with size 2460 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.780000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.800000000 | + Frame with size 3 | + Simple block: key, track number 1, 1 frame(s), timestamp 00:00:06.804000000 | + Frame with size 84018 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.820000000 | + Frame with size 3 | + Simple block: track number 1, 1 frame(s), timestamp 00:00:06.837000000 | + Frame with size 1290 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.840000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.860000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.880000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.900000000 | + Frame with size 3 | + Simple block: key, track number 2, 1 frame(s), timestamp 00:00:06.920000000 | + Frame with size 3 |+ Cues (subentries will be skipped) Statistics for track number 1: number of blocks: 206; size in bytes: 6065416; duration in seconds: 6.870333333; approximate bitrate in bits/second: 7062732 Statistics for track number 2: number of blocks: 347; size in bytes: 4354; duration in seconds: 6.92; approximate bitrate in bits/second: 5033 ```

FFProbe

``` ffprobe version 5.1.2 Copyright (c) 2007-2022 the FFmpeg developers built with Apple clang version 14.0.0 (clang-1400.0.29.202) configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/5.1.2_6 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-neon libavutil 57. 28.100 / 57. 28.100 libavcodec 59. 37.100 / 59. 37.100 libavformat 59. 27.100 / 59. 27.100 libavdevice 59. 7.100 / 59. 7.100 libavfilter 8. 44.100 / 8. 44.100 libswscale 6. 7.100 / 6. 7.100 libswresample 4. 7.100 / 4. 7.100 libpostproc 56. 6.100 / 56. 6.100 Input #0, matroska,webm, from 'picasso (45).webm': Metadata: encoder : https://github.com/Vanilagy/webm-muxer Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709/bt709/iec61966-2-1), 640x480, SAR 1:1 DAR 4:3, 30 fps, 30 tbr, 1k tbn (default) Stream #0:1(eng): Audio: opus, 48000 Hz, mono, fltp (default) ```

happylinks commented 1 year ago

Mmm, I broke something in the non-streaming code. Investigating...

happylinks commented 1 year ago

Not sure what I did wrong yet, it's not recognizing the EBML header properly for the non-streaming version:

(MKVInfo) No EBML head found. This file is probably not a Matroska file.

picasso (53).webm

Can continue investigating a bit later, any tips welcome!

Vanilagy commented 1 year ago

Looks mostly good! I've looked into the code and there a few things I'd change (and I found the fix to the bug), but honestly, I think it's faster if I just do this instead of doing a proper code review or something like that. So, I think I'll merge this in!

For the next time, remember to have ESLint running in your IDE (VSCode), as that will point out lint violations in the project. (There were just a few)

You know what would also be cool? If on the streaming demo we could somehow show the muxed WebM file in a

Vanilagy commented 1 year ago

Alright, did the fix commit! The bug was related to writing the Colour element, which in non-streaming mode didn't have a position set because you overrode the entire element (before that, I only overrode the data property on it). A change that I made is that I initialize all of the elements ahead of time, so we can get rid of some if-statements in the #createTracks logic.

Also, I replaced the code at the start of #writeSimpleBlock with:

    /** Writes an EBML SimpleBlock containing video or audio data to the file. */
    #writeSimpleBlock(chunk: InternalMediaChunk) {
        // When streaming, we create the tracks and segment after we've received the first media chunks.
        // Due to the interlacing algorithm, this code will be run once we've seen one chunk from every media track.
        if (this.#options.streaming && !this.#tracksElement) {
            this.#createTracks();
            this.#createSegment();
        }
    ...

This should be sufficient logic, so the if-statements aren't necessary anymore. Before that I think, you had a bug that this code would never run if there was only one track (I assume you always tested it with video+audio).

Vanilagy commented 1 year ago

I also updated the README docs for streaming, as well as webm-muxer.d.ts. I removed the technical explanation about how it doesn't write the size for Cluster and Segment, etc., since the user shouldn't require knowledge about the format internals to understand the docs.

happylinks commented 1 year ago

Thanks so much! Appreciate you fixing it and cleaning it up😁 I'll test it in our app in the coming week.

Vanilagy commented 1 year ago

Alright, I edited the streaming demo to stream the muxed output directly into a

Let me know if it works well for you :)

happylinks commented 1 year ago

Just tested, it works great, thanks again!