(In reply to comment #64)
> AC3 import OK. AC3 export gives a zero byte file but the same happens with
> standalone ffmpeg at the command line "LIBAVUTIL_50 not defined in file
> libavutil.so.50 with link time reference". I gather I may have to find
> libavcore, from Googling the error?
>
Not sure why you got that error, but I too get an empty AC3 export. I checked
the Audacity log and found:
01:07:58: Debug: Log: [ac3 @ 0x1d26d400] Specified sample_fmt is not supported.
01:07:58: Error: FFmpeg : ERROR - Can't open audio codec 0x15003.
Apparently, on Jan 4th, 2011, the default AC3 encoder now ONLY accepts FLOAT
samples. It's the only encoder (near as I can tell) that is like this. The
only other encoder that accepts FLOAT is the PCM fella, but he accepts all of
the formats so he's not a problem.
The older encoder has been renamed to ac3_fixed. Not sure of the best
approach:
1) Make the Audacity exporter capable of supplying one of the sample formats
supported by the encoder
2) Just force usage of the ac3_fixed encoder since he's the only one like
this.
> M4A import OK. Can't test M4A export as disabling the native aac encoder
> didn't
> give me libfaac so I will try again later with --enable-libfaac.
Here's the parameters I'm using for the Windows and Mac builds:
sh ./configure --arch=i386 \
--cc=gcc-4.0 \
--disable-ffplay \
--disable-ffprobe \
--disable-ffserver \
--disable-avdevice \
--disable-debug \
--disable-encoder=aac \
--disable-decoder=amrnb \
--disable-decoder=amrwb \
--disable-static \
--disable-doc \
--enable-gpl \
--enable-nonfree \
--enable-version3 \
--enable-libopencore-amrnb \
--enable-libopencore-amrwb \
--enable-pthreads \
--enable-libfaac \
--enable-libspeex \
--enable-libgsm \
--enable-libmp3lame \
--enable-memalign-hack \
--enable-shared
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https://bugs.launchpad.net/bugs/602934
Title:
ffmpeg import/export not working with ffmpeg version in maverick
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