Update build instructions (fastcomp fix)

[nicolasdeory]

I built a custom FFMPEG following the README instructions, adding the filter setpts to the Makefile. I managed to build successfully, and I managed to create a MP4 video with only MP3 audio.

I'm using ffmpeg-worker-mp4.js.

As soon as I try to add an input image, the program exits with code 1, with not much information. Here's the console log (scriptfinal.js is the file where I handle all the FFmpeg-related stuff).

It looks like it crashes in the middle of decoding the image.

ffmpeg version n4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
scriptfinal.js:135   built with emcc (Emscripten gcc/clang-like replacement) 1.39.13
scriptfinal.js:135   configuration: --cc=emcc --ranlib=emranlib --enable-cross-compile --target-os=none --arch=x86 --disable-runtime-cpudetect --disable-asm --disable-fast-unaligned --disable-pthreads --disable-w32threads --disable-os2threads --disable-debug --disable-stripping --disable-safe-bitstream-reader --disable-all --enable-ffmpeg --enable-avcodec --enable-avformat --enable-avfilter --enable-swresample --enable-swscale --disable-network --disable-d3d11va --disable-dxva2 --disable-vaapi --disable-vdpau --enable-decoder=vp8 --enable-decoder=h264 --enable-decoder=vorbis --enable-decoder=opus --enable-decoder=mp3 --enable-decoder=aac --enable-decoder=pcm_s16le --enable-decoder=mjpeg --enable-decoder=png --enable-demuxer=matroska --enable-demuxer=ogg --enable-demuxer=mov --enable-demuxer=mp3 --enable-demuxer=wav --enable-demuxer=image2 --enable-demuxer=concat --enable-protocol=file --enable-filter=aresample --enable-filter=scale --enable-filter=crop --enable-filter=overlay --enable-filter=hstack --enable-filter=vstack --enable-filter=setpts --disable-bzlib --disable-iconv --disable-libxcb --disable-lzma --disable-sdl2 --disable-securetransport --disable-xlib --enable-zlib --enable-encoder=libx264 --enable-encoder=libmp3lame --enable-encoder=aac --enable-muxer=mp4 --enable-muxer=mp3 --enable-muxer=null --enable-gpl --enable-libmp3lame --enable-libx264 --extra-cflags='-s USE_ZLIB=1 -I../lame/dist/include' --extra-ldflags=-L../lame/dist/lib
scriptfinal.js:135   libavutil      56. 31.100 / 56. 31.100
scriptfinal.js:135   libavcodec     58. 54.100 / 58. 54.100
scriptfinal.js:135   libavformat    58. 29.100 / 58. 29.100
scriptfinal.js:135   libavfilter     7. 57.100 /  7. 57.100
scriptfinal.js:135   libswscale      5.  5.100 /  5.  5.100
scriptfinal.js:135   libswresample   3.  5.100 /  3.  5.100
scriptfinal.js:135 Splitting the commandline.
scriptfinal.js:135 Reading option '-i' ... matched as input url with argument 'audio.mp3'.
scriptfinal.js:135 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'png'.
scriptfinal.js:135 Reading option '-i' ... matched as input url with argument 'img0.png'.
scriptfinal.js:135 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'png'.
scriptfinal.js:135 Reading option '-i' ... matched as input url with argument 'img1.png'.
scriptfinal.js:135 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'png'.
scriptfinal.js:135 Reading option '-i' ... matched as input url with argument 'img2.png'.
scriptfinal.js:135 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'png'.
scriptfinal.js:135 Reading option '-i' ... matched as input url with argument 'img3.png'.
scriptfinal.js:135 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'png'.
