#3954: Remuxing vorbis into AVI leads to very large files
-------------------------------------+-------------------------------------
Reporter: ubitux | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: | undetermined
unspecified | Keywords: avi vorbis
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
-------------------------------------+-------------------------------------
Create a small OGG/Vorbis file:
{{{
☭ ./ffmpeg -f lavfi -i sine -c:v libvorbis -t 100 out.ogg
ffmpeg version N-66293-g5ddfac8 Copyright (c) 2000-2014 the FFmpeg
developers
built on Sep 16 2014 14:01:03 with gcc 4.9.1 (GCC)
configuration: --enable-gpl --enable-libfribidi --enable-fontconfig
--enable-libfreetype --enable-libx264 --enable-libvorbis --enable-
libmp3lame --enable-libmodplug --enable-libass --assert-level=2
--samples=/home/ux/fate-samples --cc='ccache cc'
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Input #0, lavfi, from 'sine':
Duration: N/A, start: 0.000000, bitrate: 705 kb/s
Stream #0:0: Audio: pcm_s16le, 44100 Hz, mono, s16, 705 kb/s
Output #0, ogg, to 'out.ogg':
Metadata:
encoder : Lavf56.4.101
Stream #0:0: Audio: vorbis (libvorbis), 44100 Hz, mono, fltp
Metadata:
encoder : Lavc56.1.100 libvorbis
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le (native) -> vorbis (libvorbis))
Press [q] to stop, [?] for help
size= 170kB time=00:01:40.00 bitrate= 14.0kbits/s
video:0kB audio:160kB subtitle:0kB other streams:0kB global headers:3kB
muxing overhead: 6.276714%
}}}
Remux it to AVI:
{{{
☭ ./ffmpeg -i out.ogg -c copy out.avi
ffmpeg version N-66293-g5ddfac8 Copyright (c) 2000-2014 the FFmpeg
developers
built on Sep 16 2014 14:01:03 with gcc 4.9.1 (GCC)
configuration: --enable-gpl --enable-libfribidi --enable-fontconfig
--enable-libfreetype --enable-libx264 --enable-libvorbis --enable-
libmp3lame --enable-libmodplug --enable-libass --assert-level=2
--samples=/home/ux/fate-samples --cc='ccache cc'
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Input #0, ogg, from 'out.ogg':
Duration: 00:01:40.00, start: 0.000000, bitrate: 13 kb/s
Stream #0:0: Audio: vorbis, 44100 Hz, mono, fltp, 80 kb/s
Metadata:
ENCODER : Lavc56.1.100 libvorbis
Output #0, avi, to 'out.avi':
Metadata:
ISFT : Lavf56.4.101
Stream #0:0: Audio: vorbis (oV[0][0] / 0x566F), 44100 Hz, mono, 80
kb/s
Metadata:
ENCODER : Lavc56.1.100 libvorbis
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
size= 23610kB time=00:01:39.99 bitrate=1934.2kbits/s
video:0kB audio:160kB subtitle:0kB other streams:0kB global headers:3kB
muxing overhead: 14616.299805%
}}}
Compare sizes:
{{{
☭ ls -l out.{ogg,avi}
-rw-r--r-- 1 ux ux 24M Sep 16 14:04 out.avi
-rw-r--r-- 1 ux ux 171K Sep 16 14:01 out.ogg
}}}
{{{out.avi}}} seems to play fine. I don't know if it's a regression.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/3954>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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