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• Cropping specific parts on a video using ffmpeg

  15 juin 2016, par Le Qs

  I have a video SB.ogv that i want to cut some parts.The video is 01:36 long and i want to cut out the first four seconds of the video.

  I a using this command

  ffmpeg -i SB.ogv -vcodec copy -acodec copy -ss 00:00:04 -to 00:01:36 outputFile.ogv

  I got this error

  qubit@qubit-HP-EliteBook-2540p:~/dv$ ffmpeg -i SB.ogv -vcodec copy -acodec copy -ss 00:00:04 -to 00:01:36 outputFile.ogv
  
  ffmpeg version 2.7.6-0ubuntu0.15.10.1 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.2.1 (Ubuntu 5.2.1-22ubuntu2) 20151010
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.15.10.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-frei0r --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-openal --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libxvid --enable-libzvbi --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-libssh --enable-libsoxr --enable-libx264 --enable-libopencv --enable-libx265
  
    libavutil      54. 27.100 / 54. 27.100
  
    libavcodec     56. 41.100 / 56. 41.100
  
    libavformat    56. 36.100 / 56. 36.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 16.101 /  5. 16.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.100 /  1.  2.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [ogg @ 0x1bbfc80] Broken file, keyframe not correctly marked.
  
  Input #0, ogg, from 'SB.ogv':
  
    Duration: 00:01:36.40, start: 0.000000, bitrate: 1685 kb/s
  
      Stream #0:0: Data: none
  
      Stream #0:1: Video: theora, yuv420p, 1280x800 [SAR 1:1 DAR 8:5], 15 tbr, 15 tbn, 15 tbc
  
      Metadata:
  
        RECORDMYDESKTOP : 0.3.8.1
  
      Stream #0:2: Audio: vorbis, 22050 Hz, mono, fltp, 89 kb/s
  
  Output #0, ogg, to 'outputFile.ogv':
  
    Metadata:
  
      encoder         : Lavf56.36.100
  
      Stream #0:0: Video: theora, yuv420p, 1280x800 [SAR 1:1 DAR 8:5], q=2-31, 15 tbr, 15 tbn, 15 tbc
  
      Metadata:
  
        RECORDMYDESKTOP : 0.3.8.1
  
        encoder         : Lavf56.36.100
  
      Stream #0:1: Audio: vorbis, 22050 Hz, mono, 89 kb/s
  
      Metadata:
  
        encoder         : Lavf56.36.100
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (copy)
  
    Stream #0:2 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [ogg @ 0x1bbfc80] Broken file, keyframe not correctly marked.
  
      Last message repeated 13 times
  
  [ogg @ 0x1bbfc80] Broken file, non-keyframe not correctly marked.
  
      Last message repeated 9 times
  
  [ogg @ 0x1bbfc80] Broken file, keyframe not correctly marked.
  
      Last message repeated 2 times
  
  [ogg @ 0x1bbfc80] Broken file, non-keyframe not correctly marked.
  
      Last message repeated 8 times
  
  [ogg @ 0x1bbfc80] Broken file, keyframe not correctly marked.
  
  frame= 1090 fps=0.0 q=-1.0 Lsize=   19021kB time=00:01:32.00 bitrate=1693.7kbits/s    
  
  video:17509kB audio:1413kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.524658%
  
  qubit@qubit-HP-EliteBook-2540p:~/dv$ 

  The video SB.ogv is in the current directory.

• Make Multiple thumbnails from video with ffmpeg

  14 septembre 2022, par parsa

  I have a question,How can I create multiple thumbnail at different times of video ?
Mean operate like this schematic :

  



    input.mp4 =>  00:10:00 => 1.jpg
  input.mp4 =>  00:20:00 => 2.jpg
  input.mp4 =>  00:25:00 => 3.jpg


  



  I mean, with one command I produce multiple thumbnails from different frames.
Is there any recommendation ?
Can anyone help me ?

  


• Packet Corruption : Why sometimes ffmpeg .bat batch video editing makes my computer unstable unable to restart ?

  13 juin 2022, par principal-ideal-domain

  I'm doing very time consuming ffmpeg video editing. That's why I put my commands into a .bat batch file and run them over night. Usually that works fine, but from time to time when I look the next moring I see an error message of this kind :

  


  

  


  From that state on, I didn't find any good way to close the console. When I press the [x] button in the top right corner, it freezes. When I try to kill the application using the task manager nothing happens. Even explorer.exe cannot be closed using the task manager. A shutdown won't do anything. During the last month I had this problem about three times and the only way I could close it was to long press the power button of the computer until it was turned off "the bad way".

  


  Any ideas what to in such situations ?
  
Or even better : How to prevent those situations ?
What can the reason(s) be for the error ?
Do you understand the message ?

  


  When the computer is started again the next morining and I run the same .bat file again everything works fine. So the same error does not repeat and the video is edited nicely !

  


  Edit : Now, about one week after posting this question the problem occurred many more times ! It is very annoying. I guess it has to do with the external hard drive connected by USB. Sometimes it randomly interrupts the connection ! That might be the reason for the behavior. Whatever its causing the error, I want to learn a solution how to deal with this in future. I don't want to always push the reset button of my computer. I want a proper way to be able to shut it down.