Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Currently, I have Avisynth file that output YUY2 Color space, and I want to encode it in High 4:2:2 Profile H.264.

Since my Avisynth filter isn't available in 64-bit yet, I have to use 32-bit Avisynth. I can encode it perfectly with 32-bit x264. But the 32-bit version is slower. If I use 64-bit x264, the encoder cannot load 32-bit Avisynth, and I have to pipe in.

If I am encoding in standard HiP/Hi10P profile, I can use avs2yuv, which generate YV12 raw to pipe into x264. But I cannot find any program which can pipe YUY2 colorspace (or i422 color space)

Question: Is there a way to use 64-bit x264 with 32-bit Avisynth and 4:2:2 output? Standard avs2yuv doesn't support 4:2:2, and 64-bit x264 cannot load 32-bit Avisynth directly.

PS. I usually downscale 1080p > 720p so the additional colour information is preserved.

PS2. I know I can playback High 4:2:2 file. My LAV Video Decoder & madVR can play it beautifully.

share|improve this question
What is your question? – AndrejaKo Dec 11 '11 at 13:19
Sorry, should be clear now. – innocenat Dec 12 '11 at 4:04

Try avs4x26x v0.10.0 or newer to pipe your AviSynth output.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.