Recording video does not contain length

[MykolaSolyanko]

Describe Your Environment

• Version of ZoneMinder v1.36.12
• Docker container
• Windows 10
• Firefox and Chrome

Describe the bug In recording mode, events are created in mp4 format, when I open them through the zoneminder web application, the time slider on the player is displayed. But when I open the saved file in a native player such as vlc, the progress slider is not displayed and there is no way to scroll through the video. After I run the following command ffmpeg -i "input.mp4" -c copy "output.mp4" the output file contains the length

To Reproduce Steps to reproduce the behavior:

1. On the general tab create Monitor in Function Record
2. On the source tab: Source Path -> rtsp_path Options->strict=experimental,fflags=nobuffer,rtsp_transport=tcp Capture Resolution (pixels) the same as camera resolution
3. On the storage tab: Save JPEGs -> Disable Video Writer->Camera Passthrougth
4. In the events directory we find the generated video file, open it with the vlc player and see that the video scroll slider is not available

Expected behavior when opening a file through the native player, the video scroll slider should be available

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