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Sur d’autres sites (14753)

  • extract subtitle from video ffmpeg. Unrecognized option 'subs.srt'

    2 juillet 2019, par evgeni fotia
        // file.path can be like this folder1/folder2/.../folderN/filename
    
    let filename = file.path.split('.').slice(0, file.path.split('.').lenght-1).join('.')
    
    filename = filename.split('/').pop()
    
    var result = ffmpeg({
    
      MEMFS: [{name: file.path, data: buffer}],
    
      arguments: ["-i", file.path, "-map", "0:s:0", filename + "-subs.srt"],
    
      // Ignore stdin read requests.
    
      stdin: function() {},
    
    });
    
    // Write out.webm to disk.
    
    var out = result.MEMFS[0];
    
    fs.outputFile(pathname + '/' + out.name, Buffer(out.data), 'binary');

    I get the following

    ffmpeg version n3.1.2 Copyright (c) 2000-2016 the FFmpeg developers
    
  built with emcc (Emscripten gcc/clang-like replacement) 1.36.7 ()
    
  configuration: --cc=emcc --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-all --enable-ffmpeg --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-avfilter --disable-network --disable-d3d11va --disable-dxva2 --disable-vaapi --disable-vda --disable-vdpau --enable-decoder=vp8 --enable-decoder=vp9 --enable-decoder=theora --enable-decoder=mpeg2video --enable-decoder=mpeg4 --enable-decoder=h264 --enable-decoder=hevc --enable-decoder=png --enable-decoder=mjpeg --enable-decoder=vorbis --enable-decoder=opus --enable-decoder=mp3 --enable-decoder=ac3 --enable-decoder=aac --enable-decoder=ass --enable-decoder=ssa --enable-decoder=srt --enable-decoder=webvtt --enable-demuxer=matroska --enable-demuxer=ogg --enable-demuxer=avi --enable-demuxer=mov --enable-demuxer=flv --enable-demuxer=mpegps --enable-demuxer=image2 --enable-demuxer=mp3 --enable-demuxer=concat --enable-protocol=file --enable-filter=aresample --enable-filter=scale --enable-filter=crop --enable-filter=overlay --disable-bzlib --disable-iconv --disable-libxcb --disable-lzma --disable-sdl --disable-securetransport --disable-xlib --disable-zlib --enable-encoder=libvpx_vp8 --enable-encoder=libopus --enable-encoder=mjpeg --enable-muxer=webm --enable-muxer=ogg --enable-muxer=null --enable-muxer=image2 --enable-filter=subtitles --enable-libass --enable-libopus --enable-libvpx --extra-cflags=-I../libvpx/dist/include --extra-ldflags=-L../libvpx/dist/lib
    
  libavutil      55. 28.100 / 55. 28.100
    
  libavcodec     57. 48.101 / 57. 48.101
    
  libavformat    57. 41.100 / 57. 41.100
    
  libavfilter     6. 47.100 /  6. 47.100
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  1.100 /  2.  1.100
    
Unrecognized option 'subs.srt'.
    
Error splitting the argument list: Option not found

  • How to get the correct result file data if I use Web Worker on ffmpeg.js ?

    23 avril 2019, par SuperBerry

    I have tried to use FFMPEG.js (https://github.com/Kagami/ffmpeg.js) to convert mp3 files on the browser/client side, and I followed the usage of the page of Web Worker. However, the worker works well on the converting and it seems the file has been converted, but I cannot get the correct result file data back.

    Here my code is :

