Not quite sure why you get 14hr 11mins - maybe the tolerance on your oscillator is a little on the wide side and is running faster still, but I thought they were meant to be fairly good. ffmpeg doesn't know this so is just stamping it with 40ms between frames.ġ4hr + 0.8% = 14.11hours, or 14hrs 6min 46secs. Therefore your requested 25fps is actually delivering 25.2frames/s.
So now we have cameras running 0.8% fast (25/24.8). The manufacturers got hold of it and found that 24.8MHz oscillators were more expensive than 25MHz oscillators, so substituted one for the other. When the module went for EMC testing, that configuration failed, so they redesigned the board to have an on-board oscillator. The sensor is programmed on the basis that it is fed with a 24.8MHz clock as that was the original design, with that coming direct from the Pi down the ribbon cable. To resolve this issue, try VLC media player.(This is where I start hating the manufacturers of the camera board) MP4 is a container that contains various kinds of data, so when there is a problem opening the file, it usually means that data in the container (an audio or video codec) is not compatible with the device’s OS. On some devices, particularly mobile, opening this file type can be problematic. On Windows, it opens in Windows Media Player. There is no need for third-party software. Simply double-clicking the file opens it. MP4 files open in the operating system's default video player. Many consider MP4 to be one of the best video formats available today. It is also a popular video format for streaming over the Internet, such as on YouTube. It is compatible with a wide range of devices and operating systems, using a codec to compress file size, resulting in a file that is easy to manage and store. MPEG-4 (MP4) is a container video format that can store multimedia data, usually audio and video.
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