In this specific example, we read an RTSP stream from a server. The RTSP server has two streams - A video stream and a 'Data' stream. Since we aim to print the data channel byte data to STDOUT, we are 'mapping' the 2nd stream of the first input (i.e.: -map 0:1) to the output. We ensure the 'encoding' we use is text and that this encoding is set to 'data' format (i.e.: -c text -f data).
Finally, since FFmpeg typically expects a file output, we add the - to indicate we would like the output to go to STDOUT. That's it!
https://www.ffmpegbyexample.com/examples/wk7c9c6q/print_data_channel_to_stdout_using_ffmpeg/
In this specific example, we read an RTSP stream from a server. The RTSP server has two streams - A video stream and a 'Data' stream. Since we aim to print the data channel byte data to STDOUT, we are 'mapping' the 2nd stream of the first input (i.e.:
-map 0:1) to the output. We ensure the 'encoding' we use istextand that this encoding is set to 'data' format (i.e.:-c text -f data).Finally, since FFmpeg typically expects a file output, we add the
-to indicate we would like the output to go to STDOUT. That's it!