Public bug reported: Binary package hint: ffmpeg
libvpx will drop frames by default (without the user to notice) when the bitrate is set too low. You can recreate this bug by simply invoking ffmpeg -i someDVD.vob test.webm and analyzing the resulting webm file by mkvinfo -v test.webm | fgrep "Track Nummer 1" | less usually the frame dropping starts around 14s. This can cumulate in a file which contains every (second) frame as a key frame. The following web page contains information about the problem and hints to the fixing commit: https://groups.google.com/a/webmproject.org/group/webm-discuss/browse_thread/thread/7152b4a42825530 The following upstream patch fixes this (and came after the 0.6 release) http://git.ffmpeg.org/?p=ffmpeg;a=commitdiff;h=b82e38a409e329718c256f25ac25da0222790b24;hp=a8d597ab7b8dcdc1bb22e6ba4115e99eee7e50ad I consider this bug critical to the reputation of webm if ffmpeg is used naively. ProblemType: Bug DistroRelease: Ubuntu 10.04 Package: ffmpeg 4:0.6-2ubuntu2 ProcVersionSignature: Ubuntu 2.6.32-24.39-generic 2.6.32.15+drm33.5 Uname: Linux 2.6.32-24-generic i686 NonfreeKernelModules: fglrx wl Architecture: i386 Date: Mon Aug 23 19:42:40 2010 ProcEnviron: PATH=(custom, user) LANG=de_DE.utf8 SHELL=/bin/bash SourcePackage: ffmpeg ** Affects: ffmpeg (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 maverick -- cannot prevent webm encoding from dropping frames (and default) https://bugs.launchpad.net/bugs/622895 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
