Get output name when using external downloader

[NightMachinary]

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Question

By searching through the issues, I have found this script for streaming videos, and I have tried adapting it to use aria2c:

#!/usr/bin/env python3
import subprocess, sys
import youtube_dl


player_run = False
p = None


def hook(status):
    global player_run, p

    if not player_run:
        print(f"Running mpv for {status['filename']} ...")
        player_run = True
        p = subprocess.Popen(['mpv', status['filename']])


opts = {
    'format': 'best',
    'nopart': True,
    'progress_hooks': [hook],
    # 'verbose': True,
    # 'external_downloader': 'aria2c',
    'noplaylist': True,
    'writesubtitles': True,
}

with youtube_dl.YoutubeDL(opts) as ydl:
    ydl.download([sys.argv[1]])

p.wait()

The problem is that when using an external downloader, the progress hook won't get called. How can I work around this?

[dstftw]

You can't, progress reporting does not work with external downloaders.