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• how to add duration to mjpeg or how to make mjpeg faster

  10 octobre 2014, par n2v2rda2

  i have ip-cam mjpeg that i made and it have total 240 frames

  encode souce is
  ffmpeg.exe -framerate 25 -i c :\%06d.jpg\ -s 1920x1080 -qscale 1 -vcodec mjpeg -r 25 C :\result.mjpg -y

  now i want to play result.mjpg by mjpeg player i made

  my problem
  
  1. i can't get mjpeg's play time or duration time
  
  
  
  2. playing is slower then other movie player so i want to sync it and play more faster

  below is ffprobe result

  Input #0, mjpeg, from 'result.mjpg':
  
  Duration: N/A, bitrate: N/A
  
  Stream #0:0: Video: mjpeg, yuvj444p(pc, bt470bg), 1920x1080, 25 tbr, 1200k tbn, 25 tbc

  below is result added -show_frame

  [FRAME]
  
  media_type=video
  
  key_frame=1
  
  pkt_pts=720000
  
  pkt_pts_time=0.600000
  
  pkt_dts=720000
  
  pkt_dts_time=0.600000
  
  best_effort_timestamp=720000
  
  best_effort_timestamp_time=0.600000
  
  pkt_duration=48000
  
  pkt_duration_time=0.040000
  
  pkt_pos=4731406
  
  pkt_size=313289
  
  width=1920
  
  height=1080
  
  pix_fmt=yuvj444p
  
  sample_aspect_ratio=333:320
  
  pict_type=I
  
  coded_picture_number=0
  
  display_picture_number=0
  
  interlaced_frame=0
  
  top_field_first=0
  
  repeat_pict=0
  
  [/FRAME]

  ffprobe show me there are Duration : N/A, bitrate : N/A

  how do i set Duration and bitrate
  is there any encode-option i have to set ?

  when i decode mjpeg like below

  i can’t get duration just 0

  AVFormatContext*  pFC;
  
  int               ret;
  
  
  
  pFC = avformat_alloc_context();
  
  
  
  ret  = avformat_open_input(&pFC, filename, NULL, NULL);
  
  if (ret < 0) {
  
      // fail .
  
  }
  
  
  
  ret  = avformat_find_stream_info(pFC, NULL);
  
  if (ret < 0) {
  
      // fail
  
  }
  
  printf("duration %ld", pFC->duration);   <----- only 0

• Appending two audiofiles React Native

  21 octobre 2020, par R. Adang

  I want to combine to wav files into one file. So file1 + file2 = file3.
I am currently looking into ffmpeg, but when I try to use concat it only returns a file with the length of the first file. The react native code that I use is :

  



  RNFFmpeg.execute('-i "concat:' + path1 + '|' + pathOutput + '" -acodec copy ' + pathOutput2).then(result => console.log("FFmpeg process exited with rc " + result.rc)); 


  



  Is my command wrong ?

  



  If you have a better solution for this please let me know !

  


• Copy codecs setting from video or how to join video using ffmpeg [closed]

  6 décembre 2012, par Степан Талабира

  We have 2 videos :
  test1.mp4 and test2.mp4

  How do I convert video 1 with parameters video 2 ? (for join them together)

  I tried to pull out the parameters of video using ffmpeg-php.
  But the result is bad .. mkvmerge or MP4Box not join this result video.
  Mencoder says that the video codec settings is different...

  Сan anyone tell me how to blind 2 video (the first small and second big) without re-encoding the second movie
  Video mp4 H.264.