[MPlayer-users] about film2pal telecine

Giacomo Comes comes at naic.edu
Mon Sep 25 20:38:07 CEST 2006


Hi,
I have been experimenting with the film2pal mpeg telecining option.
So far I have not found any problem with the option itself.
But I did have some trouble processing mpeg telecined with film2pal.

For example, if I copy a film2pal mpeg with:

mencoder -of mpeg -mpegopts format=dvd -ovc copy -noskip -o out.mpg in.mpg -oac copy

the copy work but the last seconds of the movie are missing. To be more precise, if 
T is the duration of in.mpg, the duration of out.mpg is about T*24/25.
Experimenting, I have found that if I use the following command:

mencoder -of mpeg -mpegopts format=dvd -ovc copy -noskip -o out.mpg in.mpg -ofps 24000/1001 -mc 0 -oac copy

then the copy is perfect.
So if I know in advance that the mpeg is film2pal telecined, I can use the correct
options for a perfect copy.
The problem, so far, is that I have found no way to detect a film2pal
telecined movie. With the classic NTSC telecined movie mplayer shows the message:

demux_mpg: 24000/1001fps progressive NTSC content detected, switching framerate.

that can be used to identify NTSC telecined mpegs.
But no such message is displayed for film2pal mpegs. Is there any way to identify
a film2pal telecined mpeg? It would be enough if mplayer showed the switching 
framerate message also for the film2pal mpegs.

Giacomo



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