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  • How to implement FFMPEG retry logic [closed]

    18 mars, par M9A

    I am recording a live stream using the following code:

    ffmpeg -i  -c copy output.mp4

    This works fine for occasions where the stream is segmented in the sense that it will retry if the stream drops. However if the url no longer exists or returns a code such as 403, it will still retry, resulting in an infinite loop of retrying when the stream doesnt exist.

    How can I retry for segments but maybe retry only a few times for page errors?

  • Loading a larger file with ffmpeg crashes on safari mobile

    17 mars, par developer1

    My use case is to extract audio from video file to minimize the size of sent file over network. Everything works fine on a computer (chrome, safari) but it's either stuck or crashes on ios safari. AFAIK it crashes not while executing the ffmpeg command, but while trying to load the input file, which is quite big (500MB+).

    I load the ffmpeg like this:

      const baseURL = "https://unpkg.com/@ffmpeg/core-mt@0.12.6/dist/esm";
  await ffmpeg.load({
    coreURL: await toBlobURL(`${baseURL}/ffmpeg-core.js`, "text/javascript"),
    wasmURL: await toBlobURL(`${baseURL}/ffmpeg-core.wasm`, "application/wasm"),
    workerURL: await toBlobURL(
      `${baseURL}/ffmpeg-core.worker.js`,
      "text/javascript"
    ),
  });

    And I try to load the file like this:

    await ffmpeg.writeFile(inputFileName, await fetchFile(file));

    But it does not go past this step. How can I work around this limitation? Is there any other way to load larger files?

    Thank you.

  • Convert .flac to .mp3 with ffmpeg, keeping all metadata

    17 mars, par Vito Gentile

    How can I convert .flac to .mp3 with ffmpeg, keeping all metadata (that is converting Vorbis comment in .flac files to ID3v2 metadata of .mp3)?

  • FFMPEG : Invalid data found when processing input

    16 mars, par Schüler

    I am unable to upload mp3 or mp4 is there any specific path format? Here is my code. I have tried this also ffmpeg -i Video/" + Name + " -ss 01:30 -r 1 -an -vframes 1 -f mjpeg Video/" + Name + ".jpg

    exec("ffmpeg -y -i Video/" + Name + " -map_metadata -1 -ab 192k Video/" + Name + ".jpg", function(err) {
            if (err) {console.log(err)}
        console.log('Done', {'Image' : 'Video/' + Name + '.jpg'});
        });

    Here is the error 

    { Error: Command failed: ffmpeg -y -i Video/ac9358e25dd41a69e95a72d3e71e4881 -map_metadata -1 -ab 192k Video/ac9358e25dd41a69e95a72d3e71e4881.jpg
ffmpeg version 4.1.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8.2.1 (GCC) 20190212
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
Video/ac9358e25dd41a69e95a72d3e71e4881: Invalid data found when processing input

    at ChildProcess.exithandler (child_process.js:275:12)
    at emitTwo (events.js:126:13)
    at ChildProcess.emit (events.js:214:7)
    at maybeClose (internal/child_process.js:925:16)
    at Socket.stream.socket.on (internal/child_process.js:346:11)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at Pipe._handle.close [as _onclose] (net.js:557:12)
  killed: false,
  code: 1,
  signal: null,
  cmd: 'ffmpeg -y -i Video/ac9358e25dd41a69e95a72d3e71e4881 -map_metadata -1 -ab 192k Video/ac9358e25dd41a69e95a72d3e71e4881.jpg' }

  • ffmpeg produces different file sizes between MacOS and Linux [closed]

    16 mars, par kojow7

    I have several .wav files. When I use ffmpeg to convert to m4a, it produces different file sizes between the two systems.

    Example:

    original.wav (on MacOS) - 418004 bytes original.wav (on Linux) - 418004 bytes

    Method 1:

    for f in *.wav; do ffmpeg -i "$f" -c:a aac -b:a 96k "${f%.wav}.m4a"; done

    MacOS - 18408 bytes Linux - 15814 bytes

    Method 2:

    for f in *.wav; do ffmpeg -i "$f" -c:a aac -b:a 192k "${f%.wav}.m4a"; done

    MacOs - 36428 bytes Linux - 26060 bytes

    Method 3:

    for f in *.wav; do ffmpeg -i "$f" -c:a aac "${f%.wav}.m4a"; done

    MacOS - 24168 bytes Linux - 19765 bytes

    As you notice, the Linux examples are quite smaller than the MacOS examples.

    What is going on here that would make the difference? Is it a different AAC codec being used in both cases or is it the ffmpeg version? If so, what would the versions be doing differently here?

    On my Mac, it appears I am using ffmpeg version 7.1.1 On Linux, it appears I am using ffmpeg version 4.3.8-0+deb11u3

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