First Things First:
Is FieldMonitor not installing / not starting / crashing on your iDevice? Try a reset: hold down the power and home buttons until the screen goes dark, and keep holding them down until the Apple logo appears (about 10 seconds overall). After your iDevice restarts, try FieldMonitor again.
Important info:You need a compatible Panasonic camera (GH5, GH4, LX100; possibly similar models) or a Teradek H.264 transmitter (Cube 100, 200, 500, or 600 series, Clip, or VidiU) to use this app. Without a Teradek or Panasonic, this app doesn't do anything useful!
with Panasonic cameras depends on unencrypted communications. If Panasonic enables
encryption in a camera firmware update, FieldMonitor will not work with that update. As
Panasonic does not publish their communications protocol or support third-party control
apps, there is no guarantee that FieldMonitor will ever be able to work with
encrypted cameras. The risk of this occurring is unknown, but it is a risk.
cameras usable with Panasonic’s Image App should work, though only the GH5, GH4, and
LX100 have been tested so far. Make sure your camera supports live view while recording
when using Image App before trying FieldMonitor.
only displays the compressed H.264 feed from a Teradek Cube, Clip, or VidiU.
Uncompressed video from a Bolt is not supported. H.265 / HEVC compression
(Cube 700 and 800 series) is not supported. Serv and Serve Pro are not supported.
- My source doesn’t appear in the Source list!
- Check to make sure you’re on the same wireless network as your source (the app’s current Wi-Fi network is shown at the top of the Source screen).
- Make sure your source has its Wi-Fi function turned on.
- Sometimes it takes a while for a Teradek to appear in the list. Try waiting a bit after starting the app. If your Teradek has just been turned on or reconfigured, it may take a minute for it to fully start up and become available in the Source list.
- Tap ♻︎ to rescan the network.
- Try turning Wi-Fi off, then on again.
- Only Teradek’s H.264 Wi-Fi encoders can be used: Cube, Clip, and VidiU. FieldMonitor can’t decode uncompressed video from Bolt transmitters.
- If your source restarts or its network has changed, FieldMonitor may get confused. Try tapping ♻︎, closing and re-opening FieldMonitor, or turning Wi-Fi off and then on again.
- If all else fails with a Teradek, try factory-resetting it.
- I can’t connect / no picture ever appears!
- Tap < Source to return to the Source Screen, then tap the source again to reload the Monitor Screen.
- Camera: if the camera is in playback mode, switch it back to live mode.
- Camera: try restarting its Wi-Fi. If all else fails, power down the camera and remove its battery or disconnect its AC adapter. Then supply power, restart the camera, and try again.
- Cube: only H.264 Quickview, Teradek Stream (a.k.a. TDS), and RTP/RTSP streams are supported. Quick fix: enable Quickview streaming on your Cube, and turn Quickview ON in the app.
- Cube: if UDP Multicast is enabled, enable Quickview on the Cube and turn Quickview ON in the app, or the app will never connect.
- Cube: RTSP stream is password-protected. FieldMonitor can’t receive a password-protected RTSP stream. Either turn off RTSP authentication, or enable Quickview on the Cube and turn Quickview ON in the app.
- Cube or Clip: TDS streams don’t play: make sure your Cube or Clip firmware is up to date (some older firmware versions no longer detect when updates are available; check the Teradek website directly). TDS streams are tricky; it sometimes takes many attempts before they’ll play, and sometimes you need to reboot the Teradek before it’ll connect. If you can use RTP/RTSP or Quickview, those tend to connect more reliably.
- Only Teradek H.264 Wi-Fi encoders can be used: Cube, Clip, and VidiU. Only Quickview, RTP/RTSP, and TDS streams can be decoded. FieldMonitor can’t display uncompressed video from Bolt transmitters, or H.265 / HEVC from Cube 700 or 800 series transmitters.
- If all else fails with a Teradek, try factory-resetting it.
- Picture is frozen (and may say “Paused” or “Reconnect to source”): This
happens with Teradek feeds if you slide Control Center or Notification Center over the app,
or use Slide Over or Split Screen on iPad, or turn your iDevice off and on again while FieldMonitor
is running. It can also happen if the connection to the source is lost or weak. Go back to
the Source screen and re-select your source to restart the video. If the screen says
”camera in play mode”, switch the camera back to live mode.
- Picture updates slowly, or the image is delayed by more than a fraction of a second: Try selecting a lower Refresh Rate, to free up more time for image decoding and display. If that doesn’t work, try reconnecting to the source; closing and re-opening the app (when you close it, it quits, so you don’t need to force-quit it); restarting your Teradek; reconfiguring the Wi-Fi network to minimize congestion (try switching between 2.4 and 5 GHz bands; however most cameras and iPhone 4S can’t use 5GHz Wi-Fi) or increase range (usually better with 2.4 GHz channels). If you’re using a Cube, try using Quickview instead of TDS or RTSP streams, or try reducing the resolution of your feed from 1080 lines to 720 or 480 lines.
