Lip sync error

[omcar17]

Hello,
Thank you for the excellent work and publicly available code.
I am using syncnet to find if there is lip-sync error in the video. I am getting very random values of AV offset and confidence, after using the train weights available on official website.

I am confused about this paragraph from the paper -

Determining the lip-sync error -
To find the time offset between the audio and the video, we take a sliding-window
approach. For each sample, the distance is computed between one 5-frame video
feature and all audio features in the ± 1 second range. The correct offset is when
this distance is at a minimum. However as Table 2 suggests, not all samples in
a clip are discriminative (for example, there may be samples in which nothing
is being said at that particular time), therefore multiple samples are taken for
each clip, and then averaged.

I am missing something in this paragraph. How do I collect multiple samples for each clip?
I would like to know how to get a proper value of metric (AV offset, Confidence) that show the out of sync of video and audio on sample.

Thank you