[Cin] MKV containers

Terje J Hanssen terje at nordland-teknikk.no
Sat Feb 9 18:59:03 CET 2019

As already mentioned, GOP values can be found also with Mediainfo. Here some extracted samples among my video files:

Pixel-3 recorded:
mediainfo HD_H264_VID_20181218_131437.mp4 | grep GOP
Format settings, GOP                     : M=1, N=60

mediainfo hdv01.m2t  | grep GOP
Format settings, GOP                     : M=3, N=12

mediainfo SD-BD_x264.m2ts | grep GOP
Format settings, GOP                     : M=4, N=24

mediainfo HDV-BD_m2t_ac3.m2ts  | grep GOP
Format settings, GOP                     : M=3, N=12

Possibly slow playback can be related to old Cinelerra GOP issues, i.e. among these posts on the old list?


Den 09.02.2019 11:39, skrev Igor BEGHETTO:
What I know, to NLEs don't like great value GOP because the I-frame are very distance.
I-frames (Intra frames) contains all the information of the image, P-frames (Predicted frames) and B-frames (Bidirectional predicted frames) not. Greater GOP value is, smaller file size is (it is good for streaming and delivery); smaller GOP value is, greater file size is and more I-frames there are and then it is good for editing video. With more i-frames cpu consumes less because decode less information. For video archive would be better GOP=1 (all i-frames)
Sorry, I guess, you always know that.

However, you have a i7 cpu with a lot of RAM, then your PC should process your video very good, I think.
Have you tried to use Proxy with scale value to 1/2, just for testing? If Proxy with "mpeg" you do, the GOP value is 12, then could be very useful.
(I think, I am writing like Joda Jedi speak) ;-)


Il 08/02/2019 23.41, Andrea paz ha scritto:

Thanks for the script.
Max GOP = 250

Meldingsteksten vil bli nedlastet etter behov.

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