user22241: I encoded two videos (ParkJoy and Sintel) in FFMPEG by H.264 with same parameters (GOP size, QP, frame rate, resolution etc.) and obtained rate-distortion plots (mean PSNR of Y channel vs bitrate). I am trying to understand the possible causes for the difference between those two plots; although they have the same resolution, GOP size etc.. The plots that I obtained are given in the following links, and any help would be appreciated.



user14523: The difference in the content of the two samples could explain the different performance of the codec. A given configuration of a codec might perform well for a static shot but not perform well for fast motion. At higher bit rates, the effects of codec settings are usually less noticeable.

22241: <p>I encoded two videos (ParkJoy and Sintel) in FFMPEG by H.264 with same parameters (GOP size, QP, frame rate, resolution etc.) and obtained rate-distortion plots (mean PSNR of Y channel vs bitrate). I am trying to understand the possible causes for the difference between those two plots; although they have the same resolution, GOP size etc.. The plots that I obtained are given in the following links, and any help would be appreciated.
<a href="https://i.stack.imgur.com/CysLR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CysLR.png" alt="Figure 1"></a></p>

<p><a href="https://i.stack.imgur.com/VFGrY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VFGrY.png" alt="Figure 2"></a></p>
 14523: <p>The difference in the content of the two samples could explain the different performance of the codec. A given configuration of a codec might perform well for a static shot but not perform well for fast motion. At higher bit rates, the effects of codec settings are usually less noticeable.</p>
