[FFmpeg-user] theora question

[Tom Sparks]

--- On Thu, 26/4/12, Rick C. <rickcorteza at gmail.com> wrote:

> From: Rick C. <rickcorteza at gmail.com>
> Subject: Re: [FFmpeg-user] theora question
> To: "FFmpeg user questions and RTFMs" <ffmpeg-user at ffmpeg.org>
> Received: Thursday, 26 April, 2012, 10:49 AM
> 
> On Apr 25, 2012, at 1:50 PM, Carl Eugen Hoyos wrote:
> 
> > Rick C. <rickcorteza <at> gmail.com>
> writes:
> > 
> >> On Apr 24, 2012, at 2:08 PM, Tom Sparks wrote:
> >> 
> >>> use the true ffmpeg2theora transcoder
> > 
> >> Actually I made a quick trial using this
> >> and I didn't see a significant difference in speed?
> 
> > 
> > Not very surprising given that ffmpeg2theora is using
> libtheora 
> > and FFmpeg.
> > 
> >> The same example I used previously which was
> getting
> >> only 40fps was about the same with ffmpeg2theora. 
> > 
> >> Quality was a bit better though. 
> > 
> > That is indeed surprising.
> > 
> >> In general does theora just not take advantage of
> multithreading?
> > 
> > Are you sure theora is the right choice for encoding?
> > There should be better and faster codecs for every use
> case.
> > 
> > Carl Eugen
> > 
> 
> 
> Regarding the quality I didn't mean to say that ffmpeg
> couldn't match the quality of ffmpeg2theora with the correct
> settings,
I dont think ffmpeg has the option for theora
> just the settings that I used for my trials which
> was only -qscale 10. 
ffmpeg2theora dose not have a qscale

> I left ffmpeg2theora on the
> default setting which I read was 6 if I'm not
> mistaken.  Anyways, regardless of adjustments I had
> roughly the same speed everytime that's what I meant when I
> said I didn't see any significant changes.
I think you can speed it up by using: -d 1
but it can only be used with --videobitrate 
> Yes this (theora) wouldn't be something I would want to use
> everyday, I was just doing some testing and noticed that
> it's quite slow no matter what I did and I came here to make
> sure it wasn't something wrong I was doing. :-)  So
> seems it's not me but the nature of the codec.  I
> appreciate the help everyone.
what are the other codec you comparing theora to?
> 
> rc
tom
> 
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