• In this blog we will come to know how to add our own logo in a video as well as custom text which will scroll left to right in the middle postion of screen.


    Lets see the command:

    ffmpeg -rtsp_transport tcp -i rtsp:// -i /home/oodles/Desktop/logo.png -filter_complex "[0:v][1:v]overlay=main_w-overlay_w-10:10" -f flv pipe:1 | ffmpeg -i pipe:0 -vf "drawtext=text=oodlestechnologies :fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf: y=((h)/2):x=(mod(5*n\,w+tw)-tw): fontcolor=red: fontsize=40: shadowx=-5: shadowy=-15" -vcodec libx264 -vb 400k -acodec aac -ab 100k -ar 48000 -ac 2 -f flv -muxdelay 0.1 rtmp://oodles:oodles@

    The sample output:-

    • Explanation of command:
    • "-rtsp_transport tcp " - Set RTSP transport protocols tcp.

    • "-i "- specifies the input file stored in local disk or live audio/video source.

    • "-filter_complex" - to recognize filtergraph.

    • "[0:v][1:v]overlay=main_w-overlay_w-10:10" - main_w refers to the width of the "main" input (the background or [0:v] or our main input here rtsp://,and overlay_w refers to the width of the "overlay" input (the logo.png or [1:v]).This is how you can tell overlay what inputs to use. You can omit [0:v][1:v], and overlay will still work, but it is recommended to be explicit and not rely on possibly unknown defaults

    • "-f flv"- output file format flv.

    • "pipe:1" - stdout

    • " | " - to connect two command together so that the output of one program becomes the input of the next program.

    • "-vf " - for creating filter graph on video

    • "drawtext" - Draw a text string or text from a specified file on top of a video

    • "text"- the text which we want to scroll.

    • "Fontfile" - the font of text

    • "y=((h)/2) " - y axis of the scrolling text, for middle h/2.

    • "x=(mod(5*n\,w+tw)-tw) "- For scrolling text we are setting x axis for each frame.

    • "fontcolor" - font color of text

    • "shadowx" - x axis shadow on text

    • "shadowy" - y axis shadow on text

    • "-vcodec" - video codec

    • "-vb" - video bitrate

    • "-acodec" - audio codec

    • "-ab " - audio bitrate

    • "-ar" - audio sampling rate

    • " -ac" - audio channel

    • "-muxdelay" - Set the maximum demux-decode delay in secs.


Tags: ffmpeg , video

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