c#生成AVI自动设置压缩格式，不调用AVISaveOptions

工作中遇到生成AVI视频的项目，代码中会调用AVISaveOptions来设置压缩格式，针对单个文件还好说，但是批量生成视频的时候，每一个都要设置格式，

体验不是很好，经过查询资料问题得到解决

最开始的代码：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

AVICOMPRESSOPTIONS opts = new AVICOMPRESSOPTIONS(); opts.fccType = _fccType; opts.fccHandler = 0; opts.dwKeyFrameEvery = 0; opts.dwQuality = 0; opts.dwFlags = 0; opts.dwBytesPerSecond = 0; opts.lpFormat = new IntPtr(0); opts.cbFormat = 0; opts.lpParms = new IntPtr(0); opts.cbParms = 0; opts.dwInterleaveEvery = 0; AVICOMPRESSOPTIONS* p = &opts; AVICOMPRESSOPTIONS** pp = &p; IntPtr x = _ps; IntPtr* ptr_ps = &x; AVISaveOptions(0, 0, 1, ptr_ps, pp); int hr = AVIMakeCompressedStream(out _psCompressed, _ps, ref opts, 0);

　　修改后的代码

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

opts.fccType = 0;            opts.fccHandler = (int)0x6376736d;            opts.dwKeyFrameEvery = 0;            opts.dwQuality = 10000;            opts.dwFlags = 8;            opts.dwBytesPerSecond = 0;            opts.lpFormat = new IntPtr(0);            opts.cbFormat = 0;            opts.lpParms = new IntPtr(0);            opts.cbParms = 4;            opts.dwInterleaveEvery = 0;            AVICOMPRESSOPTIONS* p = &opts;            AVICOMPRESSOPTIONS** pp = &p;            IntPtr x = _ps;            IntPtr* ptr_ps = &x;            opts.lpParms = Marshal.AllocHGlobal(sizeof(int));            //AVISaveOptions(0, 0, 1, ptr_ps, pp);            int hr = AVIMakeCompressedStream(out _psCompressed, _ps, ref opts, 0);

　　思路就是，Debug模式下，跟踪设置完压缩格式后

?

1	AVICOMPRESSOPTIONS结构体中各元素的值，其中lpParms需要利用

?

1	Marshal.AllocHGlobal(sizeof(int))来获取，其余根据监视的值设定即可