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View Poll Results: Which one is better ?
[SD] H.264 42 84.00%
[SD] XviD 0 0%
[SD] DivX 1 2.00%
[HD] H.264 43 86.00%
[HD] DivX 1 2.00%
Other ??? 0 0%
Multiple Choice Poll. Voters: 50. You may not vote on this poll

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Old 22nd October 2008, 19:35   #1  |  Link
P.J
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[HELP] H.264 or XviD or DivX @ Low Bitrate ?

Which one is better for HD/SD resolution @ low bitrate ?
I think XviD doesn't support HD and WVC1/MPEG-2 doesn't provide good quality @ low bitrate xD

Thanks !
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Old 22nd October 2008, 19:43   #2  |  Link
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Define low bitrate

x264 will be better in all cases at any given bitrate - most likely..

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Old 22nd October 2008, 19:45   #3  |  Link
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I'm not aware of any HD limitations in Xvid. I got a 3840x2160 video encoded by Xvid here

However H.264 (x264) compresses more efficient than MEPG-4 ASP (Xvid). Especially at HD resolutions. And especially at low bitrates.
So I'd definitely go with x264. At a given bitrate x264 will certainly produce better quality than Xvid (except for overkill bitrates where both look transparent).
The only reason to use Xvid nowadays is compatibility to standalone devices that can't play H.264 video yet...
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Last edited by LoRd_MuldeR; 22nd October 2008 at 19:49.
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Old 22nd October 2008, 21:13   #4  |  Link
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Overall H.264 is vastly more efficient than XviD or DivX, especially when you're dealing with relatively low bitrates. At the high end of the spectrum differences even out, but H.264 still comes out as being slightly better.

In short, go with x264 if you need to work with low bitrates at good quality. AVC > ASP
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Old 22nd October 2008, 21:23   #5  |  Link
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=> H.264 FTW !

Can you compare H.264 with WMV/WVC1/VC1 and MPEG-2 @ Medium/High bitrare for both HD/SD resolution ?
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Old 22nd October 2008, 21:27   #6  |  Link
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Quote:
Originally Posted by P.J View Post
=> H.264 FTW !

Can you compare H.264 with WMV/WVC1/VC1 and MPEG-2 @ Medium/High bitrare for both HD/SD resolution ?
Sure. Note that test is a bit old; x264 has gotten quite a bit better since (it was before the finalization of psy-rd, psy-trellis, and b-adapt 2).
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Old 22nd October 2008, 21:28   #7  |  Link
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Here: http://mirror05.x264.nl/Dark/website/compare.html

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Old 22nd October 2008, 21:29   #8  |  Link
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Very roughly MPEG-2 requires ~25 MBit/s to produce decent quality for 1080p HD content, while H.264 requires only ~8 MBit/s.

Of course this may vary significantly from source to source...
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Old 22nd October 2008, 21:51   #9  |  Link
P.J
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Can you tell me which one is better ?
I don't want to download xD

[HD] Medium Bitrate: ?
[HD] High Bitrate: ?
[SD] Medium Bitrate: ?
[SD] High Bitrate: ?

Thanks very much !
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Old 22nd October 2008, 21:53   #10  |  Link
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Quote:
Originally Posted by P.J View Post
Can you tell me which one is better ?
I don't want to download xD

[HD] Medium Bitrate: ?
[HD] High Bitrate: ?
[SD] Medium Bitrate: ?
[SD] High Bitrate: ?

Thanks very much !
Download what and from what source?

And of course HD + High Bitrate will give best quality
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Old 22nd October 2008, 21:59   #11  |  Link
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If your source is a Blu-ray, go with 720p at a medium (~2-6 mbps) bitrate. Otherwise, if it's DVD leave it at SD resolutions and encode at 0.8-3 mbps. All these values vary with respect to source complexity and quality.
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Old 22nd October 2008, 22:44   #12  |  Link
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Still, asking what's better x264 or something else, in x264 forum... seems pointless.
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Old 22nd October 2008, 22:49   #13  |  Link
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Quote:
Originally Posted by lexor View Post
Still, asking what's better x264 or something else, in x264 forum... seems pointless.
Since when is Doom9 a x264 forum? Even the "MPEG-4 AVC" sub-forum is dedicated to H.264 in general, not only x264.

