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  1. 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

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    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!
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  2. DECEASED
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    Last edited by El Heggunte; 30th Dec 2015 at 11:26. Reason: the other answers are better :- /
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  3. Look at the Base Key description in GSpot.

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    An s-frame is an MPEG 4 ASP p-frame with GMC.
    https://en.wikipedia.org/wiki/Global_motion_compensation
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  4. use ffprobe:

    Code:
    @ffprobe -select_streams v -i %1 -show_frames -pretty -print_format json -of json > %1_frames_v.json
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  5. Originally Posted by pandy View Post
    use ffprobe:

    Code:
    @ffprobe -select_streams v -i %1 -show_frames -pretty -print_format json -of json > %1_frames_v.json
    Thank you pandy, that did it.
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