QuickTime ChannelLayout Tags - using PyExifTool

[speedyrazor]

Hi, I am looking for a way to write / updae the header info in Quicktime Prores files, for example, I want to update 'QuickTime ChannelLayout Tags', but looking in the Exiftool docs, it says 'writable = no'. Just wanted to double check I am reading this correctly, any way to do this please?

Kind regards.

[StarGeek]

If the tag has a "no" in the writable column, then exiftool cannot write it.

You'll probably have to look at ffmpeg.  This StackExchange question seems similiar to yours.