HydrogenAudio

Hydrogenaudio Forum => General Audio => Topic started by: ProxyCell on 2018-02-05 18:14:12

Title: How does AC3 compare to MP3 in terms of computational power requirements?
Post by: ProxyCell on 2018-02-05 18:14:12
In terms of decoding, which one can be done with the weakest CPU/RAM/etc?

I'm interested as we are now having to deal with some incredibly ancient devices. To put it into perspective for you: The video will be xvid encoded as h264 is a struggle on them.


QUICK EDIT:
If we went with AC3 or MP3, they would be laid out as such if it matters:
44.1kHz
ac3 - 256k
mp3 - 192k
Title: Re: How does AC3 compare to MP3 in terms of computational power requirements?
Post by: lvqcl on 2018-02-05 19:21:18
To put it into perspective for you: The video will be xvid encoded
What's the resolution of this video?
Title: Re: How does AC3 compare to MP3 in terms of computational power requirements?
Post by: ProxyCell on 2018-02-05 19:24:07
it will be 853x480
Title: Re: How does AC3 compare to MP3 in terms of computational power requirements?
Post by: lvqcl on 2018-02-05 19:54:09
IIRC: AC3 is flightly faster to decode than MP3 (see post #61 (https://hydrogenaud.io/index.php/topic,114049.msg946232.html#msg946232) and post #66 (https://hydrogenaud.io/index.php/topic,114049.msg946238.html#msg946238) of another thread) but I doubt that you'll be able to see the difference. Audio decoding require much less CPU resources that video decoding.
Title: Re: How does AC3 compare to MP3 in terms of computational power requirements?
Post by: ProxyCell on 2018-02-05 20:29:07
Thanks for the tip and link! Its quite a struggle to make it all work right now so we're looking for anything else to help.
Title: Re: How does AC3 compare to MP3 in terms of computational power requirements?
Post by: saratoga on 2018-02-05 21:29:18
https://hydrogenaud.io/index.php/topic,82125.0.html

Here are some benchmarks on ARM. AC3 is a lot less complex than mp3, but probably compared to video both are too fast to matter.