[FFmpeg-devel] lavfi state of affairs

[Vitor Sessak]

Michael Niedermayer wrote:
> On Wed, May 06, 2009 at 10:31:54PM +0200, Vitor Sessak wrote:
>> Michael Niedermayer wrote:
>>> On Wed, May 06, 2009 at 08:46:58PM +0200, Vitor Sessak wrote:
>>>> Michael Niedermayer wrote:
>>>>> On Sun, Feb 08, 2009 at 07:10:22PM +0100, Vitor Sessak wrote:
>>>>>> Michael Niedermayer wrote:
>>>>>>> On Sun, Feb 08, 2009 at 01:39:02PM +0100, Vitor Sessak wrote:
>>>>> [...]
>>>>>>> could you please use unambigous command lines that do not depend on
>>>>>>> automatcally inserted scale filters!
>>>>>> ffmpeg -i in.avi -vfilters "format=rgb32, scale=256:256,format=rgb32, 
>>>>>> fifo,slicify=32, format=yuv410p, fifo" out.avi
>>>>> [...]
>>>>>> [format @ 0x88b9170]auto-inserting filter 'scale'
>>>>>> [format @ 0x88be990]auto-inserting filter 'scale'
>>>>>> [fifo @ 0x88ef990]auto-inserting filter 'scale'
>>>> It do not _depends_ on auto-inserted filters, but I understand what you 
>>>> mean:
>>> good so lets restart the questions
>>> 1. does this problem depend on the used scaler / bitexact / accurate
>>> 2. does it also happen when actual scaling is used?
>>> 3. full output please (highest verbosity and all the crap that sws can
>>>    print)
>>> and i know the awnsers to 1 & 2 where yes but there where 4 scalers,
>> Indeed I either missed something or it was among one of Cedric's bug fixes. 
>> For this example, either adding "bitexact" or doing scaling solves the 
>> problem. For example:
>>
>> ffmpeg_g -an -i /tmp/levis.avi -vfilters 
>> "slicify=32,scale=152:116:sws_flags=bilinear+bitexact" -pix_fmt yuv420p 
>> -vcodec rawvideo -y /tmp/out.avi
>>
>> works fine. About the full output, the only additional line is
>>
>> [swscaler @ 0x8a1d330]using unscaled yuv410p -> yuv420p special converter
> 
> good, so next figure out in what case that is printed
> hint: its yvu9toyv12Wrapper()
> the function is just a few lines, the bug is obvious -> earn some karma
> points fixing it

You mean as attached?

-Vitor
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