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• 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 ?

• Anomalie #4384 (Nouveau) : spip_loader, pclzip.php:28 : Warning : Use of undefined constant _DIR_TM...

  19 septembre 2019, par David SAUVAGE

  spip_loader 3.0.5
  PHP Version 7.2.22

  Warning : Use of undefined constant _DIR_TMP - assumed ’_DIR_TMP’ (this will throw an Error in a future version of PHP) in [truncated]/pclzip.php on line 28
  

• Truncated videos in multi input multi output ffmpeg command

  1er août 2019, par Bhupendra Fatnani

  I am trying to copy videos from a CCTV DVR server (6 channels) using rtsp. How do I optimize my ffmpeg command ?

  Below is the configuration :

  ffmpeg version : ffmpeg-4.1.4-win64-static
  CPU : Intel Core i7-8650U @1.9 GHz 2.11 GHz
  RAM : 16 GB

  When I try to download from 3 channels, the videos seem to download fine, but when I use >=4 channels simultaneously, the video from channel 1 truncates almost after about 5 secs, and the output files are much smaller from channel 2 to 4, channel 5 video output has no issues.

  For e.g. here are the output file sizes according to channels.

  Channel 1 : 1.7 MB (truncated)
  
  Channel 2 : 27.5 MB (approx 5 secs video loss in the beginning)
  
  Channel 3 : 28.5 MB (approx 3-4 secs loss)
  
  channel 4 : 29.5 MB (approx 2 secs loss)
  
  Channel 5 : 30 MB (no issues found)

  Below is the command I am trying to use to download.

  ffmpeg -rtsp_transport tcp -thread_queue_size 1024 -i rtsp://<input url="url" 1="1" /> -thread_queue_size 1024 -i rtsp://<input url="url" 2="2" /> -thread_queue_size 1024 -i rtsp://<input url="url" 3="3" /> -thread_queue_size 1024 -i rtsp://<input url="url" 4="4" /> -thread_queue_size 1024 -i rtsp://<input url="url" 5="5" /> -map 0 -vcodec copy -t 60 -y outputfile1.mp4 -map 1 -vcodec copy -t 60 -y outputfile2.mp4 -map 2 -vcodec copy -t 60 -y outputfile3.mp4 -map 3 -vcodec copy -t 60 -y outputfile4.mp4 -map 4 -vcodec copy -t 60 -y outputfile5.mp4

  Below is the actual output :

  ffmpeg version 4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9.1.1 (GCC) 20190716
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  Input #0, rtsp, from 'rtsp://<input url="url" title="title" n="n" />A, start: 0.080000, bitrate: N/A
  
      Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080, 25 tbr, 90k tbn, 180k tbc
  
  [udp @ 000001f27c6fffc0] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [udp @ 000001f27c74f400] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [rtsp @ 000001f27c721f40] max delay reached. need to consume packet
  
  [rtsp @ 000001f27c721f40] RTP: missed 15 packets
  
  [h264 @ 000001f27d627ac0] error while decoding MB 71 49, bytestream -6
  
  [h264 @ 000001f27d627ac0] concealing 2258 DC, 2258 AC, 2258 MV errors in P frame
  
  [h264 @ 000001f27d627ac0] Increasing reorder buffer to 1
  
  Input #1, rtsp, from 'rtsp://<input url="url" title="title" n="n" />A, start: 0.040000, bitrate: N/A
  
      Stream #1:0: Video: h264 (High), yuv420p(progressive), 1920x1080, 25 tbr, 90k tbn, 180k tbc
  
  [udp @ 000001f27c6ffc40] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [udp @ 000001f27d2dc180] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [rtsp @ 000001f27d2db700] max delay reached. need to consume packet
  
  [rtsp @ 000001f27d2db700] RTP: missed 15 packets
  
  [h264 @ 000001f27d2dbd00] concealing 7337 DC, 7337 AC, 7337 MV errors in P frame
  
  [h264 @ 000001f27d2dbd00] Increasing reorder buffer to 1
  
  Input #2, rtsp, from '<input url="url" title="title" n="n" />A, start: 0.080000, bitrate: N/A
  
      Stream #2:0: Video: h264 (High), yuv420p(progressive), 1920x1080, 25 tbr, 90k tbn, 180k tbc
  
  [udp @ 000001f27c6ffd00] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [udp @ 000001f27d302bc0] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [rtsp @ 000001f27cfe9200] max delay reached. need to consume packet
  
  [rtsp @ 000001f27cfe9200] RTP: missed 44 packets
  
  [h264 @ 000001f27cfe6c40] error while decoding MB 41 24, bytestream -8
  
  [h264 @ 000001f27cfe6c40] concealing 5288 DC, 5288 AC, 5288 MV errors in P frame
  
  [h264 @ 000001f27cfe6c40] Increasing reorder buffer to 1
  
  Input #3, rtsp, from '<input url="url" title="title" n="n" />A, start: 0.080000, bitrate: N/A
  
      Stream #3:0: Video: h264 (High), yuv420p(progressive), 1920x1080, 25 tbr, 90k tbn, 180k tbc
  
  [udp @ 000001f27cfe0940] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [udp @ 000001f27dd1bec0] 'circular_buffer_size' option was set but it is not supported on this build (pthread support is required)
  
