Archived from groups: rec.video.desktop (
More info?)
On Sun, 25 Apr 2004 14:27:06 +0000 (UTC), "Speed Dialer"
<dontyousp@m.org> wrote:
>> is there a way to edit an mpeg2 file that is encoded as 24 fps so that it
>> would play back at 25 fps and still maintain sync with the audio?
>>
>> this is to allow me to burn a movie (after inverse telecined) as a
>> progressive PAL dvd with no duplicate frames
>>
>If your MPEG2 file is 24fps(23.976?), then it's probably NTSC and will have
>to be re-encoded to PAL resolution. You need to re-sample/stretch the audio
>to fit the new duration. It's about a 5% speed change and isn't very
>noticeable.
As has been pointed out, the resolution will require tweaking,
so you're going to have to reencode it with the new frame size and
frame rate. The easiest way to convert it is to use AVISynth (and its
MPEG decoder plugin) with a very simple script. It would look
something like this:
MPEGSource("DRIVE:\FILENAME.MPG")
AssumeFPS(25,sync_audio=true)
LanczosResize(720,576)
Go to www.doom9.org and look up info there on how to use
AVISynth for something like this. Their forums are also full of info
about NTSC to PAL conversions.
-----------------------------------------------------
Neil Nadelman arvy@navzr-genafyngbe.pbz (ROT13)
-----------------------------------------------------
I have no fears in life,
for I have already survived Theta-G!