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Video Export frame rate mismatch

FrozenPFrozenP
in RaceChrono for iOS
On iPhone 13 Pro and iOS 18, video export works fine when no OBD device connected and 30 FPS internal recordings, but drop to 16.67 FPS once use 60 FPS recording.

With OBD connected and data overlay added, 30 FPS source recoding will drop to 15 FPS exported files, and 60 FPS drop to 16.67 FPS.

Comments

  • FrozenPFrozenP
    Also figured imported external recordings doesn't seem to have this issue
  • FrozenPFrozenP
    RaceChrono version 8.0.9
  • FrozenPFrozenP
    I believe this is a bug when reading and encoding the MOV files from internal camera. I attempted to export the MOV, convert to MP4, import back to RaceChrono and set as the main channel, then export again with all the overlays. Everything works fine and frame rate is correct.
  • Stef718SStef718S
    @FrozenP facing to the same issue with my iphone, sent email to support but no answer... when the issue will be fixed. @racechrono
  • FrozenPFrozenP
    https://racechrono.com/forum/discussion/comment/13965#Comment_13965

    I have a “workaround” that:

    1. Move the raw recording to photos app
    2. export raw recording in original format on a Mac
    3. Use Compressor to transcode and export the video to Apple4K
    4. Rename the file extension from m4v to mp4 so RaceChrono Pro can recognize it
    5. Import back to RaceChrono Pro as a second channel
    6. Add overlays in RaceChrono Pro and export with Channel 2

    bit complicated but it works for now.

    Another issue is regardless the frame rate of the original footage, the one exported by RaceChrono Pro is always 30FPS.

  • aol_of_RaceChronoaol_of_RaceChrono
    Hi, yes there is an intermittent problem with the iOS video export frame rate, will be fixed in next version.
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