[FAQ] Preparing iOS and GoPro MultiCam Devices for Recording

[Harry]

Hi Tom,

I received your video and actually it overlays fine... There needs to be a difference in our configurations... Can you please enter the lap you want to overlay (Lap List -> select lap) and create snapshots so I can see the Event, Video and Data Recording sections? Furthermore, when tapping into the master video preview, you will land in "Video Details". Please create snapshots for this view too.

Sorry for the inconvenience.

- Harry

[Tom991S]

Harry - thanks for checking. I actually deleted all the data and started from scratch (new trackday). This time I went into the iphone recorded master video and tapped "move" to switch the gopro video into the top (master) position.

Still the same problem - won't overlay.

I've taken snapshots, posted the new video, and also the exported lap. Will send you the link to the dropbox folder.

Thanks
Tom

[stasmagic]

Is it correct to use "Use MultiCam Settings(none)" option in case i want manual video quality setup (based on each devise settings) for iPhone and gopro?

MultiCam Video Preset
There are three settings available: Picture in Picture optimized video settings for later use as a picture in picture video, Maximum Resolution will set the video to allow a later use as a master video, and Use MultiCam Settings does not change the video settings selected in MultiCam itself. Use the last setting value in case you want to set an individual video preset in MultiCam itself.

[Harry]

Yes, in LapTimer v19 it will be like this. For the current v18.x, this setting has no effect on external cams like the HERO (at least that's what I remember - it is a long time ago ). So currently, you will always set the resolution you like. Please take care to chose something that can be consumed by LapTimer - which is basically HD or FullHD.

- Harry

[brianw0]

Hi,

I"m using v19.0.4 Grand Prix Edition with a GoPro Hero4 Silver, and I'm having trouble with Harry's laptimer being able to recognize the video. I can download the video (mp4) from the GoPro4 to Harry's, but it won't play. I can download the same video to my PC and it plays fine. If I try to overlay, it says it is an invalid master video. Am I doing anything wrong? I also uploaded the video file to my dropbox here:

https://www.dropbox.com/s/o6hsc88z5f8gs ... 3.MP4?dl=0

thanks,
Brian

[Harry]

Hi,

Can't download the video (low bandwidth right now). The reason I can think of is it has some format not supported by your smartphone OS (Android, iOS?). If e.g. it is a 4K video, it will likely not work. Formats usually supported are SD, HD (720), FullHD (1080). In case this is the issue, you need to down size the video using ffmpeg or another video tool.

- Harry

[brianw0]

Okay thanks Harry. I know I configured the GoPro settings to 1080. Maybe there's another setting it is not compatible with. I'll look into it more.

[Harry]

It makes probably sense to convert it to the "standard" format. The ffmpeg command looks like this:

Code: Select all

ffmpeg -i input.mp4 -s hd1080 -c:v libx264 -crf 23 -c:a aac -strict -2 output.mp4

- Harry