说明：  Evalvid是一个对在真实或模拟的网络里传输的视频进行质量评价的框架和工具集。除了底层网络的QoS参数的测量，如丢包率，延迟，抖动，Evalvid还提供标准的视频质量评价算法如PSNR和SSIM。它视频编码方面支持H.264，MPEG-4和H.263。音频编码方面支持AAC。
(Evalvid is one pair in real or simulated network in the transmission of video quality assessment framework and toolset. In addition to measuring the underlying network QoS parameters such as packet loss, delay, jitter, Evalvid also provides standard video quality assessment algorithms such as PSNR and SSIM. It supports video encoding H.264, MPEG-4 and H.263. Audio coding support AAC.)