Talk:Video Playback Customization: Difference between revisions
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There is a line in this article that I don't think is quite right. ''The line is: You can already see that PAL can be played fine at 50 Hz, 75 Hz or 100 Hz, but NTSC cannot be played without begin jerky because all we have is 60 fps which is not a multiple of 29.97 fps.'' I suspect the intended meaning was "which is not a multiple of 23. |
There is a line in this article that I don't think is quite right. ''The line is: You can already see that PAL can be played fine at 50 Hz, 75 Hz or 100 Hz, but NTSC cannot be played without begin jerky because all we have is 60 fps which is not a multiple of 29.97 fps.'' I suspect the intended meaning was "which is not a multiple of 23.976 (24p)". 29.97fps is, for all intents and purposes, functionally equivalent to a multiple of a 60hz refresh rate (or as close as you're ever going to get, as it isn't like the 60hz refresh is perfectly timed either). |
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Also, for what it's worth, there is very little video out there of any source (unless poorly encoded) that is actually 24p, 30p, or 60i. When they say that, they actually mean 23. |
Also, for what it's worth, there is very little video out there of any source (unless poorly encoded) that is actually 24p, 30p, or 60i. When they say that, they actually mean 23.976, 29.97, and 59.94. The only modern examples would be very old archive NTSC video from before there was color broadcast, like some of that on Archive.org and the Library of Congress site. |
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[[User:Glynor|glynor]] 12:25, 2 May 2010 (CDT) |
[[User:Glynor|glynor]] 12:25, 2 May 2010 (CDT) |
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Latest revision as of 17:29, 2 May 2010
There is a line in this article that I don't think is quite right. The line is: You can already see that PAL can be played fine at 50 Hz, 75 Hz or 100 Hz, but NTSC cannot be played without begin jerky because all we have is 60 fps which is not a multiple of 29.97 fps. I suspect the intended meaning was "which is not a multiple of 23.976 (24p)". 29.97fps is, for all intents and purposes, functionally equivalent to a multiple of a 60hz refresh rate (or as close as you're ever going to get, as it isn't like the 60hz refresh is perfectly timed either).
Also, for what it's worth, there is very little video out there of any source (unless poorly encoded) that is actually 24p, 30p, or 60i. When they say that, they actually mean 23.976, 29.97, and 59.94. The only modern examples would be very old archive NTSC video from before there was color broadcast, like some of that on Archive.org and the Library of Congress site.
glynor 12:25, 2 May 2010 (CDT)