方法如下:
操作设备:戴尔笔记本电脑
操作系统:win10
操作程序:pr2019 v9.21
1、首先点击pr工作界面顶部红色箭头所指的“文件”。
![](https://iknow-pic.cdn.bcebos.com/a5c27d1ed21b0ef416db18cecfc451da81cb3e6a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、在弹出的下拉菜单中选择红色方框中的“导出-媒体”。
![](https://iknow-pic.cdn.bcebos.com/9345d688d43f8794adccc8bec01b0ef41bd53a6a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、接着点击红色方框中的“导出设置”下的“格式”。
![](https://iknow-pic.cdn.bcebos.com/d53f8794a4c27d1ed915bb5409d5ad6eddc4386a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、接着选择红色方框中的“H.264”。
![](https://iknow-pic.cdn.bcebos.com/fd039245d688d43f8f9a11626f1ed21b0ef43b6a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
5 、选择下方红色箭头所指的“视频”。
![](https://iknow-pic.cdn.bcebos.com/1ad5ad6eddc451da90c58c7ba4fd5266d016326a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
6、点击“比特率编码”右侧的菜单方框。
![](https://iknow-pic.cdn.bcebos.com/80cb39dbb6fd5266c518bc84b918972bd407366a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
7、在弹出的菜单中选择红色方框中的“CBR”。
![](https://iknow-pic.cdn.bcebos.com/8694a4c27d1ed21b02faae75bf6eddc451da3f6a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
8、然后将“目标比特率”改为4。
![](https://iknow-pic.cdn.bcebos.com/0ff41bd5ad6eddc441d4346b2bdbb6fd5266336a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
9、然后可以看到调整后的视频文件大小约为15MB,然后保存。
![](https://iknow-pic.cdn.bcebos.com/d788d43f8794a4c2771067bb1cf41bd5ad6e396a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
10、视频压缩前后的大小对比。
![](https://iknow-pic.cdn.bcebos.com/ac6eddc451da81cb2bd5035d4066d0160924316a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)