scriptfinal.js:135 Reading option '-i' ... matched as input url with argument 'img4.png'.
scriptfinal.js:135 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'png'.
scriptfinal.js:135 Reading option '-i' ... matched as input url with argument 'img5.png'.
scriptfinal.js:135 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'mjpeg'.
scriptfinal.js:135 Reading option '-i' ... matched as input url with argument 'img6.jpeg'.
scriptfinal.js:135 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'mjpeg'.
scriptfinal.js:135 Reading option '-i' ... matched as input url with argument 'img7.jpg'.
scriptfinal.js:135 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'mjpeg'.
scriptfinal.js:135 Reading option '-i' ... matched as input url with argument 'img8.jpg'.
scriptfinal.js:135 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'mjpeg'.
scriptfinal.js:135 Reading option '-i' ... matched as input url with argument 'img9.jpg'.
scriptfinal.js:135 Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'trace'.
scriptfinal.js:135 Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'libx264'.
scriptfinal.js:135 Reading option '-t' ... matched as option 't' (record or transcode "duration" seconds of audio/video) with argument '15'.
scriptfinal.js:135 Reading option '-pix_fmt' ... matched as option 'pix_fmt' (set pixel format) with argument 'yuv420p'.
scriptfinal.js:135 Reading option 'out.mp4' ... matched as output url.
scriptfinal.js:135 Finished splitting the commandline.
scriptfinal.js:135 Parsing a group of options: global .
scriptfinal.js:135 Applying option loglevel (set logging level) with argument trace.
scriptfinal.js:135 Successfully parsed a group of options.
scriptfinal.js:135 Parsing a group of options: input url audio.mp3.
scriptfinal.js:135 Successfully parsed a group of options.
scriptfinal.js:135 Opening an input file: audio.mp3.
scriptfinal.js:135 [NULL @ 0x739470] Opening 'audio.mp3' for reading
scriptfinal.js:135 [file @ 0x739b20] Setting default whitelist 'file,crypto'
scriptfinal.js:135 Probing mp3 score:1 size:1956
scriptfinal.js:135 Probing mp3 score:25 size:4004
scriptfinal.js:135 Probing mp3 score:51 size:8100
scriptfinal.js:135 [mp3 @ 0x739470] Format mp3 probed with size=8192 and score=51
scriptfinal.js:135 id3v2 ver:3 flags:00 len:82
scriptfinal.js:135 [mp3 @ 0x739470] pad 576 0
scriptfinal.js:135 [mp3 @ 0x739470] Skipping 0 bytes of junk at 668.
scriptfinal.js:135 [mp3 @ 0x739470] Before avformat_find_stream_info() pos: 668 bytes read:32768 seeks:0 nb_streams:1
scriptfinal.js:135 [mp3 @ 0x742560] Warning: not compiled with thread support, using thread emulation
scriptfinal.js:135 [mp3 @ 0x739470] demuxer injecting skip 1105 / discard 0
scriptfinal.js:135 [mp3 @ 0x742560] skip 1105 / discard 0 samples due to side data
scriptfinal.js:135 [mp3 @ 0x742560] skip 1105/1152 samples
scriptfinal.js:135 [mp3 @ 0x739470] All info found
scriptfinal.js:135 [mp3 @ 0x739470] stream 0: start_time: 0.023 duration: 292.800
scriptfinal.js:135 [mp3 @ 0x739470] format: start_time: 0.023 duration: 292.800 bitrate=192 kb/s
scriptfinal.js:135 [mp3 @ 0x739470] After avformat_find_stream_info() pos: 30364 bytes read:32768 seeks:0 frames:50
scriptfinal.js:135 Input #0, mp3, from 'audio.mp3':
scriptfinal.js:135   Metadata:
scriptfinal.js:135     title           : ABBA - Gimme, Gimme, Gimme! (video)
scriptfinal.js:135     encoder         : Lavf56.40.101
