Slow memory leak with streamlink and Twitch

[bennyhillthebest]

mpv version and platform: 1:0.28.2-2 with Manjaro 17.1.10

Reproduction steps: "streamlink -p mpv twitch.tv/*** ###p"

Expected behavior: RAM usage by mpv stays constant in time

Actual behavior: mpv process slowly eats more and more RAM

Log file https://0x0.st/s_u3.txt

The log file talks about a "slow/stuck network connection" but on this occasion i made sure that the stream would not freeze or stop because of low cache, so i'm not sure what is the reason of this warning.

[CounterPillow]

are you sure this isn't just the backwards cache filling?

[bennyhillthebest]

On this instance the mpv RAM usage went from 100 megabytes to 280 megabytes, but i saw it other times going even to 600 megabytes. To me it looks exactly like a memory leak.

[j605]

Like @CounterPillow said, it is possibly just cache settings. Try with the mpv-git which has smaller cache defaults.

Look at demuxer-max-back-bytes and demuxer-max-bytes if you want to try it out yourself.

[bennyhillthebest]

You're right, with demuxer-max-back-bytes and demuxer-max-bytes the RAM usage at some point becomes constant.

But i tried as a value for the two options 10 megabytes at 360p (which should be good considering that the incoming cache uses at maximum 1-2 megabytes at 360p) and the final RAM usage was still 270 megabytes.

Limiting (and by a lot) the cache definitely helped, but in the end not that much. I'm kinda disappointed with this behaviour, because on local files mpv is great.