Is it possible to export a video file from After Effects with transparency?
I don't want to export to an image sequence.
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File > Add to Render Queue > Output mode > Format 'Quicktime' / Channels 'RGB + Alpha'
See if that works for you!
Apple ProRes 4444 / Apple ProRes 4444 XQ
From the Manual:
Apple ProRes 4444 and Apple ProRes 4444 XQ are ideal for the exchange of motion graphics media because they are virtually lossless. They are also the only Apple ProRes codecs that support alpha channels.
lossy high-definition video post-production codec engineered for multi-generation compositing with reduced storage and bandwidth requirements
The codec supports alpha channel information.
lossy UHDTV post-production codec engineered for multi-generation compositing with reduced storage and bandwidth requirements
Current implementations support image formatting for 10-bit 4:2:2 YUV, 12-bit 4:4:4 RGB and RGBA, and 12-bit CFA Bayer filter RAW compression
From the After Effects Manual:
When specifying the color depth for an output image, the plus sign (as in Millions Of Colors+) denotes an alpha channel. Similarly, choosing to output to 32 bits per pixel implies an output depth of 8 bits per channel for each of four channels: RGBA.
Yes, for the Quicktime output module, choose to output
RGB + Alpha using PNG or Animation codec.
In Media Encoder, choose Depth as
32 Bit after selecting the same codecs as above.