Sound out of sync after compress

[stephenw30516810]

Dear all

I have managed to compress a 712mb MP4 to 145 mb H.264 after following a tutorial on you tube and making a cusom preset.  The results are not bad at all, excpet, the sound is now out of sync :-(.

I thought I would be clever and opened my shrunk video in pro, I was able to sync up the video but when I went to export I was back at my big video file again!!  

Can anyone offer any exaplanmation as to hjow I can sync this up or what I need to change in my preset to make the sound sync up in the first place  I have to stay within the adobe suite so cant wash this through any third party software. 

[stephenw30516810]

please forgive my awful typing

[Shivangi_Gupta]

Hi there,

We appreciate you writing in. Could you share a screenshot of the export settings that you're choosing?

We'll look into the issue.

Regards,

Shivangi

[Rick Gerard]

What tutorial are you following? That is as important to know as your settings. Unfortunately, most of the newer After Effects tutorials I have helped people figure out are presented by enthusiasts presenting a recipe they saw somewhere. Most of the workflows are less than ideal. Some of them only work with a specific set of source files. You have to vet your trainers. 

What format was the MP4? Most are H.264. Compressing a 712 Mb file to 145 Mb is an 80% reduction in file size, and I would expect something to break. We need details to help you out. 

[stephenw30516810]

Thanks for replying, I did some research and it seems the issue is when importing variable (progressive) frame rate video.  In the end I had to manualy sync the audio once I had compressed it then re author.  I got the settings from this link,

https://www.youtube.com/watch?v=L14T5oyMA_0

worked well and the output was acceptable quality for our needs. 

 My settings were output of 1280 x 720 matching source on everything else. Bitrate encoding VBR 2 pass with target bitrate 2 and max of 2.2.

I am a novice at all this so any advice would be appreciated. I use handbrake to fix a lot of issues but his video I could not as it had to stay inside the organisation equipment.