DV/webcam devices

Only DV/webcam devices that support the Microsoft DirectShow API can be used with the QTM software. This is true for most webcams, however there are very few video cameras equipped with a DV–output or FireWire 4-pin connection. This is a requirement to be able to stream out video in real-time. The option for video cameras without firewire is to use the Intensity Pro card, see chapter Video capture with Blackmagic Design cards.

There can be several devices connected to QTM, but there might be problems with the video capture if too many are connected. The reason is that the video data stream becomes too large and the frame rate of the video devices will therefore be lowered. If you have problems capturing many video cameras at the same time you can use import the link to a video file after the measurement, see chapter Import video link.

The video devices are connected to QTM on the Input devices page in the Project options dialog, see chapter Input Devices. For the DV cameras the audio is recorded directly with the video. Webcams on the other hand has the audio sent separately to the computer, which means that you have to select it manually, see chapter Selecting audio source.