[FFmpeg-trac] #3956(ffmpeg:new): capturing with h264 codec with built-in hw c920 produce intermittent pause

FFmpeg trac at avcodec.org
Wed Sep 17 09:38:48 CEST 2014


#3956: capturing with h264 codec with built-in hw c920 produce intermittent pause
-------------------------------------+-------------------------------------
             Reporter:  gtzen        |                     Type:  defect
               Status:  new          |                 Priority:  critical
            Component:  ffmpeg       |                  Version:
             Keywords:  ffmpeg,      |  unspecified
  c920, copyinkf                     |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 While using a logitech c920 build-in hw codec to capture the video from
 webcam, it produces slight random intermittent pause in the captured video
 (that makes look like frames jump from one to another)

 How to reproduce:
 {{{
 % ffmpeg -report -s 1920x1080 -f v4l2 -vcodec h264 -i /dev/video0
 -copyinkf -vcodec copy test_directly_processed_by_c920-another-
 attempt1.mp4
 %cat ffmpeg-20140917-084550.log
 ffmpeg started on 2014-09-17 at 08:45:50
 Report written to "ffmpeg-20140917-084550.log"
 Command line:
 ffmpeg -report -s 1920x1080 -f v4l2 -vcodec h264 -i /dev/video0 -vcodec
 copy test_directly_processed_by_c920-another-attempt1.mp4
 ffmpeg version 2.4 Copyright (c) 2000-2014 the FFmpeg developers
   built on Sep 15 2014 01:02:34 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
   configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-
 avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3
 --enable-x11grab --enable-libpulse --enable-libopencore-amrnb --enable-
 libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb
 --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis
 --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex
 --enable-libass --enable-avisynth --enable-libsoxr
   libavutil      54.  7.100 / 54.  7.100
   libavcodec     56.  1.100 / 56.  1.100
   libavformat    56.  4.101 / 56.  4.101
   libavdevice    56.  0.100 / 56.  0.100
   libavfilter     5.  1.100 /  5.  1.100
   libavresample   2.  1.  0 /  2.  1.  0
   libswscale      3.  0.100 /  3.  0.100
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  0.100 / 53.  0.100
 Splitting the commandline.
 Reading option '-report' ... matched as option 'report' (generate a
 report) with argument '1'.
 Reading option '-s' ... matched as option 's' (set frame size (WxH or
 abbreviation)) with argument '1920x1080'.
 Reading option '-f' ... matched as option 'f' (force format) with argument
 'v4l2'.
 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec
 ('copy' to copy stream)) with argument 'h264'.
 Reading option '-i' ... matched as input file with argument '/dev/video0'.
 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec
 ('copy' to copy stream)) with argument 'copy'.
 Reading option 'test_directly_processed_by_c920-another-attempt1.mp4' ...
 matched as output file.
 Finished splitting the commandline.
 Parsing a group of options: global .
 Applying option report (generate a report) with argument 1.
 Successfully parsed a group of options.
 Parsing a group of options: input file /dev/video0.
 Applying option s (set frame size (WxH or abbreviation)) with argument
 1920x1080.
 Applying option f (force format) with argument v4l2.
 Applying option vcodec (force video codec ('copy' to copy stream)) with
 argument h264.
 Successfully parsed a group of options.
 Opening an input file: /dev/video0.
 [video4linux2,v4l2 @ 0x305a4e0] fd:4 capabilities:84000001
 [video4linux2,v4l2 @ 0x305a4e0] Current input_channel: 0, input_name:
 Camera 1, input_std: 0
 [h264 @ 0x305ae00] Current profile doesn't provide more RBSP data in PPS,
 skipping
 [video4linux2,v4l2 @ 0x305a4e0] All info found
 Input #0, video4linux2,v4l2, from '/dev/video0':
   Duration: N/A, start: 5317.791377, bitrate: N/A
     Stream #0:0, 8, 1/1000000: Video: h264 (Constrained Baseline),
 yuvj420p(pc), 1920x1080 [SAR 1:1 DAR 16:9], -4 kb/s, 24 fps, 24 tbr, 1000k
 tbn, 60 tbc
 Successfully opened the file.
