- 1 year ago
Switch between rtsp stream and static image input on the fly based on rtsp stream availability in ffmpeg command while recording
To switch between an RTSP stream and a static image input on the fly based on RTSP stream availability in an FFmpeg command while recording, you can use a combination of scripting and FFmpeg's filter graph capabilities. Here's a high-level approach:
Monitor RTSP Stream Availability: Create a script that periodically checks the availability of the RTSP stream. This can be done by attempting to connect to the RTSP stream or by checking for specific response codes.
Prepare FFmpeg Command: Construct an FFmpeg command that includes both the RTSP stream input and the static image input. Initially, set the RTSP stream as the primary input.
Dynamic Filter Graph: Use FFmpeg's filter graph capabilities to switch between inputs based on the availability of the RTSP stream. The
if
filter can be used to conditionally select the input based on a condition. For example:cssffmpeg -i "rtsp://..." -i "static_image.jpg" -filter_complex "[0:v] if=eq(n,0) [video_out]; [1:v] if=eq(n,0) [image_out]; [video_out][image_out] overlay" output.mp4
In this example, the
if
filter is used to select the video frame from the RTSP stream ([0:v]
) if the frame number (n
) is equal to 0. Otherwise, it selects the video frame from the static image input ([1:v]
). The selected video frame and image frame are then overlaid using theoverlay
filter.Update Input Source: When the script detects that the RTSP stream is unavailable, update the FFmpeg command to set the static image input as the primary input.
Continuously Run FFmpeg: Keep the FFmpeg command running continuously, using a loop or a service, to record the output based on the selected input.
By monitoring the RTSP stream availability and dynamically updating the FFmpeg command, you can switch between the RTSP stream and the static image input on the fly while recording.
Keep in mind that this is a high-level approach, and the specific implementation details may vary depending on your requirements and the scripting language you are using to monitor the RTSP stream availability. You may need to handle edge cases, error conditions, and adjust the FFmpeg command according to your specific use case.