[FFmpeg-trac] #1901(avcodec:open): cavs artefacts in B frames

FFmpeg trac at avcodec.org
Thu Jun 26 17:16:27 CEST 2014


#1901: cavs artefacts in B frames
------------------------------------+-----------------------------------
             Reporter:  ligw_hf     |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  minor       |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  cavs        |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  1           |
------------------------------------+-----------------------------------
Changes (by cehoyos):

 * priority:  normal => minor
 * component:  undetermined => avcodec


Comment:

 The ugly artefacts were fixed by Yao Wang in e18b48c6
 Many warnings are still shown when decoding the sample.
 {{{
 $ ffmpeg -i stream.avs -t 2 out.avi
 ffmpeg version N-64227-ge18b48c Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Jun 26 2014 17:11:49 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      52. 90.101 / 52. 90.101
   libavcodec     55. 68.100 / 55. 68.100
   libavformat    55. 44.100 / 55. 44.100
   libavdevice    55. 13.101 / 55. 13.101
   libavfilter     4.  9.100 /  4.  9.100
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 19.100 /  0. 19.100
   libpostproc    52.  3.100 / 52.  3.100
 [cavs @ 0x2525740] weighted prediction not yet supported
 [cavs @ 0x2525740] no frame decoded
 Input #0, cavsvideo, from 'stream.avs':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: cavs, yuv420p, 720x576, 25 fps, 25 tbr, 1200k tbn,
 25 tbc
 [avi @ 0x2527720] Using AVStream.codec.time_base as a timebase hint to the
 muxer is deprecated. Set AVStream.time_base instead.
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf55.44.100
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 720x576,
 q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
     Metadata:
       encoder         : Lavc55.68.100 mpeg4
 Stream mapping:
   Stream #0:0 -> #0:0 (cavs (native) -> mpeg4 (native))
 Press [q] to stop, [?] for help
 [cavs @ 0x2526aa0] weighted prediction not yet supported
 [cavs @ 0x2526aa0] no frame decoded
     Last message repeated 12 times
 [cavs @ 0x2526aa0] weighted prediction not yet supported
 [cavs @ 0x2526aa0] no frame decoded
     Last message repeated 12 times
 [cavs @ 0x2526aa0] weighted prediction not yet supported
 [cavs @ 0x2526aa0] no frame decoded
     Last message repeated 12 times
 [cavs @ 0x2526aa0] weighted prediction not yet supported
 [cavs @ 0x2526aa0] no frame decoded
     Last message repeated 11 times
 frame=   49 fps=0.0 q=24.8 Lsize=     190kB time=00:00:02.00 bitrate=
 779.2kbits/s
 video:183kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 3.678040%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/1901#comment:6>
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