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  1. Member
    Join Date: Jan 2012
    Location: Budapest
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    My HD TV records doesn't look so good after upload....
    (watch in 1080p)


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  2. do you need?
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  3. Filter all the noise out of your video. Noise sucks up bitrate.
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  4. Member netmask56's Avatar
    Join Date: Sep 2005
    Location: Sydney, Australia
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    Originally Posted by jagabo View Post
    Filter all the noise out of your video. Noise sucks up bitrate.
    How would he do this assuming no prior knowledge of the appropriate techniques?
    TheVoiceIsAnotherPerson ~ BeyonWiz DP-P1 PVR + LiDiC ~ Popcorn C200 ~ Samsung ES8000 65" LED TV ~ Windows 7 ~ Yamaha RX-A1030
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  5. Use strong temporal and spacial noise filters found in most video editors. And of course, shooting low noise video in the first place is a big help.

    Also, whenever possible use completely static backgrounds or strong depth-of-field to get very blurry backgrounds.
    Last edited by jagabo; 16th Dec 2013 at 19:16.
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  6. What's preferable between a noisy and noiseless video at the same bitrate? The noisy video will have unintentional textures from the compression artifacts but the edges will be inferior even with Psy RDO enabled, and the noiseless video will have its oversmoothing of details exasperated by the compression and some distortion on the edges visible which are masked in the other video by the noise.

    I prefer the latter but sometimes when I wasn't satisfied with some videos whose nosie couldn't be removed without oversmoothing, I encoded them with x264 with an intentionally lower bitrate than normal because I knew the compression would obliterate the noise anyway. The result to me looked better than encoding the denoised version at the same bitrate.
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  7. Broadcaster bigass's Avatar
    Join Date: Dec 2006
    Location: Halifax, NS Canada
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    Sure, but would you ever intentionally add noise to a clean video to achieve some kind of encoding goal?
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  8. Code:
    @ffmpeg -i %1 -vf "scale=iw*min(4096/iw\,2304/ih):ih*min(4096/iw\,2304/ih),pad=4096:2304:(4096-iw)/2:(2304-ih)/2" -c:v libx264 -preset slow -crf 18 -c:a libvorbis -q:a 5 output.mp4
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  9. Banned
    Join Date: Oct 2004
    Location: New York, US
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    -30-
    Last edited by sanlyn; 19th Mar 2014 at 10:20.
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  10. Sure, but would you ever intentionally add noise to a clean video to achieve some kind of encoding goal?
    if your source if 10bit and your target is 8bit banding could become a problem if you don't add some noise through dithering, so dithering would be a valid example of adding noise 'noise to a clean video to achieve some kind of encoding goal'
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