Forum Discussion

emveepee1's avatar
emveepee1
Binge Watcher
5 years ago

DAR and SAR issues Roku Ultra 4800x

I have an SD video that  ffmpeg reports correctly as Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 720x480 [SAR 32:27 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc

The trouble is on the Roku Ultra 4800x this does not zoom to full screen it stays squished in the 4:3 window

The video plays fine on a Roku 3920x.   I can provide screen shots if that would help

I am trying to play this via roVideoPlayer.  Is some special processing requiried.  I did try with DrawScaledRect()  and I still can't get a full screen.  I am reluctant to try that because as I wrote it works ok on another box.

Roku Developer Program

8 Replies

  • necrotek's avatar
    necrotek
    Roku Guru
    5 years ago

    If it is the new 2020 Roku ultra (and some newer Roku TVs),  There is an issue with the graphic drivers that does not handle SD screens correctly in non Scenegraph channels. If you can, switch to using Scenegraph  video node and see if that plays the content correctly

    • emveepee1's avatar
      emveepee1
      Binge Watcher
      5 years ago

      Yes it it is the new Ultra.  Unfortunately I believe I need roScreen for 2DGraphics for the app I am working on since I render a lot of full screen bitmaps and I need sub second response which I believe is an issue with roSGScreen.