[MEncoder-users] compression test

[Tobias Brockamp]

Can someone tell me the formular how i get the quality value in % for  
the
specific video file?

Am 18.10.2007 um 01:45 schrieb Michael Rozdoba:

> Tobias Brockamp wrote:
>> Am 17.10.2007 um 22:04 schrieb Guillaume POIRIER:
>>
>>> On 10/17/07, Tobias Brockamp <tobiasbrockamp at gmx.de> wrote:
>>>> hi,
>>>>
>>>> is there a way to make a compression test with mencoder like it is
>>>> implemented f.e. in stax rip or gordian knot?
>>>>
>>>> these tools take 5% off the video footage and outputs a quality  
>>>> value
>>>> in % for the given target size, this is how i understand it.
>>> tuxrip is a script that uses mencoder and does what you are
>>> requesting.
>>
>> thanks, looks good. i hope i can easily port this to windows.
>
> If you have any problems, as you're using Windows why not make use of
> AviSynth? SelectRangeEvery(300,15) or similar is the function you're
> after. Then run that through MEncoder with the codec set to give a
> constant high quality with few, if any, restrictions on quantisers.  
> The
> resulting compression ratio should be a rough guide to compressibility
> of that source by that codec. E&OE.
>
> -- 
> Michael Rozdoba
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