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：
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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
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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
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AVICOMPRESSOPTIONS结构体中各元素的值，其中lpParms需要利用 |
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Marshal.AllocHGlobal(sizeof(int))来获取，其余根据监视的值设定即可 |
c#生成AVI自动设置压缩格式，不调用AVISaveOptions,布布扣,bubuko.com
c#生成AVI自动设置压缩格式，不调用AVISaveOptions
原文：http://www.cnblogs.com/niuge/p/3758053.html