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  1. Member
    Join Date
    Aug 2009
    Location
    Guatemala
    Search Comp PM
    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
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  2. Member
    Join Date
    Aug 2009
    Location
    Guatemala
    Search Comp PM
    Is there anything that can change the key frame placement in a file?
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  3. Always Watching guns1inger's Avatar
    Join Date
    Apr 2004
    Location
    Miskatonic U
    Search Comp PM
    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.
    Read my blog here.
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  4. 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.
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