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video preview screen black

Community Beginner ,
Apr 13, 2020

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I just rendered a small part of my edit on after effects and I converted it to .mp4 with handbrake and I went back to the edit on after effects, I could play it but the preview screen was black but I could still see text and overlays, i could still hear the audio as well. My eye icon is not disabled and my correct comp is chosen and its not zoomed in. I've been struggling with after effects recently with crashing and freezing but this is just really annoying.

Screen Shot 2020-04-13 at 7.38.40 pm.png

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video preview screen black

Community Beginner ,
Apr 13, 2020

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I just rendered a small part of my edit on after effects and I converted it to .mp4 with handbrake and I went back to the edit on after effects, I could play it but the preview screen was black but I could still see text and overlays, i could still hear the audio as well. My eye icon is not disabled and my correct comp is chosen and its not zoomed in. I've been struggling with after effects recently with crashing and freezing but this is just really annoying.

Screen Shot 2020-04-13 at 7.38.40 pm.png

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Error or problem, Preview

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60

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Community Beginner ,
Apr 13, 2020

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I have a Mac mid-2012 60GB

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Community Beginner ,
Apr 13, 2020

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another thing i have just realised, i just closed it and re opened it and now the audio thing is not there and the video does have audio

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Adobe Community Professional ,
Apr 13, 2020

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Well it looks like you are using After Effects to edit a movie that is almost 40 seconds long. That may be your first mistake. Then you said you converted a render of one of the comp - don't know which one from the screenshot, to an MP4 using Handbrake. Why would you do that? MP4's are highly compressed, introduce both compression artifacts and color artifacts, and they do not support Alpha Channels. It looks like your composition is full of transparency. I am assuming that the anidala.mp4 that is not selected in the comp panel is the problem file. Is the MP4 the entire nearly 40-second comp in your screenshot? That comp's frame rate and the MP4's frame rate match, but most of the other comps in the project panel are different and the comp at the top is completely nonstandard.  The selected comp in the timeline also shows that it has transparency, if that is important, any MP4 rendered from that comp is going to have a black background.

 

Please explain exactly what you are trying to do. If you need to render a digital intermediate to use as a source for more effects or for edit then you should choose a visually lossless, frame-based format designed for use in a standard production workflow. MP4's are for distribution to the public.

 

 

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