[streaming] How to interpret udp-caching option?

[Xiaolin Cheng]

Hello all,

I am a bit confused about the meaning of udp-caching. Its default value is 300ms. Does it mean end-to-end delay? What exactly does udp-caching mean? If a packet arrives after 300ms it has been sent out, will it be dropped by VLC? If it is the case, then how is the delay measured in case of clock skew between machines?

If it is not the case, then what does it mean? The size of buffer? How can define the size a buffer as a time unit?

I googled online and find that 300m is the maximum delay for video-conferencing applications. In one-way streaming cases, delay does not matter much if we have a nice buffer. The purpose of buffer is to absorb jitter. In this case, what does udp-caching mean?

Thanks for your patience to read along my question and offer your suggestions.

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