C3VOC A/V Technician Helper

Python script to make the life an A/V technician at c3voc easier. It can play:

• individual outputs of voctomix
• RTMP streams (with custom audio track mapping)
• SRT streams (with multiple audio tracks)
• the final transcoded streams from the VOC CDN/ streaming website.

Keep in mind, that this tool uses assumptions about the VOC network and might not simply work in other situations.

Requirements

Python 3, ffmpeg (with ffplay) and mpv.

Usage

There are three basic commands with the hall ID as common parameter:

• ./vplay -s $hall [-a $num_audio_tracks] $command with commands:
  • cam $cam_no: Play a camera preview from voctomix
    • Positional argument: Camera Number
  • mix [-l [-t $track_no] ]: Play the voctomix mix preview
    • Optionally enable a loudness graph (-l) and select which audio track (-t track_num) to listen to
  • stream {hls-hd, hls-sd, webm-hd, webm-sd, slides} [-l [-t $track_no] ]: Play the transcoded stream from the CDN
    • Positional argument: Transcoding type (hls, webm, slides)
    • The hall ID (-s) can also be an arbitrary slug in this command
    • Optionally enable a loudness graph (-l) and select which audio track (-t track_num) to listen to
  • rtmp [-l [-t $track_no] ]: Play RTMP stream (same audio channel config as mix)
    • The hall ID (-s) must be the domain and path
    • Optionally enable a loudness graph (-l) and select which audio track (-t track_num) to listen to
  • srt [-l [-t $track_no] ]: Play SRT stream
    • The hall ID (-s) must be the domain and path
    • Optionally enable a loudness graph (-l) and select which audio track (-t track_num) to listen to

Python's help output is split. ./vplay -h shows the available commands and ./vplay $command -h shows the help for the individual command.

The player volume can be changed with the "9" and "0" keys in both ffplay (normal output) and mpv (loudness monitor output).