Adding a Cumulative Purchase Counter to FFmpeg-processed Videos
In this article, we will discuss how to add a cumulative purchase counter to a series of videos showing cashier transactions using FFmpeg. This process involves creating a running counter that displays the total number of purchases made in the video series.
What is FFmpeg?
FFmpeg is a free and open-source software project that produces libraries and programs for handling multimedia data. It is highly flexible and can be used for various multimedia tasks, including video and audio encoding, decoding, transcoding, muxing, demuxing, filtering, streaming, and playing.
Creating a Cumulative Purchase Counter
To create a cumulative purchase counter for FFmpeg-processed videos, we will need to use a script that can increment the counter for each video processed. Here is an example of a bash script that can do this:
#!/bin/bash
# Initialize the counter
counter=0
# Loop through all the video files
for file in input\*.mp4; do
# Increment the counter
counter=$((counter+1))
# Add the counter to the video using FFmpeg
ffmpeg -i "$file" -vf "drawtext=fontfile=/path/to/font.ttf: \
text='Purchase #$counter': fontcolor=white: fontsize=24: box=1: [email protected]: \
boxborderw=5: x=(w-text\_w)/2: y=(h-text\_h)/2" output\_"$counter".mp4
done
In this script, we initialize the counter to 0 and then loop through all the video files with the input\*.mp4 pattern. For each video file, we increment the counter and then use FFmpeg to add the counter to the video using the drawtext filter. The text is centered both horizontally and vertically, and the box and border are added to make it more visible.
After running this script, you will have a series of output videos with the cumulative purchase counter added to each video. The output videos will be named output\_1.mp4, output\_2.mp4, and so on.
Adding a cumulative purchase counter to FFmpeg-processed videos is a simple process that can be accomplished using a bash script and the FFmpeg drawtext filter. By following the steps outlined in this article, you can create a running counter that displays the total number of purchases made in the video series.