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Right now I have:

animation = 
 Table[ParametricPlot[{Cos[t], Sin[t]}, {t, -Pi, Pi}], {a, Pi, 
   0, -0.1}]
Export["~/animation.mov", animation, "FrameRate" -> 60]

but the result is fuzzy.

I tried increasing ImageSize but that just made a bigger blurry video. How can I increase the DPI?

There is some sort of metadata associated with this:

https://stackoverflow.com/questions/31586732/how-can-i-retain-2x-pixel-density-when-encoding-retina-screen-capture-with-ffmpe

https://video.stackexchange.com/questions/23503/how-does-quicktime-player-know-when-do-play-a-video-in-hidpi-retina-2x-mode

I made screen recording with a higher pixel density and found.

com.apple.quicktime.pixeldensity

present in the file

Improve this question
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8
  • $\begingroup$ Without your data, we cannot say anything. Show me what you're trying to do? $\endgroup$
    – Alex Trounev
    Commented Nov 14, 2019 at 11:49
  • $\begingroup$ @AlexTrounev I want to increase the pixel density $\endgroup$
    – 2426021684
    Commented Nov 14, 2019 at 14:15
  • $\begingroup$ You don’t even show us a picture? We have to guess what is hidden in your line of code there? $\endgroup$
    – Alex Trounev
    Commented Nov 14, 2019 at 14:38
  • $\begingroup$ @AlexTrounev pick any graph does not matter $\endgroup$
    – 2426021684
    Commented Nov 14, 2019 at 14:48
  • $\begingroup$ @AlexTrounev I’m asking about the export process $\endgroup$
    – 2426021684
    Commented Nov 14, 2019 at 14:49

1 Answer 1

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I cannot reproduce what you say. Increasing ImageSize increases the graphics size (but not the text size within the graphics!) without making it blurry.

I suggest you use Rasterize[..., ImageResolution -> a*72] on each frame to increase the frame size a-fold. The export the list of frames.

Improve this answer
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9
  • $\begingroup$ I want 2x pixel-density like in stackoverflow.com/questions/31586732/… $\endgroup$
    – 2426021684
    Commented Nov 14, 2019 at 14:09
  • $\begingroup$ ImageResolution increase the frame size but not the pixel density $\endgroup$
    – 2426021684
    Commented Nov 14, 2019 at 14:11
  • $\begingroup$ When I open the movie in QuickTime it opens at 720x652 but I want it to open at 360x326 with double the density. Rising the video player window works but I want it to open with the correct size. $\endgroup$
    – 2426021684
    Commented Nov 14, 2019 at 14:14
  • 1
    $\begingroup$ @2426021684 Does QuickTime (or any movie format at all!) encode pixel density at all? I highly doubt that it does. If you know it does, can you provide a link that explains this? $\endgroup$
    – Szabolcs
    Commented Nov 14, 2019 at 15:30
  • $\begingroup$ stackoverflow.com/questions/31586732/… $\endgroup$
    – 2426021684
    Commented Nov 14, 2019 at 17:01

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