frame in dv

czesc.list's icon

Hi,

I absolutly need to be able to play a movie in dv format from a given image
to an other one.
I tried the frame message but the film is all jerked...
I tried with the dumpframe message but then speed of the movie playback
depends on its size...

What can i do ?
Do you have a solution ? a patch that i could have a look at ?
Please, time is not on my side :-)

Thanks
Czesc

Wesley Smith's icon

Something like this should work. Next time you might want to post
your patch as it makes it easier for people to help.

Max Patch
Copy patch and select New From Clipboard in Max.


auvi@auv-i.com's icon

It's a bit unclear exactly what you're trying to do. But if you are trying to synchronize playback of two movies, send one jit.qt.movie object a "gettime" message, then parse the result from the right outlet dumpout to send the other jit.qt.movie object a "time $1" message. If you need synchronized playback from different points in each movie, add or subtract from the number used with "time $1".

auvi@auv-i.com's icon

It's also worth noting that source material in any codec that uses temporal compression (such as DV) does not gracefully handle jumping to new random points in the file. A codec that uses spatial compression only (such as Photo-JPEG) will do better with this.

Joshua Kit Clayton's icon

FWIW, DV does not use inter-frame (aka temporal) compression, though,
spatially and chromatically, is more lossy than high quality photo-
jpeg. If performing a sizeable number of "bounces" through some
processing network, I would recommend a lossless codec such as
Animation or PNG (the latter is much more bandwidth/diskspace
friendly than Animation):

More information, including examples of loss through iterated
decoding/encoding at my favorite codec site:

-Joshua

vade's icon

Wow that is a great resource. Thanks for the heads up. Ive read Adam
Wilts site before, but somehow have never seen this..

v a d e //

www.vade.info
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