[FFmpeg-trac] #5346(avcodec:new): H264 seeking shows incomplete frames
FFmpeg
trac at avcodec.org
Thu Mar 17 11:20:01 CET 2016
#5346: H264 seeking shows incomplete frames
-------------------------------------+-------------------------------------
Reporter: cehoyos | Owner:
Type: defect | Status: new
Priority: important | Component: avcodec
Version: git- | Keywords: h264 seek
master | regression
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
-------------------------------------+-------------------------------------
A user uploaded a H264 sample that shows artefacts on seeking since
78265fcfeee153e5e26ad4dbc7831a84ade447d6
{{{
$ ffmpeg -ss 1 -i Tennis_test_recording_cut.m2ts -qscale 2 -vframes 8
out.avi
ffmpeg version N-79068-g6b7ce0e Copyright (c) 2000-2016 the FFmpeg
developers
built with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl
libavutil 55. 19.100 / 55. 19.100
libavcodec 57. 28.103 / 57. 28.103
libavformat 57. 28.102 / 57. 28.102
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 39.102 / 6. 39.102
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, mpegts, from 'Tennis_test_recording_cut.m2ts':
Duration: 00:00:01.47, start: 0.387044, bitrate: 13949 kb/s
Program 1
Stream #0:0[0x1011]: Video: h264 (Main) (HDMV / 0x564D4448),
yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 30.39 fps, 29.97 tbr,
90k tbn, 59.94 tbc
Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo,
fltp, 384 kb/s
Please use -q:a or -q:v, -qscale is ambiguous
Output #0, avi, to 'out.avi':
Metadata:
ISFT : Lavf57.28.102
Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1920x1080 [SAR
1:1 DAR 16:9], q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
Metadata:
encoder : Lavc57.28.103 mpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp,
192 kb/s
Metadata:
encoder : Lavc57.28.103 ac3
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
Stream #0:1 -> #0:1 (ac3 (native) -> ac3 (native))
Press [q] to stop, [?] for help
[h264 @ 0x34bf9c0] mmco: unref short failure
[h264 @ 0x34788c0] mmco: unref short failure
[h264 @ 0x34317c0] error while decoding MB 23 33, bytestream -10
frame= 8 fps=0.0 q=2.0 Lsize= 2161kB time=00:00:00.33
bitrate=53064.7kbits/s speed=2.02x
video:2146kB audio:5kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.472254%
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5346>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list