[FFmpeg-user] Encode lossless Dirac?

Peter B. pb at das-werkstatt.com
Tue Nov 22 10:11:08 CET 2011


Carl Eugen Hoyos wrote:
>> No, because when trying "0" it says:
>>
>> [quote]
>> qscale must be > 0.0 and <= 255
>> [/quote]
>>     
>
> Command line and complete, uncut console output missing.
>   
Sorry...

[quote]
user at hostname:~/test/dirac$ ffmpeg -i v-10922_01-071.avi -an -vcodec
libdirac -qscale 0 test.mkv
FFmpeg version 0.6, Copyright (c) 2000-2010 the FFmpeg developers
  built on Jul 30 2010 12:08:53 with gcc 4.3.2
  configuration: --prefix=/usr/local --enable-gpl --enable-nonfree
--enable-postproc --enable-swscale --enable-avfilter
--enable-avfilter-lavf --enable-pthreads --enable-bzlib --enable-libfaac
--enable-libfaad --enable-libmp3lame --enable-libschroedinger
--enable-libvorbis --enable-libxvid --enable-zlib --enable-libopenjpeg
--enable-libdirac
  libavutil     50.15. 1 / 50.15. 1
  libavcodec    52.72. 2 / 52.72. 2
  libavformat   52.64. 2 / 52.64. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1.19. 0 /  1.19. 0
  libswscale     0.11. 0 /  0.11. 0
  libpostproc   51. 2. 0 / 51. 2. 0
Input #0, avi, from 'v-10922_01-071.avi':
  Metadata:
    ISFT            : Lavf52.31.0
  Duration: 00:00:41.88, start: 0.000000, bitrate: 52834 kb/s
    Stream #0.0: Video: ffv1, yuv422p, 720x576, 25 tbr, 25 tbn, 25 tbc
    Stream #0.1: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
qscale must be > 0.0 and <= 255
[/quote]

Hm...
Now that I see this, I figure that for this test, I've used the wrong
FFmpeg version!
The git-version *does* allow "0" as qscale factor. Darn...

I'll do some new testing...


Thanks,
Pb


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