Post in collaboration with www.latinofilmmaker.net
All video consists of 3 channels red, green and blue i.e. RGB, there is one more called alpha that determines transparency. This alpha channel will allow you to use your graphics or animations more creatively, being able to reuse elements that you commonly use in your videos whether logos, lower thirds or watermarks, this is what we know as exporting a transparent video.
IMPORTANT –You must have Quicktime installed
If you don’t have the Quicktime option is because you need to install the codecs, here’s the link to download Quicktime for windows (It comes by default on macOS but not on Windows). Without these codecs you will not be able to export in alpha channel in any program.
- 1 How to export alpha channel in after effects?
- 2 How to export alpha channel in Premiere Pro?
- 3 How to export alpha channel in Davinci Resolve?
- 4 How to export alpha channel in Vegas pro?
How to export alpha channel in after effects?
First check that your composition is transparent by clicking on the transparency grid below your main composition.
1. Add to processing queue
To render an alpha channel video in After effects, you must first add it to the render queue. Therefore, under Composition, click Add to render queue.
2. Open render settings
Now click on where it says “Lossless” to set rendering to alpha
3. Configure output and render
Finally, you just need to select the Quicktime format and choose the RG+Alpha channel. It would only have to click OK and render. At the end you will have a file in .MOV format
This way you can export video with alpha channel (transparent) in after effects
How to export alpha channel in Premiere Pro?
Having our animation ready without any background underneath, only the layers we need, it would be missing to export so…
1. Mark the entry and exit points
We mark the render region that we want to render, we can do it by pressing the shortcuts “I” for the entry point and “O” for the exit point.
2. Open Export Settings
Click File > Export > Media… or press Quick Access CTRL+M
3. Configure the video format
And finally what will make the video have a transparent background is to change the Quicktime format and in default select GoPro Cineform RGB 12-bit with Alpha (The other option of maximum bit depth is only used when we have a gradation color). The other options such as resolution, frame rate etc… are at your choice
FACT: This is the same way it is exported in alpha channel within Adobe Media Encoder, as you will find the same export settings panel as Premiere Pro.
And ready, we click on export. We would already have our transparent background video from Premiere Pro to reuse it in other projects
How to export alpha channel in Davinci Resolve?
NOTE: Unlike the previous programs, when creating a transparent background clip in Davinci solve you could only use this same program, if you import it in another programyou will not be able to see the alpha channel.
1. Select the video region and go to DELIVERY
We start by selecting the video or fragment we want to export and go to the Delivery tab to configure render options within Davinci Resolve
2. Enable alpha channel in render options
Here is the important part, in the render options select the option Individual Clips, in QuickTime format, in Codec DNxHR and under resolution select the Export Alpha box.
3. Render the video
In the previous step we add it to the processing queue by clicking on “Add to Render Queue”, now only missing go to the upper right pane and click on Render All
How to export alpha channel in Vegas pro?
Many know it still as Sony Vegas, here is a bit more complicated to set up, but we’ll show you all the steps to make it easy to follow.
1. Enable Quicktime in sony vegas
The new versions of Sony vegas bring the quicktime plugin disabled so we must manually activate it by clicking Settings > Preferences
then go to the deprecated features tab and check the option “Enable Quicktime plugin” and accept.
2. Select the clip and render as
With the cursor we select the part of the video we want to render and then click on File > Render as
3. Customize the template for rendering in alpha channel
Select Quicktime format, 3Mbps Video template and then click Customize Template
Here it is important to uncheck the option “Keyframe each (frames)” and in video format select Animation the other parameters adjust them to your convenience, in my case it will be a 1080p video at 24fps. Click OK and then Render.
The video was already with transparent background however if we import it inside Vegas pro we can still see a black background behind it, this is because the alpha channel is not yet activated. All programs bring it active by default but in Sony vegas you have to do it manually
4. Enable alpha channel in sony vegas
Right click on the clip > properties, You go to the media taband where it says Alpha channel that by default is in None, we change it to Previously Multipliedand done. Accept
This corrects this problem, now you can use the alpha channel videos inside Sony vegas