Hi, Thats what I do now, I have a ping-pong buffering scheme. Jon, thanks for the information. Any idea what the best systems offer. Coz we want to beat that !
Albert Burbea wrote: > hi > actually it can be less (you can transmit while you encode and encode while > you get video) but it is VEEEEEEERY expensive. You have to buy heavy 3rd > party video codecs. > What is your problem? Maybe we can help you > Albert > > > On 7/30/08, Jon Povey <[EMAIL PROTECTED]> wrote: >>> 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 >> > > > > > ------------------------------------------------------------------------ > > _______________________________________________ > Davinci-linux-open-source mailing list > [email protected] > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
