WebM VP9 Multimedia Architecture Lab Overview

Explore the WebM VP9 Lab at the department of Computer Science, Hsinchu, Taiwan in December 2014. The lab focuses on multimedia architecture and processing, showcasing software demonstrations, test conditions, coding results, and performance comparisons. Discover the software repository links, Cygwin installation instructions, Yasm download options, and steps to set up the software package. Follow the detailed guide including selecting installation directories, internet connections, download sites, and packages for development and compilation.

• WebM
• VP9
• Multimedia
• Architecture
• Processing

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1. 1 WebM VP9 Lab Multimedia Architecture and Processing Lab (MAPL) Department of Computer Science December, 2014 Hsinchu, Taiwan

2. Agenda 2 Software Demonstration Lab1 Test Conditions and Coding Results Lab2 Performance Comparison Between Different SpeedSteps Lab3

3. Software Repository 3 http://www.webmproject.org/code/ clone https://chromium.googlesource.com/webm/libvpx push ssh://gerrit.chromium.org:29418/webm/libvpx.git browse https://chromium.googlesource.com/webm/libvpx/ mirror https://github.com/webmproject/libvpx/

4. Software Repository 4 https://github.com/webmproject/libvpx/

5. Cygwin 5 https://cygwin.com/install.html setup-x86.exe

6. Yasm 6 http://yasm.tortall.net/Download.html Win32 VS2010 .zip (for use with VS2010+ on 32-bit Windows) Win64 VS2010 .zip (for use with VS2010+ on 64-bit Windows) Win32 .exe (for general use on 32-bit Windows) Win64 .exe (for general use on 64-bit Windows) CygWin32 .exe (for CygWin use) DOS .exe (for use on pure DOS or for use with DJGPP) Win32 .exe (for general use on 32-bit Windows)

7. Software Package 7

8. Cygwin 8 Install form internet

9. 9 Select root install directory

10. 10 Select local package directory

11. 11 Select your internet connection

12. 12 Choose a download site ftp://ftp.ntu.edu.tw

13. 13 Select packages Devel O Default Bin Src binutils: GNU assember, linker, and similar utilities gcc-core: GNU Compiler Collection (C, OpenMP) gcc-g++: GNU Compiler Collection (C++) gdb: The GNU Debugger make: The GNU version of the make utility mingw- gcc-core: GNU Compiler Collection (C, OpenMP) mingw- gcc-g++: GNU Compiler Collection (C++)

14. 14 Resolving dependencies

15. 15 Progress

16. 16 Finish

17. Yasm 17 Rename Win32.exe with yasm.exe Put yasm.exe in C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin Put yasm.rules in C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\VCProjectDefaults

18. Build the Visual Studio Project 18 Clone libvpx to /cygdrive/c/libvpx Creat the build directory /cygdrive/c/build Configure the build root $ cd /cygdrive/c/build $ ../libvpx/configure --target=x86-win32-vs9 --enable-static-msvcrt Build the VS projects $ make More detail $../libvpx/configure --help

19. Make Binary Executables 19 Integrated development environments (e.g. VS2008) C:\build\vpx.sln Yasm vpxdec vpxenc

20. Make Binary Executables 20 Output directory & binary executables C:\build\Win32\Release Decoder Encoder

21. Run Encoding 21 Sample Batch File (e.g. Windows 7) ./ Lab1_vpxenc.cmd Description of Batch Command SET EncoderBin=###pathname to the encoder s binary executable### SET Seq=###name to the test sequences### SET InputYuv=###pathname to the test sequences### SET FrameToBeEncoded=### the number of frames to be encoded### SET FrameToBeSkip=### the number of frames to be skipped### SET SpeedStep=###the encode speed (values from 0 to 5)### SET QP=###quantization parameters### SET BitstreamFile=###name to the encoder s output bitstream file###

22. Example 22 Sample Test Condition Test sequence : Traffic_2560x1600_30_crop.yuv Quantization parameter : 17 Sample Commands SET EncoderBin=vpxenc SET Seq=Traffic_2560x1600_30_crop SET InputYuv=.\sequence\%Seq%.yuv SET FrameToBeEncoded=1 SET FrameToBeSkip=0 SET SpeedStep=5 SET QP=17 SET BitstreamFile=.\output\%SpeedStep%\%Seq%\%QP%\bst.webm

23. Run Decoding 23 Sample Batch File (e.g. Windows 7) ./ Lab1_vpxdec.cmd Description of Batch Command SET DecoderBin=###pathname to the decoder's binary executable### SET Bitetream=###pathname to the bitstream to be decoded### SET OutputYuv=###pathname to the decoded sequence###

24. Example 24 Sample Case Bitstream to be decoded : bst.webm Filename of decoded sequence to be: dec.yuv Sample Commands SET DecoderBin=vpxdec SET path=.\output\5\Traffic_2560x1600_30_crop\17 SET Bitetream=%path%\bst.webm SET OutputYuv=%path%\dec.yuv

25. Encoder and Decoders Report 25 Per frame report Frame Bits - QP Y PSNR (dB) U PSNR (dB) V PSNR (dB) enc.txt Summary report Bitstream size -Bitrate (bpf, bps) - Encoding time (us) PSNR (Overall/Avg /Y/U/V) (db) dec.txt Decoding time

26. 26 26 LAB1 RUN ENCODEING & DECODING EXAMPLE

27. Agenda 27 Software Demonstration Lab1 Test Conditions and Coding Results Lab2 Performance Comparison Between Different SpeedSteps Lab3

28. Test Conditions 28 Common Test Platform Libvpx-1.3.0 Quantization Parameters 17, 25, 33, 41 Sequences Resolution Sequence Name Frame Rate (Hz) Color Format 2560x1600 Traffic 30 YUV 4:2:0 1920x1080 Kimono1 24

29. Arrange Coding Results 29 Sample Excel Template ./template.xlsm Working Sheets Summary YUV : performance summary of YUV sequences Plot : rate psnr curves of anchor and test bitstream Results: per sequence coding results w/ various tiers

30. Working Sheets: AI, LP 30 Coding results of anchor bitstream Coding results of tested bitstream QP value Color fromat Sequence name Bit rates Y, U, V PSNR Encoding & Decoding times (second) Encoding time (hour) Cells marked in cyan should all be filled, and then BD rate will be computed automatically Contents in other working sheets will be generated automatically once the AI, LP are all done

31. Working Sheet: SummaryYUV 31 Ratio of encoding time between test s & anchor s results Ratio of decoding time between test s & anchor s results Averaged BD Rate over all RGB sequences

32. 32 32 LAB2 -FILL ENCODER S & DECODER S REPORTS INTO A EXCEL TEMPLATE (SPEEDSTEP 0)

33. Agenda 33 Software Demonstration Lab1 Test Conditions and Coding Results Lab2 Performance Comparison Between Different SpeedSteps Lab3

34. Coding Structure Setting 34 SET SpeedStep=###the encode speed (values from 0 to 5)### Speed steps are set through the --cpu-used parameter (values from 0 to 5) Setting--good quality and --cpu-used=0 will give quality that is usually very close to and even sometimes better than that obtained with --best but the encoder will typically run about twice as fast Setting--cpu-used=1 or --cpu-used=2 will give further significant boosts to encode Setting a value of 4 or 5 will turn off "rate distortion optimisation" which has a big impact on quality, but also greatly speeds up the encoderspeed, but will start to have a more noticeable impact on quality and may also start to effect the accuracy of the data rate control.

35. 35 35 LAB3 -FILL ENCODER S & DECODER S REPORTS INTO A EXCEL TEMPLATE (SPEEDSTEP 5)