Package: libav-tools Version: 6:10.1-1 Severity: normal Take for example the video at http://player.ooyala.com/player/ipad/NoMndlbDpMPxEDCuGI2hYTcaQwVSQUBO.m3u8?js=1 (originally from http://www.aopa.org/Education/Safety-Videos.aspx?ipp=100) It is served over applehttp through ooyala.
It has 5 variants of differing encoding, resolution and bitrate, *but* among same resolution (and encoding), there are sometimes multiple bitrate choices. For example: Program 0 Metadata: variant_bitrate : 1230000 Stream #0.0: Video: h264 (High), yuv420p, 1280x720 [PAR 1:1 DAR 16:9], 23.98 fps, 90k tbn, 47.95 tbc Metadata: variant_bitrate : 1230000 Stream #0.1: Audio: aac, 44100 Hz, stereo, fltp, 133 kb/s Metadata: variant_bitrate : 1230000 (...) Program 3 Metadata: variant_bitrate : 1746000 Stream #0.6: Video: h264 (High), yuv420p, 1280x720 [PAR 1:1 DAR 16:9], 23.98 fps, 90k tbn, 47.95 tbc Metadata: variant_bitrate : 1746000 Stream #0.7: Audio: aac, 44100 Hz, stereo, fltp, 133 kb/s Metadata: variant_bitrate : 1746000 Program 4 Metadata: variant_bitrate : 2798000 Stream #0.8: Video: h264 (High), yuv420p, 1280x720 [PAR 1:1 DAR 16:9], 23.98 fps, 90k tbn, 47.95 tbc Metadata: variant_bitrate : 2798000 Stream #0.9: Audio: aac, 44100 Hz, stereo, fltp, 133 kb/s Metadata: variant_bitrate : 2798000 "Program 4" is better than "Program 0", but avconv selects "Program 0", probably because it is the first among the ones that have highest resolution (Program 1 and 2 have resolution 480x270 and 640x360, respectively, and have ' h264 (Constrained Baseline)' video). The avconf manpage says: By default avconv tries to pick the "best" stream of each type present in input files and add them to each output file. For video, this means the highest resolution, (...) That's a good start, but to handle the above scenario well, please change avconv to select the highest bitrate among the videos that have the same (highest) resolution. About audio, I suppose it would be best to (by default) favour the audio that comes with the selected "best" Program. -- System Information: Debian Release: jessie/sid APT prefers testing-updates APT policy: (600, 'testing-updates'), (600, 'testing'), (300, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 3.14-1-amd64 (SMP w/8 CPU cores) Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages libav-tools depends on: ii dpkg 1.17.10 ii libavcodec55 6:10.1-1 ii libavdevice54 6:10.1-1 ii libavfilter4 6:10.1-1 ii libavformat55 6:10.1-1 ii libavresample1 6:10.1-1 ii libavutil53 6:10.1-1 ii libbz2-1.0 1.0.6-5 ii libc6 2.19-4 ii libgnutls26 2.12.23-16 ii libgsm1 1.0.13-4 ii libmp3lame0 3.99.5+repack1-3 ii libopenjpeg5 1.5.2-2 ii libopus0 1.1-1 ii librtmp1 2.4+20131018.git79459a2-2 ii libschroedinger-1.0-0 1.0.11-2 ii libsdl1.2debian 1.2.15-9 ii libspeex1 1.2~rc1.1-1 ii libswscale2 6:10.1-1 ii libtheora0 1.1.1+dfsg.1-3.2 ii libva1 1.3.1-3 ii libvdpau1 0.7-2 ii libvorbis0a 1.3.2-1.4 ii libvorbisenc2 1.3.2-1.4 ii libvpx1 1.3.0-2 ii libx11-6 2:1.6.2-2 ii libx264-142 2:0.142.2389+git956c8d8-5 ii libxvidcore4 2:1.3.3-1 ii zlib1g 1:1.2.8.dfsg-1 libav-tools recommends no packages. Versions of packages libav-tools suggests: pn frei0r-plugins <none> -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org