AutomatorFFmpeg

efine playlist bookmarks.

x264 Guides:
x264 encoding
x264 to ffmpeg mapping
FFmpeg Guides:
FFmpeg Tips

External Links:
FFmpeg x264 encoding guide
Ubuntu FFmpeg and x264 install guide
x264 settings

Apple Format Conversions
Device Screen Resolution Command
iPhone / iPod Touch / iPod Nano / iPod Classic 320×480 ffmpeg -i INPUT-acodec aac -ac 2 -ab 160k -s 480x320 -vcodec libx264 -vpre slow -vpre iPod640 -b 1200k -f mp4 -threads 0 OUTPUT
iPhone 4 / iPod Touch 4 640×480 ffmpeg -i INPUT-acodec aac -ac 2 -ab 160k -s 640x480 -vcodec libx264 -vpre slow -vpre iPod640 -b 1200k -f mp4 -threads 0 OUTPUT
iPad 1024×768 ffmpeg -i INPUT-acodec aac -ac 2 -ab 160k -s 1024x768 -vcodec libx264 -vpre slow -vpre iPod640 -b 1200k -f mp4 -threads 0 OUTPUT
Apple Universal 1280×720 ffmpeg -i INPUT-acodec aac -ac 2 -ab 160k -s 1080x720 -vcodec libx264 -vpre slow -vpre iPod640 -b 1200k -f mp4 -threads 0 OUTPUT

ffmpeg short guide

Supported input formats

$ ffmpeg -formats

Sub-clip Creation

$ ffmpeg -i input_file -ss timecode -t timecode -vcodec copy -acodec copy output_file

trim split media

how can i merge two files with ffmpeg?
The best way I have been able to do this with ffmpeg is bite the bullet and convert to mpg and then merge them.

Code:

#convert all to mpg
for k in 1 2 3 4
do
ffmpeg -i ${k}.wmv -sameq ${k}.mpg
done

#combine mpg files
cat *.mpg |\ffmpeg -i - -sameq $destdir${i}.mpg

merge, join, cat, concatenate

With the release of the iPhone OS 3 update came the ability to do live streaming. There are a few types of streaming and each requires a certain encoding and segmentation. I've put together a cheat sheet on how I went about building a static stream using FFMpeg and an example segmenter that someone has posted. I'm not covering windowed streams in this post but if you are thinking about implementing a windowed stream the following will help you make a step in that direction.

Before getting started it is best to read over the Apple documentation on HTTP live streaming. Start out with the iPhone streaming media overview. This document covers the basics of how the streaming works and has some nice diagrams.

segmenter apple

darwinstreamingserver