#187: 3GP/MP4 performance regression --------------------------+-------------------------- Reporter: jsd | Type: defect Status: new | Priority: normal Component: undetermined | Version: unspecified Keywords: | Blocked By: Blocking: | Reproduced: 0 Analyzed: 0 | --------------------------+-------------------------- Download source file from here: http://tm-west.s3.amazonaws.com/2423.mp4 (74MB) I have a fairly old build of ffmpeg - FFmpeg version SVN-r24841, Copyright (c) 2000-2010 the FFmpeg developers built on Aug 19 2010 16:20:28 with gcc 4.1.2 20080704 (Red Hat 4.1.2-48) With the following command line, it processes this particular MP4 file acceptably fast (about 90 seconds) /usr/local/bin/ffmpeg -i 2423.mp4 -s 480x352 -vcodec libx264 -acodec libfaac -vpre fast -b 300k -bt 300k -threads 0 2423.mp4.mp4 The last line from ffmpeg is: frame= 5235 fps= 64 q=-1.0 Lsize= 7171kB time=175.40 bitrate= 334.9kbits/s I built ffmpeg from the latest tarball today and something has happened so that it runs incredibly slowly and eventually gives up. /usr/local/bin/ffmpeg -loglevel quiet -v 0 -i /tmp/videoproc-11865/2423.mp4 -s 480x352 -an -pass 1 -vcodec libx264 -vpre fast_firstpass -b 300k -bt 300k -threads 0 /tmp/videoproc-11865/2423.mp4.mp4 ffmpeg version UNKNOWN, Copyright (c) 2000-2011 the FFmpeg developers built on May 5 2011 11:01:27 with gcc 4.1.2 20080704 (Red Hat 4.1.2-48) configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libx264 --enable-pthreads --enable-static --disable-shared --disable-network --enable-nonfree libavutil 51. 2. 0 / 51. 2. 0 libavcodec 53. 3. 0 / 53. 3. 0 libavformat 53. 0. 3 / 53. 0. 3 libavdevice 53. 0. 0 / 53. 0. 0 libavfilter 2. 4. 0 / 2. 4. 0 libswscale 0. 14. 0 / 0. 14. 0 Seems stream 1 codec frame rate differs from container frame rate: 60000.00 (60000/1) -> 30000.00 (60000/2) Stream mapping: Stream #0.1 -> #0.0 Press [q] to stop encoding sh: line 1: 11883 File size limit exceeded It took 2 hrs and 11 minutes for that command to run and fail. -- Ticket URL: <http://ffmpeg.org/trac/ffmpeg/ticket/187> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker