Hi list, I am having strange problems encoding audio files using libvorbis: I use a command like this
avconv -i input.flv -acodec libvorbis -aq 3 -vn output.ogg to get the audio stream of a video file encoded as ogg. However, opening the resulting ogg file in VLC reveals strange seeking problems: The current timestamp as shown by VLC is updated only every 2 seconds, and if I click somewhere in the seek bar it takes up to 1 second for VLC to continue playing. If however I open the ogg file in Audacity and re-export it to an ogg file, the ogg file created will not have such problems. The seek bar and current timestamp is updated smoothly, and seeking works without noticeable delay. The same holds for ogg files created using the KDE audiocd: KIO-slave, which internally directly uses libvorbis. Is this a problem in the file, or in VLC? Amarok using the VLC backend has the same problem, using the gstreamer backend, both files work smoothly. What do Audacity and the KIO slave do differently than avconv, and is there any command-line option I could use to change that? I am using Debian testing: $ avconv -version avconv version 0.8.2-6:0.8.2-2, Copyright (c) 2000-2011 the Libav developers built on May 16 2012 21:00:23 with gcc 4.7.0 avconv 0.8.2-6:0.8.2-2 libavutil 51. 22. 1 / 51. 22. 1 libavcodec 53. 35. 0 / 53. 35. 0 libavformat 53. 21. 0 / 53. 21. 0 libavdevice 53. 2. 0 / 53. 2. 0 libavfilter 2. 15. 0 / 2. 15. 0 libswscale 2. 1. 0 / 2. 1. 0 libpostproc 52. 0. 0 / 52. 0. 0 $ vlc --version VLC media player 2.0.1 Twoflower (revision 2.0.1-0-gf432547) VLC version 2.0.1 Twoflower (2.0.1-0-gf432547) Compiled by buildd on brahms.debian.org (May 14 2012 23:08:19) Compiler: gcc version 4.7.0 (Debian 4.7.0-8) Kind regards, Ralf PS: Please keep me CC'ed in replies. PPS: The avconv manpage mentions the "ff* tools" in the Demuxers section. Looks like a leftover from the tool renaming ;-) _______________________________________________ libav-tools mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-tools
