[libav-bugs] [Bug 520] New: libschroedinger encoding is broken

bugzilla-daemon at aruru.libav.org bugzilla-daemon at aruru.libav.org
Tue May 21 11:00:22 CEST 2013


https://bugzilla.libav.org/show_bug.cgi?id=520

           Summary: libschroedinger encoding is broken
           Product: Libav
           Version: 9
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: general
        AssignedTo: bugzilla at libav.org
        ReportedBy: nikoli at lavabit.com


Encoding to dirac with libschroedinger is broken: when playing encoded files
first frame is decoded fine, then avplay shows grey screen.
Used schroedinger-1.0.10 + orc-0.4.16.
lu_zero reproduced bug with my sample.


$ time avconv -i avconv_dirac_sample.mkv -ss 100 -t 60 -codec:v libschroedinger
-codec:a libvorbis t3.mkv
avconv version 9.6, Copyright (c) 2000-2013 the Libav developers
  built on May 21 2013 02:48:54 with gcc 4.6.3 (Gentoo Hardened 4.6.3 p1.13,
pie-0.5.2)
Input #0, matroska,webm, from 'avconv_dirac_sample.mkv':
  Duration: 00:04:29.56, start: 0.000000, bitrate: N/A
    Stream #0.0: Video: h264 (High), yuv420p, 688x576, PAR 172:121 DAR
1849:1089, 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
    Stream #0.1(eng): Audio: aac, 48000 Hz, 5.1, fltp
File 't3.mkv' already exists. Overwrite ? [y/N] y
Output #0, matroska, to 't3.mkv':
  Metadata:
    encoder         : Lavf54.20.3
    Stream #0.0: Video: libschroedinger, yuv420p, 688x576 [PAR 172:121 DAR
1849:1089], q=2-31, 200 kb/s, 1k tbn, 1k tbc (default)
    Stream #0.1(eng): Audio: libvorbis, 48000 Hz, 5.1, fltp
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libschroedinger)
  Stream #0:1 -> #0:1 (aac -> libvorbis)
Press ctrl-c to stop encoding
frame= 1500 fps= 20 q=0.0 Lsize=    2036kB time=1.50 bitrate=11125.6kbits/s   
ts/s    
video:224kB audio:1761kB global headers:7kB muxing overhead 2.209357%

real    1m18.278s
user    2m56.917s
sys     0m1.516s
$ avplay t3.mkv 
avplay version 9.6, Copyright (c) 2003-2013 the Libav developers
  built on May 21 2013 02:48:54 with gcc 4.6.3 (Gentoo Hardened 4.6.3 p1.13,
pie-0.5.2)
Input #0, matroska,webm, from 't3.mkv':
  Metadata:
    ENCODER         : Lavf54.20.3
  Duration: 00:01:00.00, start: 0.000000, bitrate: N/A
    Stream #0.0: Video: libschroedinger, yuv420p, 688x576, PAR 71:50 DAR
3053:1800, 1k fps, 1k tbr, 1k tbn, 1k tbc (default)
    Stream #0.1(eng): Audio: vorbis, 48000 Hz, 5.1, fltp (default)
ALSA lib pcm.c:7339:(snd_pcm_recover) underrun occurred0B f=10/0   =0/0   
   2.71 A-V:  1.335 s:65.4 aq=  320KB vq=   30KB sq=    0B f=337/0

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