Software for GOP structure analysis (not necessarily a player!)

[JoãoRatão]

Hello guys,
I've been working with video in format MPEG2 OP1a, 25fps, long GOP, and I've been trying to find a software that allows me to see the type of each frame in the video (I, P or B). So far I've come across MPEG Validator, GSpot and DVBinspector, among others, but they don't support this format. The only one that return some results was GSpot, that output this



where I have have no interpretation for the purple frames. GSpot calls them S-frames, but I have never heard about that.

Does anyone has any suggestion about a more recent software that can analyze GOP structure? It would be best if it was free, but it can also be a trial version since I only need to use for a few days.

Thank you!

[JoãoRatão]

I changed this to the topic "Software Playing".
Admin, please close this thread.