 Parsing a group of options: output file test_directly_processed_by_c920
 -another-attempt1.mp4.
 Applying option vcodec (force video codec ('copy' to copy stream)) with
 argument copy.
 Successfully parsed a group of options.
 Opening an output file: test_directly_processed_by_c920-another-
 attempt1.mp4.
 Successfully opened the file.
 Output #0, mp4, to 'test_directly_processed_by_c920-another-attempt1.mp4':
   Metadata:
     encoder         : Lavf56.4.101
     Stream #0:0, 0, 1/1000000: Video: h264 ([33][0][0][0] / 0x0021),
 yuvj420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, -4 kb/s, 24 fps, 1000k
 tbn, 1000k tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
 Press [q] to stop, [?] for help
 [mp4 @ 0x3115fe0] Non-monotonous DTS in output stream 0:0; previous: 0,
 current: -214627; changing to 1. This may result in incorrect timestamps
 in the output file.
 [mp4 @ 0x3115fe0] Non-monotonous DTS in output stream 0:0; previous: 1,
 current: -174633; changing to 2. This may result in incorrect timestamps
 in the output file.
 [mp4 @ 0x3115fe0] Non-monotonous DTS in output stream 0:0; previous: 2,
 current: -130641; changing to 3. This may result in incorrect timestamps
 in the output file.
 [mp4 @ 0x3115fe0] Non-monotonous DTS in output stream 0:0; previous: 3,
 current: -90647; changing to 4. This may result in incorrect timestamps in
 the output file.
 [mp4 @ 0x3115fe0] Non-monotonous DTS in output stream 0:0; previous: 4,
 current: -50653; changing to 5. This may result in incorrect timestamps in
 the output file.
 [mp4 @ 0x3115fe0] Non-monotonous DTS in output stream 0:0; previous: 5,
 current: -6660; changing to 6. This may result in incorrect timestamps in
 the output file.
 [mp4 @ 0x3115fe0] Non-monotonous DTS in output stream 0:0; previous:
 449296, current: 310695; changing to 449297. This may result in incorrect
 timestamps in the output file.
 [mp4 @ 0x3115fe0] Non-monotonous DTS in output stream 0:0; previous:
 449297, current: 347879; changing to 449298. This may result in incorrect
 timestamps in the output file.
 frame=   20 fps=0.0 q=-1.0 size=     349kB time=00:00:00.44
 bitrate=6370.4kbits/s
 [mp4 @ 0x3115fe0] Non-monotonous DTS in output stream 0:0; previous:
 449298, current: 384674; changing to 449299. This may result in incorrect
 timestamps in the output file.
 [mp4 @ 0x3115fe0] Non-monotonous DTS in output stream 0:0; previous:
 449299, current: 421670; changing to 449300. This may result in incorrect
 timestamps in the output file.
