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Showing content from https://github.com/divout/mpv_reduce_stream_cache below:

divout/mpv_reduce_stream_cache: Reduces MPV cache for streams by increasing playback speed.

Reduces MPV cache for streams by increasing playback speed. It meant to work with Twitch through Streamlink. I find this setup has a few hundred milliseconds lower latency than the Twitch web player.

Copy related folders to your MPV config folder ~/.config/mpv.

In ./script-opts/reduce_stream_cache.conf, you can adjust when to start and stop speeding up the playback. The default configuration is quite aggressive, and it works fine on a wired stable Internet connection. But if you or your streamer have an unstable Internet connection, consider increasing enable_faster_speed_over_cache_seconds to prevent often speed changes. Or turn off this script with a shortcut.

MPV has its own low-latency profile. But the profile below has lower latency in my setup.

# ~/.config/mpv/mpv.conf
[stream]
demuxer-lavf-o-add="fflags=+nobuffer+fastseek+flush_packets"
cache=no
deband=no
dither-depth=no
scale=bilinear
cscale=bilinear
dscale=bilinear
scale-antiring=0
cscale-antiring=0
dither-depth=no
correct-downscaling=no
sigmoid-upscaling=no
Start a stream with Streamlink.
streamlink twitch.tv/twitch \
  best \
  -p "mpv" \
  --player-args="--profile='stream' --script-opts='enable-stream-cache-reduction=true'" \
  --title="stream-twitch" \
  --twitch-low-latency \
  --twitch-disable-ads \
  --ringbuffer-size=256M

You can put it in the gnome extension or modify the play-with-mpv Chrome extension to your liking.

If you use the MPV profile that disables cache, you won't be able to seek the video stream. As a workaround, you can record the stream to /tmp/ and open the recorded video with a shortcut.

streamlink twitch.tv/twitch \
  best \
  -p "mpv" \
  --player-args="--profile='stream' --script-opts='enable-stream-cache-reduction=true'" \
  --title="stream-twitch" \
  --twitch-low-latency \
  --twitch-disable-ads \
  --ringbuffer-size=256M \
  --record="/tmp/stream-twitch.mp4" \
  --force

Then pressing ' will open the recorded video. See ./script-opts/stream_replay.conf for configuration.


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