video4web ffmpeg mp4 webvideo web

ffmpeg.md

Scale to height 320

ffmpeg -i input.mp4 -vf scale=-2:320 output.mp4

video4web.sh

#!/bin/bash

# Generates a cover image along with mute web-ready WebM and MP4 files for each master video in a folder.
# See: https://gist.github.com/jaydenseric/220c785d6289bcfd7366.

# Parameter 1: Input video format (e.g. "mov").
# Parameter 2: Output width in pixels (e.g. "1280").
# Example use: "./video4web.sh mov 1280".

mkdir web
rm -rf web/*

for i in *.$1
do
  # Generate cover image
  ffmpeg -i $i -vframes 1 -vf scale=$2:-2 -q:v 1 web/${i%$1}jpg
  # Generate WebM
  ffmpeg -i $i -c:v libvpx -qmin 0 -qmax 25 -crf 4 -b:v 1M -vf scale=$2:-2 -an -threads 0 web/${i%$1}webm
  # Generate MP4
  ffmpeg -i $i -c:v libx264 -pix_fmt yuv420p -profile:v baseline -level 3.0 -crf 22 -preset veryslow -vf scale=$2:-2 -an -movflags +faststart -threads 0 web/${i%$1}mp4
done