[FFmpeg-devel] lavfi state of affairs

Michael Niedermayer michaelni
Wed May 6 21:52:07 CEST 2009

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

and i know the awnsers to 1 & 2 where yes but there where 4 scalers, 
each of which could have introduced the problem and i dont know if
you managed to make all do scaling and run in exact/accurate/... mode

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Awnsering whenever a program halts or runs forever is
On a turing machine, in general impossible (turings halting problem).
On any real computer, always possible as a real computer has a finite number
of states N, and will either halt in less than N cycles or never halt.
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