Someone can explain two pass encoding and tell me why I would use it?

I'm a bit new to AE, been used only for about 1.4 years, but I realized about 200 videos (effects short clips).


I do not understand some things, and one of them is the two pass encoding option.

Clearly, there is a reason for this, but I did a search and I don't find much explain why I would use it.

Can someone help a relative beginner?

Two-pass encoding return forward, then backward. Codecs that use several rendering pass deliver video as a series of images complete with all the mixed data with the frames which contain only the best estimate including pixels change between full frames. The first pass a pretty good guess the partial images and then partial frames are compared with the original, once more control on both sides partial images to see if the best calculations can be done. This improves the accuracy of the calculations, reduces the data rate, smooth color and movement of objects and increases sharpness perceived in the stream. Quality is always better. Reading is easier on the CPU, because data are packaged in a more effective package for decoding. Made multiple takes longer to render the efficiency gains are in playback, the data rate and the perception perception of high quality video. I put rendering single-pass to a client.

I hope that explanation helps. It's like any other system to do mathematical projections. The more times and means more you look the more accurate data of the result.

Tags: After Effects

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