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–threads 2 参数
使用–threads 2 可以将CPU的使用率控制在50%左右。
FFmpeg -i IN –threads 2 OUT
源文链接:https://stackoverflow.com/questions/11357713/how-to-limit-ffmpeg-cpu-usage
The solution as outlined here
How can I limit FFMpeg CPU usage?
is to limit the number of threads that FFMpeg uses to less than the number of available cores on the computer.
Following up on your comment, you can supply an Argument via StartInfo
Process ffmpeg = new Process(); ffmpeg.StartInfo.UseShellExecute = false; ffmpeg.StartInfo.FileName = "..ffmpeg.exe"; ffmpeg.StartInfo.Arguments = "-threads 2"; // <=== Add this line ffmpeg.StartInfo.CreateNoWindow = true; ffmpeg.Start();
测试一 -threads
-threads 2 以两个线程进行运行, 加快处理的速度。
转换视频:7752c7dd-36aa-47eb-95a5-2193c9726541.wmv
目标视频:7752c7dd-36aa-47eb-95a5-2193c9726541.mp4
转换命令:FFmpeg -i IN -map 0 -r 25 -threads 4 -y Out
本机测试机环境:win7旗舰版+Intel(R) Core(TM)i5-2400 CPU @3.10GHz 3.10GHz+4.00GB+64bit
序号 | 开启的线程数 | 占用CPU数 | CPU使用率(%) | 转换时间(min) | 其他 |
1 | 1 | 1 | 25 | 7 |
|
2 | 2 | 4 | 40-55 | 3 | 2个CPU〉50%,1个=50%,1个CPU=40% |
3 | 4 | 4 | 60-70 | 3 | 4个CPU比较平均 |
4 | 4 | 4 | 70-80 | 2 | 4个CPU使用平均 |
5 | – | 4 | 80-85 | 2 | 4个CPU使用较平均 |
为了达到更快的转换速度,CPU使用率在可允许范围内,选择-threads 2。