[x264-devel] Win32 large-address-aware?

[Jeppe Øland]

>>>>>>> While testing the new mb-tree code, memory usage runs rather high :-)
>>>>>>> I found that even on a 64-bit Windows, x264 is only allowed to
>>>>>>> allocate 2 GB memory.
>>>>>>
>>>>>> Try updating to the latest version; the memory usage has been greatly
>>>>>> reduced with the "threaded lookahead" change.
>>>>>
>>>>> I believe I am already running the latest version.
>>>>> Encoding 1080p content with --rc-lookahead 250 is a bit hungry.
>>>>
>>>> Then don't do that ;)
>>>>
>>>> Values over the default are mostly useless.
>>>
>>> I'm just running some tests on a short clip to see how things measure out.
>>> (Even going for --rc-lookahead 100 ran out of memory)
>>>
>>> Whether or not I should do that long-term is no reason to keep the exe
>>> limited if it works fine otherwise.
>>> Tomorrow I might be compressing a 4K video with shorter lookahead, and
>>> who knows how that would go ;-)
>>
>> Wait a minute, I just looked again at your original email, which I
>> obviously didn't read carefully enough...
>>
>>>While testing the new mb-tree code, memory usage runs rather high :-)
>>>I found that even on a 64-bit Windows, x264 is only allowed to
>>>allocate 2 GB memory.
>>
>> Er.... everyone I've talked to who uses 64-bit Windows has had no
>> issues with memory allocations over 2 gigabytes.
>
> I guess I wasn't being specific enough either.
> While the OS is 64-bit, I am actually running the 32-bit executeable.
>
> To make doubly sure, I just downloaded the latest 32-bit build from
> http://x264.nl/, and it runs out of memory at 2 GiB.
>
> I'm sure the 64-bit version will work fine - but a lot of GUIs wrap
> the 32-bit version regardless of OS.

I just tried the 64-bit version, and of course it doesn't work with AviSynth :-(
There are additional tools available to fix this, but it's still early
days == pretty flaky.
For the majority of users, a large-address-aware 32-bit version of
x264 would go a long way towards solving any current memory issues.

Regards,
-Jeppe