Re: [rtcweb] Proposed Video Selection Process

Maik Merten <maikmerten@googlemail.com> Fri, 22 November 2013 17:43 UTC

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Date: Fri, 22 Nov 2013 18:43:21 +0100
From: Maik Merten <maikmerten@googlemail.com>
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Subject: Re: [rtcweb] Proposed Video Selection Process
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Am 22.11.2013 01:57, schrieb David Singer:
> well, it’s band-limited and hardly compressed, but within those limits it’s OK.  Whereas I seem to recall having trouble getting decent quality out of H.261 no matter what I did with it (but it has been *years* since I used H.261 for  anything, and it’s only because I am an old geezer that I used it at all).


I provided some samples at

https://drive.google.com/file/d/0B11N4VzriA21Z2J2ODlxTmFibmM/edit?usp=sharing

I'd say H.261 can do pretty okay-ish at around a Mbps (and is already 
useful, if not pretty, well below that), but pushing to "visually 
lossless" has unfavorable bitrate implications: I have a "normal users 
won't see the difference from the original" encoding of that testing 
sequence (complete with analog noise from the camera preserved), but it 
weighs in at 5 Mbps.

I would love to try out the QuickTime H.261 encoder, btw. Not sure it's 
still shipped, but I understand a *de*coder is still there? 
http://support.apple.com/kb/ht3775


Maik