New submission from Lou <[email protected]>: ffmpeg hangs with high CPU usage when using '-ss foo' (with either seconds or hh:mm:ss.ms format) and '-vcodec copy' with the videolan Git repository. Input or output format doesn't seem to matter. Tested on Arch Linux x86_64 and Ubuntu Karmic 32-bit. I can't duplicate this if I use the git.ffmpeg.org repository.
http://mirror05.x264.nl/Dark/x264clips/IronMan.mkv $ ffmpeg -v 9 -loglevel 99 -i IronMan.mkv -ss 20 -vcodec copy -an -y output.mkv FFmpeg version git-N-27717-g7782cb2, Copyright (c) 2000-2011 the FFmpeg developers built on Feb 18 2011 18:05:19 with gcc 4.5.2 20110127 (prerelease) configuration: --prefix=/usr --enable-gpl libavutil 50. 39. 0 / 50. 39. 0 libavcodec 52.113. 1 / 52.113. 1 libavformat 52.101. 0 / 52.101. 0 libavdevice 52. 2. 3 / 52. 2. 3 libavfilter 1. 76. 0 / 1. 76. 0 libswscale 0. 12. 0 / 0. 12. 0 [NULL @ 0x2a27650] Probed with size=2048 and score=100 st:0 removing common factor 1000000 from timebase st:1 removing common factor 1000000 from timebase [h264 @ 0x2a2b440] no picture Last message repeated 1 times [matroska,webm @ 0x2a27650] All info found [matroska,webm @ 0x2a27650] Estimating duration from bitrate, this may be inaccurate Seems stream 0 codec frame rate differs from container frame rate: 47.95 (10000000/208541) -> 24.00 (24/1) Input #0, matroska,webm, from 'IronMan.mkv': Duration: 00:01:48.50, start: 0.000000, bitrate: N/A Stream #0.0, 23, 1/1000: Video: h264 (High), yuv420p, 1280x720, 208541/10000000, PAR 115:87 DAR 1840:783, 23.98 fps, 24 tbr, 1k tbn, 47.95 tbc (default) Stream #0.1, 48, 1/1000: Audio: aac, 48000 Hz, stereo, s16 (default) Output #0, matroska, to 'output.mkv': Metadata: encoder : Lavf52.101.0 Stream #0.0, 0, 1/1000: Video: H264 / 0x34363248, yuv420p, 1280x720 [PAR 115:87 DAR 1840:783], 208541/5000000, q=2-31, 1k tbn, 23.98 tbc (default) Stream mapping: Stream #0.0 -> #0.0 Press [q] to stop encoding ---------- messages: 13727 nosy: FakeOutdoorsman priority: normal status: new substatus: new title: FFmpeg hangs with -ss and -vcodec copy type: bug ________________________________________________ FFmpeg issue tracker <[email protected]> <https://roundup.ffmpeg.org/issue2619> ________________________________________________
