Forum Discussion

destruk's avatar
destruk
Streaming Star
12 years ago

Variable framerate?

Are there any known issues with using cellphone video on Roku? We're noticing sometimes the phone compresses the image data to 24fps to save bandwidth, while during high motion shots it changes to 30fps to retain quality. Will I need to split it apart and normalize the framerate to 24 by dropping extra frames or duplicate frames to 29.97 for roku to use it, or can it be used as an mp4 with VFR?
Roku Developer Program

2 Replies

  • EnTerr's avatar
    EnTerr
    Roku Guru
    12 years ago
    Based on the observation that Roku video output is always* 60Hz, if you are going to single frame rate, it better be 30/29.97 - since for 24fps the player does 3:2 pulldown (or worse) anyway. Out of curiosity, how does Roku perform currently on your VFR videos?

    (*) see pending question. Also rumor has it legacy (fw3) Roku players could've output in native 24fps.
  • destruk's avatar
    destruk
    Streaming Star
    12 years ago
    I'll try it and let you know...give me a couple minutes with the USB channel here... 🙂
    Dang...it is smooth and works just fine. So this is great. Thanks.