Comment 0 for bug 1046889

Some enhancements to the export window are needed. This bug report consolidates a number of others into one.

1. Don't allow invalid format/codec combinations. In the advanced tab, users can select any format/codec combination. If they are an invalid combination, it results in a crash in ffmpeg. Hanspb has created a sheet of valid combinations. See http://openshotusers.com/forum/viewtopic.php?f=27&t=1150#p5870

2. Ensure formats get exported with the commonly used extensions, i.e.mkv instead of matroska. See the sheet above for format/extension details.

3. Provide a way to export only part of the timeline, whether it is by markers on the timeline or a position counter on the export window.

4. Include the ability to save custom export settings as a new preset.

5. For advanced users, allow the use of ffmpeg encoding options directly.

There is a thread in the forum including some good mockups.

http://openshotusers.com/forum/viewtopic.php?f=27&t=1150