 frame=   33 fps= 32 q=-1.0 size=     542kB time=00:00:01.07
 bitrate=4143.2kbits/s
 frame=   48 fps= 31 q=-1.0 size=     740kB time=00:00:01.48
 bitrate=4072.7kbits/s
 frame=   63 fps= 31 q=-1.0 size=     934kB time=00:00:01.94
 bitrate=3926.7kbits/s
 frame=   79 fps= 31 q=-1.0 size=    1137kB time=00:00:02.42
 bitrate=3847.8kbits/s
 frame=   94 fps= 31 q=-1.0 size=    1323kB time=00:00:03.14
 bitrate=3442.6kbits/s
 frame=  109 fps= 31 q=-1.0 size=    1497kB time=00:00:03.55
 bitrate=3449.2kbits/s
 frame=  124 fps= 30 q=-1.0 size=    1683kB time=00:00:04.00
 bitrate=3443.3kbits/s
 frame=  140 fps= 31 q=-1.0 size=    1878kB time=00:00:04.47
 bitrate=3435.2kbits/s
 frame=  155 fps= 30 q=-1.0 size=    2071kB time=00:00:04.92
 bitrate=3448.2kbits/s
 frame=  170 fps= 30 q=-1.0 size=    2259kB time=00:00:05.62
 bitrate=3287.6kbits/s
 frame=  185 fps= 30 q=-1.0 size=    2440kB time=00:00:06.06
 bitrate=3296.8kbits/s
 frame=  201 fps= 30 q=-1.0 size=    2632kB time=00:00:06.53
 bitrate=3298.7kbits/s
 frame=  216 fps= 30 q=-1.0 size=    2809kB time=00:00:06.97
 bitrate=3297.9kbits/s
 frame=  231 fps= 30 q=-1.0 size=    2993kB time=00:00:07.69
 bitrate=3184.7kbits/s
 frame=  246 fps= 30 q=-1.0 size=    3173kB time=00:00:08.10
 bitrate=3206.4kbits/s
 frame=  262 fps= 30 q=-1.0 size=    3370kB time=00:00:08.59
 bitrate=3213.1kbits/s
 frame=  277 fps= 30 q=-1.0 size=    3549kB time=00:00:09.03
 bitrate=3217.4kbits/s
 frame=  292 fps= 30 q=-1.0 size=    3735kB time=00:00:09.47
 bitrate=3227.6kbits/s
 [NULL @ 0x305ae00] Current profile doesn't provide more RBSP data in PPS,
 skipping
 frame=  307 fps= 30 q=-1.0 size=    3944kB time=00:00:10.17
 bitrate=3174.2kbits/s
 frame=  323 fps= 30 q=-1.0 size=    4140kB time=00:00:10.65
 bitrate=3184.8kbits/s
 frame=  338 fps= 30 q=-1.0 size=    4323kB time=00:00:11.09
 bitrate=3192.8kbits/s
 frame=  353 fps= 30 q=-1.0 size=    4507kB time=00:00:11.53
 bitrate=3200.8kbits/s
 frame=  369 fps= 30 q=-1.0 size=    4701kB time=00:00:12.27
 bitrate=3136.5kbits/s
 frame=  384 fps= 30 q=-1.0 size=    4886kB time=00:00:12.70
 bitrate=3149.6kbits/s
 frame=  399 fps= 30 q=-1.0 size=    5066kB time=00:00:13.15
 bitrate=3156.1kbits/s
 frame=  414 fps= 30 q=-1.0 size=    5250kB time=00:00:13.59
 bitrate=3163.7kbits/s
 frame=  430 fps= 30 q=-1.0 size=    5446kB time=00:00:14.06
 bitrate=3171.8kbits/s
 frame=  445 fps= 30 q=-1.0 size=    5631kB time=00:00:14.75
 bitrate=3125.5kbits/s
 frame=  460 fps= 30 q=-1.0 size=    5813kB time=00:00:15.20
 bitrate=3131.0kbits/s
 frame=  475 fps= 30 q=-1.0 size=    5995kB time=00:00:15.65
 bitrate=3138.1kbits/s
 frame=  491 fps= 30 q=-1.0 size=    6191kB time=00:00:16.12
 bitrate=3145.8kbits/s
 frame=  506 fps= 30 q=-1.0 size=    6376kB time=00:00:16.82
 bitrate=3104.0kbits/s
 frame=  521 fps= 30 q=-1.0 size=    6560kB time=00:00:17.26
 bitrate=3112.5kbits/s
 frame=  536 fps= 30 q=-1.0 size=    6742kB time=00:00:17.70
 bitrate=3118.7kbits/s
 frame=  552 fps= 30 q=-1.0 size=    6939kB time=00:00:18.18
 bitrate=3126.6kbits/s
 frame=  567 fps= 30 q=-1.0 size=    7122kB time=00:00:18.90
 bitrate=3086.8kbits/s
