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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. Fabian Giesen‏ @rygorous 23 Mar 2020

      Finished with "Gideon the Ninth" (book) and it's great. Would recommend.

      0 replies 1 retweet 18 likes
    2. This Tweet is unavailable.
    3. Fabian Giesen‏ @rygorous 24 Mar 2020
      Replying to @Jonathan_Blow

      I don't know what that is!

      1 reply 0 retweets 1 like
    4. Casey Muratori‏ @cmuratori 24 Mar 2020
      Replying to @rygorous @Jonathan_Blow

      https://www.youtube.com/watch?v=fCOf91smkXU … (as a bonus, this video actually has the motion smoothing filter problem that I wrote the blog entries about and you did the frequency analysis of!)

      1 reply 0 retweets 2 likes
    5. Fabian Giesen‏ @rygorous 24 Mar 2020
      Replying to @cmuratori @Jonathan_Blow

      nah, that's a separate issue. This was originally captured as MPEG-4 ASP it looks like, which did not actually specify the exact IDCT or motion compensation filters to use, it just let you pick your own approximation.

      2 replies 0 retweets 1 like
      Casey Muratori‏ @cmuratori 24 Mar 2020
      Replying to @rygorous @Jonathan_Blow

      Well sure, but I'm not sure how that makes it not the same issue? I suppose if you're saying that you think this is actually just the IDCT adds being off and it's summing up to sharpen, OK, but I guess I'd have to look at the actual data to know if that was the case...

      3:08 PM - 24 Mar 2020
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Casey Muratori‏ @cmuratori 24 Mar 2020
          Replying to @cmuratori @rygorous @Jonathan_Blow

          My assumption would have been this is just what happens when you have a sharpening filter and the encoder doesn't know about it (or the stream gets lots partially, so the updates go away - I've seen that happen with MP4s before as well, and you get the sharpening over time).

          1 reply 0 retweets 0 likes
        3. Fabian Giesen‏ @rygorous 24 Mar 2020
          Replying to @cmuratori @Jonathan_Blow

          It just always looks like that whenever encoder and actual decoder disagree about what the reconstruction should be.

          1 reply 0 retweets 0 likes
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