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  1. Hello and happy new year.

    I have a problem with an mkv file, 1080p, that has chroma subsampling 4.2.2 and I can't play it (it freezes all the time).
    I learned that BLurays and usually video files have 4.2.0 that's why I have no problem with them.
    But 4.2.2 needs more power.
    Unfortunately I have 3GB RAM.
    I assume it needs more, right?

    Could i do something in software preferences that could help?
    I use MPC with MadVR. (same problem with EVR custom pres. and VLC)
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  2. On PC chroma sampling should be not a problem i hope.
    LAV Filters can help. Ffplay (ffmpeg) can play almost everything sensible.
    MPC-HC use LAV Filters directly.
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  3. I use LAV filters, but nothing..
    Last edited by thinredline; 30th Dec 2014 at 11:55.
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  4. 422 requires marginally more decoding power

    VLC or ffplay should be able to play it, but you said VLC couldn't . That suggests problem with the file, or your computer

    What are your computer specs?

    What are file specs? use mediainfo (view=>text)
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  5. Originally Posted by poisondeathray View Post
    422 requires marginally more decoding power

    VLC or ffplay should be able to play it, but you said VLC couldn't . That suggests problem with the file, or your computer

    What are your computer specs?

    What are file specs? use mediainfo (view=>text)
    Thank you for your reply.
    The file doesn't have any problem because many people have played it perfectly fine.
    One else had a problem and they said that 4.2.2 needs more power.
    When i play the file, CPU goes up to 100%, that's why it freezes.

    I have Windows 7 64bit, 3GB RAM, Nvidia Geforce GT 220.
    But I do have little space left in the hard disc where Windows are. Could it be that? (although i can playback another file of same size [20GB] fine but that has 4.2.0)
    There are 7,5GB left only .
    The file itself is in an external hard drive.
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  6. Originally Posted by thinredline View Post
    Originally Posted by poisondeathray View Post
    422 requires marginally more decoding power

    VLC or ffplay should be able to play it, but you said VLC couldn't . That suggests problem with the file, or your computer

    What are your computer specs?

    What are file specs? use mediainfo (view=>text)
    Thank you for your reply.
    The file doesn't have any problem because many people have played it perfectly fine.
    One else had a problem and they said that 4.2.2 needs more power.
    When i play the file, CPU goes up to 100%, that's why it freezes.

    I have Windows 7 64bit, 3GB RAM, Nvidia Geforce GT 220.
    But I do have little space left in the hard disc where Windows are. Could it be that?
    There are 7,5GB left only .
    The file itself is in an external hard drive.
    No , free HDD space won't affect it

    Please answer the questions.

    Post the mediainfo report

    What are the processor specs ?
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  7. Oh, forgot my processor specs. (and i was thinking that I forgot something).
    I have Intel Pentium Dual Core 3.2GHz.

    the file's report:

    General
    Format : Matroska
    Format version : Version 4 / Version 2
    File size : 22.3 GiB
    Duration : 2h 4mn
    Overall bit rate : 25.5 Mbps
    Encoded date : UTC 2014-12-25 02:19:32
    Writing application : mkvmerge v7.3.0 ('Nouages') 64bit built on Oct 22 2014 18:53:34
    Writing library : Lavf56.9.100
    DURATION : 02:04:53.619000000
    NUMBER_OF_FRAMES : 239796
    NUMBER_OF_BYTES : 1438774768
    _STATISTICS_WRITING_APP : mkvmerge v7.3.0 ('Nouages') 64bit built on Oct 22 2014 18:53:34
    _STATISTICS_WRITING_DATE_UTC : 2014-12-25 02:19:32
    _STATISTICS_TAGS : BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES

