> From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > ] On Behalf Of Kumar Bala > Sent: 30 July 2008 11:12 > To: [email protected] > Subject: Measuring MPEG4 system latency on DM355 > > Hi, > I have an MPEG4 streaming system which capture live video at > 1280x720p using a HD camera module. Then it streams it over > to a PC running the client app such as VLC or mplayer. > > I believe I get a few hundred millisecond latency (about > 200-300 ms). We want to achieve a near analogue latency.
Let's see, I'm not an expert but: 40ms to read in a frame (assuming 25fps) 30ms to encode Some amount of time to transmit the frame to receiver and have it decoded, then 40ms display time So I recon that's around 120ms minimum assuming instant transmit and decode, and no waiting for extra VSYNC on the receiver or anything.. -- Jon Povey, Design Engineer [EMAIL PROTECTED] | +44(0)1280 825983 Racelogic is a limited company registered in England. Registered number 2743719 . Registered Office Unit 10, Swan Business Centre, Osier Way, Buckingham, Bucks, MK18 1TB . The information contained in this electronic mail transmission is intended by Racelogic Ltd for the use of the named individual or entity to which it is directed and may contain information that is confidential or privileged. If you have received this electronic mail transmission in error, please delete it from your system without copying or forwarding it, and notify the sender of the error by reply email so that the sender's address records can be corrected. The views expressed by the sender of this communication do not necessarily represent those of Racelogic Ltd. Please note that Racelogic reserves the right to monitor e-mail communications passing through its network _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
