Olm-e wrote: > 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 ... ) > > for the ffmpeg2theora gcc flags, how do I see it ? I just apt-get > installed it ... > > Ol. > >>> I'll test with oggenc and ffmpeg tomorow >>> >>> cheers, >>> >>> Ol. >>> >>>
Ok test done with ffmpeg (for oggenc I need another file...) same file than above, with ffmpeg from repository (version r11872+debian0.svn20080206-17 build on feb 10 2009 gcc 4.3.3 ) $ ffmpeg -i blah.dvd -vcodec libtheora -acodec libvorbis blah.ogg output at 200 kb/s video 64kb/s sound with lenny 5.01 amd64 kernel 2.6.26-2-amd64 encoding at 36fps for 7433 frames at PAL res lenny 5.01 i386 kernel 2.6.26-2-amd64 encoding at 31fps lenny 5.01 i386 kernel 2.6.26-2-686 encoding at 30fps Ol. --- [email protected] irc.goto10.org #pure:dyne
