Handler Vendor ID and Encoder in metadata of media file (audio /video)

[Haider881]

Hi,

In metadata of audio/ video there are some flags with the name of Handler Vendor ID and Encoder. I have few queries regarding these flags:
1) What does Handler Vendor ID represent? e.g In a file I found the tag value for handler Vendor ID as Apple. Is this tag value represent the device manufacturer name by which this recording was made or show the device from which it was uploaded to some social media platform?
2) Is handler Vendor ID value change with sharing the media file with some body on any social media platforms?
3) what is mean by Encoder flag? for a media file I found the tag value for Encoder as Lavf57.19.100. On which factors does this tag value depends. Is this depend on device manufacturer, model, software version or social media platforms to/ from which it has been uploaded/ downloaded?

Any help would be highly appreciated.



Haider.

[StarGeek]

I don't have an answer for most of this but when a video file is shared on most social media sites such as Facebook/Instagram, then all personally identifiable data is stripped.  I believe that the file is run through ffmpeg without including the -map_metadata option.

[Haider881]

thanks alot @StarGeek