Syncing streams to clock in the middle of pipeline

[Alexey Chernov]

Hello,

I faced some rare use case, seems I need to sync streams against pipeline 
clock in the middle of it instead of on the sink elements. Here's a pipeline:

Audio: appsrc -> aacparse -> queue   \
                                                          mpegtsmux -> appsink
Video: appsrc -> h264parse -> queue / 


The problem is that there seem to be GST_FORMAT_BYTE segment after 
mpegtsdemux, and appsink synchronization is literally useless. The pipeline 
pulls my data through appsrc and push it to appsink as fast as it can. And I 
need it to pull data at the realtime playback speed, as if there were sinks in 
the end with 'sync'=true. Pulling from appsink at desired rate doesn't match 
as in this case I got artifacts and incostistent playback at the very end of 
the chain where I transmit data from appsink through the network.

Is there any element or technique to sync streams to pipeline clock somewhere 
in the middle of it, where GST_FORMAT_TIME segment still exists (somewhere 
after queue elements)?

I looked at multiqueue element and its 'sync-by-running-time' property, but 
it's described to 'Synchronize deactivated or not-linked streams by running 
time' and it seems to be for some broken streams and not for my use case.

Thanks in advance for any help!

Best regards,
Alexey Chernov