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• Force FFMPEG to use TCP protocol when reading a RTSP Stream

  7 juin 2016, par gary_star

  I’m running ffmpeg (Windows 7, 64bit) from command line to get a frame from a RTSP stream (second channel from my DVR) :

  ffmpeg  -i "rtsp://xxx.xxx.xxx.xxx:554/user=xxxx&password=xxxx&channel=2&stream=0.sdp" -rtsp_transport tcp -y video.jpg

  After running, it waits for about 10 seconds and then i get :

  [rtsp @ 026fd840] UDP timeout, retrying with TCP

  After another long wait (2 minutes or so), i get :

  [rtsp @ 028dd840] Could not find codec parameters for stream 0 (Video: h264): unspecified size

  I read somewhere that I have to force using TCP, because changing from UDP to TCP will not work.

  I don’t understand why -rtsp_transport tcp is not working.

  I’m using ffmpeg version N-62509-g97751e1 built on Apr 17 2014 22:01:31 with gcc 4.8.2 (GCC).

  Please help me.
  Thank you.

• FFmpeg playing multiple videos concurrently - mute/unmute

  21 avril 2014, par pris

  I have 3 videos (video1/video2/video3). I would like to play them on different time intervals :

  • video1 plays from 0-15s (video1 with sound, video2/video3 mute)
  • video2 plays from 15-21s (video2 with sound, video1/video3 mute)
  • video1 plays from 22-30s (video1 with sound, video2/video3 mute)
  • video3 plays from 31-40s (video3 with sound, video1/video2 mute)

  I have tried the following but only video1 has sound :

  ffmpeg -i video1.mp4 -i video2.mp4 -i video3.mp4 -i video4.mp4 -filter_complex "[0:v][1:v] overlay=0:0:enable='between(t,10,20)' [tmp]; [tmp][2:v] overlay=0:0:enable='between(t,30,40)' [tmp1]; [tmp1][3:v] overlay=0:0:enable='between(t,50,60)'" final.mp4

  Console output :

      ffmpeg version N-62475-g256f530 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Apr 15 2014 22:09:47 with gcc 4.8.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
  
   --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-li
  
  bmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-l
  
  ibsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --en
  
  able-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 76.100 / 52. 76.100
  
    libavcodec     55. 58.103 / 55. 58.103
  
    libavformat    55. 37.100 / 55. 37.100
  
    libavdevice    55. 13.100 / 55. 13.100
  
    libavfilter     4.  4.100 /  4.  4.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'master_video.mp4':
  
    Metadata:
  
      major_brand     : FACE
  
      minor_version   : 1337
  
      compatible_brands: isomavc1FACE
  
      creation_time   : 2013-03-30 15:06:28
  
    Duration: 00:01:57.82, start: 0.000000, bitrate: 248 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 210 kb/s, 24.88 fps, 24.88 tbr, 24880 t
  
  bn, 49.76 tbc (default)
  
      Metadata:
  
        creation_time   : 2013-03-30 15:06:28
  
        handler_name    : /tmp/tmpvYmHiO/4698028013036._video.264 - Imported with GPAC 0.4.6-DEV-rev3544
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 22050 Hz, mono, fltp, 36 kb/s (default)
  
      Metadata:
  
        creation_time   : 2013-03-30 15:06:28
  
        handler_name    : /tmp/tmpvYmHiO/4698028013036._audio.aac - Imported with GPAC 0.4.6-DEV-rev3544
  
  Output #0, flv, to 'final.flv':
  
    Metadata:
  
      major_brand     : FACE
  
      minor_version   : 1337
  
      compatible_brands: isomavc1FACE
  
      encoder         : Lavf55.37.100
  
      Stream #0:0(und): Video: flv1 (flv) ([2][0][0][0] / 0x0002), yuv420p, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 1k tbn, 24.88 tbc (default)
  
      Metadata:
  
        creation_time   : 2013-03-30 15:06:28
  
        handler_name    : /tmp/tmpvYmHiO/4698028013036._video.264 - Imported with GPAC 0.4.6-DEV-rev3544
  
      Stream #0:1(und): Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 22050 Hz, mono, fltp (default)
  
      Metadata:
  
        creation_time   : 2013-03-30 15:06:28
  
        handler_name    : /tmp/tmpvYmHiO/4698028013036._audio.aac - Imported with GPAC 0.4.6-DEV-rev3544
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> flv)
  
    Stream #0:1 -> #0:1 (aac -> libmp3lame)
  
  Press [q] to stop, [?] for help
  
  frame= 2927 fps=331 q=10.1 Lsize=    3577kB time=00:01:57.83 bitrate= 248.7kbits/s dup=0 drop=4519
  
  video:3000kB audio:460kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.369707%

  Your help will be much appreciated.

• Use ffmpeg to cut mkv file [migrated]

  16 avril 2014, par Chk0nDanger

  I tried to cut MKV video file by following command in Linux mint 16.

  ffmpeg -i input.mkv -vcodec copy -acodec copy -ss 00:39:05 -t 00:03:03 out.mkv

  output :

  ffmpeg version 0.8.10-6:0.8.10-0ubuntu0.13.10.1, Copyright (c) 2000-2013 the Libav developers
  
    built on Feb  6 2014 20:53:28 with gcc 4.8.1
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  [matroska,webm @ 0x1774be0] max_analyze_duration reached
  
  [matroska,webm @ 0x1774be0] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, matroska,webm, from 'input.mkv':
  
    Duration: 00:58:35.63, start: 0.000000, bitrate: N/A
  
      Stream #0.0(eng): Video: h264 (High), yuv420p, 1280x720 [PAR 1:1 DAR 16:9], 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
  
      Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16 (default)
  
      Stream #0.2(eng): Subtitle: [0][0][0][0] / 0x0000
  
  Output #0, matroska, to 'out2.mkv':
  
      Stream #0.0(eng): Video: [0][0][0][0] / 0x0000, yuv420p, 1280x720 [PAR 1:1 DAR 16:9], q=2-31, 90k tbn, 25 tbc (default)
  
      Stream #0.1(eng): Audio: aac, 48000 Hz, stereo (default)
  
      Stream #0.2(eng): Subtitle: ass, 200 kb/s
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
    Stream #0.1 -> #0.1
  
    Stream #0.2 -> #0.2
  
  Decoder (codec id 94210) not found for input stream #0.2

  It shows an error. I tried changing options but still can not cut the file.
  Is there simplest way to cut mkv file on Linux ?