Shotcut Video Editor tricks
1. When you are importing video from action camera, shotcut will prompt you to convert it into fixed bitrate format. That helps. 2. To reduce fish-eye effect from action camera footage, use lens correction filter and use near-center correction value of 45 and near-edge correction value of 40. 3. Use stabilize filter to reduce shakiness. It won't be as good as a gopro's video due to not having corresponding gyro data. But it will be much better than no-stabilization.