Not sure if I am correct posting my question here and I will of course delete this question if appropriate.
I have a C# desktop app using FFmpeg.
I have a web service using FFmpeg.
I sell both products.
I want to know — can I distribute my desktop app with FFmpeg without paying a fee to FFmpeg people and without releasing my source code?
I also want to know whether I can use FFmpeg on my server for users to convert images to a video file to be emailed them. This service is also a payable product.
I have read the links to the FFmpeg licensing info and I read many questions here on these boards.
The closet I have got to an answer is that I can use it on my web server because I am not distributing it to client PCs and I can use FFmpeg on my desktop app if I only use certain features of FFmpeg — whatever they are.
However, this is not definitive enough for me and I cannot afford a lawyer and you would think this question/dilemma would have been resolved somewhere by someone considered how popular FFmpeg is.