Outdated information in "Creating movies" page

[berarma]

This is to remind us that this page needs to be updated for Godot 4.5, before I forget about it.

My documentation writing skills aren't so good. I can write the basic information, but someone else would do a better job at writing the final documentation.

These are the changes that I know, mainly related to the addition of the OGV format. There might be others that I don't know of.

• The button to enable/disable Movie Maker mode now unfolds a dropdown menu with an option to enable/disable, and another one to go to the the settings.
• OGV output format has been added. It could be the recommended output format instead of AVI, IMO.
• The MJPEG Quality setting has been renamed to Video Quality, and applies to both AVI and OGV output.

The specific settings for OGV are:

• Audio Quality (-0.1 to 1.0), default 0.5.
• Encoding speed (Fastest, Fast, Slow, Slowest), default is Fastest. Applies only to video.
• Keyframe interval (0-...), default is 64.

Some information bits:

• OGV is Ogg Theora/Vorbis, so both modules need to be enabled (it's the default).
• The file extension is .ogv.
• Compression is always better than AVI at the same video quality setting.
• Encoding speed is roughly the same as AVI at default settings.
• Better compression with similar quality can be achieved by changing the encoding speed setting.
• Image quality is a bit higher than AVI for cartoon-like visuals.
• It has no intrinsic file size limit.
• Converting to other formats is similar to AVI.

More information in the MovieWriter page.