#327: artifacts when seeking in mpeg4 avi (regression) ----------------------+------------------------- Reporter: exobuzz | Type: defect Status: new | Priority: normal Component: avformat | Version: git-master Keywords: | Blocked By: Blocking: | Reproduced: 0 Analyzed: 0 | ----------------------+------------------------- Since the patch:
commit 187528441ab936c102b8e72f38925cc10fc14abc Author: Michael Niedermayer <[email protected]> Date: Fri May 6 03:52:16 2011 +0200 avidec: correct frame_offset for seeking I have artifacts when seeking on an avi file. the file is mpeg4 avi encoded with mencoder and is 5713978482 bytes in length. if i chop (with dd) the first 20 or 200mb of the file, the piece seeks correctly. (testing with ffplay) playing (and seeking) the full file with the problem {{{ $ ./ffplay artifacts_when_seeking.avi ffplay version N-30884-g54dd50d, Copyright (c) 2003-2011 the FFmpeg developers built on Jun 20 2011 23:10:06 with gcc 4.5.2 configuration: libavutil 51. 9. 1 / 51. 9. 1 libavcodec 53. 7. 0 / 53. 7. 0 libavformat 53. 4. 0 / 53. 4. 0 libavdevice 53. 1. 1 / 53. 1. 1 libavfilter 2. 23. 0 / 2. 23. 0 libswscale 0. 14. 1 / 0. 14. 1 [avi @ 0x13b01c0] non-interleaved AVI Input #0, avi, from 'artifacts_when_seeking.avi': Metadata: encoder : MEncoder 1.0rc4-4.5.2 Duration: 02:13:54.16, start: 0.000000, bitrate: 5689 kb/s Stream #0.0: Video: mpeg4, yuv420p, 1280x544 [PAR 1:1 DAR 40:17], 24 tbr, 24 tbn, 24 tbc Stream #0.1: Audio: dca (DTS), 48000 Hz, 5.1, s16, 1536 kb/s [dca @ 0x13af5e0] Not a valid DCA frame= 43KB sq= 0B f=0/0 f=0/0 [mpeg4 @ 0x13675c0] warning: first frame is no keyframe0B f=0/0 [dca @ 0x13af5e0] Not a valid DCA frame= 27KB sq= 0B f=0/0 [mpeg4 @ 0x13675c0] warning: first frame is no keyframe [dca @ 0x13af5e0] Not a valid DCA frame= 285KB sq= 0B f=0/0 [mpeg4 @ 0x13675c0] warning: first frame is no keyframe0B f=0/0 [dca @ 0x13af5e0] Not a valid DCA frame= 575KB sq= 0B f=0/0 [mpeg4 @ 0x13675c0] warning: first frame is no keyframe0B f=0/0 [dca @ 0x13af5e0] Not a valid DCA frame= 682KB sq= 0B f=0/0 [mpeg4 @ 0x13675c0] warning: first frame is no keyframe0B f=0/0 [dca @ 0x13af5e0] Not a valid DCA frame= 627KB sq= 0B f=0/0 [mpeg4 @ 0x13675c0] warning: first frame is no keyframe0B f=0/0 [dca @ 0x13af5e0] Not a valid DCA frame= 674KB sq= 0B f=0/0 [mpeg4 @ 0x13675c0] warning: first frame is no keyframe0B f=0/0 [dca @ 0x13af5e0] Not a valid DCA frame= 378KB sq= 0B f=0/0 [mpeg4 @ 0x13675c0] warning: first frame is no keyframe0B f=0/0 [dca @ 0x13af5e0] Not a valid DCA frame= 423KB sq= 0B f=0/0 [mpeg4 @ 0x13675c0] warning: first frame is no keyframe0B f=0/0 188.34 A-V: 0.008 s:0.0 aq= 321KB vq= 392KB sq= 0B f=0/0 }}} revert two commits - the one mentioned and a update from ticket #271 {{{ $ git revert -n a7e4342fc1a0e962b829a9a194d034fa38590951 $ git revert -n 187528441ab936c102b8e72f38925cc10fc14abc }}} i am then able to seek ok without the artifacts {{{ $ ./ffplay artifacts_when_seeking.avi ffplay version N-30884-g54dd50d, Copyright (c) 2003-2011 the FFmpeg developers built on Jun 20 2011 23:10:06 with gcc 4.5.2 configuration: libavutil 51. 9. 1 / 51. 9. 1 libavcodec 53. 7. 0 / 53. 7. 0 libavformat 53. 4. 0 / 53. 4. 0 libavdevice 53. 1. 1 / 53. 1. 1 libavfilter 2. 23. 0 / 2. 23. 0 libswscale 0. 14. 1 / 0. 14. 1 [avi @ 0x2d850c0] non-interleaved AVI Input #0, avi, from 'artifacts_when_seeking.avi': Metadata: encoder : MEncoder 1.0rc4-4.5.2 Duration: 02:13:54.16, start: 0.000000, bitrate: 5689 kb/s Stream #0.0: Video: mpeg4, yuv420p, 1280x544 [PAR 1:1 DAR 40:17], 24 tbr, 24 tbn, 24 tbc Stream #0.1: Audio: dca (DTS), 48000 Hz, 5.1, s16, 1536 kb/s [dca @ 0x2d844c0] Not a valid DCA frame= 19KB sq= 0B f=0/0 f=0/0 364.79 A-V: -0.002 s:0.0 aq= 319KB vq= 840KB sq= 0B f=0/0 Last message repeated 8 times }}} here is a snippet from the beginning of the file (20mb). if you need anything else please let me know. http://www.datafilehost.com/download-a1793e98.html -- Ticket URL: <http://www.ffmpeg.org/trac/ffmpeg/ticket/327> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker _______________________________________________ FFmpeg-trac mailing list [email protected] http://avcodec.org/mailman/listinfo/ffmpeg-trac
