[Libav-user] Is an avfilter applied before encoding/decoding or after that

[Robert Krüger]

On Nov 18, 2011, at 10:58 , Carl Eugen Hoyos wrote:

> Harry Ma <hooxer at ...> writes:
> 
>> I wonder when a avfilter is applied? is it applied before encoding/decoding or
>> after that?
> 
> I don't think a (video) filter could do anything useful if it is not applied
> after decoding and before encoding.
> 

Hmm, I've had one use case and that was to have something like the setpts filter when remuxing, which is helpful in some cases when conforming video and all I could come up with was to hack it into ffmpeg by adding a command line option but I don't know how many such use cases exist to decide whether it justifies a design change (just assuming it would probably require a design change).

Regards,

Robert