Audio and Video synchronization

New product: VCL components for displaying and controlling IP cameras, webcams, video conferencing, video chats
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gluk67
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Joined: Fri Oct 19, 2018 2:31 pm

Audio and Video synchronization

Post by gluk67 » Fri Oct 19, 2018 2:39 pm

hi,

I tried RVMedia White and Gray Ip addresses and i saw a lot of lag in receiving audio between two PC in local network.
Is it possible to regulate receiver (or sender) in order to have Video and Audio synchronized?

Sergey Tkachenko
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Re: Audio and Video synchronization

Post by Sergey Tkachenko » Mon Oct 22, 2018 7:47 am

This is a known problem.
Video frames are displayed as soon as they are received, without delay.
Sound is played with delay specified in TRVCamReceiver.AudioLatency property. It is necessary to add some delay before playing sound, to make sure that all necessary sound fragments are received.

If you have good connection, you can decrease value of AudioLatency property.

We are working to add similar delay to video, to display it synchronized.

gluk67
Posts: 3
Joined: Fri Oct 19, 2018 2:31 pm

Re: Audio and Video synchronization

Post by gluk67 » Mon Oct 22, 2018 3:43 pm

Are you talking about VideoLatency?
When do you thing we can count on Syncrhonization effect?

Sergey Tkachenko
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Re: Audio and Video synchronization

Post by Sergey Tkachenko » Mon Oct 22, 2018 4:11 pm

Yes, there is TRVCamReceiver.VideoLatency property, but it does not delay video like AudioLatency do for audio. We are working to modify VideoLatency to work like AudioLatency. Ilya is working on it, he said that it can be done in a couple of days, but I cannot say when a new version will be uploaded, because our working version has untested changes related to porting to FireMonkey.

gluk67
Posts: 3
Joined: Fri Oct 19, 2018 2:31 pm

Re: Audio and Video synchronization

Post by gluk67 » Wed Oct 24, 2018 6:30 pm

Ok guys, if you confirm me that synchronization audio video will be possible very soon I will buy the package.
Let me ask one more thing: is it possible to count on echo cancellation for voice chat?

Sergey Tkachenko
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Re: Audio and Video synchronization

Post by Sergey Tkachenko » Thu Oct 25, 2018 5:05 pm

Yes, we plan to implement the synchronization very soon. We can provide a beta version to you before the official release.

But we do not plan to implement echo cancellation in near future, sorry.

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