Control: tag -1 moreinfo upstream On Tue, Mar 4, 2014 at 4:33 PM, Juergen Pfennig <i...@j-pfennig.de> wrote: > Package: libav-tools > Version: 6:0.8.10-1 > Severity: normal > File: /usr/bin/avconv > > Dear Maintainer, > > today I tried to convert DVD data (with 5.1 ac3 sound) to some smaller > mp4. I learned that there is almost no way to keep 5.1 sound. The best I > could get was downmixing to stereo (using -ac 2). Here is input/output > from my 1st try [I still believe that it should work out of the box > without having to add spurious parameters like -c:a ac3_fixed -b:a 448]: > > -START------------------------------------------------------------------------------- > local@peter0:~$ avconv -loglevel info -ss 6 -i > "concat:/mnt/xxx/VIDEO_TS/VTS_01_1.VOB|/mnt/xxx/VIDEO_TS/VTS_01_2.VOB|/mnt/xxx/VIDEO_TS/VTS_01_3.VOB|/mnt/xxx/VIDEO_TS/VTS_01_4.VOB|/mnt/xxx/VIDEO_TS/VTS_01_5.VOB" > -vf yadif -c:v mpeg4 -c:a ac3 -aspect 16:9 -async 1000 -threads 2 > -strict 1 -b:v 2M -bt 18M -f mp4 -y x.mp4 > avconv version 0.8.10-6:0.8.10-1, Copyright (c) 2000-2013 the Libav > developers > built on Feb 5 2014 03:52:19 with gcc 4.7.2 > [mpeg @ 0x189a300] max_analyze_duration reached > Input #0, mpeg, from > 'concat:/mnt/xxx/VIDEO_TS/VTS_01_1.VOB|/mnt/xxx/VIDEO_TS/VTS_01_2.VOB|/mnt/xxx/VIDEO_TS/VTS_01_3.VOB|/mnt/xxx/VIDEO_TS/VTS_01_4.VOB|/mnt/xxx/VIDEO_TS/VTS_01_5.VOB': > Duration: 02:52:59.55, start: 0.287267, bitrate: 3593 kb/s > Stream #0.0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [PAR > 64:45 DAR 16:9], 8490 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc > Stream #0.1[0x82]: Audio: ac3, 48000 Hz, 5.1, s16, 384 kb/s > [buffer @ 0x18a1f00] w:720 h:576 pixfmt:yuv420p > [yadif @ 0x18a26c0] mode:0 parity:-1 auto_enable:0 > Incompatible sample format 's16' for codec 'ac3', auto-selecting format > 'flt' > [ac3 @ 0x189bec0] invalid bit rate > Output #0, mp4, to 'x.mp4': > Stream #0.0: Video: mpeg4, yuv420p, 720x576 [PAR 64:45 DAR 16:9], > q=2-31, 2000 kb/s, 90k tbn, 25 tbc > Stream #0.1: Audio: ac3, 48000 Hz, 5.1, flt, 200 kb/s > Stream mapping: > Stream #0:0 -> #0:0 (mpeg2video -> mpeg4) > Stream #0:1 -> #0:1 (ac3 -> ac3) > Error while opening encoder for output stream #0:1 - maybe incorrect > parameters such as bit_rate, rate, width or height > -END----------------------------------------------------------------------------------
I'm sorry for taking so much time to get back to you. This really seems like a usability issue to me. I agree that the error messages and the user-interface could always be better. Would you please mind discussing this with upstream? Please follow the instructions at https://libav.org/bugreports.html and report back with the bugzilla number. > I do not want to flood you with too many bug reports, but avconv (or > avlib?) is not fit for practical use. [...] I will switch away completely from > ffmpeg/avlib. Can I take that you are not interested in testing new versions of libav/avconv? Best, Reinhard _______________________________________________ pkg-multimedia-maintainers mailing list pkg-multimedia-maintainers@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-multimedia-maintainers
