Hi Ken, Ross,

I just wanted to add there is one extra possibility here.  We have noticed some 
cameras, especially HD cameras, split images across more than one slice.  In a 
vast majority of cameras the sequence is:

SPS PPS IDR -> SLICE -> SLICE -> SLICE...

Where -> indicates the image boundary.  However in some HD cameras we have seen:

SPS PPS IDR IDR -> SLICE SLICE -> SLICE SLICE -> SLICE SLICE.

If you do not group all the correct parts of an image together when you decode 
each *image* the you can see the green distorted video.

Just putting it out there as another possibility.

Kind Regards,

Ken Ferguson.

On 26/09/2014 19:06, Kenneth Forsythe wrote:

For servers I have two commercial H264 cameras and one instance of 
live555MediaServer.exe running stock. VLC can connect fine to all three. No 
problems here (as far as I can tell).

My client, on the other hand only works for the live555MediaServer and one of 
the cameras. The other camera, after receiving the data and delivering to the 
decoder/renderer and am seeing green distorted video, complete gobbly-gook. 
There doesn't appear to be any connectivity problems nor buffer size error 
messages.

So I wanted to see if my rtsp code handling is correct or if I need to do some 
extra work before the data is delivered to the decoder (I am new to this and 
figuring it out as I go along). As I mentioned before:

/What I am doing is quite similar to what I see in 
H264or5VideoFileSink::afterGettingFrame. On first frame I am prepending the 
data with [startcodes][sps] and [startcodes] [pps], (sps,pps was captured 
earlier on when setting up the subsession). After first frame the data is only 
prepended with the start codes. Is there something else I should be doing, ie 
analyzing the nal type and modifying differently? Or do you think the problem 
could be outside the stream and more in the area where I am  setting up the 
video information?/

Thanks,

Ken

*From:*live-devel [mailto:live-devel-boun...@ns.live555.com] *On Behalf Of 
*Ross Finlayson
*Sent:* Friday, September 26, 2014 1:24 PM
*To:* LIVE555 Streaming Media - development & use
*Subject:* Re: [Live-devel] rtsp client -> h264 decoder

OK, so perhaps it would be best if you clarified what specific problem you are seeing.  
Is it a problem at the server end, at the client end, or both?  And where specifically 
are you using the "LIVE555 Streaming Media" code?  In your server (i.e., 
camera), in your client (i.e., media player), or both?

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/



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