Sebastian Spiess <[email protected]> writes:
> I've started using mencoder to reduce size of the videos I take with
> my digicam.
>
> up to now I've used something along the line of mencoder P1020451.MOV
> -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1000 -oac mp3lame -lameopts
> cbr:br=96:mode=3 -of avi -o wallaby.avi
>
> as I have not much of a clue I used these settings and they gave me
> much smaller videofiles which play on my ubuntu with no problems.
>
> But as you can see I use mpeg4 and not ogg. What would be a good
> setting for ogg?
That depends entirely on what your input and output requirements are,
I fear, and there is no one-size-fits-all answer.
Oh, and you didn't specify if you are after the OGG video, audio,
container, or whatever. :)
That said, the lavc codec, under which I presume the Ogg Theora output
lives comes from the ffmpeg project; their documentation, and the Ogg
project documentation, should be a reasonable starting point.
> Do you have any suggestions for optimising the video compacting?
Use exactly as many bytes as required to achieve the quality you want.
Seriously, no, not really, because there isn't anything terribly generic
to say. As an example, denoising is good for reducing size ... except
when it isn't, and causes visual artifacts or increases video size.
The same is true of a bitrate: it varies with both codec and content, or
audio encoding, which varies based on playback device, or ... yeah.
You get the idea.
Daniel
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