I'm trying to export a composition from Adobe After Effects. My Comp is 1280x720, and ideally I'd export with an mp4 container, and h264 video codec. Problem is, After Effects is giving me a PAR error, telling me the video will be resized "to meet format contraints".

Error Message:

Video will be resized from 1280x720(1.00PAR) to 176x120(1.21PAR) to meet format constraints.

Anyone know of a fix to this? Looks like my encoder is MainConcept MP4 Video. I'm using CS6. Thanks!

  • 1
    Could you elaborate on how you are choosing the container and video codec? An overview of the steps you're taking would help answer the question. Because when I choose the H264 output module in the After Effects renderer I get a .mp4 file with no PAR (Pixel Aspect Ratio) errors. Feb 11, 2013 at 0:20

2 Answers 2


In AE's "output module settings", with the format set to h.264, click "format options". Under the "video" tab, make sure "Level" is set to 5.1.

Here is a wikipedia entry which contains a table on h.264 level dimension constraints.

  • it works! thank you
    – user4894
    Oct 25, 2013 at 8:04
  • This most likely won't get seen, Being a little late. About 2 years late. But thanks so much Jason, I've never had this issue before and resolving it was just completely unknown to me. I don't know why it happened as I was rendering videos completely fine the day before, Thanks again.
    – user10899
    May 20, 2015 at 19:55
  • Very very useful Information. Successful method. Thanks
    – user12328
    Dec 18, 2015 at 13:05

It sounds like you are using a trial version of an encoder that imposes limitations on the size it will export based on the severe down-scaling that it is imposing.

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