[FFmpeg-user] ac3 invalid bit rate error

tundra5280 tundra5280 at gmail.com
Mon Aug 22 17:09:43 CEST 2011

Have been converting dts audio to ac3 successfully with ffmpeg for almost a year.  Built a new ffmpeg executable today (ffmpeg version N-32060-g124deea) on Mac Pro running 10.7.1 and now get the following error when attempting to convert:

[ac3 @ 0x7fbe9b02f400] invalid bit rate

Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height

I am also seeing:
[mpegts @ 0x7fbe9b008800] Continuity Check Failed

The conversion process does not seem to be hanging up on the continuity check but is hanging up on the ac3 error but maybe they are related.

./configure --prefix=${TARGET} --cc=clang --enable-nonfree --enable-gpl --enable-version3 --enable-libx264 --enable-pthreads --enable-libfaac --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-libgsm --enable-libopenjpeg --enable-libxvid --enable-libschroedinger --enable-libdirac --enable-libxavs --enable-librtmp --enable-libfreetype --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-swscale --enable-avfilter --enable-filters --enable-postproc --target-os=darwin --arch=x86_64 --enable-runtime-cpudetect

My conversion command line has not changed.  The audio portion of command line:
-acodec ac3 -ab 448k -ar 48000

448k is a valid bit rate!!!

Get the same error wether the audio source is dts or ac3.

Any work arounds for this error?  Thanks in advance for help.

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