I'm using the following
ffmpeg command to create an H.264 encoded MPEG transport stream from a single png file with a text overlay.
ffmpeg -re -loop 1 -i smpte-color-bars-1080p.png -vf drawtext="fontfile=monofonto.ttf: fontsize=96: box=1: email@example.com: boxborderw=5: fontcolor=white: x=(w-text_w)/2: y=(h-text_h)/2: text='MY OVERLAY'" -r 25 -vcodec libx264 -f mpegts udp://0.0.0.0:1234
This seems to be working well, but as it is static you cannot easily tell if the encode has stopped. I'd therefore also like to add a timecode overlay so that the image has some changing content.
It is important that the stream is generated from a single static frame as I want the stream to be absolutely continuous and not a looped pre-encoded TS file.
Is there any way to add this dynamic overlay using ffmpeg? (I'm currently thinking piping one stream into another but that seems a bit hacky)
I'm trying to do this on a linux (Ubuntu) platform.