    Video
    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : High 4:2:2@L4.0
    Format settings, CABAC : Yes
    Format settings, ReFrames : 4 frames
    Codec ID : V_MPEG4/ISO/AVC
    Duration : 2h 4mn
    Nominal bit rate : 24.0 Mbps
    Width : 1 920 pixels
    Height : 1 080 pixels
    Display aspect ratio : 16:9
    Frame rate mode : Variable
    Frame rate : 23.976 fps
    Color space : YUV
    Chroma subsampling : 4:2:2
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.483
    Writing library : x264 core 142 r2479 dd79a61
    Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=9 / psy=1 / psy_rd=1.00:0.00 / 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=24 / lookahead_threads=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=16 / 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=24000 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
    Language : English
    Default : Yes
    Forced : No
    DURATION : 02:04:53.619000000
    NUMBER_OF_FRAMES : 179667
    NUMBER_OF_BYTES : 22478845422
    _STATISTICS_WRITING_APP : mkvmerge v7.3.0 ('Nouages') 64bit built on Oct 22 2014 18:53:34
    _STATISTICS_WRITING_DATE_UTC : 2014-12-25 02:19:32
    _STATISTICS_TAGS : BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES

    Audio
    ID : 2
    Format : PCM
    Codec ID : A_PCM/INT/LIT
    Duration : 2h 4mn
    Bit rate mode : Constant
    Channel(s) : 2 channels
    Sampling rate : 48.0 KHz
    Bit depth : 16 bits
    Delay relative to video : -83ms
    Language : English
    Default : Yes
    Forced : No
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  8. Member Cornucopia's Avatar
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    Frickin' Variable Frame Rate again (in addition to the 4:2:2). Some wiseguy has given you a file that is Un-professional Professional.

    Use ffmpeg or AVISynth/Vdub to convert it back to CFR, while also converting it to 4:2:0. Then play the result.

    Scott
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  9. I'm afraid I'm a novice in these things.
    Does this procedure you mention involve re-encoding?
    Because I don't like re-encoding since I may lose quality.
    I was hoping that I could change a preference in LAV video options or madVR to handle the file..

    by the way, do you know why I can't play it right, but almost all people can play it without any problems?
    Do i need more RAM?
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  10. It does play, right ? Only choppy ?

    You probably need a faster CPU . What model of "pentium dual core" specifically ?

    4:2:2 isn't accelerated by GPU decoding, only 4:2:0, so you can't off load the work done by the CPU
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  11. Originally Posted by poisondeathray View Post
    It does play, right ? Only choppy ?

    You probably need a faster CPU . What model of "pentium dual core" specifically ?

    4:2:2 isn't accelerated by GPU decoding, only 4:2:0, so you can't off load the work done by the CPU

    Yes, it does play but it freezes constantly.
    hmm .. model? you mean the Intel? I'm not sure what more info I can provide.
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  12. You can use cpu-z for more processor information, post a screenshot

    I'm guessing it's a very old or slow dual core, barely capable of playing 1080p with software, hence the "freezing". The other 4:2:0 videos can be assisted with GPU acceleration. I'm guessing the "other people" have faster/newer computers
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  13. here you are:

    Click image for larger version

Name:	cpu.png
Views:	468
Size:	46.3 KB
ID:	29378

    I'm perfectly fine with any other 1080p content and Blurays..
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  14. Fine with blu-ray and 1080p software decoding, or GPU assisted like DXVA ?

    It's probably borderline for pure CPU decoding, since it's a 8-9 year old part
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  15. Oh, I believe it's GPU assisted.

    when i play an mkv file i use MPC with Nvidia CUVID in LAV options.
    and when I play a BLuay I use PowerDVD with "enable Hardware acceleration"..
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  16. Member Cornucopia's Avatar
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    That's why pdr said: "4:2:2 isn't accelerated by GPU decoding, only 4:2:0, so you can't off load the work done by the CPU ".
    Your pc can handle 4:2:0 AVC, etc. because it's not actually your PC that is handling it, it's the GPU. But your GPU wasn't designed to handle 4:2:2, so the PC HAS to try to handle it, and it is now showing its shortcomings.

    Scott
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  17. If you disable GPU acceleration when playing back a "normal" 4:2:0 file, and CPU usage jumps close to 100%, then that suggests CPU is the problem

    Then the options are to re-encode this file to 4:2:0, or update your hardware
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  18. I disabled CUVID in LAV, and again regular 1080p files play OK. It freezes a bit when i pause and start playback again, but after some seconds it goes well...
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  19. I think it's borderline, that you don't get smooth playback with CPU only.

    You can try another player, maybe potplayer, smplayer, splash - they might be slightly faster that it's enough for you to play smoothly

    Or re-encode the file, or update your hardware
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