Pushing ip camera stream to live video url with scrolling text and scrolling logo using ffmpeg

Posted By : Chandan Kumar Singh | 28-Jul-2015

In this blog I am going to explain how to scroll the logo on top of the screen as well as text in the middle of the screen. As I have explained the input will be our live video source or ip camera stream and output also will we another live video source.

Lets see the command :

 ffmpeg -thread_queue_size 32 -rtsp_transport tcp -i rtsp://admin:admin@69.58.126.201:554/h264/ch1/main/av_stream -framerate 25 -i /home/oodles/Desktop/logo.png -filter_complex "[0:v][1:v]overlay=x=(mod(3*n\,main_w+overlay_w)-overlay_w):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 -acodec aac -f flv -muxdelay 0.1 rtmp://oodles:oodles@192.168.67.128:1935/live-demo/mstream
 

Explanation of command:

  • -thread_queue_size -  Allow to set the thread message queue size, here 32

  • -rtsp_transport -  Set RTSP transport protocols, here tcp

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

  • rtsp://admin:admin@69.58.126.201:554/h264/ch1/main/av_stream - input live camera ip

  • -framerate -  Set the framerate, here 25 fps. You can also use -r instead of -framerate

  • -filter_complex - to recognize filtergraph

  • [0:v][1:v]overlay=x=(mod(3*n\,main_w+overlay_w)-overlay_w):10 - [0:v] is our main input, rtsp://admin:admin@69.58.126.201:554/h264/ch1/main/av_stream

    [1:v] is our overlay input, here /home/oodles/Desktop/logo.png.

    overlay=x=(mod(3*n\,main_w+overlay_w)-overlay_w):10- means we want to scrolling position of logo to the left and 10px down, originating from the top left corner.

    now,

    n is number of input frames starting from 0.

    main_w is the main input width.

    overlay_w is the second (logo) input width. here what we are doing is for each frame we are calculating x axis

  • -f - output file format, here flv

  • pipe:1 - it is for stdout (standard output)

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

  • pipe:0 - it is for stdin(standard input).

  • -vf - video filter

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

  • text - text which you want to add on video

  • fontfile - the font of text

  • x=(mod(5*n\,w+tw)-tw):y=(h/2)

    here

    n is number of input frames starting from 0

    w is the main input width.

    tw is the rendered text width  

    h height of screen

  • fontsize - the size of font

  • fontcolor - color of text

  • shadowx - x axis,shadow on text

  • shadowy - y axis,shadow on text

  • -vcodec -  Set the video codec. This is an alias for -codec:v , here libx264.

  • -acodec - set the audio codec ,here audio codec is aac

  • -muxdelay - Set the maximum demux-decode delay in secs. here 0.1 sec

  • rtmp://oodles:oodles@192.168.67.128:1935/live-demo/mstream - the target url where we pushed the video. oodles:oodles is username and password of wowza.

About Author

Author Image
Chandan Kumar Singh

Chandan is a bright Web Developer with expertise in Java and Spring framework and ORM tools Hibernate. He loves technologies like Blockchain and IoT.

Request for Proposal

Name is required

Comment is required

Sending message..