[FFmpeg-trac] #2251(FFmpeg:new): avconv ignores "-q" argument

FFmpeg trac at avcodec.org
Fri Feb 8 03:11:24 CET 2013


#2251: avconv ignores "-q" argument
-------------------------------------+-------------------------------------
             Reporter:  illumilore   |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  FFmpeg       |                  Version:
             Keywords:               |  unspecified
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------
 When converting to webm with a "-q 9" argument, avconv instead uses the
 lowest quality conversion. As it is encoding, it says "q=0.0" and the
 resulting file is small in size and has bad quality.

 "avconv -i vid.mkv -q 9 vid.webm"

 avconv version 0.8.5-6:0.8.5-0ubuntu0.12.10.1, Copyright (c) 2000-2012 the
 Libav developers
   built on Jan 24 2013 14:49:20 with gcc 4.7.2
 avconv 0.8.5-6:0.8.5-0ubuntu0.12.10.1
 libavutil    51. 22. 1 / 51. 22. 1
 libavcodec   53. 35. 0 / 53. 35. 0
 libavformat  53. 21. 1 / 53. 21. 1
 libavdevice  53.  2. 0 / 53.  2. 0
 libavfilter   2. 15. 0 /  2. 15. 0
 libswscale    2.  1. 0 /  2.  1. 0
 libpostproc  52.  0. 0 / 52.  0. 0

 Summary of the bug:
 How to reproduce:
 {{{
 % ffmpeg -i input ... output
 ffmpeg version
 built on ...
 }}}
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2251>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker


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