ffmpeg stream and save video from Dahua 4300s IP Camera

## readme.md

      
        

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    Use ffmpeg to stream video from a dahua 4300s to a file or files
You can use ffmpeg to directly pull frames off of a dahua 4300s at full resolution. May be a good
alternative to pricey dvrs which likely cannot record at full resolution, may not work with
the camera, or are prohibitevly expensive
Simple Stream to file
Simple stream to file. Full resolution
ffmpeg -loglevel debug -rtsp_transport tcp -i "rtsp://admin:admin@198.175.207.61:554/live" \
-c copy -map 0 foo.mp4

Break streamed file into  time segments
ffmpeg can save file in arbitrary segments at fixed intervals. In this example, we save a new file at
10 second intervals, but the value for segment_time can be any positive integer
ffmpeg  -rtsp_transport tcp -i "rtsp://admin:admin@198.175.207.61:554/live"  \
-f segment -segment_time 10 -segment_format mp4 -reset_timestamps 1 \
-c copy -map 0 test%d.mp4

Timestamped output
Output files can be timestamped as well.
ffmpeg  -rtsp_transport tcp -i "rtsp://admin:admin@198.175.207.135:554/live" \
-f segment -segment_time 10 -segment_format mp4  -reset_timestamps 1 \
-strftime 1 -c copy -map 0 dauphine-%Y%m%d-%H%M%S.mp4

Select stream to read from.
A different url is used to select the substream. Set subtype to 0 for main hi-res stream, or
1 for low res substream. Channel looks to always be set to 1
ffmpeg  -rtsp_transport tcp -i "rtsp://admin:admin@198.175.207.135:554/cam/realmonitor?channel=1&subtype=1" \ 
-f segment -segment_time 10 -segment_format mp4  -reset_timestamps 1 \ 
-strftime 1 -c copy -map 0 test-%Y%m%d-%H%M%S.mp4