On Wed, 16 Jan 2008, Christian Ebert wrote:
> I get buffer underflows for longer stuff when encoding from dv to
> mpeg2 for dvd with ffmpeg, and i really played around a lot with
That's the rate control issue(s) I had in mind.
> the ever changing options...
Yep - hard to keep up sometimes.
> But I'd like to decode with lav2yuv, but it segfaults here on dv movs
Works fine here - BUT I have seen the problem you mentioned earlier
(symptom is that 'twos' audio isn't recognized as valid).
> I've built the latest cvs libquicktime to no avail. No
> errors when compiling, small stuff like qtinfo works.
You're using the latest (and thanks for that info) from CVS. That's
good.
> What configure options do give to libquicktime? I'm asking as
> you're on a Mac as well, even though I still have 10.4.
./configure --enable-gpl
(need that to include ffmpeg's libavcodec as I recall)
You may have a corrupt or outdated .libquicktime_codecs in your
home directory. Try removing it and then running any program
linked to libquicktime. If .libquicktime_codecs IS recreated then
things are setup/installed correctly and you shouldn't have any
problems.
If .libquicktime_codecs is NOT recreated or is empty then libquicktime
can't find the *.so files (loadable modules/plugins) for the codecs.
ls /usr/local/lib/libquicktime
lqt_audiocodec.la lqt_ffmpeg.so lqt_rtjpeg.la
lqt_audiocodec.so lqt_lame.la lqt_rtjpeg.so
lqt_dv.la lqt_lame.so lqt_videocodec.la
lqt_dv.so lqt_mjpeg.la lqt_videocodec.so
lqt_faac.la lqt_mjpeg.so lqt_vorbis.la
lqt_faac.so lqt_opendivx.la lqt_vorbis.so
lqt_faad2.la lqt_opendivx.so lqt_x264.la
lqt_faad2.so lqt_png.la lqt_x264.so
lqt_ffmpeg.la lqt_png.so
You should NOT see ".dylib" files and you MUST have .so files. At
one time there was a bug and either extensionless (no .so) or wrong
extension (.dylib) files were installed. Since the code was looking
for .so only it didn't find anything.
If you still have problems the libquicktime-devel list is probably
a better place to carry on the conversation.
Oh, 10.5 is fine if you're on a PPC based Mac. If you're on an
Intel based Mac and want to run 10.5 then either 1) delete or 2) do
one last build/install of xvid, ffmpeg, theora, and a couple others
I can't recall at the moment - they don't compile/link.
> There's an Apple compressor for mpeg2?
And 3gpp, H.264, AC3, MPEG-1, AAC, MPEG-4 and a bunch of others I'd
have to lookup. "Compressor" (I'm only at Compressor2, not having
upgraded to 3) is Apple's compression engine frontend. It's not
sold separately but only as part of the Final Cut Studio bundle
(a bit pricey but a fair value for the amount of software and
documentation you get).
Cheers,
Steven Schultz
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