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  1. Member
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    Hello,

    The video files I have are already converted to H.264 10bit 1920x1080 (Please find the source video file details below). I would like to reduce to file size using Vidcoder. My only concern is reducing the file size. I use 16 for quality settings and left all settings as same as source. So, I think only changing to HEVC 10 bit will reduce to size without effecting the quality too much. . I use HQ video settings with Profile Automatic and Level 5.0:

    1st convert: using H.265 10 bit (Intel QSV). QSV decoding option checked also.
    2dd convert: using H.265 10 bit (Intel QSV). QSV decoding option unchecked.
    3rd convert: using H.265 10 bit (x265). QSV decoding option checked.
    4th convert: using H.265 10 bit (x265). QSV decoding option unchecked.

    All of them gives me the more reddish picture (attached). Is this a problem or, HEVC codec should like that and it is normal, so this picture is ok?. If it is a problem, is it related to HEVC, Intel QSV option or 10 bit. This problem not occur when I converted to H.264.
    I used latest stable release portable and beta 6.0 portable of Vidcoder.
    Thank you.

    Video File Details:
    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : High 4:4:4 Predictive@L5
    Format settings : CABAC / 5 Ref Frames
    Format settings, CABAC : Yes
    Format settings, Reference frames : 5 frames
    Codec ID : V_MPEG4/ISO/AVC
    Duration : 43 min 52 s
    Bit rate : 6 610 kb/s
    Width : 1 920 pixels
    Height : 1 080 pixels
    Display aspect ratio : 16:9
    Frame rate mode : Constant
    Frame rate : 59.940 (60000/1001) FPS
    Color space : YUV
    Chroma subsampling : 4:4:4
    Bit depth : 10 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.053
    Stream size : 2.03 GiB (77%)
    Title : Babylon 5 S1E01
    Writing library : x264 core 142 r2479kMod dd79a61
    Encoding settings : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x113 / me=umh / subme=8 / psy=1 / fade_compensate=0.00 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=4 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / fgo=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=17.0000 / qcomp=0.60 / qpmin=0 / qpmax=81 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
    Language : English
    Default : Yes
    Forced : No
    Color range : Limited
    Color primaries : BT.2020
    Transfer characteristics : BT.2020 (10-bit)
    Matrix coefficients : BT.2020 non-constant
    Image Attached Thumbnails Click image for larger version

Name:	X264_1.png
Views:	24
Size:	2.38 MB
ID:	51254  

    Click image for larger version

Name:	X264_2.png
Views:	37
Size:	2.25 MB
ID:	51255  

    Click image for larger version

Name:	HEVC_2.png
Views:	28
Size:	1.92 MB
ID:	51256  

    Click image for larger version

Name:	HEVC_1.png
Views:	34
Size:	2.22 MB
ID:	51257  

    Last edited by june8; 30th Dec 2019 at 03:56. Reason: Correction.
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  2. Member
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    Is this an HDR source? Are you trying to maintain the HDR or remove it (tone map)?
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  3. Originally Posted by june8 View Post
    So, I think only changing to HEVC 10 bit will reduce to size without loosing quality.
    "without losing quality" compared to what ?

    You always lose quality when re-encoding with lossy format



    Also, handbrake /vidcoder used to not have true 10bit pipeline . They would truncate to 8bits. I think this is still the case
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  4. Member
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    Originally Posted by davexnet View Post
    Is this an HDR source? Are you trying to maintain the HDR or remove it (tone map)?
    No its not HDR. Any files I convert has the same result.
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  5. Member
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    Originally Posted by poisondeathray View Post
    Originally Posted by june8 View Post
    So, I think only changing to HEVC 10 bit will reduce to size without loosing quality.
    Also, handbrake /vidcoder used to not have true 10bit pipeline . They would truncate to 8bits. I think this is still the case
    So that's why I have the same results with each and every conversion. Blu-ray or DVD conversion, or any video file. All of them has more red picture than the original.
    I am going to convert to HEVC without 10bit and write to results.
    Last edited by june8; 30th Dec 2019 at 09:01. Reason: Correction
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