mp4 videos render incomplete WITHOUT ANY WARNING

[UserBCBZ]

When you export a video to some mp4 format, what Premiere does is that it renders first video and audio to 2 separate files and then it combines them to mp4, that's why it's stuck on 100% for a while when rendering.

The problem is that when creating the mp4 there's not enough space on the disk, the mp4 file will be created but incomplete, it can be played normally, it will show the length video is supposed to have but if you try to play the video at the end, it won't play. Problem is that Premiere doesn't let you know in any way that there's not enough space for creating the mp4 because while creating it separate audio and video files need to be also on the disk. Premiere can warn you about low disk space but it doesn't work for mp4 files properly.

For example if Premiere shows estimate file size 3.5GB and there is 3GB of space on the disk then it will warn you. If you have 4.4GB of free space then it won't warn you and the file will be incomplete. Realistically it's good to have 3x or 4x the free space than Premiere shows to be sure.

How to replicate this issue:

render mp4 files which has file estimate which is for example half of free disk space

[R Neil Haugen]

As so often noted by the other experienced users here, you  must have between 3 and 5 times the expected final size of a file of free disk space in order to get a complete export.

That's just reality. You as the user have to take care of that.

[UserBCBZ]

There's no reason why Premiere can't just tell me when that happens. There's no reason why low disk function can't work with multiplied number when rendering to mp4. That's an issue caused by lazy developers. Reality is if someone cared it could be fixed within a few hours.

[R Neil Haugen]

Look, whatever you feel "reality" is is up to you.

I'm simply a practical person, and this issue is something any user can easily, totally avoid.

There are other things that need work that I'd personally devs spent time on. But we are all different. I've no problem whatever with your complaining about this or anything else. Please do, in fact ... the more that post, the better.

Just understand we are each an individual. None of us controls anyone else's "reality".

[Ann Bens]

You need adequate disk space to run a proper export.

Software does not always tell you are running low on diskspace, that is something you need to follow up on.