Desktop sharing frame rate: Allow custom framerate

As far as I know you now have a drop-down list with these options (Windows / macOS): #514 (closed)

(Source: https://review.jami.net/plugins/gitiles/jami-daemon/+/ad7284da594897218c815225884b0298779507e4/src/media/video/osxvideo/video_device_impl.mm )

• FrameRate(5)
• FrameRate(10)
• FrameRate(15)
• FrameRate(20)
• FrameRate(25)
• FrameRate(30)
• FrameRate(60)
• FrameRate(120)
• FrameRate(144)

Can you please add the option "set custom frame rate" [Enter a number]?

So you can select a custom frame rate for the following options:

• Share screen
• Share screen area
• Share window
• Chrome tab (like Jitsi Meet; not possible now using Jami)

regarding multistream (for the next versions of Jami):

Answering in audio only to a video call, and sharing the screen while sharing the camera in a video call are features generally requested by users

It would be great if you were able to have 60 fps screen sharing and at the same time 30 fps window sharing.

mentioned in issue #642

@agsantos Since you also created this new feature: #514 (closed)

Would it be possible to allow the following option:

add the option "set custom frame rate" [Enter a number]