"Uncaught TypeError: Must be a file URL" in encoding_event_stream_test when trying to use module

[markmals]

I'm currently trying to use this module in my own script. When trying to run the simplest of tests on my script that uses fast forward, I get the following error:

import { ffmpeg } from "https://deno.land/x/[email protected]/mod.ts"
import { assert } from "https://deno.land/[email protected]/testing/asserts.ts"
Deno.test("fast_forward runs", async () => {
    await ffmpeg("<path to mkv>")
        .output("<path to mp4>")
        .encode()

    assert(true, "works")
})

error: Uncaught TypeError: Must be a file URL.
    throw new TypeError("Must be a file URL.");
          ^
    at fromFileUrl (https://deno.land/[email protected]/path/posix.ts:487:11)
    at https://deno.land/x/[email protected]/encoding_event_stream_test.ts:21:33
The terminal process "deno 'test', '--allow-all', '--unstable', '--filter', 'fast_forward runs', '.../transcodeDir_test.ts'" terminated with exit code: 1.

I'm new to Deno, so I might be overlooking something, but nothing about my input should be causing this error, especially in a global constant in a test file. I'm using deno 1.13.2.

[SnowGuest]

I also encountered this problem

[denizdogan]

If you import ffmpeg.ts instead of mod.ts, it works. For some reason the author of this module decided to import unit tests in mod.ts. Maybe this is an old Deno convention?

[brzostekd]

Thank you @denizdogan. Too bad that it won't be fixed. 🤷‍♂️