[FFmpeg-trac] #1346(avcodec:new): q:a for -acodec aac

FFmpeg trac at avcodec.org
Wed May 23 14:18:05 CEST 2012


#1346: q:a for -acodec aac
--------------------------------------+---------------------------------
               Reporter:  cehoyos     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  normal      |              Component:  avcodec
                Version:  git-master  |               Keywords:  aac
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+---------------------------------
 The native aac encoder source code contains hints that global_quality is
 respected, but setting -aq makes only a minimal output file size
 difference.
 This used to work before release 0.6.
 {{{
 $ ffmpeg -i fate-suite/lossless-audio/luckynight-partial.tta -strict
 experimental -q:a 0.001 -t 8 out.aac
 ffmpeg version N-40960-ge15f128 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on May 23 2012 13:44:40 with gcc 4.3.2
   configuration: --cc=/usr/local/gcc-4.3.2/bin/gcc --enable-gpl --enable-
 libopenjpeg --enable-libvorbis --enable-libspeex --enable-libmp3lame
 --enable-libtheora --extra-ldflags=-lm
   libavutil      51. 53.100 / 51. 53.100
   libavcodec     54. 23.100 / 54. 23.100
   libavformat    54.  6.100 / 54.  6.100
   libavdevice    53.  4.100 / 53.  4.100
   libavfilter     2. 76.100 /  2. 76.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 Input #0, tta, from 'fate-suite/lossless-audio/luckynight-partial.tta':
   Duration: 00:01:00.48, start: 0.000000, bitrate: 138 kb/s
     Stream #0:0: Audio: tta, 44100 Hz, stereo, s16
 [aformat @ 0x8f14200] auto-inserting filter 'auto-inserted resampler 0'
 between the filter 'src' and the filter 'aformat'
 [aresample @ 0x8f0b920] r:44100Hz -> r:44100Hz
 Output #0, adts, to 'out.aac':
   Metadata:
     encoder         : Lavf54.6.100
     Stream #0:0: Audio: aac, 44100 Hz, stereo, flt, 128 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (tta -> aac)
 Press [q] to stop, [?] for help
 size=     137kB time=00:00:08.35 bitrate= 134.6kbits/s
 video:0kB audio:135kB global headers:0kB muxing overhead 1.826173%
 }}}
 {{{
 $ ffmpeg -i fate-suite/lossless-audio/luckynight-partial.tta -strict
 experimental -q:a 100000 -t 8 out.aac
 ffmpeg version N-40960-ge15f128 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on May 23 2012 13:44:40 with gcc 4.3.2
   configuration: --cc=/usr/local/gcc-4.3.2/bin/gcc --enable-gpl --enable-
 libopenjpeg --enable-libvorbis --enable-libspeex --enable-libmp3lame
 --enable-libtheora --extra-ldflags=-lm
   libavutil      51. 53.100 / 51. 53.100
   libavcodec     54. 23.100 / 54. 23.100
   libavformat    54.  6.100 / 54.  6.100
   libavdevice    53.  4.100 / 53.  4.100
   libavfilter     2. 76.100 /  2. 76.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 Input #0, tta, from 'fate-suite/lossless-audio/luckynight-partial.tta':
   Duration: 00:01:00.48, start: 0.000000, bitrate: 138 kb/s
     Stream #0:0: Audio: tta, 44100 Hz, stereo, s16
 [aformat @ 0x8f14200] auto-inserting filter 'auto-inserted resampler 0'
 between the filter 'src' and the filter 'aformat'
 [aresample @ 0x8f0b920] r:44100Hz -> r:44100Hz
 Output #0, adts, to 'out.aac':
   Metadata:
     encoder         : Lavf54.6.100
     Stream #0:0: Audio: aac, 44100 Hz, stereo, flt, 128 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (tta -> aac)
 Press [q] to stop, [?] for help
 size=     144kB time=00:00:08.35 bitrate= 140.9kbits/s
 video:0kB audio:141kB global headers:0kB muxing overhead 1.742700%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1346>
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