What exactly does 'Duration' of Sample struct do?

[luxi78]

Hello guys,

I‘ve found many snippets like :

if ivfErr = videoTrack.WriteSample(media.Sample{Data: frame, Duration: time.Second}); ivfErr != nil {
   panic(ivfErr)
}

in examples,but not sure the role of Duration. Can someone tell me the details about it?

Thank you!

[Sean-Der]

Hey @luxi78

When the media is packetized in RTP this is used the generate the Timestamp values.

This is used to generate the sample count here which is then passed into pion/rtp.

This then is used here to increment the Timestamp here

[luxi78]

Got it, thank you Sean.