Hi Torsten, On Sun, 2003-01-19 at 21:40, Torsten Mohr wrote: > When i open that stream and read out the informations in it i get: > > Video frames: 438 > Video rate: 25.00000 frames per second > > Audio channels: 1 > Audio Bits: 16 > Audio Rate: 11025 > Audio Samples: 192413 > > I try to check the audio sample number now: > > 438*11025/25 is 193158, that's higher than the number in the stream. > > 437*11025/25 is 192717, that's still too high, though i took one > frame less.
You don't know the exact practical sample rate. The requested sample rate is 11025, but audio card clocks are often biased a bit. > So when i read in video frames from TWO streams, the audio size > of the first one may be 438, the second one 440. This leads > to complicated algorithms for mixing the audio data. Well, yes. You'd need to either resample the audio or just accept that audio can be slightly time-biased within frames (just try to keep this in track by using a total_audio_samples counter). Mixing audio isn't that simple, I fear. Anyway, I don't have much experience here either, others might be able to give much better advice. Ronald -- Ronald Bultje <[EMAIL PROTECTED]> Linux Video/Multimedia developer ------------------------------------------------------- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
