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• FFmpeg : Splitting video into segments of very small size (e.g. 5KB)

  3 avril 2019, par user528827

  I am trying to split a video file into segments that are less than 10KB (ideally 5KB) using FFmpeg.

  The video I am using is this one : https://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_320x180.mp4. It already has a low resolution.

  I have tried specifying a very small -segment_time of 00:00:0.04 :

  ffmpeg -i BigBuckBunny_320x180.mp4 -c copy -map 0 -f segment -segment_time 00:00:0.04 BigBuckBunny_320x180_%03d.mp4

  I have tried specifying sequential -segment_frames e.g. 1,2,3,4,5,6,7... etc. :

  ffmpeg -i BigBuckBunny_320x180.mp4 -c copy -map 0 -f segment -segment_frames 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30 -segment_list out.csv BigBuckBunny_320x180_%03d.mp4

  I have also tried to force key frames :

  ffmpeg -i BigBuckBunny_320x180.mp4 -force_key_frames "expr:gte(t,n_forced*0.04)" -c copy -map 0 -f segment -segment_frames 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30 BigBuckBunny_320x180_%03d.mp4

  All of these result in segments 0.5s long with varying file sizes averaging about 50KB.

  username@My-Air:~/dev/video$ less out.csv 
  
  BigBuckBunny_320x180_000.mp4,0.000000,0.500000
  
  BigBuckBunny_320x180_001.mp4,0.500000,1.000000
  
  BigBuckBunny_320x180_002.mp4,1.000000,1.500000
  
  BigBuckBunny_320x180_003.mp4,1.500000,2.000000
  
  BigBuckBunny_320x180_004.mp4,2.000000,2.500000
  
  BigBuckBunny_320x180_005.mp4,2.500000,3.000000
  
  ...
  
  
  
  username@My-Air:~/dev/video/bunny_0.5s_splits$ ls -l
  
  total 134552
  
  -rw-r--r--  1 username  staff    16K 25 Mar 23:40 BigBuckBunny_320x180_000.mp4
  
  -rw-r--r--  1 username  staff    26K 25 Mar 23:40 BigBuckBunny_320x180_001.mp4
  
  -rw-r--r--  1 username  staff    36K 25 Mar 23:40 BigBuckBunny_320x180_002.mp4
  
  -rw-r--r--  1 username  staff    44K 25 Mar 23:40 BigBuckBunny_320x180_003.mp4
  
  -rw-r--r--  1 username  staff    40K 25 Mar 23:40 BigBuckBunny_320x180_004.mp4
  
  -rw-r--r--  1 username  staff    38K 25 Mar 23:40 BigBuckBunny_320x180_005.mp4
  
  -rw-r--r--  1 username  staff    43K 25 Mar 23:40 BigBuckBunny_320x180_006.mp4
  
  -rw-r--r--  1 username  staff    44K 25 Mar 23:40 BigBuckBunny_320x180_007.mp4
  
  -rw-r--r--  1 username  staff    50K 25 Mar 23:40 BigBuckBunny_320x180_008.mp4
  
  -rw-r--r--  1 username  staff    49K 25 Mar 23:40 BigBuckBunny_320x180_009.mp4
  
  -rw-r--r--  1 username  staff    50K 25 Mar 23:40 BigBuckBunny_320x180_010.mp4
  
  -rw-r--r--  1 username  staff    51K 25 Mar 23:40 BigBuckBunny_320x180_011.mp4
  
  -rw-r--r--  1 username  staff    51K 25 Mar 23:40 BigBuckBunny_320x180_012.mp4
  
  -rw-r--r--  1 username  staff    57K 25 Mar 23:40 BigBuckBunny_320x180_013.mp4
  
  -rw-r--r--  1 username  staff    53K 25 Mar 23:40 BigBuckBunny_320x180_014.mp4
  
  -rw-r--r--  1 username  staff    57K 25 Mar 23:40 BigBuckBunny_320x180_015.mp4
  
  -rw-r--r--  1 username  staff    57K 25 Mar 23:40 BigBuckBunny_320x180_016.mp4
  
  -rw-r--r--  1 username  staff    61K 25 Mar 23:40 BigBuckBunny_320x180_017.mp4
  
  ...

  It’s strange that the timestamps are at exactly 0s and 0.5s. Is this limitation of FFmpeg ? I couldn’t find any documentation to verify this.

  Is there any way to get these file sizes down to 5KB ? Is it possible with FFmpeg ? If not, is there another tool I could use ? I looked at GStreamer but couldn’t really see if it was possible and it seems very complicated.

  Any help appreciated. Thanks.

• Anomalie #3779 (En cours) : Erreur ""Un dossier temporaire est manquant pour télécharger les fichi...

  13 août 2016, par b b

  Hola, este falta viene de PHP UPLOAD_ERR_NO_TMP_DIR :

  http://zone.spip.org/trac/spip-zone/browser/_core_/plugins/medias/inc/joindre_document.php#L187
  http://php.net/manual/fr/features.file-upload.errors.php

  Pienso que tu tienes un problemo con la configuratcon de tu servidor y que podemos cercar este ticket ;)

• FFMPEG "Could find no file with path" and "No such file or directory"

  4 mai 2020, par bmw_58

  I try to convert a sequence of pictures to video file. 
But I get from ffmpeg the response, that no such file or directory

  



  Does someone have a solution for it ?

  



  My command line :

  



  ffmpeg -r 1/5 -start_number 0 -i "C:\Users\USER\Desktop\Pictures\%3d.png" -c:v libx264 -r 30 -pix_fmt yuv420p C:\Users\USER\Desktop\Pictures\out.mp4


  



  The error :

  



          C:\Users\USER>ffmpeg -r 1/5 -start_number 0 -i "C:\Users\USER\Desktop\Pictures\%3d.png" -c:v libx264 -r 30 -pix_fmt yuv420p C:\Users\USER\Desktop\Pictures\out.mp4
    ffmpeg version git-2020-05-01-39fb1e9 Copyright (c) 2000-2020 the FFmpeg developers
      built with gcc 9.3.1 (GCC) 20200328
      configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --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-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
      libavutil      56. 43.100 / 56. 43.100
      libavcodec     58. 82.100 / 58. 82.100
      libavformat    58. 42.101 / 58. 42.101
      libavdevice    58.  9.103 / 58.  9.103
      libavfilter     7. 80.100 /  7. 80.100
      libswscale      5.  6.101 /  5.  6.101
      libswresample   3.  6.100 /  3.  6.100
      libpostproc    55.  6.100 / 55.  6.100
    [image2 @ 000002169186c440] Could find no file with path 'C:\Users\USER\Desktop\Pictures\%3d.png' and index in the range 0-4
    C:\Users\USER\Desktop\Pictures\%3d.png: No such file or directory