run2-ffmpeg-extraction

name	run2_ffmpeg_extraction
description	Advanced FFmpeg techniques for keyframe extraction with quality control.

Advanced FFmpeg Keyframe Extraction

Extract only the keyframes (I-frames) from a video. This is much faster than extracting every frame and provides the most significant images.

Basic Usage

ffmpeg -i input.mp4 -vf "select='eq(pict_type,I)'" -vsync vfr output_%03d.png

Quality Control

If you need high quality JPEGs instead of PNGs:

ffmpeg -i input.mp4 -vf "select='eq(pict_type,I)'" -vsync vfr -q:v 2 output_%03d.jpg

(where -q:v 2 is high quality, range 1-31).

Parameters Explained

• -vf "select='eq(pict_type,I)'": Filters for Intra-coded frames (keyframes).
• -vsync vfr: Variable Frame Rate, ensures we don't get duplicate frames if keyframe intervals vary.
• output_%03d.png: Standard printf-style naming for sequences.