Pas 2 air When watching a clip or vidéo only Sound no images

AiAd air 2 l'astuce génération When watching a clip or vidéo only Sound no images

I once ran into this and was fortunate enough to have lots of time to research the problem.
MPEG2 has this unusual feature in that the video stream is, effectively, variable frame rate. There is no fixed rate at all; instead you get a bunch of so-called presentation timestamps - one for each frame, in fact. The audio stream also has them. Hardware and software that plays MPEG2 streams must know how to use these to sync up audio, and they do.
When you import such a stream into a video editing software, it would usually make certain assumptions about the frame rate, because things are already complicated enough even with a constant framerate. Most of the time the video is actually timestamped at regular intervals throughout the entire stream, so the assumption doesn't cause audio desync.
However, if you have noisy analogue splices in the original video you captured, the presentation timestamps produced by a capture card might have large jumps in them. Conventional players recover trivially by using the timestamps to realign the audio straight away. I haven't, however, yet seen any video editing packages that do this out of the box.
I'm not aware of any existing scripts for fixing this in Premiere, but I've seen one that makes use of Avisynth. I could try digging it up if anyone cares.

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