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15th February 2006, 16:48 | #81 | Link |
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Core AVC decoder has very high average speed. Faster than average ffdshow Xvid decoding PP4.
But it may be usefull to invistigate speed of the decoders in function of time. I obtain some result with high-motion video : 1. Xvid ffdshow PP4 - approx. 70% of CPU usage 2. Core AVC decoder decoding x264 HP - average CPU was approx 50-55%. But for example due to large number of ref. frames there were peaks of CPU usage (100%) However I'm happy with a new Core AVC decoder As a conclusion. Xvid had 70% of CPU usage but without 100% peaks. Core AVC had higher decoding speed than FFdshow-Xvid speed but has some peaks on high motion due to long prediction (ref, weightb etc.). As a result Core AVC has drop frame and/or not smooth playback. Last edited by IgorC; 15th February 2006 at 16:50. |
15th February 2006, 17:46 | #82 | Link |
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Drop frame / speed low peaks are due to bitrate surge, and only to that. The decoding time spent in the picture processing ( interpolation, deblocking, weighted, mref ) is *roughly* constant, while decoding time for cabac is *totally* proportionnal to the bitrate, and the bitrate can vary a lot.
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15th February 2006, 18:31 | #84 | Link |
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CABAC eats CPU cycles almost proportionally to the bitrate...
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15th February 2006, 18:38 | #86 | Link | |
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20th February 2006, 02:42 | #87 | Link | |
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20th February 2006, 13:03 | #88 | Link |
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devs have stated that sse2 is hardly useable for avc decoding (eg libavcodec doesnt use sse2 at all for avc decoding)
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Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ | AVC/H.264 FAQ | AAC FAQ | MP4 FAQ | MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora | Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free |
3rd March 2006, 10:41 | #92 | Link |
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the intervideo decoder is an old version of the videosoft decoder i have in my comparison already
the last windvd build i checked (7.0.27.172, i think from this feb) still had that old build from 2004, which surely doesnt support the nvidia gpu so unless there is a new windvd version out with new decoder you cant use it with nvidia
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Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ | AVC/H.264 FAQ | AAC FAQ | MP4 FAQ | MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora | Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free |
18th April 2006, 17:31 | #94 | Link | |
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also i am waiting for elecard, so i guess it will take some time till i update the comparison
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Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ | AVC/H.264 FAQ | AAC FAQ | MP4 FAQ | MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora | Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free |
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18th April 2006, 18:51 | #95 | Link | |
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18th April 2006, 19:18 | #96 | Link | |
Life's clearer in 4K UHD
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Cheers
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18th April 2006, 22:00 | #97 | Link |
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18th April 2006, 22:48 | #98 | Link | |
Does it really matter?
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In case you couldn't read it: This version disables the spacebar while the program is open. Windows XP pro SP2. |
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19th April 2006, 02:35 | #99 | Link |
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I have a relatively high end system what benefits would I see with a good decoder?
I have watched a lot of AVC content, and the decoder is probably Nero AVC or something like that (because I have Nero suite installed), and I haven't had any problems with playback. Would there be a really good quality benefit, so good that I should go out and purchase CoreAVC? Because decoding speed isn't a problem, even at high bitrates (I have encoded at 16 mbps and played it back just fine). |
19th April 2006, 07:50 | #100 | Link | |
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