[x264-devel] Re: Response from a vendor

[Michael Kazmier]

Hi Peter,

> Does anyone here know a little bit about compability between
> x264 and Envivio or Main Concept ?

I have two Envivio encoders (B3 Professional) in house and we routinely 
test against other encoders including x264.  The vendor is partially 
right about the decoder being fine-tuned for different encoders. 
Primarily the differences we have seen is that each encoder vendors 
implementation of encapsulation (we use MPEG2 Transport Streams not 
ISMA) is slightly different and that is where the real problem lays. 
There are some suttle configuration changes you can make to force IDR 
frames as well (in the Envivio for example).  So you'll want to make 
sure that x264 is using a similar setting.  Also, I know that until 
recently (two weeks ago) the Envivio encoder produce non-compliant B 
Frames and this was a major hurdle as several STB vendors setup their 
STB to "work around" the problem.  For whatever reason, the industry has 
  pushed the modifications to the STB vendors and not the encoder 
vendors - go figure.

> I suspect the STB vendor is missing implementing some of the H.264
> elements that x264 is supporting, but still investigating.

My suggestion is make the stream as simple as possible, use VLC with 
MPEG2 TS output instead of ISMA 2.0... other than that, find a new STB 
vendor?

--Kaz

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