dede网站经常被挂马 怎么办,wordpress环境配置文件,网站建设广州市,好网站开发ffmpeg使用xfade的转场特效 1. 介绍2. ffmpeg里面的xfade3. 使用 1. 介绍 参考文档 ffmpeg是一个音视频编辑工具#xff0c;具体的。。。。我才搞接触#xff0c;所以不懂。 xfade是一种视频转场滤镜#xff0c;用于在两个视频片段之间创建平滑的过渡效果。xfade的转场效果… ffmpeg使用xfade的转场特效 1. 介绍2. ffmpeg里面的xfade3. 使用 1. 介绍 参考文档 ffmpeg是一个音视频编辑工具具体的。。。。我才搞接触所以不懂。 xfade是一种视频转场滤镜用于在两个视频片段之间创建平滑的过渡效果。xfade的转场效果入口 但是我有需求我的需求是实现翻页的效果。 我理解就是这样的效果。结论是xfade自带的效果没有这个不过它可以自己实现然而我不会哦所以。。。。我的需求这个方法gg了。 2. ffmpeg里面的xfade 官网文档里面少了还挺多。 抄下来 The filter accepts the following options:transition Set one of available transition effects:‘custom’ ‘fade’ ‘wipeleft’ ‘wiperight’ ‘wipeup’ ‘wipedown’ ‘slideleft’ ‘slideright’ ‘slideup’ ‘slidedown’ ‘circlecrop’ ‘rectcrop’ ‘distance’ ‘fadeblack’ ‘fadewhite’ ‘radial’ ‘smoothleft’ ‘smoothright’ ‘smoothup’ ‘smoothdown’ ‘circleopen’ ‘circleclose’ ‘vertopen’ ‘vertclose’ ‘horzopen’ ‘horzclose’ ‘dissolve’ ‘pixelize’ ‘diagtl’ ‘diagtr’ ‘diagbl’ ‘diagbr’ ‘hlslice’ ‘hrslice’ ‘vuslice’ ‘vdslice’ ‘hblur’ ‘fadegrays’ ‘wipetl’ ‘wipetr’ ‘wipebl’ ‘wipebr’ ‘squeezeh’ ‘squeezev’ ‘zoomin’ ‘fadefast’ ‘fadeslow’ ‘hlwind’ ‘hrwind’ ‘vuwind’ ‘vdwind’ ‘coverleft’ ‘coverright’ ‘coverup’ ‘coverdown’ ‘revealleft’ ‘revealright’ ‘revealup’ ‘revealdown’ Default transition effect is fade.duration Set cross fade duration in seconds. Range is 0 to 60 seconds. Default duration is 1 second.offset Set cross fade start relative to first input stream in seconds. Default offset is 0.expr Set expression for custom transition effect.The expressions can use the following variables and functions:X Y The coordinates of the current sample.W H The width and height of the image.P Progress of transition effect.PLANE Currently processed plane.A Return value of first input at current location and plane.B Return value of second input at current location and plane.a0(x, y) a1(x, y) a2(x, y) a3(x, y) Return the value of the pixel at location (x,y) of the first/second/third/fourth component of first input.b0(x, y) b1(x, y) b2(x, y) b3(x, y) Return the value of the pixel at location (x,y) of the first/second/third/fourth component of second input. 每种效果可以到前面的网址进入这里粘贴一些过来。 3. 使用 ffmpeg -i first.mp4 -i second.mp4 -filter_complex xfadetransitionrevealup:duration2:offset5 output.mp4使用first.mp4 second.mp4合成一个2s的转场视频从第一个视频的第5s开始合并。合并的特效是revealup示意图 |offset||duration| AAAAAAAAAAAAAAAAAAAAAAAABBBBBBBBBBBBBBBBBBBBBBBBBBB|| AAAAAAAAArevealupBBBBBBBBBBBB