FFMPEG from Zero to Hero

#1

Post by wilsonfiifi » Sat, Mar 06, 2021, 9:32 PM UTC

FFMPEG from Zero to Hero
ffmpegfromzerotohero.com

Re: FFMPEG from Zero to Hero

#2

Post by Confiks » Sat, Mar 06, 2021, 10:37 PM UTC

Might have come in handy while I was struggling to type out

    ffmpeg -i part0.mp4 -i part1.mp4 -filter_complex "[1:v]scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2[v1]; [0:v] [0:a] [v1] [1:a] concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" out.mp4

to concatenate two videos with different sizes today.

My relation with it is almost identical to my relation with any bash scripting more than a one-liner: I have to relearn it every time I want to engage with it.

Re: FFMPEG from Zero to Hero

#3

Post by abnry » Sat, Mar 06, 2021, 10:59 PM UTC

I feel like someone should teach a course on how to use the grouping of command line applications: convert (image magick), pdftk, pandoc, and ffmpeg.

Lots of power to be had in mastering them.

Re: FFMPEG from Zero to Hero

#4

Post by hardwaregeek » Sat, Mar 06, 2021, 11:00 PM UTC

If this book does what it claims to do, it should probably cost more (pls raise the price after I buy it). I strongly believe that inside ffmpeg may be the secret to the cosmos, the universe and life itself

Re: FFMPEG from Zero to Hero

#5

Post by ttoinou » Sat, Mar 06, 2021, 11:03 PM UTC

    FFMPEG stands for “Fast-Forward-Moving-Picture-Experts-Group”.

Are we sure FF doesnt stand for "Free Frame" ? I think in the 90s there were a lot of projects with this ff prefix

Re: FFMPEG from Zero to Hero

#6

Post by ijlx » Sat, Mar 06, 2021, 11:15 PM UTC

ttoinou wrote: post #5

FFMPEG stands for “Fast-Forward-Moving-Picture-Experts-Group”. Are we sure FF doesnt stand for "Free Frame" ? I think in the 90s there were a lot of projects with this ff prefix

Not in this case: https://ffmpeg.org/pipermail/ffmpeg-devel/2006-February/0103...

Re: FFMPEG from Zero to Hero

#7

Post by danaliv » Sat, Mar 06, 2021, 11:16 PM UTC

hardwaregeek wrote: post #4

If this book does what it claims to do, it should probably cost more (pls raise the price after I buy it). I strongly believe that inside ffmpeg may be the secret to the cosmos, the universe and life itself

I just had to tangle with ffmpeg to stream some video from a spacecraft. I’m genuinely undecided as to which end of that problem was the more complicated one.

Re: FFMPEG from Zero to Hero

#8

Post by hprotagonist » Sat, Mar 06, 2021, 11:24 PM UTC

abnry wrote: post #3

I feel like someone should teach a course on how to use the grouping of command line applications: convert (image magick), pdftk, pandoc, and ffmpeg. Lots of power to be had in mastering them.

type command.

roll face on keyboard.

hit enter.

repeat until results look good!

Re: FFMPEG from Zero to Hero

#9

Post by whateveracct » Sat, Mar 06, 2021, 11:24 PM UTC

Confiks wrote: post #2

Might have come in handy while I was struggling to type out ffmpeg -i part0.mp4 -i part1.mp4 -filter_complex "[1:v]scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2[v1]; [0:v] [0:a] [v1] [1:a] concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" out.mp4 to concatenate two videos with different sizes today. My relation with it is almost identical to my relation with any bash scripting m…

Feels like a nice & typed Haskell eDSL on top of ffmpeg would be helpful.

Re: FFMPEG from Zero to Hero

#10

Post by the_only_law » Sat, Mar 06, 2021, 11:27 PM UTC

ffmpeg is really useful, but isn't doing some of these things on a CPU really inefficient? I know there are some offloads for Nvidia GPU’s for some video stuff, but I was under the impression that they used Nvidia’s proprietary libraries that have limited codec support.