gistfile1.txt

#!/bin/bash

if test -z "$1" -o -z "$2"; then
  echo "Usage $0 <input> <output>"
  exit 1
fi

in="$1"
out="$2"

gst-launch-1.0 \
  filesrc location="$in" ! decodebin name=d \
  mp4mux name=m ! filesink location="$out" \
  d. ! queue ! progressreport ! videoconvert ! x264enc ! queue ! m.video_0 \
  d. ! queue max-size-buffers=0 max-size-bytes=0 max-size-time=0 !  audioconvert ! audioresample ! voaacenc ! aacparse ! queue ! m.audio_0