intel media sdk简单编码测试

前提：已经成功安装了intel media sdk，可参考unbuntu12.04上安装intel linux media SDK。

测试使用SDK提供的编码例程（/opt/intel/mediasdk/samples/_bin/x64/sample_encode_drm）

下面是简单的测试记录：

1.编一路1080P视频， 例程占20%左右的CPU，0.4%的内存，且比较稳定。
tvie@tvie:/opt/intel/mediasdk/samples/_bin/x64$ time sudo ./sample_encode_drm h264 -i /home/tvie/fcl.yuv -o es2.h264 -w 1920 -h 1080 -hw


Input file format       YUV420
Output video            AVC 
Source picture:
        Resolution      1920x1088
        Crop X,Y,W,H    0,0,1920,1080
Destination picture:
        Resolution      1920x1088
        Crop X,Y,W,H    0,0,1920,1080
Frame rate      30.00
Bit rate(Kbps)  3757
Target usage    balanced
Memory type     system
Media SDK impl          hw
Media SDK version       1.6


Processing started
Frame number: 1732
Processing finished


real    0m42.350s
user    0m5.816s
sys     0m3.536s




2. 同时编两路1080P视频， 每个例程占20%左右的CPU，0.4%的内存，且比较稳定。
Processing started
Frame number: 1732
Processing finished


real    0m44.012s
user    0m5.428s
sys     0m2.444s


=================
Processing started
Frame number: 1732
Processing finished


real    0m45.285s
user    0m5.312s
sys     0m2.300s


同时编2路1080P视频， 时间和一路差不多。


3. 同时编4路1080P视频， 每个例程占22%左右的CPU，0.4%的内存，且比较稳定。


real    0m29.013s
user    0m5.340s
sys     0m1.420s
=======
real    0m30.265s
user    0m5.304s
sys     0m1.456s
======
real    0m30.427s
user    0m5.364s
sys     0m1.368s
======
real    0m30.026s
user    0m5.212s
sys     0m1.520s
居然更快了！！！ 好神奇




4. 同时编6路1080P视频，有点奇怪，6个例程中前4个先各占28%左右的CPU，后两个占3%的CPU，内存均占用0.4%。
real    0m30.751s
user    0m6.084s
sys     0m2.004s
======
real    0m30.661s
user    0m6.036s
sys     0m1.900s
======
real    0m30.627s
user    0m6.136s
sys     0m1.928s
======
real    0m30.020s
user    0m5.952s
sys     0m1.956s
======
Processing started
Frame number: 100
Return on error: error code -17,        /msdk/validation/linux_val/validation/ww11.3_Linux-HSW-16.3.1_vc21_Ubuntu_12.04/samples/sample_encode/src/pipeline_encode.cpp       1305




ERROR: Hardware device was lost or returned an unexpected error. Recovering...
Frame number: 1722
Processing finished


real    0m48.319s
user    0m5.856s
sys     0m1.672s
======
Processing started
Frame number: 200
Return on error: error code -17,        /msdk/validation/linux_val/validation/ww11.3_Linux-HSW-16.3.1_vc21_Ubuntu_12.04/samples/sample_encode/src/pipeline_encode.cpp       1305




ERROR: Hardware device was lost or returned an unexpected error. Recovering...
Frame number: 1722
Processing finished


real    0m48.255s
user    0m5.852s
sys     0m1.696s




5. 调整编码参数，测试编码速度和编码质量。
1080P的视频需要码率2M以上才能保证良好效果。
测试1080P编码速度可达10倍速。

tvie@tvie:/opt/intel/mediasdk/samples/_bin/x64$ time sudo ./sample_encode_drm h264 -i /home/tvie/fcl.yuv -o es31.h264 -w 1920 -h 1080 -hw -f 25 -b 2000 -u speed


Input file format       YUV420
Output video            AVC 
Source picture:
        Resolution      1920x1088
        Crop X,Y,W,H    0,0,1920,1080
Destination picture:
        Resolution      1920x1088
        Crop X,Y,W,H    0,0,1920,1080
Frame rate      25.00
Bit rate(Kbps)  2000
Target usage    speed
Memory type     system
Media SDK impl          hw
Media SDK version       1.6


Processing started
Frame number: 1732
Processing finished


real    0m6.650s
user    0m5.328s
sys     0m1.292s