通过设置"Alignment":"TopCenter"实现顶部居中，同时设置Y值指定字幕和屏幕上侧距离。
{"VideoTracks":[{"VideoTrackClips":[{"MediaId":"8f5cdf044b059b3adc7967ba1cbe****","Speed":2,"Out":10,"TimelineIn":0,"TimelineOut":5},{"MediaId":"8f5cdf044b059b3adc7967ba1cbe****","Speed":0.5,"In":10,"Out":20}]}],"AudioTracks":[{"AudioTrackClips":[{"MediaId":"756620ed48c9af022c66ee1cbe2e****","Speed":2}]}]}素材旋转通过设置"Type":"Rotate"旋转素材一定角度，目前仅支持旋转90°、180°、270°。
通过设置出点MaxOut截取视频，规则如下：
{"VideoTracks":[{"VideoTrackClips":[{"MediaId":"8f5cdf044b059b3adc7967ba1cbe****","MaxOut":10},{"MediaId":"8f5cdf044b059b3adc7967ba1cbe****","Effects":[{"Type":"Scale","Width":0.8,"Height":0.8}]}]}]}说明随机效果Timeline中支持设置多种随机效果，例如：随机截取、随机滤镜、随机特效、随机转场。
{"VideoTracks":[{"VideoTrackClips":[{"MediaId":"8f5cdf044b059b3adc7967ba1cbe****","TimelineIn":0,"Effects":[{"Comment":"从所有转场类型中随机选取一个","Type":"Transition","SubType":"random","Duration":1},{"Comment":"从该素材中随机截取5s的素材片段","Type":"Clip","SubType":"RandomClip","ClipDuration":5}]},{"MediaId":"8f5cdf044b059b3adc7967ba1cbe****","TimelineIn":5,"Effects":[{"Comment":"从open,zoom,disappear中随机选取一个特效","Type":"VFX","SubType":"open,zoom,disappear"}]},{"MediaId":"8f5cdf044b059b3adc7967ba1cbe****","TimelineIn":10,"Effects":[{"Comment":"pl4,colorfulstarry,flyfire中随机选取一个滤镜","Type":"Filter","SubType":"pl4,colorfulstarry,flyfire"}]}]}]}字幕制作视频添加换行字幕并设置对齐方式通过添加\n或\\n实现换行，添加Alignment属性设置对齐方式。
{"VideoTracks":[{"VideoTrackClips":[{"MediaId":"8f5cdf044b059b3adc7967ba1cbe****","Effects":[{"Type":"Text","X":33,"Y":34,"Content":"设置字幕纯色背景","FontSize":42,"BorderStyle":3,"FontColor":"#4B0082","Outline":3,"OutlineColour":"#FFDEAD"}]}]}]}图片相册制作不带字幕的图片相册设置图片展示顺序和每张图片的持续时长Duration创建图片幻灯片视频。
{"VideoTracks":[{"VideoTrackClips":[{"Type":"image","MediaId":"756620ed48c9af022c66ee1cbe2e****","Duration":3},{"Type":"image","MediaId":"8f5cdf044b059b3adc7967ba1cbe****","Duration":3},{"Type":"image","MediaId":"70dc95c0e31b71edbfe76fa3691c****","Duration":3}]}]}制作带字幕的图片相册设置图片展示顺序和每张图片的持续时长Duration，同时设置Effects属性，创建带字幕的图片幻灯片视频。