Starting with 2.2.5-beta2 my set top box file list (.ts and .trp files) shows many grey thumbnails instead of a correct thumbnail pic. There are good thumbnails but many are grey. I can systematically reproduce this. The video file playback is okay.
Older versions of Air Video server do not have this problem. I've compared the thumbnail logs of 2.2.5 beta1 and beta2 for such grey thumbnails and the logs are 100% identical, so it seems ffmpeg is not causing the problem. The question is what is causing this and can you please fix it?
Here is a thumbnail log entry created by 2.2.5-beta2: