<![CDATA[creating an alpha mask]]>Hello, when i convert an mp4 movie to hap alpha using Shutter Encoder or AVF Batch Converter i cannot see the alpha mask in Isadora.

I can see the alpha mask when i test with a downloaded sample movie (that has an alpha mask)

I'm assuming i first need to use a video editing app (like premier or after effects) to add the alpha mask to the original mp4 movie and then export it out, right?

If so, can anyone recommend a free or simple video editing app i could use for this purpose?

Many thanks, Mr J

]]>https://community.troikatronix.com/topic/7500/creating-an-alpha-maskRSS for NodeThu, 13 Aug 2026 09:21:41 GMTSun, 15 Aug 2021 19:10:04 GMT60<![CDATA[Reply to creating an alpha mask on Mon, 16 Aug 2021 13:56:54 GMT]]>@mr_j said:

add the alpha mask to the original mp4 movie and then export it out, right?

 I would not use mp4 for this purpose. I recommend ProRes 4444. This will give you the cleanest image and alpha. You can then convert this quickly using Shutter encoder. (this is very much my personal process)

Resolve is a great free editor to use.

]]>https://community.troikatronix.com/post/46653https://community.troikatronix.com/post/46653Mon, 16 Aug 2021 13:56:54 GMT<![CDATA[Reply to creating an alpha mask on Mon, 16 Aug 2021 00:14:47 GMT]]>Could you use one of the add alpha mask type actors in Isadora?

Cheers,

Hugh

]]>https://community.troikatronix.com/post/46650https://community.troikatronix.com/post/46650Mon, 16 Aug 2021 00:14:47 GMT<![CDATA[Reply to creating an alpha mask on Sun, 15 Aug 2021 22:49:11 GMT]]>@mr_j Hi there, are you familiar with Davinci Resolve? it's a free  editing software 

]]>https://community.troikatronix.com/post/46649https://community.troikatronix.com/post/46649Sun, 15 Aug 2021 22:49:11 GMT