And most important: The OP asked whether Xvid (MPEG-4 ASP) or H.264 is to be preferred quality-wise at a given bitrate.
The answer clearly is H.264. This fact doesn't change, no matter on what forum it is asked/answered...
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Old 22nd October 2008, 22:56   #14  |  Link
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@LoRd_MuldeR: http://mirror05.x264.nl/Dark/website/compare.html
@lexor: NO! xD

For HD720/1080: [H.264/(W)VC1/MPEG-2]
Low Bitrate: ~6Mbps
Medium Bitrate: +12Mbps
High Bitrate: +24Mbps

For SD: [H.264/WMV/MPEG-2]
Low Bitrate: ~3Mbps
Medium Bitrate: ~6Mbps
High Bitrate: ~9Mbps

*EDITED*

Last edited by P.J; 22nd October 2008 at 23:01.
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Old 22nd October 2008, 23:01   #15  |  Link
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H.264 at 12 MBit/s should deliver excellent quality for HD content. H.264 at 24 MBit/s usually is overkill, even for 1080p material...

Just look at this 8 MBit/s 1080p H.264 sample:
http://files.x264.nl/force.php?file=...0.48.8mbit.mkv

(Looks excellent - and it was encoded with a pretty old version of x264)
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Last edited by LoRd_MuldeR; 22nd October 2008 at 23:11.
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Old 22nd October 2008, 23:02   #16  |  Link
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Quote:
Originally Posted by P.J View Post
For HD720/1080: [H.264/(W)VC1/MPEG-2]
Low Bitrate: ~6Mbps
Medium Bitrate: +12Mbps
High Bitrate: +24Mbps

For SD: [H.264/WMV/MPEG-2]
Low Bitrate: ~3Mbps
Medium Bitrate: ~6Mbps
High Bitrate: ~9Mbps
You kidding me? 9 megabit H.264 for SD?

You can't just lump H.264 and WMV and MPEG-2 together like that either

Nor can you lump together 720p and 1080p, since the latter needs roughly twice the bitrate of the former...
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Old 22nd October 2008, 23:16   #17  |  Link
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Quote:
Originally Posted by Dark Shikari View Post
You kidding me? 9 megabit H.264 for SD?

You can't just lump H.264 and WMV and MPEG-2 together like that either
MPEG-2 needs to 9Mbps bitrate -> DVD
I think MPEG-2/VC1 will perform better in high bitrate because of their low compression method xD

Quote:
Originally Posted by Dark Shikari View Post
Nor can you lump together 720p and 1080p, since the latter needs roughly twice the bitrate of the former...
?

For HD720: [H.264/(W)VC1/MPEG-2]
Low Bitrate: ~6Mbps
Medium Bitrate: +12Mbps
High Bitrate: +24Mbps

For HD1080: [H.264/(W)VC1/MPEG-2]
Low Bitrate: ~6Mbps
Medium Bitrate: +12Mbps
High Bitrate: +24Mbps

For SD: [H.264/WMV/MPEG-2]
Low Bitrate: ~3Mbps
Medium Bitrate: ~6Mbps
High Bitrate: ~9Mbps

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Old 22nd October 2008, 23:20   #18  |  Link
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I don't know well the 2 others formats but for H264 (x264) it will be something like this

[1080p]
Low bitrate : 6 Mbps
Medium bitrate : 8Mbps
High bitrate : 12+Mbps

[720p]
Low bitrate : 2 Mbps
Medium bitrate : 4Mbps
High bitrate : 6+Mbps

[SD (DvD)]
Low bitrate : less than 1 Mbps
Medium bitrate : 1.5Mbps
High bitrate : 2.5+Mbps
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Old 22nd October 2008, 23:24   #19  |  Link
Dark Shikari
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Quote:
Originally Posted by P.J View Post
For HD720: [H.264/(W)VC1/MPEG-2]
Low Bitrate: ~6Mbps
Medium Bitrate: +12Mbps
High Bitrate: +24Mbps

For HD1080: [H.264/(W)VC1/MPEG-2]
Low Bitrate: ~6Mbps
Medium Bitrate: +12Mbps
High Bitrate: +24Mbps
So you're saying, despite 1080p being twice the resolution of 720p, it doesn't need a higher bitrate for the same quality?
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Old 23rd October 2008, 00:09   #20  |  Link
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Even at 720p, you can coax some very good quality out of video at something like 2 mbps, I've done it before
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