output format

[Selur]

Can I incorporate such script in HYbrid suppressing default output?
Where I have to put it?

No, you can't replace the default output with some random call.

Hybrid does have options which allow to call custom calls after a job or a queue finished, but those would probably require you to know the output name beforehand.
So if you knew each of your jobs would create 'E:\output.avi' you could:
Set "Jobs->Misc->On job finished" to "call external" and set "Jobs->Misc->On job finished->call external->at job finished external call" to

"c:\Program Files\Hybrid\64bit\ffmpeg.exe" -i  "E:\output.avi" -f image2 -vcodec png "E:\Output\output_%06d.png"

alternatively you could call a batch file or a another program to do whatever you want.

Cu Selur