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  1. Hi all,
    I made several BluRay backups by MakeMKV and converted it to x265 using AVIDemux - works perfect, very smooth.

    Once I realized one disk backup is almost unwatchable, while it jitters very much using same x265 presets (checked several times).
    I realized that only difference is, the jittering souce video in MKV made by MakeMKV is coded by VC1 codec. None of those 10-15 that works is coded by VC1.

    When I just play directly the "original" not-reencoded file (MKV or AVI with VC1) it plays ok. In time I pass it through AVIdemux with same X265 preferences, the output jitters.


    For experiments I created just very small part of the movie as AVI (AVI itself is played ok, MediaINFO log attached). But no success with x265 conversion..

    I also tried to force FPS (Resample FPS filter of AVI demux).
    A have not changed any x265 settings while I must say am not aware of what it does. I am using just simple the non advanced setup:
    Preset: medium
    Tuning: psnr
    Profile: main
    IDC level: auto
    Pool, Frame threads: auto
    Encoding mode: CRF
    Quality: 17

    Any help is highly appreciated. Thank you in advance.
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  2. Member
    Join Date
    Mar 2008
    Location
    United States
    Search Comp PM
    That output is almost unintelligible. Use this mediainfo to analyze the file, put it it text view,
    copy and paste the info here directly
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  3. OK, here it is, thank you:
    General
    Complete name : Cliffhanger_pokus.avi
    Format : AVI
    Format/Info : Audio Video Interleave
    File size : 445 MiB
    Duration : 2 min 23 s
    Overall bit rate : 26.0 Mb/s

    Video
    ID : 0
    Format : VC-1
    Codec ID : WVC1
    Codec ID/Hint : Microsoft
    Duration : 2 min 23 s
    Bit rate : 21.4 Mb/s
    Width : 1 920 pixels
    Height : 1 080 pixels
    Display aspect ratio : 16:9
    Frame rate : 23.976 (24000/1001) FPS
    Bit depth : 8 bits
    Compression mode : Lossy
    Bits/(Pixel*Frame) : 0.430
    Stream size : 366 MiB (82%)

    Audio #1
    ID : 1
    Format : DTS
    Format/Info : Digital Theater Systems
    Codec ID : 2001
    Codec ID/Info : Digital Theater Systems
    Duration : 2 min 21 s
    Bit rate mode : Constant
    Bit rate : 1 509 kb/s
    Channel(s) : 6 channels
    Channel layout : C L R Ls Rs LFE
    Sampling rate : 48.0 kHz
    Frame rate : 93.750 FPS (512 SPF)
    Bit depth : 16 bits
    Compression mode : Lossy
    Stream size : 25.8 MiB (6%)
    Alignment : Aligned on interleaves
    Interleave, duration : 11 ms (0.26 video frame)

    Audio #2
    ID : 2
    Format : DTS
    Format/Info : Digital Theater Systems
    Codec ID : 2001
    Codec ID/Info : Digital Theater Systems
    Duration : 2 min 21 s
    Bit rate mode : Constant
    Bit rate : 1 509 kb/s
    Channel(s) : 6 channels
    Channel layout : C L R Ls Rs LFE
    Sampling rate : 48.0 kHz
    Frame rate : 93.750 FPS (512 SPF)
    Bit depth : 16 bits
    Compression mode : Lossy
    Stream size : 25.8 MiB (6%)
    Alignment : Aligned on interleaves
    Interleave, duration : 11 ms (0.26 video frame)

    Audio #3
    ID : 3
    Format : DTS
    Format/Info : Digital Theater Systems
    Codec ID : 2001
    Codec ID/Info : Digital Theater Systems
    Duration : 2 min 21 s
    Bit rate mode : Constant
    Bit rate : 1 509 kb/s
    Channel(s) : 6 channels
    Channel layout : C L R Ls Rs LFE
    Sampling rate : 48.0 kHz
    Frame rate : 93.750 FPS (512 SPF)
    Bit depth : 24 bits
    Compression mode : Lossy
    Stream size : 25.8 MiB (6%)
    Alignment : Aligned on interleaves
    Interleave, duration : 11 ms (0.26 video frame)
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  4. libav has probably some problem with it and like your player you probably need a decoder during conversion which uses a hardware decoder.
    (as a side note: wrapping newer formats which use b-frames and I- frames that do not have to be key frames inside an avi container is a good way to run into problems; dts inside .avi is also a bad idea, same as putting .aac in it,..)

    Cu Selur
    users currently on my ignore list: deadrats, Stears555
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  5. DECEASED
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    Location
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    Search Comp PM
    Originally Posted by Selur View Post
    libav has probably some problem with it and like your player you probably need a decoder during conversion which uses a hardware decoder.
    (as a side note: wrapping newer formats which use b-frames and I- frames that do not have to be key frames inside an avi container is a good way to run into problems; dts inside .avi is also a bad idea, same as putting .aac in it,..)
    I won't deny that the file of the OP may be problematic, but please stop spreading nonsense about VC-1.
    MKVmerge itself uses the VfW-compatibility mode to store VC-1 in Matroska. And DTS's DCA format uses strictly-constant bitrate, so it requires no special tricks to be stored in the AVI container.
    Last edited by El Heggunte; 14th Dec 2019 at 08:19. Reason: damn typos
    "Programmers are human-shaped machines that transform alcohol into bugs."
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  6. Hi,
    so thank you very much for the idea of having troubles with decoding the original video. I found out that it is not possible to change or parametrize the AVIDemux decoder, so I tried just HandBrake in place of AVIDemux with default settings and: IT WORKED!
    Thanks again, no jitters now.
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