[Ffmpeg-devel-irc] ffmpeg.log.20131104

[burek]

[18:40] <tlhiv_work> how can i encode an MP4 and have it "stetch/compress" to ensure that it's output duration is prescribed
[19:37] <klemax> hi
[19:37] <klemax> php: symbol lookup error: /usr/local/lib/php/extensions/no-debug-non-zts-20100525/ffmpeg.so: undefined symbol: avcodec_init
[19:37] <klemax> is there a way to fix this error?
[19:38] <durandal_1707> yes, updata api
[19:38] <klemax> what api?
[19:40] <tlhiv_work> i have having the worst luck getting an overlayed video A/V sync to work out --> http://www.tlhiv.org/tmp/ffmpeg/
[19:40] <tlhiv_work> bar.mp4 has perfect A/V sync
[19:40] <tlhiv_work> but the output.mp4 has bad A/V sync problems
[19:42] <tlhiv_work> llogan: http://pastebin.tlhiv.org/JNGJlRYt
[19:43] <llogan> you should have included the command
[19:45] <tlhiv_work> llogan: http://pastebin.tlhiv.org/tnTEyPqI
[19:45] <durandal_1707> klemax: one that use lavc
[19:45] <tlhiv_work> the source files and resulting output are located at --> http://www.tlhiv.org/tmp/ffmpeg/
[19:46] <durandal_1707> klemax: also ffmpeg.so is not from ffmpeg project
[19:50] <klemax> durandal_1707: Okay, thanks
[19:54] <llogan> tlhiv_work: try a newer ffmpeg http://ffmpeg.org/download.html#LinuxBuilds
[19:54] <tlhiv_work> i just built this one last week
[19:54] <llogan> tlhiv_work: and see if this makes a difference ffmpeg -i foo.mp4 -i bar.mp4 -i circle.png -filter_complex "[0:v]setpts=PTS-STARTPTS[0v];[1:v]setpts=PTS-STARTPTS[1v];[1v][2:v]overlay[i];[0v][i]overlay=1022:96" out.mp4
[19:55] <llogan> the 0.10 branch is considered old
[19:58] <tlhiv_work> wow ... i have the newer version but i was still using my older one ... bah
[21:23] <viric> how can I do vp8 vbr? with qmax/qmin?
[21:24] <viric> or q simply?
[22:06] <llogan> viric: try http://trac.ffmpeg.org/wiki/vpxEncodingGuide
[22:13] <Ove_bv> Hello. I have a question about seeking in ffmpeg.
[22:13] <Ove_bv> I would like to seek to frame number X in a file
[22:13] <Ove_bv> Am I doing this right?
[22:13] <Ove_bv> avformat_seek_file(pFormatCtx, videoStreamIdx, 0, X, X, AVSEEK_FLAG_FRAME);
[22:23] <viric> llogan: aha. I found also in webmproject the encoding guide. Thank you
[23:01] <AndrzejL> guys can I specify how many cores can ffmpeg occupy?
[23:01] <viric> some codecs understand '-threads'
[23:01] <AndrzejL> I mean lets say I am converting a video - can I specify for the ffmpeg command to use 4 out of 8 cores?
[23:02] <AndrzejL> ok
[23:03] <AndrzejL> thanks viric
[23:03] <AndrzejL> goodnight all
[23:38] <makar> is it possible to remove / delete PID tables from a ts using ffmpeg?
[23:38] <makar> or to create a ts without tables?
[00:00] --- Tue Nov  5 2013