[FFmpeg-trac] #4322(avcodec:new): skip_alpha breaks ffv1 decoding

FFmpeg trac at avcodec.org
Mon Feb 23 02:29:00 CET 2015


#4322: skip_alpha breaks ffv1 decoding
--------------------------------------+------------------------------------
               Reporter:  cehoyos     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  normal      |              Component:  avcodec
                Version:  git-master  |               Keywords:  ffv1 alpha
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+------------------------------------
 {{{
 $ ffmpeg -f lavfi -i testsrc -pix_fmt yuva420p -vcodec ffv1 -t 1 out.avi
 }}}
 {{{
 $ ffmpeg -skip_alpha 1 -i out.avi -f null -
 ffmpeg version N-69945-g2280552 Copyright (c) 2000-2015 the FFmpeg
 developers
   built with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      54. 18.100 / 54. 18.100
   libavcodec     56. 22.100 / 56. 22.100
   libavformat    56. 22.100 / 56. 22.100
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 11.100 /  5. 11.100
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  3.100 / 53.  3.100
 Input #0, avi, from 'out.avi':
   Metadata:
     encoder         : Lavf56.22.100
   Duration: 00:00:01.00, start: 0.000000, bitrate: 871 kb/s
     Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv420p, 320x240, 855
 kb/s, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 25 tbn, 25 tbc
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf56.22.100
     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240
 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
     Metadata:
       encoder         : Lavc56.22.100 rawvideo
 Stream mapping:
   Stream #0:0 -> #0:0 (ffv1 (native) -> rawvideo (native))
 Press [q] to stop, [?] for help
 [null @ 0x3584100] Encoder did not produce proper pts, making some up.
 [ffv1 @ 0x3575560] Invalid change of global parameters
 [ffv1 @ 0x3576360] Cannot decode non-keyframe without valid keyframe
 [ffv1 @ 0x357bfc0] Cannot decode non-keyframe without valid keyframe
 [ffv1 @ 0x357e8e0] Cannot decode non-keyframe without valid keyframe
 [ffv1 @ 0x3564100] Cannot decode non-keyframe without valid keyframe
 [ffv1 @ 0x3566f20] Cannot decode non-keyframe without valid keyframe
 [ffv1 @ 0x3589cc0] Cannot decode non-keyframe without valid keyframe
 Error while decoding stream #0:0: Invalid data found when processing input
 [ffv1 @ 0x3570040] Cannot decode non-keyframe without valid keyframe
 Error while decoding stream #0:0: Invalid data found when processing input
 [ffv1 @ 0x3572960] Cannot decode non-keyframe without valid keyframe
 Error while decoding stream #0:0: Invalid data found when processing input
 [ffv1 @ 0x3575560] Cannot decode non-keyframe without valid keyframe
 Error while decoding stream #0:0: Invalid data found when processing input
 [ffv1 @ 0x3576360] Cannot decode non-keyframe without valid keyframe
 Error while decoding stream #0:0: Invalid data found when processing input
 [ffv1 @ 0x357bfc0] Cannot decode non-keyframe without valid keyframe
 Error while decoding stream #0:0: Invalid data found when processing input
 [ffv1 @ 0x357e8e0] Invalid change of global parameters
 frame=   12 fps=0.0 q=0.0 Lsize=N/A time=00:00:00.48 bitrate=N/A
 video:1kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4322>
FFmpeg <https://ffmpeg.org>
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