Opened 12 years ago
Last modified 12 years ago
#2372 new enhancement
Support SBR layer in mp3pro
| Reported by: | Carl Eugen Hoyos | Owned by: | |
|---|---|---|---|
| Priority: | wish | Component: | avcodec |
| Version: | git-master | Keywords: | mp3 sbr |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description (last modified by )
FFmpeg does not support decoding the SBR layer of mp3pro.
Samples are available:
http://samples.ffmpeg.org/archive/extension/mp3/mp3++mp3++mp3pro_CBR40kbps_(minCBR).mp3
http://samples.ffmpeg.org/archive/extension/mp3/mp3++mp3++mp3pro_CBR96kbps_(maxCBR).mp3
http://samples.ffmpeg.org/archive/extension/mp3/mp3++mp3++mp3pro_VBR50-60kbps_(minVBR).mp3
http://samples.ffmpeg.org/archive/extension/mp3/mp3++mp3++mp3pro_VBR95-150kbps_(maxVBR).mp3
http://samples.ffmpeg.org/archive/extension/mp3/mp3++mp3++mp3pro_VBR65-85kbps.mp3
$ ffmpeg -i mp3++mp3++mp3pro_VBR65-85kbps.mp3
ffmpeg version N-51059-gfbd3ee9 Copyright (c) 2000-2013 the FFmpeg developers
built on Mar 18 2013 10:50:51 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl
libavutil 52. 19.101 / 52. 19.101
libavcodec 55. 1.100 / 55. 1.100
libavformat 55. 0.100 / 55. 0.100
libavdevice 55. 0.100 / 55. 0.100
libavfilter 3. 47.103 / 3. 47.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[mp3 @ 0x2ef3a20] max_analyze_duration 5000000 reached at 5015510 microseconds
Input #0, mp3, from 'mp3++mp3++mp3pro_VBR65-85kbps.mp3':
Duration: 00:08:20.06, start: 0.000000, bitrate: 61 kb/s
Stream #0:0: Audio: mp3, 22050 Hz, stereo, s16p, 61 kb/s
At least one output file must be specified
Change History (2)
comment:1 by , 12 years ago
comment:2 by , 12 years ago
| Description: | modified (diff) |
|---|---|
| Keywords: | sbr added |
| Summary: | Support mp3pro → Support SBR layer in mp3pro |
Should be fixed, thank you!
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mp3pro is lossy, not lossless:
"mp3PRO is an audio compression algorithm (or codec) that combines the MP3 audio format with spectral band replication (SBR) compression methods. It claims to achieve transparency at lower bitrates than MP3, resulting in a file nearly half the size of standard MP3." wikipedia