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 > -- Albert Burbea Harishonim 8 Ramat Gan 52502, Israel Tel/Fax + 972-3-7526016 Mobile: +972-52-3541842
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