command line for converting AND watermarking from any format

[2diabolos.com]

Hello everybody.

For my website, I need to have a relatively automated process to generate :
1) a MP4 vidéo with a watermark on the bottom-right. My logo has a transparent background.
2) the same in FLV
3) an extracted JPEG (or PNG, I don't care) image
at input, I have small vidéos (less than 20 sec) from my visitors, so this could be any format/codec....

My dream is to have a command line programm which produces the 3 things at once.
I have currently about 200 videos, I don't want to make 200 times "save extracted image as", and type the name for each JPEG file.

I know that SUPER (and other FFMPEG GUI) allows to open any video format and convert to another one.
I know that certain GUI allows watermarking, even if most of them are buggy on that feature.
I already dowloaded AviSynth, but I never seen any script which could open "any format".

Feel free to answer partially the quesiton.
For example, if you know how to open "any format" with avisynth, that already 50% the answer.

Perhaps this is possible directly with ffmpeg. even if I did not see any "watermarking". (but there is avisynth things...)

as my files are small, a temporary file is no problem.

Thanks in advance.

[midders]

Use ffdshow with AVISynth to enable the directshowsource("movie.???") command which will play just about anything. You can also use AVISynth to overlay your logo. For the conversion use whatever command line tools you can find that are appropriate to the output that you want.

Windows batch scripting is an arcane but powerful resource for working with multiple files; check out my batch script (link in sig) for some pointers, if you are new to batch language.

Slainte

midders