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Analog of flags2=+mixed_refs in last ffmpeg

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Alexander Semigrodskikh
Analog of flags2=+mixed_refs in last ffmpeg
on Jul 9, 2012 at 1:32:50 pm

Hello All!

We use ffmpeg version 0.6.5 but have problems with sync of video and audio in iOS. We wanted to use a newer version of ffmpeg installed by ffmpeginstaller (FFMPEG Auto Installer) but the new version does not understand our old preset
flags2=+mixed_refs

How can we express this
flags2=+mixed_refs
in our new version? Our new version is shown below:

# ffmpeg -version
ffmpeg version N-42365-g36b2bd9-syslint
built on Jul 9 2012 06:04:26 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslint
libavutil 51. 64.100 / 51. 64.100
libavcodec 54. 33.100 / 54. 33.100
libavformat 54. 15.102 / 54. 15.102
libavdevice 54. 1.100 / 54. 1.100
libavfilter 3. 1.100 / 3. 1.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100

Thank you if you answer.


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Reuben Martin
Re: Analog of flags2=+mixed_refs in last ffmpeg
on Jul 9, 2012 at 7:37:38 pm

ffmpeg no longer tries to map options to those available with libx64, which is confusing when the names are different and different options are available between versions.

Use the "-x264opts" followed by key=value pairs, using ":" as a delimiter.

Example (from the man page): ffmpeg -i foo.mpg -vcodec libx264 -x264opts keyint=123:min-keyint=20 -an out.mkv

For a list of all x264 options: x264 --fullhelp


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