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• ffmpeg converts .flv video to .gif with awful quality [migrated]

  22 février 2013, par Kamil Hismatullin

  I'm converting .flv movie to .gif file with ffmpeg.

  ffmpeg -i input.flv -ss 00:00:00.000 -pix_fmt rgb24 -r 10 -s 320x240 -t 00:00:10.000  output.gif

  It works great, but output gif file has a very law quality.

  Any ideas how can I improve quality of converted gif ?

  Output of command :

  $ ffmpeg -i input.flv -ss 00:00:00.000 -pix_fmt rgb24 -r 10 -s 320x240 -t 00:00:10.000  output.gif 
  
  
  
  ffmpeg version 0.8.5-6:0.8.5-0ubuntu0.12.10.1, Copyright (c) 2000-2012 the Libav developers
  
    built on Jan 24 2013 14:52:53 with gcc 4.7.2
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.flv':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2013-02-14 04:00:07
  
    Duration: 00:00:18.85, start: 0.000000, bitrate: 3098 kb/s
  
      Stream #0.0(und): Video: h264 (High), yuv420p, 1280x720, 2905 kb/s, 25 fps, 25 tbr, 50 tbn, 50 tbc
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
      Stream #0.1(und): Audio: aac, 44100 Hz, stereo, s16, 192 kb/s
  
      Metadata:
  
        creation_time   : 2013-02-14 04:00:07
  
  [buffer @ 0x92a8ea0] w:1280 h:720 pixfmt:yuv420p
  
  [scale @ 0x9215100] w:1280 h:720 fmt:yuv420p -> w:320 h:240 fmt:rgb24 flags:0x4
  
  Output #0, gif, to 'output.gif':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2013-02-14 04:00:07
  
      encoder         : Lavf53.21.1
  
      Stream #0.0(und): Video: rawvideo, rgb24, 320x240, q=2-31, 200 kb/s, 90k tbn, 10 tbc
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
  Press ctrl-c to stop encoding
  
  frame=  101 fps= 32 q=0.0 Lsize=    8686kB time=10.10 bitrate=7045.0kbits/s dup=0 drop=149    
  
  video:22725kB audio:0kB global headers:0kB muxing overhead -61.778676%

  Thanks.

• Why encoding G723 sound clicks ?

  19 septembre 2012, par Stanislav Litvinenko

  I need to encode G723_1
  To do this, I want to use avcodec.
  But when listening to the encoded file only sound clicks.
  To use an example to test api-example.c

  Example encoded file : test.g723

  Why this can happen ? And how it can be solved ?

• Failed to convert DAV files to AVI using FFMPEG

  24 décembre 2020, par AUDICOM

  I need to convert DAV files (files generated from security camera recorders) to AVI. I have a script that works, but it does not convert multiple files, and the files are not corrupted.
I use the following code :

  



  for %% A IN (* .dav) DO ffmpeg -i "%% A" -vcodec libx264 "%% A.avi


  



  
FOLLOW LINK WITH DAV FILE : https://www.dropbox.com/s/u7agzzb8pe57uxy/DAV%20TEST.dav?dl=0


  



  I get the following error on certain files :

  



  "Format dhav detected only with low score of 1, misdetection possible !"