亮瞎你眼的水流静止错觉

日期:2012年9月6日 分类:, 评论:发表评论 观看:2,229 次

本文来自【CG专题站】,转载请注明!文章源自狐狸影视城-https://fox-studio.net/video/5145.html

文章源自狐狸影视城-https://fox-studio.net/video/5145.html

转自youtube《Cool Sound and Water Experiment!》

实际上水一直在流动,听声音就知道了,之所以会有那样的效果是因为摄像机只能捕捉到它频率范围内的画面!当低音炮为24Hz时,水的震动也变成了24Hz,这和摄像机的帧率同步,最后出来的视频就是水静止住了。 当低音炮和水为23Hz时,摄像机帧率不变,仍为24Hz,这样出来的效果就是水往回流了。

This is really simple but has such an awesome effect. Fill a bucket full of water and place it about 5 feet off the ground. Place a subwoofer about 1 foot lower than the bucket. Run a plastic tube from the top bucket down in front of the subwoofer. Tape the tube to the front of the speaker. Then aim the end of the tube to an empty bucket on the floor. Get the water flowing from the top bucket. Now just generate a 24 hz sine wave and set your camera to 24 fps and watch the magic happen. Basically your cameras frame rate is synced up with the rate of the vibrations of the water so it appears to be frozen or still. Now if you play a 23 hz sine wave your frame rate will be off just a little compared to the sine wave causing the water to "move backward" or so as it appears. You can play a 25 hz sine wave and cause the water to move slowly foward.文章源自狐狸影视城-https://fox-studio.net/video/5145.html

文章源自狐狸影视城-https://fox-studio.net/video/5145.html
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