Question / Help Capture card + resolution change = desync

Sou

Member
Log: http://pastebin.com/dpyKubtJ

So I got SC-512N1-L/DVI capture card (second PC).

Before WIN10AU update I used "Audio Output Mode: Output desktop aduio (WaveOut)" and I could see my device in the mixer "with sound". Everything was ok;)

Right now when I use this setting my device has now sound, it is only in "desktop" bar. OK that wouldn't be a problem BUT

When I change resolution (turning on game or alt+tab) my capture card is like "inactive" for 1s, and I hot this 1s added to my audio delay... :/

With the setting "Audio Output Mode: Capture audio only" this there is no delay added and everything after 1s comes back to normal and synced.

I tried changing almost all the capture device settings, reinstalled audio drivers etc. Nothing helped:/

I am able to recreate this desynchronization just by alt+tab from any game.
 

Sou

Member
Ok I rolled back my windows ver to 1511. Didn't help:/ I checked it also in my old OBS and it is same (delay added to audio after every "resolution change". I checked also in newest xsplit, in xsplit it doesn't matter if I output audio to desktop or not, delay is added anyway.
 

Fonic_Artes

New Member
Try using AmaRecTV to import your capture, as it holds its own program and output it should help when you port that into OBS.

You can get that here. http://www.amarectv.com/download_amarectv.htm
There should be a live_setup300 in the files as well just use it to install the "live" part which allows it to be captured as a webcam/capture card.

It has its own audio output and capture so that should help.
 

Sou

Member
Ok, so I tried my Avermedia and everything is ok.

Try using AmaRecTV to import your capture, as it holds its own program and output it should help when you port that into OBS.

I couldn't make AmaRecTV work BUT I used AmaMix to capture audio and send it to desktop... results are same as with OBS capture. I got desync o_O It is not so big ( for example 2xalt+tab in capture card>obs>desktop audio makes like 2 sec desync, with AmaMix it is ~300ms). But anyway... it is not working:O I tried sending audio to Virtual Cable, didn't help:/
 

Sou

Member
AND, I can see Latency in the AmaMix, after alt+tab (resolution change from 1920x1080 to some lower res) it is stable but after going back to 1920x1080 it is rapidly growing to 150ms and than slowly going down to stable ~ 15ms .

WTF?

I is a solution because I can live with 5 sec of desync after changing resolution... but why does it work like this? It didn't before:/
 
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