theora - Jun 2009 - 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.

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.

---------- 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/

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.