Re: Linux doesn't seem to manage memory very well

The Natural Philosopher <tnp@invalid.invalid> wrote:

On 03/05/2024 08:45, Computer Nerd Kev wrote:

The Natural Philosopher <tnp@invalid.invalid> wrote:

On 03/05/2024 00:23, Computer Nerd Kev wrote:

I don't use web browsers to play video. If you're streaming super
high resolution video through your browser with the latest and
greatest compression algorithms, then it probably has the right
to chew up a lot of RAM.
>

I use browsers to play videos. RAM usage is not massive. CPU usage is.

 
Perhaps RAM usage isn't that great on the scale of systems with tens
of GB of RAM. Compared to 2GB I think it may be significant because
when I tried to transcode a 1920x1080 video in AV1 format to
lower-res MPEG4 on a VPS with 1GB RAM + 1GB swap space, ffmpeg
(v. 4) surprised me by running out of RAM. Of course it could be a
bug in that decoder, but not having tackled much AV1 video before I
concluded that high resolutions plus modern video codecs requires
lots of RAM.
 

Transcoding is not playing

They both involve decoding. I converted other HD video to the same
output format without RAM issues, so the difference was the input
format, decoding the AV1 video, which applies to playback and
transcoding. Maybe it was a bug in ffmpeg, but as I haven't seen
benchmarks for memory usage online so I concluded from my own
experience. After a recent OS upgrade the VPS now has ffmpeg 5
installed, so I'll see what happens next time some AV1 video comes
my way.

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