1.以手机上常用的MP4格式为例。打开格式工厂软件,单击[MP4]按钮;
![](/images/j2xml/526e3ecc21044e6bd32a0411b05f6cdd.png?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_jpg)
2.在弹出的配置框中点击右上角的[添加文件]按钮;
![](/images/j2xml/0e44aaf9997f870169a7b34db87aa356.png?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_jpg)
3.选择要处理的文件之后,从“文件信息”栏里可以看到当前视频的“屏幕大小”是1280X720,点击[输出配置]按钮;
![](/images/j2xml/faa588515a42d2a88b9db86c195c503f.png?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_jpg)
4.在视频设置里可以看到“配置”列表里的“视频流”的“屏幕大小”右边的值是“缺省”;
![](/images/j2xml/af1b8c2b788f55438cbf2dd920e414f5.png?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_jpg)
5.点击屏幕大小”右侧的下拉框,按自身手机的屏幕所需大小选择,如这里我选“800X600 SVGA”,点击[确定]按钮;
![](/images/j2xml/5c5ef632b8ed54637a09200f00449cbe.png?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_jpg)
6.接下来在右上角点击[确定]选项;
![](/images/j2xml/3ad7c50405073e39b341ee9a1bf0da0f.png?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_jpg)
7.单击[单击开始]按钮进行任务,完成后就改变视频的尺寸了。
![](/images/j2xml/56819af55d38c70bcbd8ceae60cc7b81.png?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_jpg)