 frame=  582 fps= 30 q=-1.0 size=    7304kB time=00:00:19.30
 bitrate=3098.6kbits/s
 frame=  597 fps= 30 q=-1.0 size=    7487kB time=00:00:19.76
 bitrate=3103.0kbits/s
 [NULL @ 0x305ae00] Current profile doesn't provide more RBSP data in PPS,
 skipping
 frame=  613 fps= 30 q=-1.0 size=    7708kB time=00:00:20.23
 bitrate=3119.9kbits/s
 frame=  628 fps= 30 q=-1.0 size=    7868kB time=00:00:20.68
 bitrate=3116.8kbits/s
 frame=  643 fps= 30 q=-1.0 size=    8052kB time=00:00:21.38
 bitrate=3084.9kbits/s
 frame=  659 fps= 30 q=-1.0 size=    8246kB time=00:00:21.85
 bitrate=3091.2kbits/s
 frame=  674 fps= 30 q=-1.0 size=    8429kB time=00:00:22.29
 bitrate=3097.0kbits/s
 frame=  689 fps= 30 q=-1.0 size=    8612kB time=00:00:22.73
 bitrate=3102.7kbits/s
 frame=  704 fps= 30 q=-1.0 size=    8796kB time=00:00:23.45
 bitrate=3072.0kbits/s
 frame=  720 fps= 30 q=-1.0 size=    8991kB time=00:00:23.91
 bitrate=3080.6kbits/s
 frame=  735 fps= 30 q=-1.0 size=    9174kB time=00:00:24.35
 bitrate=3086.1kbits/s
 frame=  750 fps= 30 q=-1.0 size=    9359kB time=00:00:24.79
 bitrate=3091.8kbits/s
 frame=  765 fps= 30 q=-1.0 size=    9541kB time=00:00:25.23
 bitrate=3096.9kbits/s
 frame=  781 fps= 30 q=-1.0 size=    9737kB time=00:00:25.96
 bitrate=3072.4kbits/s
 frame=  796 fps= 30 q=-1.0 size=    9920kB time=00:00:26.41
 bitrate=3077.0kbits/s
 frame=  811 fps= 30 q=-1.0 size=   10103kB time=00:00:26.85
 bitrate=3082.0kbits/s
 frame=  826 fps= 30 q=-1.0 size=   10286kB time=00:00:27.29
 bitrate=3087.0kbits/s
 frame=  842 fps= 30 q=-1.0 size=   10481kB time=00:00:28.03
 bitrate=3062.7kbits/s
 frame=  857 fps= 30 q=-1.0 size=   10666kB time=00:00:28.46
 bitrate=3069.3kbits/s
 frame=  872 fps= 30 q=-1.0 size=   10848kB time=00:00:28.91
 bitrate=3073.8kbits/s
 frame=  887 fps= 30 q=-1.0 size=   11032kB time=00:00:29.35
 bitrate=3078.8kbits/s
 [NULL @ 0x305ae00] Current profile doesn't provide more RBSP data in PPS,
 skipping
 frame=  903 fps= 30 q=-1.0 size=   11257kB time=00:00:30.10
 bitrate=3062.6kbits/s
 frame=  918 fps= 30 q=-1.0 size=   11432kB time=00:00:30.51
 bitrate=3069.1kbits/s
 frame=  933 fps= 30 q=-1.0 size=   11593kB time=00:00:30.96
 bitrate=3066.6kbits/s
 frame=  949 fps= 30 q=-1.0 size=   11789kB time=00:00:31.44
 bitrate=3071.7kbits/s
 frame=  964 fps= 30 q=-1.0 size=   11972kB time=00:00:31.88
 bitrate=3075.8kbits/s
 frame=  967 fps= 30 q=-1.0 Lsize=   12021kB time=00:00:31.97
 bitrate=3079.8kbits/s
 video:12008kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.101403%
 Input file #0 (/dev/video0):
   Input stream #0:0 (video): 967 packets read (12296531 bytes);
   Total: 967 packets (12296531 bytes) demuxed
 Output file #0 (test_directly_processed_by_c920-another-attempt1.mp4):
   Output stream #0:0 (video): 967 packets muxed (12296531 bytes);
   Total: 967 packets (12296531 bytes) muxed
 0 frames successfully decoded, 0 decoding errors
 [AVIOContext @ 0x31153a0] Statistics: 34 seeks, 997 writeouts
 }}}

 Any input to overcome this? Thanks!

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3956>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker


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