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• ffmpeg throws error when trying to remove subtitle track only when artwork is present [on hold]

  2 juillet 2014, par user226372

  Hi ffmpeg users/gurus/developers,

  I am having a peculiar problem.

  I have a media with 5 tracks (Notice the fifth one is album artwork)

  Stream #0:0(und) : Video : h264 (High)
  Stream #0:1(und) : Audio : aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 164 kb/s (default)
  Stream #0:2(und) : Audio : ac3 (ac-3 / 0x332D6361), 44100 Hz, stereo, fltp, 224 kb/s
  Stream #0:3(eng) : Subtitle : mov_text (tx3g / 0x67337874), 1280x60, 0 kb/s (default)
  Stream #0:4 : Video : mjpeg, yuvj420p(pc), 1000x1500 [SAR 1:1 DAR 2:3], 90k tbr, 90k tbn, 90k tbc

  All i am trying is to remove the subtitle track Stream #0:3(eng) : Subtitle by this command

  ffmpeg -i input.mkv -map 0:0 -map 0:1 -map 0:2 -map 0:4 -c copy output.mkv

  as explained here

  https://trac.ffmpeg.org/wiki/How%20to%20use%20-map%20option

  But i am getting this error

  Stream mapping:
  
  Stream #0:0 -> #0:0 (copy)
  
  Stream #0:1 -> #0:1 (copy)
  
  Stream #0:2 -> #0:2 (copy)
  
  Stream #0:4 -> #0:3 (copy)
  
  [ipod @ 0x103011000] Could not find tag for codec mjpeg in stream #3, codec not currently supported in container
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument

  Conversion failed !

  If the input media doesn’t contain an artwork this error is not happening

  Any ffmpeg gurus who can help me with this issue please !!!!

• c FFmpeg undefined refference error [duplicate]

  14 août 2017, par galagala

  This question already has an answer here :

  • What is an undefined reference/unresolved external symbol error and how do I fix it ?
    
    28 answers
    

  I want to write my own video player, so I am trying to use FFmpeg with C.
  I am using Ubuntu 16.04.3 LTS and compile FFmpeg following this tutorial https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

  after that I did add libavcodec.a to linker setting list and the source code path to search directory (using codeblocks)

  but my code still get error : undefined refference to "avcodec_register_all()"

  #include 
  
  #include "libavcodec/avcodec.h"
  
  int main()
  
  {
  
      avcodec_register_all();
  
      return 0;
  
  }

  after that, I search the libavcodec folder
  I did find avcodec.h and void avcodec_register_all(void) defined in it
  but I couldn’t find avcodec.c in the folder

  Is that normal ? and is that the reason why I got undefined reference error ?
  how to fix it ?

• Mpegts packet corrupt with ffmpeg concat protocol

  1er novembre 2022, par Curious Octopus

  I'm trying to use the concat protocol in ffmpeg as described in the ffmpeg docs :
https://trac.ffmpeg.org/wiki/Concatenate

  


  However I'm getting lots of errors about corrupt packets when running the concat, so I'm worried that this isn't the best approach. My actual use case will involve running unsupervised with a ton of different source videos, so I want to be sure that it's solid.

  


  The concat demuxer approach succeeds without errors but takes about 10 times as long.

  


  Steps to reproduce

  


  Download Big Buck Bunny :

  


  wget https://download.blender.org/demo/movies/BBB/bbb_sunflower_1080p_30fps_normal.mp4


  


  Transcode a 30 second chunk :

  


  ffmpeg -i bbb_sunflower_1080p_30fps_normal.mp4 -ss '00:06:30' -t 30 -c:v libx264 -crf 18 bbb30.mp4


  


  Create one second parts :

  


  mkdir -p parts;
for i in $(seq -f "%02g" 0 29); do \
  ffmpeg \
    -i bbb30.mp4 \
    -ss "00:00:$i" -t 1 \
    -c:v libx264 -pix_fmt yuv420p -crf 18 \
    -bsf:v h264_mp4toannexb \
    -f mpegts \
    -y parts/$i.ts;
done


  


  Combine all the parts into a new output mp4 :

  


  ffmpeg -y \
  -i "concat:parts/00.ts|parts/01.ts|parts/02.ts|parts/03.ts|parts/04.ts|parts/05.ts|parts/06.ts|parts/07.ts|parts/08.ts|parts/09.ts|parts/10.ts|parts/11.ts|parts/12.ts|parts/13.ts|parts/14.ts|parts/15.ts|parts/16.ts|parts/17.ts|parts/18.ts|parts/19.ts|parts/20.ts|parts/21.ts|parts/22.ts|parts/23.ts|parts/24.ts|parts/25.ts|parts/26.ts|parts/27.ts|parts/28.ts|parts/29.ts" \
  -c copy \
  output.mp4


  


  Stderr has lots of warnings about corrupt packets (in this case always at dts = 21300) :

  


  [mpegts @ 0x555d172daa00] Packet corrupt (stream = 0, dts = 213000).
concat:parts/00.ts|parts/01.ts|parts/02.ts|parts/03.ts|parts/04.ts|parts/05.ts|parts/06.ts|parts/07.ts|parts/08.ts|parts/09.ts|parts/10.ts|parts/11.ts|parts/12.ts|parts/13.ts|parts/14.ts|parts/15.ts|parts/16.ts|parts/17.ts|parts/18.ts|parts/19.ts|parts/20.ts|parts/21.ts|parts/22.ts|parts/23.ts|parts/24.ts|parts/25.ts|parts/26.ts|parts/27.ts|parts/28.ts|parts/29.ts: corrupt input packet in stream 0


  


  The resulting mp4 looks ok to my eye, but obviously ffmpeg isn't happy about something. Any ideas ?