storing graphics in video metadata

[Razorholt]

Hello everyone -

Say that I'm reviewing a video and that I want to leave a note on a specific frame - such as a manual text in using a touchscreen or simply the mouse. I wonder if it's possible to store the new graphical element into the metadata table of that video.

Any idea?


Cheers,
- Dan

[Adub]

I highly doubt it to be possible, as most video metadata that I know only has support for entries such as resolution and frame rate. I think that the only way you could leave a "note" is by reencoding that note into the video stream.

[Razorholt]

Can't metadata contain images? If not then I guess I'll have to store the graphic somewhere else...

[LoRd_MuldeR]

Well, the MP4 container for example, explicitly supports JPEG and PNG as image formats.

It's not meta data, but content. And I don't know how exactly you can access images stored in a MP4 files. It depends on the player/splitter, I guess...

[JohnnyMalaria]

If your videos are in AVI files then there is no reason why not. In addition to audio and video streams, AVIs can contain text streams. Each frame of video can have its own matching frame of text information. IIRC, such texts stream are commonly used for closed captions. I'm pretty sure there's software out there to let you review a video frame-by-frame and insert text to the text stream.

[Razorholt]

Thanks guys for your replies. I will work on it and see whether I'm going somewhere.

- Dan