Linked by Eugenia Loli on Wed 5th Oct 2005 07:44 UTC, submitted by Dan
FreeBSD BSDForums interviews FreeBSD Release Engineering Team's Scott Long relating to various aspects of FreeBSD. Topics discussed include FreeBSD general issues, its academic roots, how FreeBSD compares to other BSDs - OpenBSD, NetBSD, and the ongoing debate on FreeBSD vs. Linux. Scott gives us his perspective on the corporate adoption and popularity of FreeBSD. He brings us up to speed on FreeBSD 6.0, its new features and enhancements, including Apple G4 PowerMac, AMD64 and wireless compatibility. Scott also discusses FreeBSD 6.0's upgrade path and release timetable.
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RE: mencoder ffmpeg
by molnarcs on Wed 5th Oct 2005 14:21 UTC in reply to "mencoder ffmpeg"
molnarcs
Member since:
2005-09-10

Wrong question ... mencoder and ffmpeg (why do you need ffmpeg separately btw? ffmpeg is part of mplayer/mencoder, and it is always up to date) coredumping might have a variety of reasons: bad packaging of your particular distro, buggy (or bad packaging) of supporting libraries, etc... In other words, it is very unlikely that mencoder is buggy on linux in general and works on FreeBSD (in general). It would be rather silly to switch to FreeBSD if mencoder is buggy on your particular linux distribution.

On the other hand, yeah, I use it fairly regurarly on FreeBSD, encoding into a variety of formats: mpeg-4 - either ffmpeg or xvid -, h.264 (with x264) and occasionally mpeg2 - and it works fine, with my encoder settings. Which reminds me: there are so many options to mencoder, that it is easy to find one that won't work, in fact if I remember correctly, there are certain settings that would trigger a coredump mentioned in the man page as well. Also, vob is just a container of mpeg2 streams, so you might have problem with mpeg2 decoding.

One good thing right now about FreeBSD and encoding is that they always have the latest x264 in ports (just checked, I currently have x264-0.0.20051004 installed). Which is a good thing for such a new and fast improving codec ;) - but if you can run ./configure && make && make install on linux, then this is not a good reason to switch either.

Reply Parent Score: 2

RE[2]: mencoder ffmpeg
by bonjour on Wed 5th Oct 2005 17:47 in reply to "RE: mencoder ffmpeg"
bonjour Member since:
2005-07-12

and that's exactly why i think freebsd would be a better choice for me because the entire platform is very well coordinated and tested. that's not to say that linux doesn't have very well coordinated and tested distributions, but i use slackware 10.1 with a 2.6 kernel and probably the latest gcc and libc, libc++ etc libraries. mencoder's ffmpeg option always fails. so i tried to use just ffmpeg libraries and that core dumped as well.

on my mac machine, ffmpegx, which wraps ffmpeg and mencoder, seems to work just fine on these same vob files.

you're probably right, i do have a mismatch in libraries probably.

what kind of encoding times are you getting when going to say mpeg4 using mencoder on say a 2 hour movie and 2 two encoding?

Reply Parent Score: 1

RE[3]: mencoder ffmpeg
by molnarcs on Wed 5th Oct 2005 22:28 in reply to "RE[2]: mencoder ffmpeg"
molnarcs Member since:
2005-09-10

"what kind of encoding times are you getting when going to say mpeg4 using mencoder on say a 2 hour movie and 2 two encoding?"

oh, there are so many options that can slow down encoding... you can't calculate time based solely on the codec used and the lenght of the movie. I don't have any idea how fast it would go without any options. But: apply a light denoise filter (hqdn3d=2:1:2) and encoding speed decreses by ~10%. use v4mv (4 motion vectors) which decreases speed by another 10. trellis quantization, mbd=2, etc - all will decrease speed. Now on my sempron 3100+, with almost ALL the cpu intensive options turned on, doing bicubic sofware scaling and all, I get 8-10 frames/sec. If I turn those options off, I'd probably get 25-30 or even more. I know this because I can rip tv programmes directly into mpeg-4 (which needs at least 25 fps - real time encoding) using mencoder, with some options (v4mv, deblocking filters) turned on. Check out this script: ftp://hatvani.unideb.hu/pub/FreeBSD/ADDONS/docs/TV_ENCODE/rip.sh

If you have further questions email me at molnarcsATgmail.com - I don't want to drive this further off topic... (I might claim that the above script is a good template for encoding from TV on FreeBSD though ;) ))

Reply Parent Score: 2