    <code class="echappe-js">&lt;script&gt;<br />
    
<br />
    
var stdout = &quot;&quot;;<br />
    
var outputhtml=&quot;&quot;;<br />
    
var stderr = &quot;&quot;;<br />
    
var outputfile;<br />
    
<br />
    
var sampleVideoData;<br />
    
<br />
    
function retrieveSampleVideo() {<br />
    
  var oReq = new XMLHttpRequest();<br />
    
  oReq.open(&quot;GET&quot;, &quot;short.mp3&quot;, true);<br />
    
  oReq.responseType = &quot;arraybuffer&quot;;<br />
    
<br />
    
  oReq.onload = function (oEvent) {<br />
    
    var arrayBuffer = oReq.response;<br />
    
    if (arrayBuffer) {<br />
    
      sampleVideoData = new Uint8Array(arrayBuffer);<br />
    
    }<br />
    
  };<br />
    
<br />
    
  oReq.send(null);<br />
    
}<br />
    
<br />
    
function getDownloadLink(fileData, fileName) {<br />
    
  var a = document.createElement('a');<br />
    
  a.download = fileName;<br />
    
  var blob = new Blob([fileData]);<br />
    
  var src = window.URL.createObjectURL(blob);<br />
    
  a.href = src;<br />
    
  a.textContent = 'Click here to download ' + fileName + &quot;!&quot;;<br />
    
  document.body.appendChild(a);<br />
    
}<br />
    
<br />
    
var worker = new Worker(&quot;ffmpeg-worker-mp4.js&quot;);<br />
    
<br />
    
retrieveSampleVideo();<br />
    
<br />
    
var memfs =[];  <br />
    
<br />
    
//[, {name: &quot;input.mp3&quot;, data: output}];<br />
    
<br />
    
worker.onmessage = function(e) {<br />
    
  var msg = e.data;<br />
    
<br />
    
  switch (msg.type) {<br />
    
  case &quot;ready&quot;:<br />
    
    console.log(&quot;ready: &quot; + msg.data);<br />
    
    alert(sampleVideoData.length);<br />
    
    memfs.push({name: &quot;input.mp3&quot;, data: sampleVideoData});<br />
    
    memfs.push({name: &quot;output.mp3&quot;, data: outputfile});<br />
    
<br />
    
    worker.postMessage({type: &quot;run&quot;, MEMFS: memfs, arguments: [&quot;-i&quot;, &quot;input.mp3&quot;, &quot;-y&quot;, &quot;output.mp3&quot;]});<br />
    
<br />
    
<br />
    
    break;<br />
    
  case &quot;stdout&quot;:<br />
    
    console.log(&quot;stdout: &quot; + msg.data);<br />
    
    stdout += msg.data + &quot;\n&quot;;<br />
    
    outputhtml+=msg.data + &quot;&lt;br&gt;&quot;;<br />
    
<br />
    
    break;<br />
    
  case &quot;stderr&quot;:<br />
    
    console.log(&quot;stderr: &quot; + msg.data);<br />
    
    stderr += msg.data + &quot;\n&quot;;<br />
    
    outputhtml+=msg.data + &quot;&lt;br&gt;&quot;;<br />
    
<br />
    
    break;<br />
    
<br />
    
  case &quot;exit&quot;:<br />
    
<br />
    
    console.log(&quot;Process exited with code &quot; + msg.data);<br />
    
    console.log(stdout);<br />
    
    document.write(outputhtml);<br />
    
<br />
    
    getDownloadLink(outputfile, &quot;output.mp3&quot;);<br />
    
    worker.terminate();<br />
    
<br />
    
<br />
    
    break;<br />
    
  }<br />
    
};<br />
    
<br />
    
    &lt;/script&gt;

    And the console output looks good :

    stderr: ffmpeg version n3.1.2 Copyright (c) 2000-2016 the FFmpeg developers index.html:66:4
    
stderr:   built with emcc (Emscripten gcc/clang-like replacement) 1.36.7 () index.html:66:4
    
stderr:   configuration: --cc=emcc --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-all --enable-ffmpeg --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-avfilter --disable-network --disable-d3d11va --disable-dxva2 --disable-vaapi --disable-vda --disable-vdpau --enable-decoder=vp8 --enable-decoder=vp9 --enable-decoder=theora --enable-decoder=mpeg2video --enable-decoder=mpeg4 --enable-decoder=h264 --enable-decoder=hevc --enable-decoder=png --enable-decoder=mjpeg --enable-decoder=vorbis --enable-decoder=opus --enable-decoder=mp3 --enable-decoder=ac3 --enable-decoder=aac --enable-decoder=ass --enable-decoder=ssa --enable-decoder=srt --enable-decoder=webvtt --enable-demuxer=matroska --enable-demuxer=ogg --enable-demuxer=avi --enable-demuxer=mov --enable-demuxer=flv --enable-demuxer=mpegps --enable-demuxer=image2 --enable-demuxer=mp3 --enable-demuxer=concat --enable-protocol=file --enable-filter=aresample --enable-filter=scale --enable-filter=crop --enable-filter=overlay --disable-bzlib --disable-iconv --disable-libxcb --disable-lzma --disable-sdl --disable-securetransport --disable-xlib --disable-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=-I../lame/dist/include --extra-ldflags=-L../lame/dist/lib index.html:66:4
    
