mp4 sample description errors are blocking tag edits

[zeveron3]

First off, exiftool is awesome, so thanks!

I've been having a little trouble with editing tags in google pixel videos:

exiftool -Rating=4 ~/Downloads/PXL_20220804_213452437.LS.mp4
 
Error: No data reference for sample description 0 for Track2- /home/user/Downloads/PXL_20220804_213452437.LS.mp4
    0 image files updated
    1 files weren't updated due to errors


System: Linux
exiftool -ver = 12.40

There are a bunch of "Sample Duration" and "Sample Time" tags that show up when you just dump all the tags, but I'm not sure if these are relevant.

I've attached a small video clip as an example if anyone wants to dig in deeper (and see my cute kid).

Thanks!

[StarGeek]

Possibly fixed in ver 12.41
* Patched to allow writing of MP4 videos which have other tracks with a missing sample description entry

I'm using 12.42 and it writes to you example file without a problem.

[zeveron3]

I can confirm, this is already fixed in the latest version.

Mmmm foot -- pro-tip: look at history and not just assume you're up to date using your linux software update manager. Thanks again for the awesome tool and your help StarGeek!

[mread]

I am using ExifTool 12.50 and have this same problem with two .mp4 files from a Pixel 6 Pro.  I have tweaked the dates and am writing the file from within a Perl script: $res= $exifTool->WriteInfo($fname,$newFileName);

The error message {my $msg = $exifTool->GetValue('Error');} is:
"No data reference for sample description 0 for Track1"

This on Cygwin64 on a Windows-10 system.

Could the bug have crept back in since version 12.42?

Link to the file in question: https://drive.google.com/file/d/1OS5fuNHjt9mdC2WyV5_Wq6ZyARWpyFza/view?usp=sharing

[Phil Harvey]

Writing this file works with ExifTool 12.50 from the command line:

Code Select Expand

> exiftool ~/Desktop/20221029_005338521.mp4 -o tmp -createdate=now
    1 image files created
Are you sure you are using 12.50 from within your script?  Can you reproduce this from the command line with the exiftool 12.50 app?  If so, what command exactly?

- Phil

[mread]

You are right.  Command line was 12.50 but script was still using older version because Install had failed.

After fixing the installation the script now works as expected.

THANKS!