Expose apiPreference and int fourcc in VideoWriter Constructor

[jhhurwitz]

Hello,

It seems currently the only way to create a VideoWriter is through the C.VideoWriter_Open function.

It would be great to expose a function that allows a user to specify the apiPreference (in my case to force CAP_GSTREAMER) and the fourcc as an int (to allow for fourcc=0) when constructing the VideoWriter.

I was able to use such a function I created locally to make gstreamer video writing work consistently with gocv.

Happy to open a PR if that makes sense.

Thanks for the awesome library!

[deadprogram]

Hi @jhhurwitz that sounds like a good enhancement. Right now I think you can only do this for input by using the arcane GStreamer syntax as a string passed to the camera.

We would be really happy to get a PR that added this!

[nibbleshift]

Is there any status on this? I'd like this functionality. If you need a PR, i could look into integrating this functionality.

[jhhurwitz]

@nibbleshift, unfortunately, some things changed recently with me, and I am unable to work on this right now. Would definitely be happy to see a PR, though.

[nibbleshift]

Thanks for the update. I will look into getting this done.

…

On Fri, Jul 24, 2020 at 1:20 PM jhhurwitz ***@***.***> wrote: @nibbleshift <https://github.com/nibbleshift>, unfortunately, some things changed recently with me, and I am unable to work on this right now. Would definitely be happy to see a PR, though. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#690 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AJDHPWWWWS3CPKU4XVYIISDR5G7HDANCNFSM4NTLLOIA> .

[nibbleshift]

hi @deadprogram, i submitted PR #718

If there are any changes you would like in the PR, let me know and I'll make them.

[deadprogram]

I just merged #739 which appears to have done the same sort of thing as #718

@nibbleshift thank you anyhow for the contribution it is appreciated!

Marking this issue for next release.

[deadprogram]

This has now been released so closing. Thanks!