Synchronizing appsrcs that subscribe to appsink on different times

[Sebastian Dröge]

On Wed, 2016-12-14 at 12:54 +0200, Mert Can Ergun wrote:

> How can I solve this seemingly synchronization problem to achive multiple
> mapping(mount) point RTSP server on the same source pipeline?

You need to translate timestamps from one pipeline to the other. In the
simplest case if both are running on the same clock this means
basically (between the appsink and appsrc):

1) Get running time for the PTS/DTS based on the segment
2) Convert to clock time with the base time of the appsink
3) Either add the configured latency of the appsink pipeline to the
clock time, or configure that latency as the min-latency of the appsrc
4) Convert to running time of the appsrc with the base time of it
5) Convert the running time to a buffer PTS/DTS based on a default [0,-
1] segment for the appsrc (that's what it is configured to by default)

If both pipelines are running with different clocks, then an additional
step is needed between 3) and 4).

-- 
Sebastian Dröge, Centricular Ltd · http://www.centricular.com
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