File talk:Seizure clip from Dennō Senshi Porygon.ogg

Untitled
It took me a while to get this, ffmpeg2theora wasn't being particularly cooperative...

At any rate, I can cut the video down just to scene 6, if people think it's too long as it stands. ~九尾の氷狐~ (「Sumimasen!」 「Dochira samaka?」) 09:03, 20 January 2009 (UTC)

It's been cut down now. ~九尾の氷狐~ (「Sumimasen!」 「Dochira samaka?」) 20:07, 20 January 2009 (UTC)

Warning should be in place
Since watching this scene can cause medical problems including seizures, I think there should be a warning message on the file, and making sure that everyone gets the message, either by putting it in front of the video, or putting a big warning template on it. Techman224 Talk  03:10, 16 July 2009 (UTC)
 * I think it isn't dangerous as far as is it not seen fullscreen and close to the screen. Anyway, a warning would do no harm and may save someone from a dizzy experience.212.183.240.71 (talk) 01:39, 26 August 2009 (UTC)

Is it safe to watch?
Is this video safe to watch if it's not full screen? (I'm too chicken) 58.107.231.53 (talk) 04:42, 24 October 2009 (UTC)
 * No it is NOT safe.
 * There is a possibility that if it is watched it may cause a reaction, even though it is a small risk it is still a risk. THe numbers quted are 1 in 4000
 * Chaosdruid (talk) 23:29, 5 February 2010 (UTC)
 * Don't -- this made me feel VERY odd even in the little wikipedia viewing box in the article. M00npirate (talk) 05:05, 29 June 2010 (UTC)

Suggest Replacement with screenshots
I suggest that due to a seizure risk, this video should not be on Wikipedia. I suggest that it be replaced by a series of 2 or more screenshots side-by-side to illustrate what was going on without the risk. Althepal (talk) 20:46, 4 June 2010 (UTC)
 * Because the fortage is of a low quality, it wont have the same effect of it being on a proper screen at high quality. But I do agree, it should have warning, just in case. Alec scheat (talk) 03:14, 14 January 2011 (UTC)
 * See the (numerous) discussions at Talk:Dennō Senshi Porygon. Melicans (talk, contributions) 04:51, 14 January 2011 (UTC)

Urban legend
No internet content has ever caused anyone to have a seizure. The user's computer monitor is what is strobing, not the content. Content viewed on a monitor cannot "strobe" any faster or slower than the monitor itself. People who are subject to seizures from a computer monitor will have a seizure triggered regardless of what is being shown on the monitor. Flashy videos can be annoying, but they do not cause seizures. --Sue Rangell ✍ ✉ 22:03, 8 October 2013 (UTC)
 * I'm going to be cautious, and revert first, and then ask for a reference. I'm by no means an expert, I've merely read Photosensitive_epilepsy (and "Web design" underneath) and the associated WCAG guidelines. If you can prove otherwise, we can happily remove the warning again. :) –Quiddity (talk) 06:11, 11 October 2013 (UTC)


 * Why would a television be able to cause seizures but not a computer monitor? And people do not have seizures, or headaches and exhaustion caused by any content, only certain content.   D r e a m Focus  13:46, 11 October 2013 (UTC)
 * It's not what is being shown, it's the flickering of the screen. TVs, computer monitors, and movie theatre screens all flicker at different rates. It's the slower flickering that is the most dangerous to those with photosensativity, like the flickering of a movie, or the shimmering of sunlight on a lake. Older TVs, like the one they say was used to watch this video, flickered at 12hz or so. The oldest of computer monitors flickered at 60hz or better.(much faster, and safer, but still theoretically a danger regardless of what is being shown on the screen) Newer computer monitors and HDTVs are incredibly faster, and flicker at 120hz, 240hz, 600hz, or better. I'll let you folks decide what you want to do, but I get a chuckle everytime I encounter this one. I'd ask for somebody to cite an instance where anyone has ever suffered a siezure while viewing internet content, but I'm hoping that intelligent people can do their own research and not feed Urban Legends like this one. I'm not on a crusade or anything, but we should all be thinking about the quality of Wikipedia, and the effect that totally unreferenced, scary warnings, do to our image. --Sue Rangell ✍ ✉ 18:43, 11 October 2013 (UTC)
 * Some of us do get headaches from flashing lights even on the computer monitor. Various people have posted this in a previous discussion.  So a warning just to warn people away from that makes sense.   D r e a m Focus  22:12, 11 October 2013 (UTC)
 * I changed the warning so that it is more specific, hopefully everyone will find it more acceptable. --Sue Rangell ✍ ✉ 21:24, 12 October 2013 (UTC)
 * The change seems fine to me.
 * However, I did find this page, https://www.epilepsy.org.uk/info/photosensitive-epilepsy/computer-television-screens which provides a decently detailed overview of the variables. Ie. Not an "urban legend", but not as much of a problem as it was in the old 100% CRT and low-Hz days. HTH. –Quiddity (talk) 21:43, 12 October 2013 (UTC)
 * Very good then. Just FYI, the urban legend aspect I refer to is that there has never been any instance of a seizure that has been triggered by internet content. That is very true. Apparently there is still some danger in anything that strobes, and that should also be a consideration. But the fact that it has never actually happened, brings the likelyhood to a statistical zero, so the mass-hysteria about flashy internet content is completely unfounded, even though there is some danger of it happening to somebody someday. --Sue Rangell ✍ ✉ 19:26, 13 October 2013 (UTC)
 * My computer was bought in 2007, and the monitor was at a set 60MHZ with the ability to raise it to a refresh rate of 75 which I did after reading the link Quiddity provided. You can have problems at 60MHZ.  I've had flashing lights cause me problems, although no seizures.  Not idea when all monitors started being superior, but many people out there still use the old ones.   D r e a m Focus  19:32, 13 October 2013 (UTC)
 * Exactly! It's the monitors, not the content. A flashing advertizement on an old CRT could trigger a seizure, while the same flashy ad on a modern screen is perfectly safe. This is because whatever rate the content is strobing at, is re-adjusted and forced to the rate of the screen being viewed. a 12hz flash becomes a 600gz rate on a 600gz screen. The higher the hz, the less the danger. Contrasting colors play a role as well. That all having been said, such images are still very annoying, and there is not a doubt in my mind that they produce headaches, especially considering the eyestrain. --Sue Rangell ✍ ✉  19:44, 13 October 2013 (UTC)

Untitled
Feel free to revert if you feel the quality of my file is either a bit too high, the video screen resolution is too big, or for another reason. Also, see: WINC Somebody500 (talk) 20:54, 1 August 2014 (UTC)