[x264-devel] Optimizing x264 for lowest memory usage

[Michael Toon]

The '--tune zerolatency' option may help reduce the memory usage. This will apply the following options:

--bframes 0 --force-cfr --no-mbtree
--sync-lookahead 0 --sliced-threads
--rc-lookahead 0

This is aimed to reduce the latency, but should also improve the memory usage as a consequence.

Mike

-----Original Message-----
From: x264-devel [mailto:x264-devel-bounces at videolan.org] On Behalf Of Henrik Gramner
Sent: 08 March 2016 18:20
To: Mailing list for x264 developers <x264-devel at videolan.org>
Subject: Re: [x264-devel] Optimizing x264 for lowest memory usage

On Mon, Mar 7, 2016 at 3:04 PM, Yakov Sudeikin <yakovs at setplex.com> wrote:
> Hi, I am using x264 with GStreamer, and I experience too much memory
> consumption 300-3000 MB per stream (not even HD), are there any
> compile-time options or other tricks to reduce the RAM usage to
> minimum, even sacrificing some performance? I want to run on a memory scarce system.
>
> Thank you.

What x264 settings are you using? If you're using overly slow settings, try using faster ones. rc-lookahead in particular tends to use quite a lot of memory.

However, it's a bit odd that you're getting 3GB memory usage with SD resolution, are you certain that it's allocated by libx264?
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