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• FFmpeg matlab error : At least one output file must be specified ? [closed]

  3 mars, par as moh

  I'm trying to get I frames from a video using Matlab using this command system(sprintf('ffmpeg -i testVid.mp4 -vf "select=eq(pict_type\,I)" -vsync vfr output_%03d.png')); ,but i get this message

  


   ffmpeg version 7.1-full_build-www.gyan.dev Copyright (c) 2000-2024 the FFmpeg developers 
  built with gcc 14.2.0 (Rev1, Built by MSYS2 project) 
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libopenjpeg --enable-libquirc --enable-libuavs3d --enable-libxevd --enable-libzvbi --enable-libqrencode --enable-librav1e --enable-libsvtav1 --enable-libvvenc --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxeve --enable-libxvid --enable-libaom --enable-libjxl --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-dxva2 --enable-d3d11va --enable-d3d12va --enable-ffnvcodec --enable-libvpl --enable-nvdec --enable-nvenc --enable-vaapi --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-liblc3 --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint 
  libavutil      59. 39.100 / 59. 39.100 
  libavcodec     61. 19.100 / 61. 19.100 
  libavformat    61.  7.100 / 61.  7.100 
  libavdevice    61.  3.100 / 61.  3.100 
  libavfilter    10.  4.100 / 10.  4.100 
  libswscale      8.  3.100 /  8.  3.100 
  libswresample   5.  3.100 /  5.  3.100 
  libpostproc    58.  3.100 / 58.  3.100 
Trailing option(s) found in the command: may be ignored. 
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'testVid.mp4': 
  Metadata: 
    major_brand     : isom 
    minor_version   : 512 
    compatible_brands: isomiso2avc1mp41 
    encoder         : Lavf57.83.100 
  Duration: 00:00:02.02, start: 0.000000, bitrate: 12798 kb/s 
  Stream #0:0[0x1](eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuvj420p(pc, progressive), 1280x720 [SAR 1:1 DAR 16:9], 12662 kb/s, 29.74 fps, 30 tbr, 90k tbn (default) 
      Metadata: 
        handler_name    : VideoHandler 
        vendor_id       : [0][0][0][0] 
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 121 kb/s (default) 
      Metadata: 
        handler_name    : SoundHandler 
        vendor_id       : [0][0][0][0] 
At least one output file must be specified 


  


  i searched and tried many cases but i don't know where is the problem, any help please ?

  


• avformat/iamf_parse : reject ambisonics mode > 1

  29 novembre 2024, par Michael Niedermayer

  avformat/iamf_parse : reject ambisonics mode > 1
  ambisonics mode > 1 does not initialize any layer but layer 0
  
  is unconditionally dereferenced
  Fixes : poc-2024-11
  
  Fixes : null pointer dereference
  
  Found-by : 苏童 <220235212@seu.edu.cn>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/iamf_parse.c

• React-Native FFmpeg-kit VideoCompress command not working

  6 septembre 2024, par Brian

  I'm Using FFmpeg-kit's React-Native Kit

  


  And I want to encode H264 to HEVC.
But the Videotoolbox in ios not working

  


  I use "ffmpeg-kit-react-native" : "^6.0.2"
And here is my Code

  


          // hevc_videotoolbox
        await FFmpegKit.execute(`-i ${videoUri} -c:v hevc_videotoolbox  -c:a aac -tag:v hvc1 -movflags +faststart -y ${outputUri}`);
      } else {
        await FFmpegKit.execute(`-i ${videoUri} -c:v hevc_omx -c:a aac -tag:v hvc1 -movflags +faststart -y ${outputUri}`);
      }


  


  But I got the error follwed like this

  


   LOG    libavutil      58.  2.100 / 58.  2.100
 LOG    libavcodec     60.  3.100 / 60.  3.100
 LOG    libavformat    60.  3.100 / 60.  3.100
 LOG    libavdevice    60.  1.100 / 60.  1.100
 LOG    libavfilter     9.  3.100 /  9.  3.100
 LOG    libswscale      7.  1.100 /  7.  1.100
 LOG    libswresample   4. 10.100 /  4. 10.100
 LOG  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 
 LOG    Metadata:
 LOG      major_brand     :
 LOG  mp42
 LOG  
 LOG      minor_version   :
 LOG  1
 LOG  
 LOG      compatible_brands:
 LOG  isommp41mp42
 LOG  
 LOG      creation_time   :
 LOG  2024-08-29T02:42:24.000000Z
 LOG  
 LOG    Duration:
 LOG  00:00:23.10
 LOG  , start:
 LOG  0.000000
 LOG  , bitrate:
 LOG  1223 kb/s
 LOG  
 LOG    Stream #0:0
 LOG  [0x1]
 LOG  (und)
 LOG  : Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 640x360 [SAR 1:1 DAR 16:9], 1220 kb/s
 LOG  ,
 LOG  30 fps,
 LOG  30 tbr,
 LOG  600 tbn
 LOG   (default)
 LOG  
 LOG      Metadata:
 LOG        creation_time   :
 LOG  2024-08-29T02:42:24.000000Z
 LOG  
 LOG        handler_name    :
 LOG  Core Media Video
 LOG  
 LOG        vendor_id       :
 LOG  [0][0][0][0]
 LOG  
 LOG  Stream mapping:
 LOG    Stream #0:0 -> #0:0
 LOG   (h264 (native) -> hevc (hevc_videotoolbox))
 LOG  
 LOG  Press [q] to stop, [?] for help
 LOG  [hevc_videotoolbox @ 0x11af89120] Error encoding frame: -12905
 LOG  [hevc_videotoolbox @ 0x11af89120] popping: -542398533
 LOG  [vost#0:0/hevc_videotoolbox @ 0x11af88e50] Error initializing output stream: Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
 LOG  Conversion failed!


  


  How can I fix this error ?

  


  I read the
stack overflow

  


  

  1. Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height

  


  


  2.https://stackoverflow.com/questions/77734601/react-native-ffmpeg-producing-unplayable-hevc-videos-that-still-have-audio

  


  But that links doesn't work for me
I want to compress video's compressing with react-native on ios and android for reducing server cost