The Sony Alpha 5100 has a maximum video recording time of 29 minutes, but only for some formats. That limit is also dependent upon multiple factors like camera settings, media storage size, camera power, and internal camera temperature. See details and notes below for more information.
Maximum continuous video recording times for the Sony Alpha 5100
1Duration is approximate and is a product specification limit.
2Limited by file size of 2GB (approximately 20 minutes).
Normal Frame Rates (59.94 fps or less)
High-quality movie recording and high-speed continuous shooting require large amounts of power. Therefore, if you continue to shoot, the temperature inside the camera will rise, especially that of the image sensor. In such cases, the camera will turn off automatically because the surface of the camera is heated to a high temperature or the high temperature affects the quality of the images or the internal mechanism of the camera.
If the file size reaches 4 GB when [File Format] is set to MP4 mode, recording will automatically stop.
Video is recorded in a variable bitrate, which automatically adjusts image quality depending on the shooting scene. Therefore, recording times will vary depending on the content you are shooting and the shooting conditions.