How to detect I, P and B-frames in mpeg2?

[ronnylov]

I would like to know if there is a utility that can tell me if the decoded frame is a I-frame, P-frame or a B-frame. I am comparing encoded mpeg2 clips with ssim in avisynth and would like to separate the quality numbers for each frame type. Can it be read out from the d2v file or can I scan the mpeg2 stream and log frame types to a text file somehow?

[oof]

Well, Vdub knows . Is that sufficient ?

[Kika]

If you need only the Information, mme can handle this.

[ronnylov]

I tried virtualdubmod and I could see the frame type of the displayed frame. But I could not export to a log. I would like something like this for the whole movie:

Frame Type
0 I
1 B
2 B
3 P
4 B
5 B
6 P
7 B
8 B
9 P
10 B
11 B
12 I
....

Kika: What is mme?

[Kika]

mme is an MPEG2-Decoder-Plugin for TMPGEnc and an Stand-alone-Decoder.

It also has the ability to cut Movies, but that function is buggy.

http://www.marumo.ne.jp/mpeg2/m2v_vfp-0.6.43.lzh

[ronnylov]

Thanks!

[oof]

If you have a C compiler you could get the
source for Pulldown and modfy it. It already has
printf statements for most fields

[ChristianHJW]

spyder from the matroska team has been spending month now to get a nice MPEG demuxer and to find out about frame types and frame references ( we need this for MPEG1/2 muxing into matroska ). His code is C and GPL, you can talk to him either via email

spyder AT matroska.org

or occasionally on irc.corecodec.com #matroska ( you have to be patient, he is not there very often ) ....

[ronnylov]

It seems that the commersial version of BitrateWiever can export information of GOPs to spreadsheet format. I beleive this is something I can use for my purpose. I will buy it and see what I can do.