intel media sdk簡單編碼測試

前提：已經成功安裝了intel media sdk，可參考unbuntu12.04上安裝intel linux media SDK。

測試使用SDK提供的編碼例程（/opt/intel/mediasdk/samples/_bin/x64/sample_encode_drm）

下面是簡單的測試記錄：

1.編一路1080P視頻， 例程佔20%左右的CPU，0.4%的內存，且比較穩定。
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. 同時編兩路1080P視頻， 每一個例程佔20%左右的CPU，0.4%的內存，且比較穩定。
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


同時編2路1080P視頻， 時間和一路差很少。


3. 同時編4路1080P視頻， 每一個例程佔22%左右的CPU，0.4%的內存，且比較穩定。


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
竟然更快了！！！ 好神奇




4. 同時編6路1080P視頻，有點奇怪，6個例程中前4個先各佔28%左右的CPU，後兩個佔3%的CPU，內存均佔用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. 調整編碼參數，測試編碼速度和編碼質量。
1080P的視頻須要碼率2M以上才能保證良好效果。
測試1080P編碼速度可達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