• Adobe Premiere Pro

  Premiere Preview Lags Only When Video File Has Alpha Channel

  Posted by Nick Heady on February 21, 2015 at 10:15 pm

  I’ve exported a Quicktime PNG file from After Effects with alpha channel intact. It’s a couple minutes long and the file is 700mb. Nothing too big for Premiere.

  When I import into Premiere, the preview playback lags a lot. I brought it into Premiere so I could synch up some narration and music, which I cannot do without proper playback.

  At first I though it was the large file. However, when I export the same video from After Effects WITHOUT an alpha channel, it plays back WITHOUT lag in Premiere!

  Any idea what could be causing this?

  Nick Heady replied 11 years, 7 months ago 1 Member · 0 Replies
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