So do you expect your implementations on devices with hardware acceleration to 
have any limits on resolution of images they can decode?  I can't imagine how I 
could implement the frame buffers in VP8 in VLSI without having an upper limit 
on both the width and height of the image. How do you deal with that?

I don't know if you ever got the Google VHDL code for VP8 but I have never got 
it so I don't know what it does but if you do, that would be great. 


On Jul 24, 2013, at 12:57 PM, Timothy B. Terriberry <tterr...@xiph.org> wrote:

> Cullen Jennings (fluffy) wrote:
>> There is one thing that as far as I can tell that all the implementors agree 
>> on. None of the implications control the resolution using
>> 
>>   m=video 62537 RTP/SAVPF 96
>>   a=rtpmap:96 VP8/90000
>>   a=fmtp:96 max-fr=30;max-fs=3600
>> 
>> What resolution do you think "max-fs=3600" is? I have no idea. It is not 
>> possible to implement so it is not surprising no one is doing  it. However, 
>> this draft-ietf-payload-vp8 draft says the resolution is specified using the 
>> max-fs and max-fr.
> 
> I can't speak for other implementations, but here at Mozilla, our 
> interpretation of RFC 6236 was that the values specified in imageattr can be 
> completely ignored by either side, if they so choose. That leaves max-fs and 
> max-fr as the only mechanism to indicate a resource constraint that cannot be 
> ignored, and we plan to use it as such.
> 
> See <https://bugzilla.mozilla.org/show_bug.cgi?id=881935> for details.
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