Extract Video Metadata in Flat Format with FFmpeg

This article explains how to use FFmpeg’s companion tool, ffprobe, to extract video metadata and output it in a flat, easy-to-parse format. By using the flat print format, you can easily read video properties like duration, resolution, and codecs directly in command-line scripts.

To extract video metadata in a flat format, you need to use the ffprobe command-line utility, which is installed automatically alongside FFmpeg.

Run the following command in your terminal:

ffprobe -v error -show_format -show_streams -print_format flat input.mp4

Parameter Breakdown

• ffprobe: The command-line tool used to analyze multimedia streams.
• -v error: This option suppresses unnecessary log details and banner information, ensuring that only the metadata (and any critical errors) are printed to the console.
• -show_format: Instructs the tool to output container-level metadata, such as file size, duration, bit rate, and format name.
• -show_streams: Instructs the tool to output stream-level details, including video resolution, frame rate, audio channels, and codec information.
• -print_format flat (or -of flat): This is the key argument. It formats the output as a flat list of key-value pairs (e.g., streams.stream.0.codec_name="h264"), which is ideal for grep filtering or bash scripting.
• input.mp4: Replace this with the path to your video file.

Saving the Output to a File

If you want to save the flat metadata to a text file for later use, redirect the output using the > operator:

ffprobe -v error -show_format -show_streams -print_format flat input.mp4 > metadata.txt

Filtering Specific Metadata

The flat format makes it easy to filter for specific properties using standard command-line tools like grep. For example, to find only the width and height of the video, run:

ffprobe -v error -show_streams -print_format flat input.mp4 | grep -E 'width|height'