Reading and Writing Channel Metadata

[rholm]

Hi and thanks again for the great software

I have a few different situation where I would like to read some metadata from a file.

Example 1:
I receive a high res video with multiple audio channels, and I want to create a low res proxy. I do however need to know which audio channel(s) that contain the mixed audio so I don't end up with a proxy with only surround channels as audio

Example 2:
I receive a high res video with multiple audio channels and I would like to export all audio channels separately. I have several workflows for this now depending on the channel order so the original has to be manually checked, but if I could read the channel position I could use one workflow for all videos and just name the output to the channel layout.

Example 3:
I have several audio tracks and would like to mux them together which I got to work thanks to your previous input here on the forum (thanks). I would however like to be able to add the channel position in the metadata?

Robert

[admin]

Dealing with audio channels is not an easy task beacuse of all the different possible combinations out there. If you use the "A/V Media"-decoder FFAStrans will lay out all the 32 first channels found in an orderly fashion in ONE stream containing the 32 channels. Missing audio is added so the number will always be 32. So, if you know where your audio is within your media, the decoder will make it easy for you cause the configuration will always be consistant. Please take it from there and see what you can come up with, because FFAStrans does not currently have ready solution for your problems.

-steinar