Support for streaming on afplay

[vegetableman]

Would like to know if it's possible to support streaming on a command-line player like afplay (a mac app)?
afplay allows audio playback of a video with out opening up any gui.

Using command:
youtube-dl -o - https://www.youtube.com/watch?v=z4PKzz81m5c | afplay -

gives the following error:-

unknown argument: -


    Audio File Play
    Version: 2.0
    Copyright 2003-2013, Apple Inc. All Rights Reserved.
    Specify -h (-help) for command options

Usage:
afplay [option...] audio_file

Options: (may appear before or after arguments)
  {-v | --volume} VOLUME
    set the volume for playback of the file
  {-h | --help}
    print help
  { --leaks}
    run leaks analysis
  {-t | --time} TIME
    play for TIME seconds
  {-r | --rate} RATE
    play at playback rate
  {-q | --rQuality} QUALITY
    set the quality used for rate-scaled playback (default is 0 - low quality, 1 - high quality)
  {-d | --debug}
    debug print output
[youtube] z4PKzz81m5c: Downloading webpage
[youtube] z4PKzz81m5c: Extracting video information
[youtube] z4PKzz81m5c: Downloading DASH manifest
[download] Destination: -
[download]   0.1% of 12.92MiB at  1.29MiB/s ETA 00:09

ERROR: unable to write data: [Errno 32] Broken pipe

[dstftw]

Looks like afplay does not support playing from stdin.

[jaimeMF]

There's an open issue for adding a --play option: #628.
Since this doesn't seem to be a problem in youtube-dl I'll close the issue (mplayer or mpv work without problem with that command).