UE 5.2 can't read mp4 media that UE 5.1 reads ok.

[icierva]

Hi

I’m trying to migrate a project from 5.1 to 5.2. Everything is working fine except mp4 media, that’s core to the project.

I’m using Electra player.

I get these two errors:

MP4 parser: Invalid filler data size of 0x68646c6a to read at offset 0x50f2 in box 0x00000000 (size 0x68646c72, offset 0x50ea, dataoffset 0x50f2)

Error: error=8 in MP4 playlist reader: code 1, “Failed to parse mp4 “file://R:/ […] .mp4” with error 8”

And this happens with every single mp4 file I’ve tried with. Anyone else having this problem?

[icierva]

I’ve found mp4 files generated by HandBrake work fine in 5.2.

All my media is from Blackmagic’s Davinci Resolve Studio.

Checking both Handbrake and Davinci files with MediaInfo

The only difference is that Quicktime TC stream that Resolve includes in the mp4 file. I haven’t found any export option in Resolve to get rid of that timecode stream.

I have an easy workaround: Re-export from Davinci with high quality (as now those files will be intermediates) and then re-encode them all to desired bitrate with HandBrake. Not too bad, it can be done on batch.

But I insist UE 5.1 can read the Davinci files with no errors. It seems 5.2 is more picky…

[Animacio.org]

Same issue on my end coming out of Davinci Resolve. Yes, agree differences are the QT TC and also format profile for Baseline. Resolve output is L5.1 vs HandBreak L3 or 3.1. Let’s hope someone can shed light on this issue.

[icierva]

I can export Main@L4.2 profiles from Resolve (see it in the MediaInfo captures above) with both the native or the AMD encoders.

With the AMD encoder I can also force it to be CABAC (as the files from handbrake are)

But can’t find a setting to avoid the QuickTime TC stream.

[lgulyas]

I was having the same problem, with one minor difference. After converting the project to 5.2, the mp4 files would play properly, but if I made any changes and saved the project, they no longer played. Transcoding with Handbrake resolved the issue.

[ABritesArt]

This helped fix the issue. Thank you so much! Didn’t know Epic had a war with Davinci resolve.