Comments on: Video Encoding Script

By: Sean

Sean — Wed, 04 Jan 2012 17:30:10 +0000

What an excellent script! You have saved me a lot of time and effort in working out how to get this done and for that I thank you!

By: George Helyar

George Helyar — Mon, 13 Sep 2010 21:07:58 +0000

That is outside of the scope of this script.

This script simplifies video encoding using ffmpeg, x264, faac and an mp4 container. Specifically, it simplifies it by drastically reducing the command line arguments you need to enter, batching multiple files to encode and automatically calculating bitrates to target a given file size e.g. to fit on a CD and play in a Blu-ray player or computer.

By: a,alex

a,alex — Mon, 13 Sep 2010 18:25:10 +0000

hi, is there a chance you can add flvtool meta injection for mp4 clips and automate the entire process with cron ?

By: George Helyar

George Helyar — Tue, 10 Aug 2010 20:52:47 +0000

No, the tmp file is not used by the second pass at all and can even be deleted safely before the second pass.

Only the log file (and other similar files) are used by the second pass, as well as the original input media of course.

The script does not delete anything. You have to clean it up yourself.

If you still have the log and need to make changes such as choosing a different audio stream, you may be able to skip the first pass and run only the second pass again.

By: Matt

Matt — Tue, 10 Aug 2010 20:07:08 +0000

Erm, I don’t know if this is a bug but it seems to act weird when it does the 2 passes. Here’s an example of the commands it sends out..

ffmpeg -i 1.VOB -pass 1 -an -vcodec libx264 -vpre fastfirstpass -b 378744 -bt 378744 -threads 0 -y -f mp4 pass1.tmp
ffmpeg -i 1.VOB -pass 2 -acodec libfaac -ac 2 -ab 128k -vcodec libx264 -vpre hq -b 378744 -bt 378744 -threads 0 -y 1.VOB.mp4

is it supposed to input from A to pass1.tmp and then from A to B? Shouldn’t it be A to tmp then tmp to B.

Another thing. It doesn’t get rid of pass1.tmp when it finishes.