-merge-output-format and -f question

[astering]

Hello, I find some weird bugs, if I let the preset "format" empty, the content of "container" will be set as argument of "-f".

For example, format = best, container = mkv, the it will be: -f best -merge-output-format mkv,

but if format is empty, container = mkv, then the argument is -f mkv.

I want to have mkv as output,merge some subtitles, but the stream maybe vp9 or h264, some videos don't have mkv, and will cause unexpected behavior.

[database64128]

When I first wrote this, I made the assumption based on my understanding of the documentation that specifying --merge-output-format alone was equivalent to specifying --format with the same argument. Looks like I was wrong.

Fixing this would require a breaking change to the preset mechanism, which might break some existing user-defined presets. But it's probably the right thing to do. For now, you can leave both format and container empty, and specify --merge-output-format, mkv as extra arguments.

[astering]

For now, you can leave both format and container empty, and specify --merge-output-format, mkv as extra arguments.

Yeh, that's what I set now. Thanks to custom parameters, setting any suitable parameters is always feasible.