A/V sync Identification

[smaniramkrish]

I am Begineer in Avisynth.

I would like to know how to identify whether a test clip have A/V sybnc through Avisynth automatically. Any functions available to do this

[Guest]

There are no functions to do that.

[smaniramkrish]

@ neuron2 so in that case if my audio sampling rate is not equalivatent to the original rate can it be assumed that there is a A/V sync issue

[Guest]

No. You can have less samples per second but they get played at a slower rate so that the playing time is the same.

Do you have a problem processing a stream? It might be better if you describe the actual problem you face.

[smaniramkrish]

@ Neuron2. My issue is that I have a video which looks like having video audio sync issue. But I need to validate it is that really a sync issue which not able to identify visually as the audio is background to the video so no lip detection available.

[Guest]

If you cannot identify it by watching what difference does it make?

Anyway, first you say it appears to have a sync problem and then you say you can't identify it. What the heck are you trying to say? Why do you think there is a sync problem?

What is the source file format and where did you get the file?

[smaniramkrish]

Ok let me rephrase it. I have video file (.avi) that was dance and music. But some dance movements do not sync up correctly with music. I don't have the original file again to revalidate it. I doubt it could be a sync up issue. I want to ascertain whether the sync up issue is present or not.

[Guest]

You're trying to analyze/fix a stream that you no longer have?

And you now say the file you do not have does not sync up but you don't think it's a sync up issue. Your posts sound like a Monty Python skit!

Anyway, as you are now on rule 6 territory, you'll have to clarify all this in a PM to me to get this thread re-opened.