#1436: transcoding .aac to mp4
-------------------------------------+-------------------------------------
Reporter: Silly | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: unspecified | undetermined
Keywords: aac mp4 | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
-------------------------------------+-------------------------------------
Comment (by Silly):
.wav to .aac:
{{{
$ ffmpeg -i the_reaper_stereo_44.1k.wav -strict experimental -acodec aac
-y the_reaper_stereo_44.1k.aac
ffmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg
developers
built on May 29 2012 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
configuration: --enable-gpl --enable-libmp3lame --enable-libtheora
--enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264
--enable-version3
libavutil 51. 55.100 / 51. 55.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[wav @ 0x14786100] max_analyze_duration 5000000 reached at 5015510
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'the_reaper_stereo_44.1k.wav':
Metadata:
title : (Don't Fear) The Reaper
artist : Blue Öyster Cult
date : 1983
Duration: 00:05:09.76, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16, 1411 kb/s
[aformat @ 0x1480f760] auto-inserting filter 'auto-inserted resampler 0'
between the filter 'src' and the filter 'aformat'
[aresample @ 0x1483a3a0] chl:stereo fmt:s16 r:44100Hz -> chl:stereo
fmt:flt r:44100Hz
Output #0, adts, to 'the_reaper_stereo_44.1k.aac':
Metadata:
title : (Don't Fear) The Reaper
artist : Blue Öyster Cult
date : 1983
encoder : Lavf54.6.101
Stream #0:0: Audio: aac, 44100 Hz, stereo, flt, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le -> aac)
Press [q] to stop, [?] for help
size= 4973kB time=00:05:09.77 bitrate= 131.5kbits/s
video:0kB audio:4882kB global headers:0kB muxing overhead 1.868102%
}}}
.aac to .mp4
{{{
ffmpeg -i the_reaper_stereo_44.1k.aac -y the_reaper_stereo_44.1k.mp4
ffmpeg version N-41113-ge7cb161 Copyright (c) 2000-2012 the FFmpeg
developers
built on May 29 2012 19:26:04 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
configuration: --enable-gpl --enable-libmp3lame --enable-libtheora
--enable-libvo-aacenc --enable-libvorbis --enable-libvpx --enable-libx264
--enable-version3
libavutil 51. 55.100 / 51. 55.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.101 / 54. 6.101
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[aac @ 0x11034100] max_analyze_duration 5000000 reached at 5015510
[aac @ 0x11034100] Estimating duration from bitrate, this may be
inaccurate
Input #0, aac, from 'the_reaper_stereo_44.1k.aac':
Duration: 00:05:31.22, bitrate: 122 kb/s
Stream #0:0: Audio: aac, 44100 Hz, stereo, s16, 122 kb/s
Output #0, mp4, to 'the_reaper_stereo_44.1k.mp4':
Metadata:
encoder : Lavf54.6.101
Stream #0:0: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo,
s16, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (aac -> libvo_aacenc)
Press [q] to stop, [?] for help
size= 4966kB time=00:08:41.16 bitrate= 78.1kbits/s
video:0kB audio:4841kB global headers:0kB muxing overhead 2.573264%
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1436#comment:2>
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