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    Go Back   Doom9's Forum > (HD) DVD, Blu-ray & (S)VCD > (HD) DVD & Blu-ray authoring

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    Old 19th August 2019, 16:41   #1641  |  Link
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    Er...OK...this time I didn't understand everything (Full-TAB, AR, DAR) but I keep in mind what you suggest about the Settings -> Full SBS/T&B aspect ratio.

    PS : I can't send you a private message : each time I write something and I click on "submit message", it's like it's working...but I don't see anything in "Sent item" so...I assume everything I wrote is lost...
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    Old 19th August 2019, 17:53   #1642  |  Link
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    Make sure "Save a copy of this message in your Sent Items folder" is ticked when you write a PM. You can activate this option by default in the Options of your CP.
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    Old 20th August 2019, 18:42   #1643  |  Link
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    Quote:
    Originally Posted by thxoptimizer View Post
    PS : I can't send you a private message : each time I write something and I click on "submit message", it's like it's working...but I don't see anything in "Sent item" so...I assume everything I wrote is lost...
    I have received them, and replied. Maybe you have also to untick the "Receive Private Messages only from Contacts and Moderators" option ?
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    Old 20th August 2019, 22:09   #1644  |  Link
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    Just a few words in reply

    Quote:
    Originally Posted by r0lZ View Post
    Thanks for the info. However, I'm not sure I agree with your conclusion. First, it should be noted that most relatively old 3D TVs (not UHD) do NOT support Full-TAB or Full-SBS. They require the half resolution, because their decoding buffers are just sufficient for 2D Full-HD. When they play a 3D movie, they have to handle two views at the same time, and therefore, they cannot do it in full resolution.
    Yes, I should have mentionned my post did not apply to all TVs indeed.

    Quote:
    Originally Posted by r0lZ View Post
    Of course, that limitation doesn't exist on UHD TVs, because their buffers are twice as large as what is needed to decode Full-3D.
    Agreed, FTAB/FSBS is mainly intended to get the best out of UHD TVs.

    Quote:
    Originally Posted by r0lZ View Post
    Also, I must admit that I don't understand why your TV shows the Full-SBS movies with less quality than Full-TAB. IMO, the two views must be cut BEFORE they are processed for the 3D display, and therefore, there is no reason to prefer one method over the other. But I trust your test. Your TV (and perhaps most or all LG TVs) has a problem with Full-TAB. That doesn't mean that the TVs made by other brands have the same problem. If would be nice to compare the two methods with, say, a Samsung UHD TV. I bet that both methods will give equivalent results.
    Yes this is a bit strange and I just noticed this lately, however I have had that TV for nearly 3 years...
    BTW "Your TV (and perhaps most or all LG TVs) has a problem with Full-TAB" ==> I guess you wanted to write "with Full-SBS".

    Quote:
    Originally Posted by r0lZ View Post
    Anyway, BD3D2MK3D offers all possibilities, so you are free to use what gives the best result with your equipment.
    And this is where I give you my best thanks for the excellent work
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    Old 20th August 2019, 22:19   #1645  |  Link
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    May I give my 2 cents about how I sort the things out of this SAR/DAR complexity when I encode in FTAB (for my LG UHD TV) ?

    After the 3D encoding, I use MKVToolNix with the header editor, and edit the "Video display width/height" of the video stream with the target 1920/1080 values (usually they are set to same values as "Video pixel width/height" of 1920/2160).

    Maybe I could set the parameters right in BD3D2MK3D that would do it for me without tweaking, but I don't remember ever succeeding with this, and this header tweaking gives me a 100% assurance that everything will play fine on the TV.

    Quote:
    Originally Posted by r0lZ View Post
    This is a well known problem, due to the fact that the de-facto standard for 3D SBS or TAB is not very consistent, especially for Full-SBS or Full-TAB. The aspect ratio to use is not clearly specified. Some TVs require to set the aspect ratio of the combined view, and others require the aspect ratio of the final display (16:9), and some (like my Samsung) ignore totally the AR settings and disp[lay the movie in 16:9 full-screen anyway (and this is not a bad idea, because the SBS/TAB standard REQUIRES a 16:9 movie, with the black bars if necessary, so displaying it in 16:9 anyway makes sense.)

    For a good result, you may have to change the AR settings with the menu Settings -> Full SBS/T&B aspect ratio. Note that there are two AR: the DAR set in the MKV header and the SAR in the video stream, so there is a total of 4 combinations. I suggest to encode a little clip several times just to verify what setting works for your TV. You can already exclude the default settings. :-(

    Note also that there is no problem in Half-SBS/TAB.
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    Old 21st August 2019, 22:22   #1646  |  Link
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    Quote:
    Originally Posted by dm9656 View Post
    Maybe I could set the parameters right in BD3D2MK3D that would do it for me without tweaking, but I don't remember ever succeeding with this, ...
    Well, just tick "Settings -> Full SBS/T&B Aspect Ratio -> Use 16:9 AR For Both (Not recommended)". That should put directly the right values for your TV in the MKV header.

    Unfortunately, some TVs prefer to trust the SAR in the video stream, and AFAIK, you cannot change it without re-encoding.
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    Old Yesterday, 00:51   #1647  |  Link
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    ffmpeg can change H.264 and HEVC SAR values without re-encoding.
    https://www.ffmpeg.org/ffmpeg-bitstr...4_005fmetadata
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    Old Today, 20:35   #1648  |  Link
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    Thanks for the info. I did not know that. :-)
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  • 隐私条款中国国家地理网 2019-08-10
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