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  1. Member
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    Hi.

    Is there any program that i can reduce any mkv file reference frames WITHOUT loose any of the mkv video quality?

    A LOT OF THANKS.
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  2. DECEASED
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    Nope.

    Because the quantity of *reference frames* is a property of a H.264 video stream.

    MKV is just a container in which a video/audio/subtitle stream can be wrapped.

    http://en.wikipedia.org/wiki/Digital_container_format
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    How you can be so sure that there ISN'T any way to reduce the reference frames of an mkv file?
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    Originally Posted by fits79 View Post
    How you can be so sure that there ISN'T any way to reduce the reference frames of an mkv file?


    WITHOUT re-compressing the video stream,
    and therefore WITHOUT losing quality,

    that's NOT possible.
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  5. How you can be so sure that there ISN'T any way to reduce the reference frames of an mkv file?
    I hope, you are also pretty sure by now.
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  6. Originally Posted by fits79 View Post
    How you can be so sure that there ISN'T any way to reduce the reference frames of an mkv file?
    Read up on how inter-frame codecs work and it will become obvious to you.
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    How i do that?
    And isn't there any quick program that i can reduce these re-frames?
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  8. I'm a Super Moderator johns0's Avatar
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    Use uncropmkv or handbrake,you have to re-encode to reduce reference frames.
    I think,therefore i am a hamster.
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    Isn't there any QUICK program that doesn't need re-encoding because at the netbook i use it take TOOOOOOO LONG to re-encode the complete movie.
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  10. I'm a Super Moderator johns0's Avatar
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    Nope,you have to re-encode to reduce reference frames,you can ask as many times as you want but there's no other way,RE-ENCODE!.
    I think,therefore i am a hamster.
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  11. Handbrake's Normal preset is about as fast as it gets.
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  12. Originally Posted by fits79 View Post
    Originally Posted by jagabo View Post
    Read up on how inter-frame codecs work and it will become obvious to you.
    How i do that?
    https://en.wikipedia.org/wiki/Video_compression#Encoding_theory
    https://en.wikipedia.org/wiki/Reference_frame_%28video%29
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    How i can find out which is the reference frames level by these specs:
    SOURCE TYPE.....: Bluray
    ViDEO BiTRATE...: x264 L4.1 High @ 8087 kbps
    RESOLUTiON......: 1280 x 534
    FRAME RATE......: 23.976
    RUNTiME.........: 2:03:00.373 (h:m.ms)
    AUDiO...........: Engish Dolby Digital 5.1 @ 640 kbps
    SUBTiTLE........: English
    iMDB............: http://www.imdb.com/title/tt1583421
    Ratings.........: 6.0/10 from 45,857 users


    ----------X264 iNFO------------

    x264 [info]: frame I:1873 Avg QP:15.36 size:147913
    x264 [info]: frame P:44303 Avg QP:17.83 size: 62281
    x264 [info]: frame B:130776 Avg QP:19.46 size: 33834
    x264 [info]: consecutive B-frames: 4.5% 5.3% 12.8% 19.8% 15.6% 30.9% 6.1% 2.8% 2.2%
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  14. I'm a Super Moderator johns0's Avatar
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    Use mediainfo to show the r frames.Just rip your G.I. Joe: Retaliation again and encode it it with lower r frames such 3-5.

    I think,therefore i am a hamster.
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    I don't have the file and i want to know how i can find based on that number the reference frames.
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  16. Originally Posted by fits79 View Post
    How i can find out which is the reference frames level by these specs:
    SOURCE TYPE.....: Bluray
    ViDEO BiTRATE...: x264 L4.1 High @ 8087 kbps
    RESOLUTiON......: 1280 x 534
    FRAME RATE......: 23.976
    RUNTiME.........: 2:03:00.373 (h:m.ms)
    AUDiO...........: Engish Dolby Digital 5.1 @ 640 kbps
    SUBTiTLE........: English
    iMDB............: http://www.imdb.com/title/tt1583421
    Ratings.........: 6.0/10 from 45,857 users


    ----------X264 iNFO------------

    x264 [info]: frame I:1873 Avg QP:15.36 size:147913
    x264 [info]: frame P:44303 Avg QP:17.83 size: 62281
    x264 [info]: frame B:130776 Avg QP:19.46 size: 33834
    x264 [info]: consecutive B-frames: 4.5% 5.3% 12.8% 19.8% 15.6% 30.9% 6.1% 2.8% 2.2%
    In theory L4.1 should limit the reference frames to Blu-ray compatibility:

    http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC#Levels

    But since you aren't using a Blu-ray standard frame size I wouldn't count on that working correctly. And keep in mind, the level is only a number in the header. Anybody can put whatever they want there. It doesn't necessarily reflect the properties of the video.

    You have way to many consecutive b-frames for Blu-ray.
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  17. Member
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    Originally Posted by fits79 View Post
    How i can find out which is the reference frames level by these specs:
    SOURCE TYPE.....: Bluray
    ViDEO BiTRATE...: x264 L4.1 High @ 8087 kbps
    RESOLUTiON......: 1280 x 534
    FRAME RATE......: 23.976
    RUNTiME.........: 2:03:00.373 (h:m.ms)
    AUDiO...........: Engish Dolby Digital 5.1 @ 640 kbps
    SUBTiTLE........: English
    iMDB............: http://www.imdb.com/title/tt1583421
    Ratings.........: 6.0/10 from 45,857 users


    ----------X264 iNFO------------

    x264 [info]: frame I:1873 Avg QP:15.36 size:147913
    x264 [info]: frame P:44303 Avg QP:17.83 size: 62281
    x264 [info]: frame B:130776 Avg QP:19.46 size: 33834
    x264 [info]: consecutive B-frames: 4.5% 5.3% 12.8% 19.8% 15.6% 30.9% 6.1% 2.8% 2.2%
    While I'm not as anti warez as some people here, you should stop claiming it's your blu ray you're talking about here. Any reasonably knowledgeable user could read the above and see it's torrented.

    And fast encoding with a netbook? Sorry, but that's impossible. Video encoders are actually pretty mature technology. No magic bullet there.

    However, since apparently you won't listen to anything that isn't what you want to hear, and you refuse to believe there isn't a simple solution to a complex task, that's all I'm going to have to say on the subject.
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