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Re: Re:Creating BD 63% quality

  •  10-12-2016, 7:59

    Re: Re:Creating BD 63% quality

    thanks guys,

    Sorry if my question was unclear.

    It was a "What-if" question - wondering if setting "Best Quality" on my BD output - really gives me anything extra.

    Interesting to see it can make a small difference - but in the overall - I dont think it matters so much for my home videos.

    I did a small test.

    I put a 37 sec clip on the timeline. .m2ts file recorded with my Sony camcorder - in best quality setting.

    MediaInfo tells me :

    Format                           : BDAV
    Format/Info                      : Blu-ray Video
    File size                        : 76.8 MiB
    Duration                         : 37s 395ms
    Overall bit rate                 : 17.2 Mbps
    Maximum Overall bit rate         : 18.0 Mbps

    Then I made 3 versions of a BD output from Pinnacle Studio14

    Best Quality - 40Mbps:

    Format                           : BDAV
    Format/Info                      : Blu-ray Video
    File size                        : 121 MiB
    Duration                         : 37s 751ms
    Overall bit rate                 : 26.8 Mbps
    Maximum Overall bit rate         : 32.1 Mbps

    Adjusted setting - 24Mbps:

    File size                        : 117 MiB
    Duration                         : 37s 756ms
    Overall bit rate                 : 26.0 Mbps
    Maximum Overall bit rate         : 30.9 Mbps

    Adjusted setting - 18Mbps:

    File size                        : 90.8 MiB
    Duration                         : 37s 837ms
    Overall bit rate                 : 20.1 Mbps
    Maximum Overall bit rate         : 23.9 Mbps

    And it is impossible for me to detect any difference in the output quality.

    The filesize goes up sligthly with the 18Mbps setting (compared to source file) - but the total filesize compared to the 40Mbps is 25% reduced (91mb compared to 121mb).

    In the "Picture type" setting I have used "BDMV(AVC)" - the other option is "BDMV(Mpeg2)" - dont know if that matters for the quality ??

    My conclusion now is that with the current recorder I have - it does not make any sense to use "Best quality" - my filesize goes up - and I guess more processing is needed.

    Am I right ?

    thanks 

     

     

     

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