FFmpeg can also be used to extract frames from videos or convert them into different formats.

To use FFmpeg for video conversion, you need to install it on your computer first. You can download the latest version of FFmpeg from their official website (https://ffmpeg.org/download.html) and follow the installation instructions provided there. Once installed, open a terminal or command prompt window and navigate to the directory where your media files are located.

To convert a video file using FFmpeg, you can use the following syntax:

#!/bin/bash

# This script uses FFmpeg to convert a video file from MP4 format to AVI format.

# First, we need to install FFmpeg. Visit the official website (https://ffmpeg.org/download.html) and follow the installation instructions provided there.

# Once installed, open a terminal or command prompt window and navigate to the directory where your media files are located.

# To convert a video file using FFmpeg, we use the following syntax:
# ffmpeg -i input_file.mp4 -c:v libx264 -preset veryfast output_file.avi

# The -i flag specifies the input file, in this case, input_file.mp4.
# The -c:v flag specifies the video codec to use, in this case, libx264.
# The -preset flag specifies the encoding speed, with "veryfast" being the fastest option.
# The output file is specified at the end, in this case, output_file.avi.


ffmpeg -i input_file.mp4 -c:v libx264 -preset veryfast output_file.avi

In this example, `input_file.mp4` is the source video file you want to convert, and `output_file.avi` is the destination video file where the converted video will be saved in AVI format. The `-c:v libx264 -preset veryfast` options specify that H.264 codec should be used for encoding with a “veryfast” preset, which results in faster conversion at lower quality.

To convert an audio file using FFmpeg, you can use the following syntax:

# This script uses FFmpeg to convert an audio file from MP3 to WAV format.
# The `-i` option specifies the input file, while the `-ab` option sets the audio bitrate to 192k.
# The output file is specified after the options, in this case named "output_file.wav".
ffmpeg -i input_file.mp3 -ab 192k output_file.wav

In this example, `input_file.mp3` is the source audio file you want to convert, and `output_file.wav` is the destination audio file where the converted audio will be saved in WAV format. The `-ab 192k` option specifies that the output bitrate should be set to 192 kilobits per second

FFmpeg also supports various other options for video and audio conversion, such as:

– `-c:a libfdk_aac`: Use FDK AAC codec for encoding audio.
– `-preset fast`: Set the preset to “fast” for faster conversion at lower quality.
– `-s 1280×720`: Resize the video output to a specific size (in this case, 1280×720).
– `-r 30`: Set the frame rate of the output video to 30 frames per second.
– `-i input_file.mp4 -c copy output_file.avi`: Copy the contents of an existing file (in this case, `input_file.mp4`) without reencoding it and save it as a new file (in this case, `output_file.avi`).

FFmpeg is also capable of transcoding live video feeds using custom demuxers or hardware acceleration with OpenCV VideoWriter API or WriteGear API. For more information on these advanced features, please refer to the official FFmpeg documentation and tutorials available online.