NS2 EvalVid

Implementing EvalVid Projects using NS2 Simulation Framework

Why NS2 is the Best Choice for Evalvid Framework?

EvalVid Tool can only compare and evaluate videos with equal number of frames. For this reason, the tool can’t evaluate videos with issues other than freeze.Whereas Ns2 simulation Framework can Evaluate and compare Videos with any frames.Evalvid is targeted for researchers who want to evaluate their network designs or setups in terms of user perceived video quality.Ns2 Simulation Framework is the Best for EvalVid Framework due to its simplicity and flexibility,

 

Statistical measure using NS2 Evalvid:

  • Calculate PSNR and/or MOS (decoded media compared to original media).
  • Loss rate statistics.
  • Decoding of erroneous compressed media.
  • Playing decoded media.
  • Delay statistics.
  • Assembly of received compressed media taking packet loss and/or delay into account.

 

NS2 EvalVid Framework

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Features of Evalvid:

  • Generate received video in compressed format (MPEG4) from receiver trace file and the original video.
  • Decode compressed video into YUV format.
  • Compute PSNR.

 

Sample code for ns2 Evalvid:


while {[eof $original_file_id0] == 0} {

    gets $original_file_id0 current_line

    scan $current_line "%d%s%d%s%s%s%d%s" no_ frametype_ length_ tmp1_ tmp2_
tmp3_ tmp4_ tmp5_

    #puts "$no_ $frametype_ $length_ $tmp1_ $tmp2_ $tmp3_ $tmp4_ $tmp5_"


    # 30 frames/sec. if one want to generate 25 frames/sec, one can use set
time [expr 1000*1000/25]

    set time [expr 1000 * 1000/30]



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