Added option to export with alpha channel

[jonata]

This add the option to export with alpha channel, may solve #559

[Zulko]

There is a syntax error in your commit. Did you try it on your machine ?

[jonata]

Sorry about this.

[Zulko]

thanks for the pull request. Can you replace "withmask" by "with_mask" ?

Also, do you have by chance some (non-copyrighted) bit of masked video (just a few seconds) that we could try this on (and write a test for the test suite) ?

Ideally the story of a test would be (1) load the video in moviepy with VideoFileClip, (2) write the video to another file, with the mask, (3) load the video from the new file and check that it still has a mask.

[coveralls]

Coverage remained the same at 57.202% when pulling 1aa1f0b on jonata:master into f444f8c on Zulko:master.

[coveralls]

Coverage remained the same at 57.202% when pulling 1aa1f0b on jonata:master into f444f8c on Zulko:master.

[coveralls]

Coverage remained the same at 57.202% when pulling 1aa1f0b on jonata:master into f444f8c on Zulko:master.

[coveralls]

Coverage decreased (-0.2%) to 56.962% when pulling ebafb93 on jonata:master into f444f8c on Zulko:master.

[coveralls]

Coverage remained the same at 57.202% when pulling ebafb93 on jonata:master into f444f8c on Zulko:master.

[coveralls]

Coverage remained the same at 65.005% when pulling 68c4928 on jonata:master into f670d1a on Zulko:master.

[jonata]

moviepy_video_alpha_export.zip

[darknoon]

Hey @jonata , thanks for your PR, using it locally I was able to export a clip with 4444 for integrating machine learning in python into a post workflow. It would be great to get this merged into master… need someone to clean it up?

[jonata]

Hi @darknoon , sorry my lack of experience, what I am supposed to do now?

[tburrows13]

Linking #1122.

[mondeja]

This has been added in #1237.