[libav-bugs] [Bug 385] New: Converting a video to webm (libvpx, libtheora) alters the duration
bugzilla-daemon at aruru.libav.org
bugzilla-daemon at aruru.libav.org
Thu Oct 25 10:55:34 CEST 2012
https://bugzilla.libav.org/show_bug.cgi?id=385
Summary: Converting a video to webm (libvpx, libtheora) alters
the duration
Product: Libav
Version: git HEAD
Platform: All
OS/Version: Linux
Status: NEW
Severity: normal
Priority: Normal
Component: utilities
AssignedTo: bugzilla at libav.org
ReportedBy: desantis.maurizio at gmail.com
On an Ubuntu 12.10 x64, avconv compiled from git master
Some videos I have, when converted to webm, have an altered duration. Not all
videos, just some, but I didn't understand why just some.
This doesn't happen with avconv from the distro package (libav-tools), which
sets the right duration.
I attach the input video to this report.
avprobe of the input:
avprobe version a6e9d64, Copyright (c) 2007-2012 the Libav developers
built on Oct 25 2012 10:27:35 with gcc 4.7 (Ubuntu/Linaro 4.7.2-2ubuntu1)
[flv @ 0x1c60860] max_analyze_duration reached
Input #0, flv, from 'input.flv':
Metadata:
starttime : 0
totalduration : 38
totaldatarate : 521
bytelength : 2482952
canseekontime : true
sourcedata : B400F7E0AHH1348065349856294
purl :
pmsg :
encoder : Lavf53.21.0
Duration: 00:00:38.17, start: 0.000000, bitrate: N/A
Stream #0.0: Video: flv, yuv420p, 426x240, 200 kb/s, 29.97 fps, 29.97 tbr,
1k tbn
Stream #0.1: Audio: adpcm_swf, 44100 Hz, 1 channels, s16, 176 kb/s
# avprobe output
avprobe of the output:
avprobe version a6e9d64, Copyright (c) 2007-2012 the Libav developers
built on Oct 25 2012 10:27:35 with gcc 4.7 (Ubuntu/Linaro 4.7.2-2ubuntu1)
Input #0, matroska,webm, from 'output.webm':
Duration: 00:00:39.12, start: 0.000000, bitrate: N/A
Stream #0.0: Video: vp8, yuv420p, 426x240, PAR 1:1 DAR 71:40, 1k fps, 1k
tbr, 1k tbn (default)
Stream #0.1: Audio: vorbis, 44100 Hz, mono, s16 (default)
# avprobe output
Output of LD_LIBRARY_PATH=/opt/libav/lib /opt/libav/bin/avconv -y -v 9
-loglevel 99 -i input.flv output.webm :
http://pastebin.com/VLBKU6zp
(I didn't paste the output right here because when submitting the bug I was
blocked by a message which sad "Comment cannot contain more the 65365
characters", something like this)
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