This book is dope, all the jargon is explained and there is an example for everything!
FFMPEG from Zero to Hero
21–30 of 140 posts
Re: FFMPEG from Zero to Hero
#22Might 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…
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Re: FFMPEG from Zero to Hero
#23ffmpeg is the most intimidating piece of software ever crafted, and it’s not even close
Re: FFMPEG from Zero to Hero
#24ffmpeg is a command designed to keep me grounded. I rely on a recipe to convert FTA TS mpeg streams to an mp4 compression I can tolerate, for my digital pvr stash of free-to-air movies.
Handbrake worked too, sometimes easier for things like 4:3 deletterbox or ad removal or b&w restoration on colourised screening.
I still use mpeg_streamclip for some things. I used to use an Italian PhD students Java tool to fix TS flags without explicitly reencoding. ffmpeg can probably do all the things I am doing, if I look harder.
I have no idea what most of the options mean beyond bullshitting, and I rely on the wisdom of others "try adding this option"
It's digital alchemy. Do not offend Yagoth, incanting for Morgoth. The candles are optional but the goat skull is not: i tried removing the -a: option but something broke.
Re: FFMPEG from Zero to Hero
#25ffmpeg is the most intimidating piece of software ever crafted, and it’s not even close
imagemagick is close for me, but I do use ffmpeg and magick often, but as others have said feel as though I have to relearn each as soon as I have do something nonbasic.
Re: FFMPEG from Zero to Hero
#26After seeing some posts here on HN about FFMPEG I tried looking into green-screen joining two Twitch streams together.
Sometimes a streamer wants to overlay his stream with a tournament channel, but because of copyright they can't. It'd be nice to have an easy way to set that up, if twitch won't do it on their end the user can do it themselves
Re: FFMPEG from Zero to Hero
#27Might 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…
I just grep through my bash history ;)
I have a $HOME/bin folder full of bash scripts invoking imagemagick or ffmpeg one liners.
Re: FFMPEG from Zero to Hero
#28I'm convinced, but their google pay seems to time out on my phone. Will try again later, but if the rest of the book is like the first chapter it's well worth it.
Re: FFMPEG from Zero to Hero
#29Might 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…
I remember when mencoder wasn't just a frontend for ffmpeg, I literally just saved a text file with the ridiculous command required to convert a DVD to an avi.
Their man page even had a like three line long example for basic stuff. ffmpeg is at least a bit more consistent with syntax though only barely!
Re: FFMPEG from Zero to Hero
#30Might 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…
I never had to use it since I never had anything complicated enough, but next time you relearn things, I've heard good things about ffmpeg-python [0] , it supports multiple inputs, outputs, custom filters, etc.
Their example from the readme:
ffmpeg -i input.mp4 -i overlay.png -filter_complex "[0]trim=start_frame=10:end_frame=20[v0];\
[0]trim=start_frame=30:end_frame=40[v1];[v0][v1]concat=n=2[v2];[1]hflip[v3];\
[v2][v3]overlay=eof_action=repeat[v4];[v4]drawbox=50:50:120:120:red:t=5[v5]"\
-map [v5] output.mp4
import ffmpeg
in_file = ffmpeg.input('input.mp4')
overlay_file = ffmpeg.input('overlay.png')
(
ffmpeg
.concat(
in_file.trim(start_frame=10, end_frame=20),
in_file.trim(start_frame=30, end_frame=40),
)
.overlay(overlay_file.hflip())
.drawbox(50, 50, 120, 120, color='red', thickness=5)
.output('out.mp4')
.run()
)