Re: [Live-devel] Interpreting Presentation Time

2013-02-19 Thread Jesse Hemingway
I realized that there is semi-documented support for manually getting ping times via RTSP, by sending an empty GET_PARAMETERS command. The round-trip latency can be measured from the response time. Apparently this is problematic on certain servers, which do not respond to that command after the P

Re: [Live-devel] Interpreting Presentation Time

2013-02-19 Thread Jesse Hemingway
I see - thank you. That was a bit of a sanity check. In our case, we need to keep server-to-client latency low and predictable. Our use case is indeed like the exception you mention, with multiple receivers in the same 'room' that need to stay synced, i.e. having similar requirements as VoIP app

Re: [Live-devel] Interpreting Presentation Time

2013-02-18 Thread Ross Finlayson
> Sorry if this is a stupid question, but I can't fully understand how > Live555's Presentation Times are to be applied, *aside* from synchronizing > parallel media streams. That's correct. The presentation time indicates the time of each frame, relative to other frames of the same media type,

[Live-devel] Interpreting Presentation Time

2013-02-18 Thread Jesse Hemingway
Sorry if this is a stupid question, but I can't fully understand how Live555's Presentation Times are to be applied, *aside* from synchronizing parallel media streams. Is there any way to use these presentation times to determine the receiver's time offset from the server? In my case, I'm trying