[FFmpeg-trac] #8515(avcodec:new): vc1_parser erroneously flagged every packet as keyframe
FFmpeg
trac at avcodec.org
Sun Feb 9 15:30:50 EET 2020
#8515: vc1_parser erroneously flagged every packet as keyframe
-------------------------------------+-------------------------------------
Reporter: HolyWu | Type: defect
Status: new | Priority: normal
Component: avcodec | Version: git-
| master
Keywords: vc-1 parser | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Since the commit of
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/701e8b42e12ad625c64ceae2252acb1de390278c,
vc-1 parser erroneously flagged every packet as keyframe. If you recompile
the tool with that commit reverted, you will get the expected result.
The first shows the result with that commit. The second shows the result
without that commit.
{{{
$ ffprobe -pretty -show_packets vc1_sample.mkv
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=959
dts_time=0:00:00.959000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=9.016602 Kibyte
pos=5494
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1001
dts_time=0:00:01.001000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=14734
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1043
dts_time=0:00:01.043000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=16302
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1084
dts_time=0:00:01.084000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=17869
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1126
dts_time=0:00:01.126000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=17881
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1168
dts_time=0:00:01.168000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=19449
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1210
dts_time=0:00:01.210000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=21016
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1251
dts_time=0:00:01.251000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=21028
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1293
dts_time=0:00:01.293000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=22596
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1335
dts_time=0:00:01.335000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=24163
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1376
dts_time=0:00:01.376000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=24175
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1418
dts_time=0:00:01.418000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=25743
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1460
dts_time=0:00:01.460000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=27310
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1502
dts_time=0:00:01.502000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=27322
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1543
dts_time=0:00:01.543000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=28890
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1585
dts_time=0:00:01.585000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=30457
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1627
dts_time=0:00:01.627000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=30469
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1668
dts_time=0:00:01.668000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=32037
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1710
dts_time=0:00:01.710000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=33604
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1752
dts_time=0:00:01.752000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=33616
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1793
dts_time=0:00:01.793000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=35184
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1835
dts_time=0:00:01.835000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=36751
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1877
dts_time=0:00:01.877000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=36763
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1919
dts_time=0:00:01.919000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=38331
flags=K_
[/PACKET]
ffprobe version 4.2.git Copyright (c) 2007-2020 the FFmpeg developers
built with gcc 9.2.0 (Rev2, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --disable-doc --disable-
debug
libavutil 56. 39.100 / 56. 39.100
libavcodec 58. 68.100 / 58. 68.100
libavformat 58. 38.100 / 58. 38.100
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 75.100 / 7. 75.100
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, matroska,webm, from 'vc1_sample.mkv':
Metadata:
encoder : libebml v1.3.10 + libmatroska v1.5.2
creation_time : 2020-02-09T07:04:30.000000Z
Duration: 00:00:01.00, bitrate: 321 kb/s
Stream #0:0: Video: vc1 (Advanced) (WVC1 / 0x31435657),
yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr,
1k tbn, 47.95 tbc (default)
Metadata:
BPS-eng : 273405
DURATION-eng : 00:00:01.002000000
NUMBER_OF_FRAMES-eng: 24
NUMBER_OF_BYTES-eng: 34244
_STATISTICS_WRITING_APP-eng: mkvmerge v43.0.0 ('The Quartermaster')
64-bit
_STATISTICS_WRITING_DATE_UTC-eng: 2020-02-09 07:04:30
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
}}}
{{{
$ ffprobe -pretty -show_packets vc1_sample.mkv
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=959
dts_time=0:00:00.959000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=9.016602 Kibyte
pos=5494
flags=K_
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1001
pts_time=0:00:01.001000
dts=1001
dts_time=0:00:01.001000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=14734
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1043
pts_time=0:00:01.043000
dts=1043
dts_time=0:00:01.043000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=16302
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1084
dts_time=0:00:01.084000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=17869
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1126
pts_time=0:00:01.126000
dts=1126
dts_time=0:00:01.126000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=17881
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1168
pts_time=0:00:01.168000
dts=1168
dts_time=0:00:01.168000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=19449
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1210
dts_time=0:00:01.210000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=21016
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1251
pts_time=0:00:01.251000
dts=1251
dts_time=0:00:01.251000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=21028
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1293
pts_time=0:00:01.293000
dts=1293
dts_time=0:00:01.293000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=22596
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1335
dts_time=0:00:01.335000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=24163
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1376
pts_time=0:00:01.376000
dts=1376
dts_time=0:00:01.376000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=24175
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1418
pts_time=0:00:01.418000
dts=1418
dts_time=0:00:01.418000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=25743
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1460
dts_time=0:00:01.460000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=27310
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1502
pts_time=0:00:01.502000
dts=1502
dts_time=0:00:01.502000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=27322
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1543
pts_time=0:00:01.543000
dts=1543
dts_time=0:00:01.543000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=28890
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1585
dts_time=0:00:01.585000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=30457
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1627
pts_time=0:00:01.627000
dts=1627
dts_time=0:00:01.627000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=30469
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1668
pts_time=0:00:01.668000
dts=1668
dts_time=0:00:01.668000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=32037
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1710
dts_time=0:00:01.710000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=33604
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1752
pts_time=0:00:01.752000
dts=1752
dts_time=0:00:01.752000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=33616
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1793
pts_time=0:00:01.793000
dts=1793
dts_time=0:00:01.793000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=35184
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=N/A
pts_time=N/A
dts=1835
dts_time=0:00:01.835000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=5 byte
pos=36751
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1877
pts_time=0:00:01.877000
dts=1877
dts_time=0:00:01.877000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=36763
flags=__
[/PACKET]
[PACKET]
codec_type=video
stream_index=0
pts=1919
pts_time=0:00:01.919000
dts=1919
dts_time=0:00:01.919000
duration=41
duration_time=0:00:00.041000
convergence_duration=N/A
convergence_duration_time=N/A
size=1.524414 Kibyte
pos=38331
flags=__
[/PACKET]
ffprobe version 4.2.git Copyright (c) 2007-2020 the FFmpeg developers
built with gcc 9.2.0 (Rev2, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --disable-doc --disable-
debug
libavutil 56. 39.100 / 56. 39.100
libavcodec 58. 68.100 / 58. 68.100
libavformat 58. 38.100 / 58. 38.100
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 75.100 / 7. 75.100
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, matroska,webm, from 'vc1_sample.mkv':
Metadata:
encoder : libebml v1.3.10 + libmatroska v1.5.2
creation_time : 2020-02-09T07:04:30.000000Z
Duration: 00:00:01.00, bitrate: 321 kb/s
Stream #0:0: Video: vc1 (Advanced) (WVC1 / 0x31435657),
yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr,
1k tbn, 47.95 tbc (default)
Metadata:
BPS-eng : 273405
DURATION-eng : 00:00:01.002000000
NUMBER_OF_FRAMES-eng: 24
NUMBER_OF_BYTES-eng: 34244
_STATISTICS_WRITING_APP-eng: mkvmerge v43.0.0 ('The Quartermaster')
64-bit
_STATISTICS_WRITING_DATE_UTC-eng: 2020-02-09 07:04:30
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8515>
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