Sorry about the late reply. This was about synchronicity problems in a decoder mpeg2-stream that only turn up when encoding.
> From: Andrew Stevens <[EMAIL PROTECTED]> > The Reason for effects like this are basically, that a DTV audio MPEG-2 > stream may have "gaps" of varying length in the audio. If you simply > decode as a stream the gaps disappear and sync disappears. This is the problem. > Another common Problem is problems caused by varying pull-down in the > original. If you have some 3:2 pulldown material (say some Ads) > where one field of a frame is repeated at playback time simply > decoding frame-by-frame and re-encoding will affect timing. This is not the case, I work with PAL material. > Basically, its pretty complex and to get transcoding to work right > all the time you need a carefully written transcode decoder that > communicates the pulldown information to the video encoder and silence > pads the audio stream being sent to the audio encoder at the right > places. I guess this means "sorry, you lost". A pity. I solved this particular problem by hacking the file apart with a tool I wrote some months ago and encoded every part by itself. That way the problem does not become visible. Between the sections half a second or so becomes lost but between episodes this is not serious. I have sync problems with all of thos streams but they are usually fixable because they are constant. I just hope that this particular problem will stay rare. Thanks, for clearing that one up. ------------------------------------------------------- This SF.net email is sponsored by:Crypto Challenge is now open! Get cracking and register here for some mind boggling fun and the chance of winning an Apple iPod: http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0031en _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
