[Libav-user] Using libavformat for LowLatency Dash

Simon Brown simon.k.brown at gmail.com
Wed Mar 4 12:30:41 EET 2020

> On Tue, 3 Mar 2020, 22:25 Carl Eugen Hoyos, <ceffmpeg at gmail.com> wrote:
>> Am Di., 3. März 2020 um 19:02 Uhr schrieb Simon Brown <
>> simon.k.brown at gmail.com>:
>> > Can anyone help with a) getting a bitrate measure from the libav
>> libraries?
>> I may misunderstand but in general you cannot know the bitrate of a (raw)
>> input stream (and libavformat does not read through the whole file only
>> to find out).
>> Carl Eugen
>> ____________________________________
> Thank you, Carl. It's actually a live stream so I need to calculate it as
> it comes in. I was hoping there might be a means of helping to calculate
> it, work out size of each frame as it's come in.
> Cheers,
> Simon

Can anyone help with question b) then?  "b) explaining the s and d values
in the mpd file, and what significance their differences might be causing?"
Where s and d are the parameters in the SegmentTimeline field.

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