Question: Why using Sample.duration to calculate rtp timestamp?

[tubzby]

https://github.com/webrtc-rs/rtp/blob/ee39d4ea79bd33c01b5b802abdffb183ef586416/src/packetizer/mod.rs#L137

webrtc/webrtc/src/track/track_local/track_local_static_sample.rs

Line 137 in 4bb9614

let samples = (sample.duration.as_secs_f64() * clock_rate) as u32;

For each Sample we do have a timestamp field, but to detect the duration we might need 2 samples in which 1 frame lag will be introduced.