On Tue, Jul 7, 2009 at 7:26 AM, Valentina Messeri<[email protected]> wrote: > Quoting "Aaron Newcomb" <[email protected]>: > >> This is pretty close to my workflow so I think you are on the right >> track. x264 is definitely better than mp4 if you are looking for good >> quality to file size ratio. > > well....x264 is a video codec where .mp4 is better a format for audio/video > file. > Maybe when you say "mp4" you meant "mpeg4", which is definitly a video codec > you can compare with x264. > Exactly. Thanks for clarifying as this is confusing for some people when they start out.
> While, for example: > mpeg2 (standard format for dvd) or special mpeg you were trying to use to > render from cinelerra are are slightly different, beeing lossless codec > HIres; > > Where h264/.mp4 are better used as lossy low res(1280x720) option to upload > video on hd mediabase (as vimeo is) > > > :D > > vale > > I am playing around with my x264 ffmpeg >> >> command. Here is what it is currently, but I think I can do better. >> >> ffmpeg -i inputfile -an -pass 1 -aspect 16:9 -vcodec h264 -b 512k -r >> 29.97 -flags +loop -cmp +chroma -partitions 0 -me_method epzs -subq 1 >> -trellis 0 -refs 1 -coder 0 -me_range 16 -g 250 -keyint_min 25 >> -sc_threshold 40 -i_qfactor 0.71 -bt 512k -maxrate 768k -bufsize 2M >> -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 >> -level 13 outputfile.mp4 && ffmpeg -i inputfile -acodec aac -ab 128k >> -pass 2 -aspect 16:9 -vcodec h264 -b 512k -r 29.97 -flags +loop -cmp >> +chroma -partitions +parti4x4+partp4x4+partp8x8+partb8x8 -flags2 >> +mixed_refs -me_method umh -subq 7 -trellis 2 -refs 5 -coder 0 >> -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 >> -bt 512k -maxrate 768k -bufsize 2M -rc_eq 'blurCplx^(1-qComp)' -qcomp >> 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 13 -y outputfile.mp4 >> >> On Sun, May 17, 2009 at 12:14 AM, Daniel Jircik<[email protected]> wrote: >>> >>> Hi >>> Looking for critique and suggestions for hdv to web hd workflow. I like >>> vimeo... results: >>> http://vimeo.com/4684883 >>> >>> dvgrab -a -f hdv >>> >>> Load clips and render to 720p Quicktime for Linux using translate, >>> deinterlace and sharpen >>> >>> yuva 4:2:2 planar file is apr. 5 GB per min >>> uncompressed rgb is apr 10 GB per min. >>> >>> Edit and render Quicktime for Linux. >>> >>> As per this very informative thread: >>> http://flowplayer.org/forum/7/12671 >>> I got pretty good h264 results. >>> >>> mp4 from yuva 4:2:2 is apr 15 MB per min >>> mp4 from uncompressed rgb is 30 MB per min >>> >>> the ffmpeg comandline is: >>> >>> $ ffmpeg -y -i 720-yuv-test2.mov -acodec libfaac -ar 44100 -ab 96k >>> -vcodec >>> libx264 -level 41 -crf 20 -bufsize 20000k -maxrate 25000k -g 250 -r 20 -s >>> 1280x720 -coder 1 -flags +loop -cmp +chroma -partitions >>> +parti4x4+partp8x8+partb8x8 -flags2 +brdo+dct8x8+bpyramid -me umh -subq 7 >>> -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -rc_eq >>> 'blurCplx^(1-qComp)' -bf 16 -b_strategy 1 -bidir_refine 1 -refs 6 >>> -deblockalpha 0 -deblockbeta 0 vimeohd2.mp4 >>> >>> It ended up being a bit choppier than I had hoped and there is a small >>> audio >>> delay. >>> >>> Where I was not sucsessful was trying to render mpeg2 with cinelerra as >>> per >>> crazed >>> >>> mulehttp://crazedmuleproductions.blogspot.com/2007/06/beginners-guide-to-exporting-video-from.htmls >>> Audio rendered but video crashed with errors. >>> Is mpeg any better than x264 ? >>> >>> Suggestions? >>> >>> Kind Regards >>> Daniel Jircik >>> http://reggaecobras.com >>> >>> >>> >> >> >> >> -- >> Thanks, >> Aaron Newcomb >> http://www.thesourceshow.org >> >> _______________________________________________ >> Cinelerra mailing list >> [email protected] >> https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra >> > > > > ---------------------------------------------------------------- > This message was sent using IMP, the Internet Messaging Program. > > > _______________________________________________ > Cinelerra mailing list > [email protected] > https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra > -- Thanks, Aaron Newcomb http://www.thesourceshow.org _______________________________________________ Cinelerra mailing list [email protected] https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
