[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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