[MEncoder-users] green noise using -vf yadif

[Tobias Brockamp]

Am 25.07.2008 um 19:54 schrieb Brian Penick:

> Have you tried playing it in mplayer and running -vf cropdetect? Or  
> just run
> crop=720:560 before scaling it.  You lose a little bit of video but  
> it might
> remove the green line.

in my first mail i wrote:

"
In the previous thread Carl Eugen Hoyos suggested this:

"Do you see them when you try:
mplayer capture.dv -vf yadif
mplayer capture.dv -vf yadif,scale=-10:-1
mplayer capture.dv -vf scale=-10:-1,yadif
...
"

I tried this all out and using mplayer the green noise isn't there
but all mencoder lines results with green noise, so it seems to be a  
problem
with mencoder?

I also tried encoding my MPG File with megui (x264) using an avisynth  
script including
yadif, the result has no green noise.
"

>
>
> On Fri, Jul 25, 2008 at 12:25 PM, Tobias Brockamp <tobiasbrockamp at gmx.de 
> >
> wrote:
>
>>
>> Am 25.07.2008 um 18:33 schrieb Brian Penick:
>>
>>> It might be possible that the auto detection for field-dominace is
>>> mismatching your fields try setting it to 0 and see what happens.
>>
>>> The  other
>>> thing might be that the chroma sampling from your video camera might
>>> lend
>>> itself to not resizing well with the RGB conversion that scale
>>> performs.
>>> Try leaving out scale and keeping the 720:576 ratio.
>>
>> same problem with "-field-dominance 0 -vf  
>> yadif,scale=768:576,harddup"
>> and also with only "-field-dominance 0 -vf yadif"
>>
>>>
>>>
>>> On Fri, Jul 25, 2008 at 7:13 AM, Tobias Brockamp <tobiasbrockamp at gmx.de
>>>>
>>> wrote:
>>>
>>>>
>>>> Am 25.07.2008 um 13:47 schrieb RC:
>>>>
>>>>> On Fri, 25 Jul 2008 12:30:32 +0200
>>>>> Tobias Brockamp <tobiasbrockamp at gmx.de> wrote:
>>>>>
>>>>>> i posted my mencoder command line and there it says:
>>>>>>
>>>>>> "-vf yadif,scale=768:576,harddup"
>>>>>
>>>>> Scaling after yadif doesn't change what dimentions yadif is  
>>>>> seeing.
>>>>>
>>>>>> and also the input files (704x576 and 720x576)
>>>>>
>>>>> Oh well, that was the only guess I could make based on the little
>>>>> information provided.  You could always provide a sample, as the
>>>>> previous poster didn't.
>>>>
>>>> i posted a link to my thread in the doom9 forum, there is a
>>>> screenshot
>>>>
>>>> http://forum.doom9.org/showthread.php?t=139703
>>>>
>>>> and i just have uploaded the input .mpg and the resulting avi file:
>>>>
>>>> http://rapidshare.de/files/40078452/yadif.zip.html
>>>>
>>>>
>>>>>
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>>>>
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