Jason Self
2009-Jun-20 05:56 UTC
[theora] DVD NTSC video plays twice as fast when encoded with libtheora
https://roundup.ffmpeg.org/roundup/ffmpeg/issue1197 I had originally encountered this problem using ffmpeg2theora. I switched to ffmpeg proper in an attempt to identify where the problem was at, and found that the problem persisted. As a result I had thought this was a problem with ffmpeg, but the ffmpeg folks seem to indicate that this is specific to Theora (too much finger pointing I think.) I can confirm that switching codecs does solve the problem, though. Anyone care to weigh in? A small section (10MB) of the problematic video can be obtained from http://shows.bluehome.net/kfp_small.vob.
Jason Self
2009-Jun-20 05:59 UTC
[theora] DVD NTSC video plays twice as fast when encoded with libtheora
On Fri, Jun 19, 2009 at 10:56 PM, Jason Self <jason.self at gmail.com> wrote:> > https://roundup.ffmpeg.org/roundup/ffmpeg/issue1197 > > I had originally encountered this problem using ffmpeg2theora. I > switched to ffmpeg proper in an attempt to identify where the problem > was at, and found that the problem persisted. As a result I had > thought this was a problem with ffmpeg, but the ffmpeg folks seem to > indicate that this is specific to Theora (too much finger pointing I > think.) I can confirm that switching codecs does solve the problem, > though. Anyone care to weigh in? A small section (10MB) of the > problematic video can be obtained from > http://shows.bluehome.net/kfp_small.vob.One other thing: I can run the DVD through HandBrake (which makes use of libavcodec and libavformat from the FFmpeg project) using Theora/Vorbis and it's perfectly fine.
Keith Richie
2009-Jun-20 06:27 UTC
[theora] Fwd: DVD NTSC video plays twice as fast when encoded with libtheora
---------- Forwarded message ---------- From: Keith Richie <disturbed1976 at gmail.com> Date: Sat, Jun 20, 2009 at 2:23 AM Subject: Re: [theora] DVD NTSC video plays twice as fast when encoded with libtheora To: Jason Self <jason.self at gmail.com> On Sat, Jun 20, 2009 at 1:59 AM, Jason Self<jason.self at gmail.com> wrote:> On Fri, Jun 19, 2009 at 10:56 PM, Jason Self <jason.self at gmail.com> wrote: >> >> https://roundup.ffmpeg.org/roundup/ffmpeg/issue1197 >> >> I had originally encountered this problem using ffmpeg2theora. I >> switched to ffmpeg proper in an attempt to identify where the problem >> was at, and found that the problem persisted. As a result I had >> thought this was a problem with ffmpeg, but the ffmpeg folks seem to >> indicate that this is specific to Theora (too much finger pointing I >> think.) I can confirm that switching codecs does solve the problem, >> though. Anyone care to weigh in? A small section (10MB) of the >> problematic video can be obtained from >> http://shows.bluehome.net/kfp_small.vob. > > One other thing: I can run the DVD through HandBrake (which makes use > of libavcodec and libavformat from the FFmpeg project) using > Theora/Vorbis and it's perfectly fine. > _______________________________________________ > theora mailing list > theora at xiph.org > http://lists.xiph.org/mailman/listinfo/theora >Works fine for me as well. ffmpeg -i kfp_small.vob -croptop 56 -cropbottom 56 -aspect 2.35 -r 24000:1001 -f yuv4mpegpipe - | sh libtheora-1.1alpha2/examples/encoder_example -v 9 - -o small.ogv ffmpeg -i kfp_small.vob -vn -ac 6 -f wav - | oggenc -R 48000 -C 6 - -o out.ogg oggz-merge -o kfp_small.ogv small.ogv out.ogg Here's a link - http://www.zshare.net/download/616138466a701e2c/
Jason Self
2009-Jun-20 06:37 UTC
[theora] DVD NTSC video plays twice as fast when encoded with libtheora
On Jun 19, 2009, at 11:23 PM, Keith Richie wrote:> On Sat, Jun 20, 2009 at 1:59 AM, Jason Self<jason.self at gmail.com> > wrote: >> On Fri, Jun 19, 2009 at 10:56 PM, Jason Self <jason.self at gmail.com> >> wrote: >>> >>> https://roundup.ffmpeg.org/roundup/ffmpeg/issue1197 >>> >>> I had originally encountered this problem using ffmpeg2theora. I >>> switched to ffmpeg proper in an attempt to identify where the >>> problem >>> was at, and found that the problem persisted. As a result I had >>> thought this was a problem with ffmpeg, but the ffmpeg folks seem to >>> indicate that this is specific to Theora (too much finger pointing I >>> think.) I can confirm that switching codecs does solve the problem, >>> though. Anyone care to weigh in? A small section (10MB) of the >>> problematic video can be obtained from >>> http://shows.bluehome.net/kfp_small.vob. >> >> One other thing: I can run the DVD through HandBrake (which makes use >> of libavcodec and libavformat from the FFmpeg project) using >> Theora/Vorbis and it's perfectly fine. >> _______________________________________________ >> theora mailing list >> theora at xiph.org >> http://lists.xiph.org/mailman/listinfo/theora >> > > > Works fine for me as well. > > ffmpeg -i kfp_small.vob -croptop 56 -cropbottom 56 -aspect 2.35 -r > 24000:1001 -f yuv4mpegpipe - | sh > libtheora-1.1alpha2/examples/encoder_example -v 9 - -o small.ogv > > ffmpeg -i kfp_small.vob -vn -ac 6 -f wav - | oggenc -R 48000 -C 6 - - > o out.ogg > > oggz-merge -o kfp_small.ogv small.ogv out.ogg > > Here's a link - > http://www.zshare.net/download/616138466a701e2c/Okay; but you're using ffmpeg to read the original material and then piping to other programs... I don't think this can be done with ffmpeg2theora.