[MEncoder-users] How to convert from uncompressed yuv420 video to rgb 24?

[James Hastings-Trew]

The Wanderer wrote:
> gerlos wrote:
>
>   
>> The Wanderer ha scritto:
>>
>>     
>>> gerlos wrote:
>>>
>>>
>>>       
>>>> Hello everyone! I captured  many uncompressed videos (tens of
>>>> GBs) from my webcam for astronomical processing.
>>>>
>>>> The format is YUV420, but my processing software doesn't
>>>> understand this format, and need rgb24, so I need a way (possibly
>>>> an automatic way) to convert all these files.
>>>>
>>>> Reading the documentation it seems to me that it's possible with 
>>>> mencoder, but so far I couldn't find how... any clue?
>>>>
>>>>         
>>> I've never had occasion to do this myself, but from searching the
>>> man page for 'colorspace', I think that '-vf scale' (and possibly
>>> '-vf format') might be what you want.
>>>       
>> I'm not sure, but maybe I'm almost there...
>>
>> I tried this command:
>> mencoder Dark_20090222_0139_011.avi -ovc raw -o out.avi -vf
>> format=rgb24 scale=640,480
>>     
>
> I think there's a mistake here in '-vf' syntax. Instead of a space
> between the filters, try a comma: '-vf format=rgb24,scale' (you probably
> also don't need the explicit resolution on the scale filter, since
> you're just having it perform colorspace conversion).
>
>   
And also, the format the scale command is wrong. -vf scale=640:480