Olm-e said : > Aymeric Mansoux wrote: > > Olm-e said : > > > >> Aymeric Mansoux wrote: > >> > >>> Olm-e said : > >>> > >>> > >>>> ok, thanks for the rather clear answer ... > >>>> > >>>> from experience, I only have tested and witnessed (huge) difference in > >>>> video compression time (i.e. with ffmpeg2theora) on 64bit compared to > >>>> 32bit installations ... on sound parts, I must admit I have not realy > >>>> made tests to compare... > >>>> > >>>> > >>> Ok, could you make some benchmarks if you have time? > >>> like... for example how ffmpeg2theora, ffmpeg, oggenc, compare on the > >>> same 64bits machine with: > >>> - amd64 kernel on a 386 Debian OS > >>> - amd64 kernel on a amd64 Debian OS > >>> > >>> > >>> > >>> > >> test done : > >> on a AMD Phenom 9950 with 4 gig ram, systems installed on USB drive (8 > >> gig with 2 root partitions in ext3 for test systems) > >> > >> for a 4min57sec mpeg2 PAL DVD file (720x...@9000kb/s) transcoding to > >> ogg/theora with ffmpeg2theora default (ffmpeg2theora bla.dvd -o bla.ogv ) > >> > >> on a lenny 5.01 amd64 with kernel 2.6.26-2-amd64 it took > >> 10min59sec > >> > >> on a lenny 5.01 i386 with same kernel it took > >> 13min34sec > >> > >> on the same lenny with kernel 2.6.26-2-686 it took > >> 14min58 > >> > > > > Thanks, that's really useful info! > > > > what about the amd64 kernel from the lenny i386 distribution? > > > > Also to make the test more complet it would be helpful to know which gcc > > flags have been used for the ffmpeg2theora binaries. > > > > a. > > > > > ha I probably miswrote it : I used the amd64 kernel from the i386 > distro, just it has the same "name" ... (so I supposed it was same > kernel ... )
ah ok! :) > for the ffmpeg2theora gcc flags, how do I see it ? I just apt-get > installed it ... for each distros, apt-get source ffmpeg2theora then check in debian/rules if there are some specificgcc flags used, and if not, check in the main Makefile (or whatever ffmpeg2theora uses) how the compiler is called. a. > Ol. > >> I'll test with oggenc and ffmpeg tomorow > >> > >> cheers, > >> > >> Ol. > >> > >> > >> --- > >> [email protected] > >> irc.goto10.org #pure:dyne > >> > >> > > > > --- > > [email protected] > > irc.goto10.org #pure:dyne > > > > > > > --- > [email protected] > irc.goto10.org #pure:dyne > --- [email protected] irc.goto10.org #pure:dyne
