Silence ffprobe debug output on stderr.

[Querschlag]

Description

FFprobe outputs debug information to stderr by default. This clutters the application log and does not provide any benefit. I added flags to hide the standard banner and set the log level to warning, so only relevant info is sent to stderr.

Checklist

• [ ] Tests covering the new functionality have been added
• [ ] Code builds clean without any errors or warnings
• [ ] Documentation has been updated
• [ ] Changes have been added to the CHANGELOG.md
• [ ] You added yourself to the CONTRIBUTORS.md

[escaped]

amazing. Thanks a lot :)