  [rtsp @ 000001f27daaf040] max delay reached. need to consume packet
  
  [rtsp @ 000001f27daaf040] RTP: missed 107 packets
  
  [h264 @ 000001f27dc05040] concealing 1340 DC, 1340 AC, 1340 MV errors in P frame
  
  [rtsp @ 000001f27daaf040] max delay reached. need to consume packet
  
  [rtsp @ 000001f27daaf040] RTP: missed 28 packets
  
  [h264 @ 000001f27dc05040] Increasing reorder buffer to 1
  
  [h264 @ 000001f27dc05040] concealing 6961 DC, 6961 AC, 6961 MV errors in P frame
  
  [rtsp @ 000001f27daaf040] max delay reached. need to consume packet
  
  [rtsp @ 000001f27daaf040] RTP: missed 53 packets
  
  [h264 @ 000001f27dc05040] error while decoding MB 16 40, bytestream -18
  
  [h264 @ 000001f27dc05040] concealing 3393 DC, 3393 AC, 3393 MV errors in I frame
  
  Input #4, rtsp, from 'rtsp://<input url="url" title="title" n="n" />A, start: 0.120000, bitrate: N/A
  
      Stream #4:0: Video: h264 (High), yuv420p(progressive), 1920x1080, 25 tbr, 90k tbn, 180k tbc
  
  Output #0, mp4, to 'outputfile1.mp4':
  
    Metadata:
  
      title           : -
  
      encoder         : Lavf58.20.100
  
      Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080, q=2-31, 25 tbr, 90k tbn, 90k tbc
  
  Output #1, mp4, to 'outputfile2.mp4':
  
    Metadata:
  
      title           : -
  
      encoder         : Lavf58.20.100
  
      Stream #1:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080, q=2-31, 25 tbr, 90k tbn, 90k tbc
  
  Output #2, mp4, to 'outputfile3.mp4':
  
    Metadata:
  
      title           : -
  
      encoder         : Lavf58.20.100
  
      Stream #2:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080, q=2-31, 25 tbr, 90k tbn, 90k tbc
  
  Output #3, mp4, to 'outputfile4.mp4':
  
    Metadata:
  
      title           : -
  
      encoder         : Lavf58.20.100
  
      Stream #3:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080, q=2-31, 25 tbr, 90k tbn, 90k tbc
  
  Output #4, mp4, to 'outputfile5.mp4':
  
    Metadata:
  
      title           : -
  
      encoder         : Lavf58.20.100
  
      Stream #4:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080, q=2-31, 25 tbr, 90k tbn, 90k tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #1:0 -> #1:0 (copy)
  
    Stream #2:0 -> #2:0 (copy)
  
    Stream #3:0 -> #3:0 (copy)
  
    Stream #4:0 -> #4:0 (copy)
  
  Press [q] to stop, [?] for help
  
  [mp4 @ 000001f27dd0d8c0] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
  [mp4 @ 000001f27dd09040] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
  [mp4 @ 000001f27dd09040] pts has no value
  
  [mp4 @ 000001f27dc054c0] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
  [mp4 @ 000001f27dc054c0] pts has no value
  
  [mp4 @ 000001f27ddf86c0] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
  [mp4 @ 000001f27ddf86c0] pts has no value
  
  [mp4 @ 000001f27c743b00] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
  [mp4 @ 000001f27c743b00] pts has no value
  
  [mp4 @ 000001f27dd0d8c0] Non-monotonous DTS in output stream 0:0; previous: 0, current: 0; changing to 1. This may result in incorrect timestamps in the output file.
  
  [mp4 @ 000001f27dd09040] Non-monotonous DTS in output stream 1:0; previous: 0, current: 0; changing to 1. This may result in incorrect timestamps in the output file.
  
  [mp4 @ 000001f27dc054c0] Non-monotonous DTS in output stream 2:0; previous: 0, current: 0; changing to 1. This may result in incorrect timestamps in the output file.
  
  [mp4 @ 000001f27ddf86c0] Non-monotonous DTS in output stream 3:0; previous: 0, current: 0; changing to 1. This may result in incorrect timestamps in the output file.
  
  [mp4 @ 000001f27c743b00] Non-monotonous DTS in output stream 4:0; previous: 0, current: 0; changing to 1. This may result in incorrect timestamps in the output file.
  
  [mp4 @ 000001f27dd09040] Non-monotonous DTS in output stream 1:0; previous: 1, current: 0; changing to 2. This may result in incorrect timestamps in the output file.
  
  [mp4 @ 000001f27dc054c0] Non-monotonous DTS in output stream 2:0; previous: 1, current: 0; changing to 2. This may result in incorrect timestamps in the output file.
  
  [mp4 @ 000001f27ddf86c0] Non-monotonous DTS in output stream 3:0; previous: 1, current: 0; changing to 2. This may result in incorrect timestamps in the output file.
  
  [mp4 @ 000001f27c743b00] Non-monotonous DTS in output stream 4:0; previous: 1, current: 0; changing to 2. This may result in incorrect timestamps in the output file.
  
  [rtsp @ 000001f27d2db700] max delay reached. need to consume packet
  
  [rtsp @ 000001f27d2db700] RTP: missed 1644 packets
  
  [rtsp @ 000001f27c721f40] max delay reached. need to consume packet
  
  [rtsp @ 000001f27c721f40] RTP: missed 2461 packets
  
  [rtsp @ 000001f27cfe9200] max delay reached. need to consume packet
  
  [rtsp @ 000001f27cfe9200] RTP: missed 733 packets
  
  frame=   46 fps=0.8 q=-1.0 Lq=-1.0 q=-1.0 q=-1.0 q=-1.0 size=    1790kB time=00:00:59.99 bitrate= 244.4kbits/s speed=1.04x
  
  video:119011kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

  Could somebody please help me optimize the ffmpeg command ?