Key frame editing?

[vato76]

Hello. I have a movie in mkv format that i want to edit. But the key frames or intra frames (scene-breaks) do not appear between scenes as they should. No matter what format i edit it in or convert it to, or what codec i encode it with, the scene breaks are always in the same uniform 10-15 second points instead of at scene changes like most other movies im used to editing with. Is it the source file's fault or is there any way i can fix it? Any help is appreciated. Below are the source files specs.

Format : Matroska
File size : 5.67 GiB
Duration : 2h 3mn
Overall bit rate : 6 547 Kbps
Encoded date : UTC 2011-05-26 08:16:22
Writing application : mkvmerge v4.4.0 ('Die Wiederkehr') built on Oct 31 2010 21:52:48
Writing library : libebml v1.0.0 + libmatroska v1.0.0

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 12 frames
Muxing mode : Container profile=Unknown@4.1
Codec ID : V_MPEG4/ISO/AVC
Duration : 2h 3mn
Bit rate : 4 906 Kbps
Nominal bit rate : 5 041 Kbps
Width : 1 280 pixels
Height : 542 pixels
Display aspect ratio : 2.35:1
Frame rate : 23.976 fps
Resolution : 8 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.295
Stream size : 4.24 GiB (75%)
Title : Notting.Hill.1999.BluRay.720p.DTS.2Audio.x264-CHD
Writing library : x264 core 104 r1703 cd21d05
Encoding settings : cabac=1 / ref=12 / deblock=1:-3:-3 / analyse=0x3:0x113 / me=umh / subme=9 / psy=1 / psy_rd=1.05:0.10 / mixed_ref=1 / me_range=32 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=12 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=6 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=5041 / ratetol=1.0 / qcomp=0.70 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=50000 / vbv_bufsize=50000 / ip_ratio=1.40 / aq=1:0.70 / nal_hrd=none

Audio
ID : 2
Format : DTS
Format/Info : Digital Theater Systems
Codec ID : A_DTS
Duration : 2h 3mn
Bit rate mode : Constant
Bit rate : 1 510 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Surround: L R, LFE
Sampling rate : 48.0 KHz
Resolution : 24 bits
Stream size : 1.31 GiB (23%)
Title : DTS-HDMA core 5.1CH 1509kbps

[vato76]

Is there anything that can change the key frame placement in a file?

[guns1inger]

Re-encoding. You are working with formats that are not designed for editing.

You could try AVI Demux and see if it's smart encoding will work for MKV files. If so, the re-encoding will be minimal. Otherwise, cut where you like and re-encode the lot.

[ARTO65]

Well, key frames are where the encoder put them, it doesn't necessarily is between two scenes.
If what you want to do is split a big file into smaller chunks, SolveigMM Avi trimmer + MKV or Mkvmerge are your best bets.