Saving video streams

[Mirabeau2Code]

Describe the feature

Is there a possibility to add methods for saving video streams? (in the gortsplib or in your rtsp-simple-server project)

For example optional:

either the constant flow either the flow per duration slice (1 file per slice) either the "cyclic" flow of a determined duration (save the last hour for example) thank you for the beautiful work done, it helps me to learn Go ;)