Media Encoder doesn't let me incorporate metadata inside the video output file

[ppsonar]

Why Media Encoder doesn't let me incorporate metadata inside the video output file (that option is not selectable)? 
Please see attached screenshot

[Joost van der Hoeven · Accepted solution]

Not all metadata can be included in .mp4 files. that is why the .xmp sidecar file is created. .mov and .mxf containers do support all metadata fields.

[ECS_1]

hi - I am having the same problem. However, unless something has changed, I don't think your answer is correct. Keyword metadata definitely can be embedded in mp4 files, because for many years I had been doing so using Adobe CS4 and have thousands of mp4 files with embedded keywords to prove it.

Now I have upgraded to the Cloud, and this has become the latest reason why I wish I had not done so. I've just realised that 6 months' worth of metadata I've added to exported files has been lost as the default option was to create a "sidecar" file but no such files appear to have been created. 

What has changed?

Thanks

[ECS_1]

This is how CS4 does it.

[ECS_1]

As can be seen from the above CS4 screen shot, you can select "file info" and then the XMP keyword metadata (which is all the info I need) can be included.

[Joost van der Hoeven]

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More info bug report: https://community.adobe.com/t5/adobe-media-encoder/ct-p/ct-media-encoder?page=1&sort=latest_replies&...
More info feature request: https://community.adobe.com/t5/adobe-media-encoder/ct-p/ct-media-encoder?page=1&sort=latest_replies&...