Re: Issue 78915 in chromium: Add ADPCM support

[chro...@googlecode.com]

Updates:
Summary: Add ADPCM support
Labels: -Pri-2 -Feature-Media-Network -Hotlist-GoodFirstBug Pri-3
Feature-Media-FFmpeg

Comment #13 on issue 78915 by sche...@chromium.org: Add ADPCM support
http://code.google.com/p/chromium/issues/detail?id=78915

Took a look at the file:
$ out/ffmpeg -i ../media/crbug78915.wav
ffmpeg version N-48750-g969e75e Copyright (c) 2000-2013 the FFmpeg
developers
built on Jan 11 2013 10:58:56 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
configuration:
libavutil 52. 13.100 / 52. 13.100
libavcodec 54. 86.100 / 54. 86.100
libavformat 54. 59.107 / 54. 59.107
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 32.100 / 3. 32.100
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, wav, from '../media/crbug78915.wav':
Duration: 00:00:02.37, bitrate: 32 kb/s
Stream #0:0: Audio: adpcm_ms ([2][0][0][0] / 0x0002), 8000 Hz, mono,
s16, 32 kb/s
At least one output file must be specified



... looks like it's actually adpcm_ms!

[chro...@googlecode.com]

Updates:
Cc: agottip...@chromium.org dalecur...@chromium.org i...@chromium.org
kr...@chromium.org rohi...@chromium.org

Comment #14 on issue 78915 by sche...@chromium.org: Add ADPCM support
http://code.google.com/p/chromium/issues/detail?id=78915

Issue chromium-os:36620 has been merged into this issue.

[chro...@googlecode.com]

Comment #15 on issue 78915 by sche...@chromium.org: Add ADPCM support
http://code.google.com/p/chromium/issues/detail?id=78915

FYI chromium-os:36620 contains a sample clip

[chro...@googlecode.com]

Comment #19 on issue 78915 by sabei...@chromium.org: Add ADPCM support
https://code.google.com/p/chromium/issues/detail?id=78915

The problem is still reproducible with chrome 40 with both adpcm_ima_wav
and adpcm_ms (while they play correctly in mplayer)

$ ffmpeg -i sample.mp3 -acodec adpcm_ima_wav adpcm_ima_wav.wav
$ mediainfo adpcm_ima_wav.wav
...
Audio
Format : ADPCM
Codec ID : 11
Codec ID/Hint : Intel
$ mplayer adpcm_ima_wav.wav
...
Selected audio codec: [ffadpcmimawav] afm: ffmpeg (FFmpeg WAV IMA ADPCM
audio)

$ ffmpeg -i sample.mp3 -acodec adpcm_ms adpcm_ms.wav
$ mediainfo adpcm_ms.wav
...
Audio
Format : ADPCM
Codec ID : 2
$ mplayer adpcm_ms.wav
...
Selected audio codec: [ffadpcmimawav] afm: ffmpeg (FFmpeg WAV IMA ADPCM
audio)


Last comment from bug 363875 suggests we are not compiling ffmpeg with
adpcm support.

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[chro...@googlecode.com]

Comment #21 on issue 78915 by sabei...@chromium.org: Add ADPCM support
https://code.google.com/p/chromium/issues/detail?id=78915

A typo in my comment:
$ mplayer adpcm_ms.wav
...
Selected audio codec: [ffadpcmms] afm: ffmpeg (FFmpeg MS ADPCM audio)