[Ffmpeg-devel] Video compression and quality of codecs.

Loren Merritt lorenm
Wed Apr 12 20:06:06 CEST 2006

On Wed, 12 Apr 2006, Bogdan Mustiata wrote:
> Robert Swain wrote:
>> Bit rate 2750, KB/s 29-31.... uhhh? Do you understand what bit rate is?
> Bits per second, and yes I see the values are obscene... Anyway the KB/s were 
> measured with a firewall, so I don't think they are wrong.

That's not the point. The problem is that 2750 != 29-31.

>> Probably a case of misuse of the h.263 codec if the quality difference is 
>> _huge_ versus the current WMV9. Not to say that WMV9 shouldn't "beat" 
>> h.263, but I wouldn't have thought the difference would be huge. (h.263 has 
>> in-loop filtering doesn't it? Or is that h.263+? Or am I insane? :))
> As I recollect it doesn't have  in-loop filtering, only h264 has (I may be 
> wrong too :D )

Yes, h263+ has an in-loop deblocking filter. h261 did too, though it 
worked differently.

--Loren Merritt

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