How to ignore non-zero exit status?

[Boscop]

1. ffmpeg -list_devices true -f dshow -i dummy always returns 1, even though it prints the desired output: https://trac.ffmpeg.org/wiki/DirectShow

I'm calling duct like this:

let output = cmd!("ffmpeg", "-list_devices", "true", "-f", "dshow", "-i", "dummy")
    .stdout_stderr_swap() // temp workaround (see below)
    .read()?;

duct fails with:

Error:
    command ["ffmpeg", "-list_devices", "true", "-f", "dshow", "-i", "dummy"] exited with code 1

Thus not returning the output that I want to parse.

How can I get the output, regardless of exit status?

---

2. Btw, ffmpeg prints the output in stderr always, to keep stdout for piping video out. (It prints errors to ffmpeg.log). What's the closest to a .read() equivalent for stderr? :)

[Boscop]

Ah, just found the unchecked method -.-

[oconnor663]

Yep, unchecked. If you're interested in stderr output, it's easier to stop using the read helper method and go back to the more general run function, with something like .stdout_capture().stderr_capture().run(). Let me know if you have any feedback on this part of the API.

[azzamsa]

@Boscop I think it is safe to close this issue for now.