[MEncoder-users] Converting H.264-AVC 1920 X 1080 to mpeg-2

[belcampo]

L Lee wrote:
> On 2/19/09 4:26 PM, "belcampo" <belcampo at zonnet.nl> wrote:
> 
>> I have interlaced h264 files in an mp4 container, which an can trancode
>> the following way
>> MP4Box -raw 1 nameof.mp4
>> MP4Box -raw 2(wanted audio-channel number) nameof.mp4
>> after that you have nameof_track1.h264 and nameof_track2.ac3 (or other
>> extension which depends on the source of your audio track.
>>
>> I transcode these raw files with ffmpeg, but mencoder will also be
>> possible to de desired, in your case dvd-format.
>>
>> Hope it helps
> 
> 
> Thanks very much, belcampo, for these suggestions. Mplayer and mencoder can
> seem to take these raw files generated by MP4Box and output video from them
> with excellent picture quality, only I don't know how to tell Mencoder how
> to establish frame selection or frame rate.
I use ffmpeg, they -ss (for starting point, 00:01:30.12) and -t for 
duration. Don't know mencoder equivalents, but they have them, but AFAIK 
  they are 'inacurate/broken'. Could you provide a short sample, I'll 
have a look at it.
  When I try to use any of the
> pullup constructs I've collected or even if I try no pullup at all, I just
> see constantly appearing notifications of duplicate frames during
> processing, and the resulting output contains extremely haphazard motion
> from slow motion to jerks to stutters to freezes. Please offer suggestions
> about how to establish mencoder's frame selection and frame rate when
> converting the files from MP4Box to mpeg-2. Thanks again.
> 
> Laine
> 
> 
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