> 2012/2/15 <[email protected]>: > >> assume its because of the RTSP codec and timestamps not being the most >> accurate. >> I am keen for advice on constructing the filter you mentioned, are there >> any tutorials? > > I think more probably timestamps are ok, but inter-frame interval > (FPS) may be not very accurate. And maybe overlay filter just gets one > frame from one source, and one from another, and puts together, thus > if one camera may "forget" to send particular frame sometimes, the > second source will "be late" on visualization. If we had a filter that > forces constant frame rate, this could be solved. (Just speculations > again) > >> Also a bit of a NooB Q. but is there a way to update/change parameters >> once the cmd has been started? In particular if we can get this delay >> fixed, I am assuming some form of drift over a 60+ period and we would >> need to dynamically adjust this over time. > > For cmdline util, it's impossible. For API that's re-initializing all > filtering stuff. You can do it, but it's a lot of code. You must read > your streams and push to filters manually, not by 'movie' filter. > > -- > Andrey Utkin > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user > Your a good man for helping this far Andrey. One last Q for this. I am trying to understand the mapping between the pix_fmt and fourcc. ie if I want to output rawvideo for fourcc AYUV how do I work out what the pix_fmt version is?
Thx again Art _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
