[Libav-user] Reducing latency of file opening (when playing from http)

Carl Eugen Hoyos cehoyos at ag.or.at
Sun May 12 17:43:46 CEST 2013

Kalileo <kalileo at ...> writes:

> This is also what I noticed, when playing with 
> probesize and analyzeduration trying to get the 
> player to start more quickly (using mpegts 
> (h264/aac) streams served through a memory buffer).

Since I did not really understand the paragraph I cut:
Do you mean that although you used -probesize and 
-analyzeduration, the time to probe a file did not 
If yes, this sounds like a serious bug that should be 
(Needs command line, console output etc.)

> This leads to the question why does a known stream 

(What is a "known" stream?)

> need to get probed / analyzed at all?

I may miss something but I wonder how you want to 
demux a transport stream without some probing / 
there are many tickets from people who miss their 
subtitle streams when opening their file...

Additionally, user streams without PAT and/or PMT 
are not unusual (there used to be a bug in *zap 
for many years), so careful probing in transport 
streams is particularly important afaict.

Carl Eugen

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