[MPlayer-users] Convert 23.97fps to PAL 25fps w/o duplicate frames

[Greg Trounson]

On Sat, 26 Mar 2005, D Richard Felker III wrote:

> On Sat, Mar 26, 2005 at 12:59:51PM +1200, Greg Trounson wrote:
>> Hi,
>>
>> I'm trying to master some clips to PAL DVD, using mencoder -> avidemux ->
>> dvdauthor, with as high a quality as possible.
>>
>> If my sources are 23.97fps NTSC, then I need to convert them to PAL frame
>> rate before passing it to avidemux (avidemux automatically takes care of
>> the resolution).
>>
>> mencoder -ofps 25 doesn't cut it, since it inserts duplicate frames,
>> producing an irritating jerkiness every second or so when played back.
>> Commercially made DVDs get around this by just speeding up the playback
>> rate 4%, so every single frame is played, but the action is slightly
>> faster and the sound is slightly higher pitched (nearly a semitone, I'm
>> told).  This is why Region 4 DVDs generally have a shorter running time
>> than Region 1.
>>
>> My question is, how can I get mencoder to convert a movie clip to 25fps
>> by /only/ speeding up the video and audio playback rate (ie without
>> duplicating frames)?
>
> Use latest cvs and pass the option -speed 25025/24000. You'll also
> need -srate 44100 or 48000 to force the audio to get resampled back to
> a valid samplerate for encoding, and you might want to include -ofps
> 25 too just to make sure a slight error doesn't result in it being
> 25.0001 fps or something stupid.
>

Thanks, I'll give that a go.  Is "-speed" enabled as an encoder option 
in 
CVS?  I notice it's player only in current releases.

Greg