scriptfinal.js:135   Duration: 00:04:52.80, start: 0.023021, bitrate: 192 kb/s
scriptfinal.js:135     Stream #0:0, 50, 1/14112000: Audio: mp3, 48000 Hz, stereo, s16p, 192 kb/s
scriptfinal.js:135     Metadata:
scriptfinal.js:135       encoder         : Lavc56.60
scriptfinal.js:135 Successfully opened the file.
scriptfinal.js:135 Parsing a group of options: input url img0.png.
scriptfinal.js:135 Applying option vcodec (force video codec ('copy' to copy stream)) with argument png.
scriptfinal.js:135 Successfully parsed a group of options.
scriptfinal.js:135 Opening an input file: img0.png.
scriptfinal.js:135 [NULL @ 0x742b10] Opening 'img0.png' for reading
scriptfinal.js:135 [file @ 0x743358] Setting default whitelist 'file,crypto'
scriptfinal.js:135 Probing image2 score:50 size:2048
scriptfinal.js:135 [image2 @ 0x742b10] Format image2 probed with size=2048 and score=50
scriptfinal.js:135 [image2 @ 0x742b10] Before avformat_find_stream_info() pos: 0 bytes read:32768 seeks:0 nb_streams:1
scriptfinal.js:135 [png @ 0x7440c0] Warning: not compiled with thread support, using thread emulation
scriptfinal.js:135 [image2 @ 0x742b10] stream 0: start_time: 0.000 duration: 0.040
scriptfinal.js:135 [image2 @ 0x742b10] format: start_time: 0.000 duration: 0.040 bitrate=25047 kb/s
scriptfinal.js:135 [image2 @ 0x742b10] After avformat_find_stream_info() pos: 125239 bytes read:125239 seeks:0 frames:1
scriptfinal.js:135 Input #1, image2, from 'img0.png':
scriptfinal.js:135   Duration: 00:00:00.04, start: 0.000000, bitrate: 25047 kb/s
scriptfinal.js:135 exception thrown: TypeError: ta is not a function,TypeError: ta is not a function
    at Pta (http://localhost:8887/ffmpeg-worker-mp4.js:123:21454)
    at Zu (http://localhost:8887/ffmpeg-worker-mp4.js:31:244690)
    at cq (http://localhost:8887/ffmpeg-worker-mp4.js:47:272977)
    at Array.$M (http://localhost:8887/ffmpeg-worker-mp4.js:27:2115470)
    at Wu (http://localhost:8887/ffmpeg-worker-mp4.js:55:101518)
    at o_ (http://localhost:8887/ffmpeg-worker-mp4.js:79:146961)
    at kpa (http://localhost:8887/ffmpeg-worker-mp4.js:55:75222)
    at b (http://localhost:8887/ffmpeg-worker-mp4.js:14:336)
    at Ua (http://localhost:8887/ffmpeg-worker-mp4.js:15:358)
    at cb (http://localhost:8887/ffmpeg-worker-mp4.js:233:71)
scriptfinal.js:135     Stream #1:0, 1, 1/25: Video: png, 1 reference frame, rgba(pc), 738x720, 0/1, 
ffmpeg-worker-mp4.js:16 Uncaught Ta {name: "ExitStatus", message: "Program terminated with exit(1)", status: 1}

[nicolasdeory]

I added the logs generated by -loglevel trace

[Kagami]

Try with git revert 73288393805b91f481e1ac5dc123825947bfd1bf I've added changes to use fastcomp backend but haven't updated instructions yet.

[nicolasdeory]

Will try that. On another note, I'm unfamiliar with the build workflow with Make. Is there any way to clean a build, or rebuild after changing the makefile? If I remove the js files and rerun make, that certainly doesn't work.

[nicolasdeory]

Reverting to that commit did the trick.

[Kagami]

Is there any way to clean a build, or rebuild after changing the makefile?

make clean

[pucelle]

Same issue +1.

[pucelle]

By the way, after I reverted the commit, the script I build will never trigger "done" event, only trigger "exit".

[pucelle]

I found the reason, It trigger an "exit" event with data "0" before "done" event... But I terminal the worker after meet "exit" event.