Problem with ffmpeg or the source?

[Andy Bircumshaw]

On 19/12/2010, at 6:02pm, Shevek wrote:

> On 19 December 2010 16:34, Andy Bircumshaw <andy at networkned.co.uk> wrote:
>> 
>> I'm confused.
>> 
>> Using the old version ffmpeg, don't you get good output irrespective of this change at the BBC?
>> 
> 
> yes - you do get good output but there is the warning from ffmpeg.
> 
> These are my findings:
> 
> HD encodes prior to 1st Dec are fine when transcoded by any version of ffmpeg
> 
> HD encodes post 1st Dec and transcoded using r25658 or earlier give
> the brainfart message
> 
> HD encodes post 1st Dec and transcoded using r25669 or later give a bad output

Thanks for the clarification, and for spending so much time on this. 

Seems to me like the brainfart message is a good thing - the message is to say "I recognise this is a problem" and then it's proceeding to deal with it.

Seems to me like r25669 and later aren't recognising the "brainfart cropping" and therefore aren't dealing with it, and therefore that's why you're seeing the artefacts.

We can't do anything about the BBC's new cropping, but we can take this upstream to ffmpeg.

Are you ok to do that?

aB.