Andrew Wason <[EMAIL PROTECTED]> added the comment:
The problem this causes is when encoding 15fps30000fps.mp4
with mencoder, the resulting file is only 66ms long (instead of 9s) and plays
back only a single frame. mencoder log attached.
Hmm, 29fps1000fps.mp4 used to have the same issue (resulting file was 6s long,
super fast framerate) but it seems to encode ok with current mencoder.
15fps30000fps.mp4 still has the above problem encoding though.
Also, you can see ffmpeg is mis-detecting the framerate in gdb:
(gdb) run -i /Volumes/Passport/bugs/framerate/29fps1000fps.mp4
Starting program: /Users/aw/Projects/software/encoding/ffmpeg-svn/ffmpeg_g -i
/Volumes/Passport/bugs/framerate/29fps1000fps.mp4
FFmpeg version SVN-r15216, Copyright (c) 2000-2008 Fabrice Bellard, et al.
configuration:
--prefix=/Users/aw/Projects/motionbox/encoder/foundation/installed
--extra-cflags=-I/Users/aw/Projects/motionbox/encoder/foundation/installed/include
--extra-ldflags=-L/Users/aw/Projects/motionbox/encoder/foundation/installed/lib
--cpu=pentium-m --disable-ffserver --disable-network --disable-shared
--disable-vhook --disable-liba52 --enable-avfilter --enable-gpl
--enable-hardcoded-tables --enable-libamr-nb --enable-libamr-wb
--enable-libdirac --enable-libfaac --enable-libfaad --enable-libgsm
--enable-libmp3lame --enable-libschroedinger --enable-libtheora
--enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree
--enable-postproc --enable-pthreads --enable-static --enable-swscale
--enable-debug=gdb3 --disable-optimizations
libavutil 49.10. 0 / 49.10. 0
libavcodec 51.71. 0 / 51.71. 0
libavformat 52.22. 0 / 52.22. 0
libavdevice 52. 1. 0 / 52. 1. 0
libavfilter 0. 1. 0 / 0. 1. 0
libswscale 0. 6. 1 / 0. 6. 1
libpostproc 51. 2. 0 / 51. 2. 0
built on Sep 5 2008 09:59:12, gcc: 4.0.1 (Apple Inc. build 5484)
Breakpoint 2, av_find_stream_info (ic=0x1803a00) at libavformat/utils.c:2193
2193 st->r_frame_rate.num = st->codec->time_base.den;
(gdb) n
2194 st->r_frame_rate.den = st->codec->time_base.num;
(gdb) n
2166 for(i=0;i<ic->nb_streams;i++) {
(gdb) p st->r_frame_rate
$1 = {
num = 1000,
den = 1
}
(gdb) bt
#0 av_find_stream_info (ic=0x1803a00) at libavformat/utils.c:2166
#1 0x0000bed6 in opt_input_file (filename=0xbffff8d8
"/Volumes/Passport/bugs/framerate/29fps1000fps.mp4") at ffmpeg.c:2847
#2 0x0000f468 in parse_options (argc=3, argv=0xbffff7e0, options=0x619780,
parse_arg_function=0xd400 <opt_output_file>) at cmdutils.c:152
#3 0x0000ecee in main (argc=3, argv=0xbffff7e0) at ffmpeg.c:3922
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FFmpeg issue tracker <[EMAIL PROTECTED]>
<https://roundup.mplayerhq.hu/roundup/ffmpeg/issue622>
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