stderr:   libavutil      55. 28.100 / 55. 28.100 index.html:66:4
    
stderr:   libavcodec     57. 48.101 / 57. 48.101 index.html:66:4
    
stderr:   libavformat    57. 41.100 / 57. 41.100 index.html:66:4
    
stderr:   libavfilter     6. 47.100 /  6. 47.100 index.html:66:4
    
stderr:   libswscale      4.  1.100 /  4.  1.100 index.html:66:4
    
stderr:   libswresample   2.  1.100 /  2.  1.100 index.html:66:4
    
stderr: [mp3 @ 0x812380] Warning: not compiled with thread support, using thread emulation index.html:66:4
    
stderr: Input #0, mp3, from 'input.mp3': index.html:66:4
    
stderr:   Metadata: index.html:66:4
    
stderr:     encoder         : Lavf57.66.101 index.html:66:4
    
stderr:   Duration: 00:00:03.02, start: 0.023021, bitrate: 128 kb/s index.html:66:4
    
stderr:     Stream #0:0: Audio: mp3, 48000 Hz, stereo, s16p, 128 kb/s index.html:66:4
    
stderr:     Metadata: index.html:66:4
    
stderr:       encoder         : Lavc57.75 index.html:66:4
    
stderr: [mp3 @ 0x8240f0] Warning: not compiled with thread support, using thread emulation index.html:66:4
    
stderr: [libmp3lame @ 0x81b8a0] Warning: not compiled with thread support, using thread emulation index.html:66:4
    
stderr: [mp3 @ 0x80b0f0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead. index.html:66:4
    
stderr: Output #0, mp3, to 'output.mp3': index.html:66:4
    
stderr:   Metadata: index.html:66:4
    
stderr:     TSSE            : Lavf57.41.100 index.html:66:4
    
stderr:     Stream #0:0: Audio: mp3 (libmp3lame), 48000 Hz, stereo, s16p index.html:66:4
    
stderr:     Metadata: index.html:66:4
    
stderr:       encoder         : Lavc57.48.101 libmp3lame index.html:66:4
    
stderr: Stream mapping: index.html:66:4
    
stderr:   Stream #0:0 -> #0:0 (mp3 (native) -> mp3 (libmp3lame)) index.html:66:4
    
stderr: Press [q] to stop, [?] for help index.html:66:4
    
stderr: size=      47kB time=00:00:03.00 bitrate= 129.6kbits/s speed=10.9x    index.html:66:4
    
stderr: video:0kB audio:47kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.489831% index.html:66:4
    
Process exited with code 0

    I have set the output into the memfs in the code :

    memfs.push(name : "output.mp3", data : outputfile) ;

    But I cannot get the result file data in outputfile to create the blob downloadd link.

  • SDL2.0 Alternative for SDL_Overlay

    19 juin 2019, par Josh

    So I’ve been trying to go through the following tutorial on ffmpeg : http://dranger.com/ffmpeg/tutorial02.html

    However, when I try to compile using gcc, I get the following output :

    root:/Users/mbrodeur/Downloads/HACKATHON CONTENT/Tutorials-> gcc -o tutorial02 tutorial02.c -lavutil -lavformat -lavcodec -lz -lavutil -lm -lswscale -D_THREAD_SAFE -lSDL2
    
tutorial02.c: In function ‘main’:
    
tutorial02.c:41: error: ‘SDL_Overlay’ undeclared (first use in this function)
    
tutorial02.c:41: error: (Each undeclared identifier is reported only once
    
tutorial02.c:41: error: for each function it appears in.)
    
tutorial02.c:41: error: ‘bmp’ undeclared (first use in this function)
    
tutorial02.c:98: warning: assignment makes pointer from integer without a cast
    
tutorial02.c:110: error: ‘SDL_YV12_OVERLAY’ undeclared (first use in this function)

    Now, I read that SDL_Overlay is no longer used in SDL2, so therein lies the problem. I’ve been poking around, but can’t seem to find anything helpful. Is there a replacement for SDL_Overlay ? Is it necessary ?

    SDL_Overlay is used in the following context :

    SDL_Overlay     *bmp;
    
bmp = SDL_CreateYUVOverlay(pCodecCtx->width, pCodecCtx->height,
    
                       SDL_YV12_OVERLAY, screen);

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