- ’Scopes update slowly: Try selecting a higher Refresh Rate (but note that faster refreshing uses more power and may cause the picture to break up or fall behind realtime updates, depending on your iDevice).
- Picture quality is poor (pixellated, torn, blocky, intermittent freezes, etc.): Poor signal quality, overloaded Wi-Fi network, and/or overworked iDevice.
- The single most important factor in getting a good picture is selecting a clear Wi-Fi channel, free from interference and congestion. Try manually setting a transmit channel (use a Wi-Fi scanner on Windows, Mac, or Android to find a clear channel). If you don't have a scanner, try changing from Auto 2.4 GHz to Auto 5 GHz, or vice versa (note: most cameras and iPhone 4S can’t use 5GHz Wi-Fi).
- Using a separate Wi-Fi router is usually better than using a Teradek in Master mode: the Teradek's own Wi-Fi signal is weaker and more subject to interference than that of a standalone router or access point.
- Older, slower iDevices may not be able to handle a high workload: when the ’scopes take too much time, picture quality suffers and image decoding can fail or fall behind realtime updates. Turn Quickview ON, set Refresh Rate to its minimum value (about 2 fps), and show only a single ’scope, or none, instead of all three. If you’re then able to receive a clean picture, try gradually increasing Refresh Rate. With Quickview ON, a slow refresh rate, and a single ’scope or none at all, FieldMonitor can be used successfully on an iPod touch 5G, iPhone 4S, or iPad 3. Newer, more powerful iDevices will work better, show more ’scopes without problems, and update their displays faster.
- There's no false-color settings button : You need an iDevice with an A7 or later processor to show false color: iPhone 5S or later, iPod touch 6G or later, iPad Air or later, iPad mini 2 or later, or iPad Pro.
- Picture levels and ’scopes change when I start recording: If you're
monitoring a Panasonic Wi-Fi camera, make sure the Levels
settings match those on the camera. Picture levels may change slightly, but the
levels shown on the ’scopes and false-color displays should remain consistent when Levels
settings match the camera’s configuration. (Note: if the camera’s setup is such that exposure
changes when the camera goes into record mode, levels and ’scopes will change—of
If you're looking at a Teradek feed from a hybrid camera (one that shoots both stills and video), levels changes reflect what the camera is actually putting out over HDMI or SDI. Often the signal is full-range (0–255 in 8-bit terms) when in standby, and legal (16–235) or extended (16–255) while recording. Check your camera’s operating instructions for more details.
- There’s no audio! Camera sources don't transmit audio or any audio-level indications. Teradek sources supply audio: make sure the Teradek is set to transmit audio, that it is receiving an audio signal, that your iDevice isn't muted, and that your iDevice’s volume isn't all the way down.
- Panasonic camera’s EVF and LCD go dark when Wi-Fi is used:
- If HDMI is connected and active, the EVF and LCD will turn off. Either unplug HDMI or monitor using the attached device.
- GH5: Wi-Fi is set to “Smartphone priority”. Go into the camera’s menus: Settings > Wi-Fi > Wi-Fi Setup > Priority of Recording Device, and select "Camera" if you want the camera‘s EVF/LCD and controls to stay active.
- I can’t use Panasonic Wi-Fi with 10-bit recording or output! The GH4 does not allow 10-bit output and Wi-Fi connection at the same time (the GH5 does allow 10-bit recording or output with Wi-Fi running). Other cameras may differ. If 10-bit is disabled in the camera’s menus when Wi-Fi is on (or vice versa), then it can't be done. Sorry!
- I see “camera busy” and “network timeout” messages:
- “camera busy” means the camera is being operated directly, or a menu is open. Make sure the camera is in normal operating mode (try half-pressing the shutter release).
- “network timeout” occurs when communications fail due to low signal strength, network
congestion, or interference—or the camera gets turned off. Sometimes the timeout clears
up by itself; other times you may need to switch Wi-Fi networks, move away from microwave
ovens and cordless phones, or make sure other network users aren't hogging bandwidth.
Also try returning to the Source screen and reconnecting to the camera; network timeouts
can get the camera out of sync with FieldMonitor, and reconnecting restores sync.
Generally speaking, two cameras can use the same Wi-Fi network at the same time, but three will cause timeouts if they're all transmitting simultaneously.
- Something else is wrong / broken / puzzling! Contact me so I can fix the problem and/or answer your questions! (If your email isn’t answered within a day or two, it may have fallen into a spam-trap; try contacting @adamwilt on Twitter instead.)
Need more help?
- Controls shows you FieldMonitor's buttons, gestures, and settings, and explains how they work.
- How To... describes how to use FieldMonitor and shows some examples.
- FAQ lists some frequently asked questions and their answers.
- Details & Info talks about how Wi-Fi WFM works and what its limitations are, gives tips and tricks for using it, and lists the open-source libraries used and where to find them.
If none of these solve your problem, please contact
© 2017 Adam J. Wilt. Last updated 2017.06.22