FFmpeg is a video and audio editing tool that can be used to extract and modify video and audio files. Here's an example of how to use FFmpeg to display the progress of a video file without it working as expected:

```bash

specify the input file URL

url="https://example.com/video.mp4"

specify the output file URL

output_url="output.mp4"

specify the output format

format="mp4"

specify the output directory

output_dir="output"

specify the output filename

output_file="${output_dir}/${output_file}"

construct the FFmpeg command

ffmpeg -i "$url" -vf "select=always -r 30 -ac 2 -f ${format}" -c:v libx264 "${output_file}"

display the progress

ffmpeg -i "${output_file}" -stats "showProgress=on" ```

Let's break down the command:

• url: The input file URL you want to extract the progress from.
• output_url: The output file URL you want to save the video with the progress displayed.
• format: The output format you want to create (e.g., MP4, WebM, AVI).
• output_dir: The output directory where you want to save the video with the progress displayed.
• output_file: The name of the output file with the progress displayed.

The select=always filter is used to select the video and audio streams, ensuring that the progress is displayed for all audio and video streams. The -r 30 option specifies the frame rate of the video (30 frames per second), -ac 2 specifies the audio codec (AAC), and -f ${format} specifies the output format (MP4 in this case).

The ffmpeg -i "${url}" command is used to extract the input file, and the -vf "select=always -r 30 -ac 2 -f ${format}" option tells FFmpeg to use the video and audio streams as a single output stream, regardless of the format.

The -c:v libx264 option specifies the codec (libx264) to use for the output. The libx264 codec is a widely used video codec for high-quality video encoding and decoding.

Finally, the -stats "showProgress=on" option enables the display of progress bars for each stream. The showProgress=on option sets the value of the showProgress option in the output file's FFmpeg Infos section.

After running this command, you should see the progress bars displayed for each audio and video stream in the output file, indicating the progress of the video file extraction. Note that the progress bars may vary in size and style depending on the video file and FFmpeg version you are using.