Hi both, On Fri, Jul 14, 2017 at 2:32 PM, Andrey Goreev <[email protected]> wrote:
> I am pretty sure there was a large table with All the media types listed > here: https://developer.apple.com/library/content/ > documentation/QuickTime/QTFF/Metadata/Metadata.html That was the spec I mentioned. I can't find it there. > > I am not able to locate it from my phone right now though. > There is also one on exiftool webpage. Thanks, yes, that's really useful! http://owl.phy.queensu.ca/~phil/exiftool/TagNames/QuickTime.html On Fri, Jul 14, 2017 at 3:53 PM, Karen Norton <[email protected]> wrote: > Thanks for the speedy reply!! Is it just me or is getting info on writing > metadata tags proving to be a challenge? Yeah it seems so. I'm thinking of adding some info to the ffmpeg documentation when I have a chance. > I'm having a hard time finding > comprehensive metadata documentation by media and container type (ex: I > know mkv allows for custom tags but mp4 doesn't). I checked out that > webpage you sent Andrey but wasn't able to find all of the flags and their > parameters. I will look at it again. If there is a page listing everything > that would be great. > > You are correct Kieran... media_type is an integer. Thanks. I should have > thought to try that first although I wouldn't have thought to go to "10". > To be honest I would never have even guessed that it was an INT if I hadn't looked at the source code. My experience with using -metadata is that your usually pass a string. > Most likely just 0 and 1. Thanks for sending those github pages!! That gave > me what I needed for this flag. > > I came across this page (ttps://thediveo-e.blogspot. > ca/2016/06/adventures-in-ffmpeg-meta-data-writing.html) with a limited set > of flags which is what I've been going by but it doesn't have media_type. I > discovered this flag via a gui program I have that converts mkv to mp4 and > it has built in tagging. You can select "Movie", "Music", "TV Show" and a > few others. I assumed this was a string field but obviously they have the > selections mapped to integers as in "1" = Movie, etc. > > I guess the integer is nice as it can allow for a stricter adherence to a controlled vocabulary. But it adds an extra layer of complexity as that table of entries must be easily available. As Andrey wrote, exiftool has a good vocab here too for media_type/stik http://owl.phy.queensu.ca/~phil/exiftool/TagNames/QuickTime.html > Given metadata is the cornerstone by which we live our lives I'm surprised > I'm having such a hard time finding information. I just assumed there would > be a metadata bible out there for media. :-) I'm keeping my own document of > all the sites I find info on in hopes of piecing everything together. :-) > Can you send that on please? I work in a moving image archive so I am interested in metadata resources. Best, Kieran O'Leary _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
