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• avcodec/mm : decode raw chunk type and skip unknown audio chunk type

  8 juin 2024, par Peter Ross

  avcodec/mm : decode raw chunk type and skip unknown audio chunk type
  

  • [DH] libavcodec/mmvideo.c
  • [DH] libavformat/mm.c

• Unknown encoder 'h264_videotoolbox'

  11 septembre 2024, par Ahsanur Rahman

  I'm facing an issue with FFmpeg on my iOS app. When I use the mobile-ffmpeg-full-gpl pod, hardware-accelerated video encoding with h264_videotoolbox works perfectly. But, when I try to use a prebuilt FFmpeg binary, I receive the following error :

  


  Unknown encoder 'h264_videotoolbox'

  


  I have created a build script to compile FFmpeg for iOS with VideoToolbox support. Here’s a portion of my configure command :

  


  ./configure \
  --cross-prefix="${HOST}-" \
  --sysroot="${SDK_PATH}" \
  --prefix="${FFMPEG_LIBRARY_PATH}" \
  --pkg-config="${HOST_PKG_CONFIG_PATH}" \
  --arch="${TARGET_ARCH}" \
  --cpu="${TARGET_CPU}" \
  --target-os=darwin \
  ${ASM_OPTIONS} \
  --ar="${AR}" \
  --cc="${CC}" \
  --cxx="${CXX}" \
  --as="${AS}" \
  --ranlib="${RANLIB}" \
  --strip="${STRIP}" \
  --nm="${NM}" \
  --extra-ldflags="$(get_min_version_cflags)" \
  --disable-autodetect \
  ${BUILD_LIBRARY_OPTIONS} \
  ${SIZE_OPTIONS} \
  --disable-xmm-clobber-test \
  ${DEBUG_OPTIONS} \
  --disable-neon-clobber-test \
  --enable-version3 \
  --enable-gpl \
  --enable-nonfree \
  --enable-pic \
  --enable-static \
  --enable-videotoolbox \
  --enable-decoders \
  --enable-encoders \
  --enable-muxers \
  --enable-demuxers \
  --enable-parsers \
  --enable-protocols \
  --enable-filters \
  --enable-libx264 \
  --enable-libx265 \
  --enable-libvpx \
  --enable-libvorbis \
  --enable-libmp3lame \
  --enable-libopus \
  --enable-hwaccels \
  --enable-decoder=h264_videotoolbox \
  --enable-encoder=h264_videotoolbox \
  --enable-encoder=hevc_videotoolbox \
  ${CONFIGURE_POSTFIX} 1>>"${BASEDIR}"/build.log 2>&1


  


  I use the following command to execute in FFmpeg :

  


  let command: [String] = [
    "-y",
    "-hide_banner",
    "-i", inputPath,
    "-c:v", "h264_videotoolbox",
    "-vf", "scale=1080:1920",
    "-acodec", "aac",
    outputPath
]


  


  What might be missing in my build configuration to cause h264_videotoolbox to be unrecognized ? Are there any specific steps to ensure that the VideoToolbox encoder is enabled properly in a prebuilt FFmpeg binary for iOS ?

  


  Any suggestions on solving this issue would be appreciated !

  


• Fluent FFmpeg Thumbnail Extraction Error : "muxing overhead : unknown, conversion failed"

  21 août 2024, par Abdul Hannan Mahmood

  I'm trying to extract a thumbnail from a video using Fluent FFmpeg, but I'm encountering the error "muxing overhead : unknown, conversion failed." Despite this error, the thumbnail is being generated correctly.

  


  Here's my code :

  


  const screenshotPath = resolve(`${output}/${videoId}_thumbnail.png`);
ffmpeg(inputUrl)
  .screenshots({
    timestamps: [timestamp],
    filename: screenshotPath,
    size: '640x360'
  })
  .output(screenshotPath)
  .on('error', (err) => {
    log.error(`VideoId:${videoId} -> Error while extracting screenshot`, err);
  });


  


  I've already verified the following :

  


  

  • Input file integrity : The input video file is not corrupted.

  


  • Supported formats : The video format is compatible with Fluent FFmpeg.

  


  • System resources : My system has sufficient resources for the conversion.

  


  • Conversion tool : I'm using the latest version of Fluent FFmpeg.

  


  


  Despite these checks, the error persists. I'm wondering if this is a known issue or if there's something else I might be missing.