[FFmpeg-trac] #568(FFmpeg:new): H264 frame drop with the drop of one slice
FFmpeg
trac at avcodec.org
Mon Oct 17 21:44:55 CEST 2011
#568: H264 frame drop with the drop of one slice
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Reporter: hardiksharma | Owner: michael
Type: defect | Status: new
Priority: normal | Component: FFmpeg
Version: unspecified | Keywords:
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
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I am trying to transcode from .264 to yuv format.
I dropped slices (one by one) in h264 file format and then decoded the
.264 to yuv format. During decoding, decoder is dropping the respective
frame if I drop the header slice/first slice of the frame. Happening for P
and B both.
Command line to decode- ffmpeg -b:v 512k -r 30 -i error_$sliceno.264 -b:v
512k -x264opts sar=352:288 -r 30 -y decode_$sliceno.yuv
ffmpeg -v 9 -loglevel 99 -i error_51.264
ffmpeg version N-33472-gfbb8468, Copyright (c) 2000-2011 the FFmpeg
developers
built on Oct 10 2011 18:37:07 with gcc 4.4.5
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora
--enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree
--enable-postproc --enable-version3 --enable-x11grab
libavutil 51. 20. 1 / 51. 20. 1
libavcodec 53. 20. 0 / 53. 20. 0
libavformat 53. 15. 0 / 53. 15. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 43. 6 / 2. 43. 6
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0
[h264 @ 0x9f1cac0] Format h264 probed with size=2048 and score=51
[h264 @ 0x9f22d20] no picture
[h264 @ 0x9f22d20] concealing 47 DC, 47 AC, 47 MV errors
[h264 @ 0x9f22d20] Missing reference picture
Last message repeated 13 times
[h264 @ 0x9f1cac0] max_analyze_duration 5000000 reached at 5000000
[h264 @ 0x9f1cac0] Estimating duration from bitrate, this may be
inaccurate
Seems stream 0 codec frame rate differs from container frame rate: 60.00
(60/1) -> 30.00 (60/2)
Input #0, h264, from 'error_51.264':
Duration: N/A, bitrate: N/A
Stream #0:0, 152, 1/1200000: Video: h264 (High), yuv420p, 352x288,
1/60, 30 fps, 30 tbr, 1200k tbn, 60 tbc
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/568>
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