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  1. Hello, I'm trying to encode using a very specific version of x264, and compare encodes with other versions.

    x264 core 80 r1376M 3feaec2

    I found the source but not a compiled version, and I'm not able to compile it.


    I'm trying to recreate an old encode as close as possible but newer versions add more options, the purpose of this is to get some compatibility with an old device.
    With the current test encode I'm losing some speed with 29.97 fps, I want to know if using this old version may make it easier to decode.
    If someone can explain to me that older versions aren't really easier to decode, then that would save me some time.

    Basically the old encode plays perfectly but my recreation has some slowdown, the clear difference I see is that my encode has some extra settings and is a recent x264.
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  2. older versions aren't really easier to decode. If you have an old encode that appears to play more smoothly, the difference is likely in the setting used

    You can make an encoder easier to decode by adding --tune fastdecode . You can also use VBV settings and bitrate ranges appropriate for your target device
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  3. Dinosaur Supervisor KarMa's Avatar
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    Maybe you can post the mediainfo of the video that plays well, and then the mediainfo of the video that plays worse. You obviously have the mediainfo as you are asking for a specific x264 version. Using an older version won't really help you out.
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  4. OK

    Source video:
    x264 - core 80 r1376M 3feaec2 - H.264/MPEG-4 AVC codec - Copyleft 2003-2009 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=umh subme=6 psy=1 psy_rd=1.0:0.0 mixed_ref=1 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=-2 threads=3 sliced_threads=0 nr=0 decimate=1 mbaff=0 constrained_intra=0 bframes=0 wpredp=0 keyint=48 keyint_min=25 scenecut=0 rc_lookahead=48 rc=2pass mbtree=1 bitrate=1350 ratetol=1.0 qcomp=0.50 qpmin=8 qpmax=51 qpstep=4 cplxblur=20.0 qblur=0.5 vbv_maxrate=2025 vbv_bufsize=2700 ip_ratio=1.40 aq=1:1.00
    Mine:
    x264 - core 142 r2479 dd79a61 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=umh subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=-4 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=48 keyint_min=25 scenecut=0 intra_refresh=0 rc_lookahead=48 rc=2pass mbtree=1 bitrate=1350 ratetol=1.0 qcomp=0.50 qpmin=8 qpmax=51 qpstep=4 cplxblur=20.0 qblur=0.5 vbv_maxrate=2025 vbv_bufsize=2700 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
    I did set chroma_qp_offset=-2, I don't know why it uses -4 instead, I'm using HandBrake's advanced tab to encode.
    Last edited by xAlienxx; 26th Jul 2016 at 19:05.
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  5. --chroma-qp-offset won't make a difference for playback

    What about other processing differences? For example handbrake and VFR, IVTCing ,etc... Post the full mediainfo , not just the encoding settings

    What is the source ?

    What device is it ?

    How does the "new" file playback on a computer?
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