[MEncoder-users] compression test

[Tobias Brockamp]

Am 18.10.2007 um 16:30 schrieb Tobias Brockamp:

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

sorry, i get by myself. just a little bit confused for a moment :-)

>
> 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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>
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