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| Porn Users Forum » bit-rates, artifacts and compressed video |
| 1-6 of 6 Posts | Page 1 |
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| 03-13-12 03:15pm - 4667 days | Original Post - #1 | |
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Micha (0)
Active User Posts: 321 Registered: Jul 04, '10 Location: san jose ca |
bit-rates, artifacts and compressed video I’ve seen references to artifacts and from context, infer that they are a bad thing. I know what an artifact is on an Egyptian dig, but am unaware of the video reference. Because of inadequate bit-rate, videos look compressed. What does compressed look like? I know what a bit is, and I know the meaning of rate, but beyond the flowing of data, what is bit-rate and how does it affect my viewing a video? I’ve seen references to bit-rates from 100 to 2,000, inferring that 2,000 is slow. Many paysites now offer HD video. 1080p don’t fly as well for me as 720p. I’ve extrapolated that the age of my puter has much to do with this. (4 or 5 years) I have noticed that I don’t see much difference between the two on a 27 inch screen and figure that viewing them on a 60 inch screen would make a difference. I am perfectly happy watching the 27 inch screen attached to my computer for erotica. I’ll watch Star Wars in blu-ray on the four footer in the other room. The 1080p on my monitor stutters, hic-cough and the sound track is not aligned with the vid. It is disconcerting to hear a lady speak full sentences while her mouth is full. Because of the file size difference between the two, 1.2G vs 3 to 5 G, and the paysites offering only the larger file, they’re not doing me any favors. A 2T hard drive will only hold 200 movies at that rate. Is everyone watching downloaded porn on the big screen in the other room? I am presently a member of Reality Kings ( not for long with their DL restrictions) and am locked in to 480 line vids. Where are the holograms, flying cars and rocket belts promised us by the Jetsons? To recap : What is an artifact? What does a compressed video look like? What is a bit-rate? Thanks for any help on this Michael unless life also gives you water and sugar, your lemonade is gonna suck. | |
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| 03-13-12 06:08pm - 4667 days | #2 | |
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RagingBuddhist (0)
Disabled User  Posts: 893 Registered: Jan 23, '07 |
Wiki is better than I am at explaining artifacts. A bit rate is the number of bits that are being processed in a specified unit of time. There's a good article with an analogy to explain it better on this site. Lowering the bit rate on a video is a form of lossy compression. If 1080p video stutters on your computer, it's probably because it isn't powerful enough to handle that much data. High definition video requires a lot of your computer's resources. Processor speed is the first thing you need to look at. A decent amount of RAM is good to have as well, but nowhere near the need for a strong CPU. Can't help you with the Jetsons predictions. As a kid, I was in love with Judy and didn't pay attention to much else on the show. Sarcasm is a body's natural defense against stupidity. | |
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| 03-14-12 04:00am - 4667 days | #3 | |
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BadMrFrosty (0)
Active User Posts: 124 Registered: Mar 05, '10 Location: Prague (Czech Republic) |
What is an artifact? Watch a tube video, you see the blockyness that appears? That's one example. Watch a DVD and find a dark scene, see the graininess? That another example. Basically artifacts are things not present in the original video but have been introduced due to compression. What does a compressed video look like? Pretty much ALL video is compressed, even that 50GB bluray you have. Raw uncompressed HD video take up hundreds of gigabytes per hour. What is a bit-rate? The amount of data that is used to store the frame information. A high bitrate does not guarantee a good picture, things like the encoding method used, the codec and the source video play a massive role. When joining a new site its usually a good idea to download a range of formats and see what looks best for you as it will vary depending on how they encoded. The quality of a 1080P video at a bitrate of 8mbps will vary from site to site. The issue of your PC struggling with 1080P may be fixed quite easily. First of all, if you have a video card that supports hardware accererated video playback and the video you want to watch is compliant (I find 60%-70% are) then its a case of using playback software that supports DXVA, I use mpc-hc. If you video card does not support it you can get one very cheaply, ~$20, that will. The problem with the world is stupidity. Not saying there should be capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa | |
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| 03-14-12 08:47am - 4666 days | #4 | |
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Cybertoad (0)
Disabled User  Posts: 2,158 Registered: Jan 01, '08 Location: Wash |
Good information . Since 2007 | |
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| 03-17-12 12:54pm - 4663 days | #5 | |
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Micha (0)
Active User Posts: 321 Registered: Jul 04, '10 Location: san jose ca |
BadMrFrosty, RagingBuddhist: Thank you so much. When questions are answered, they invariably lead to more questions. Watch this space. michael unless life also gives you water and sugar, your lemonade is gonna suck. | |
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| 03-17-12 02:52pm - 4663 days | #6 | |
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Drooler (0)
Disabled User  Posts: 1,831 Registered: Mar 11, '07 Location: USA |
Maybe a good general definition of artifact is "the stuff that's left after a process, which is evidence of the process," though it's meant for science and not, say, dinner. Years ago on the Internet, it was more common to see photos with "halos" around the edges of a subject, especially against a plain colored background. Those were artifacts of compression. I wanted something new, so I left England for New England. | |
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