[SOLVED] Making a movie from stills in CentOS

RandomTroll · 08-19-2020, 03:12 PM

I have a series of webcam photos I want to string together to make a short film. I'm a Slackware user, have used mencoder and ffmpeg. The system is CentOS though. I ran

Code:

 yum whatprovides mencoder

and

Code:

 yum whatprovides ffmpeg

, which turn up nothing. (Surprising me.) Have I made a mistake in my search, or should I use something else?

boughtonp · 08-19-2020, 03:19 PM

Quote:

Originally Posted by RandomTroll

Have I made a mistake in my search

You need to add another repository - various explanations at the other end of https://duckduckgo.com/?q=centos+ffmpeg and https://duckduckgo.com/?q=centos+mencoder

teckk · 08-19-2020, 03:36 PM

Quote:

I have a series of webcam photos I want to string together to make a short film

After you get ffmpeg installed.

A few examples:

Make vid from directory of images, 5 second duration on each, 30fps.

Code:

ffmpeg -framerate 1/5 -pattern_type glob -i '*.png' -c:v libx264 -crf 18 -preset slow -r 30 -pix_fmt yuv420p out.mp4

Make vid from images of different size, pad and center, into a 1280x720 video.

Code:

ffmpeg -framerate 1/5 -pattern_type glob -i '*.png' -vf scale=-1:-1,pad=1280:720:ow-iw/2:oh-ih/2 -c:v libx264 -crf 18 -preset slow -r 30 -pix_fmt yuv420p out.mp4

Make vid from 1 image and 30 second audio file

Code:

ffmpeg -i AudioFile.m4a -loop 1 -t 00:00:30 -i Image.png -c:a copy -c:v libx264 -crf 18 -preset slow -r 30 -pix_fmt yuv420p Out.mp4

Make vid from 1 image and 40 min audio, overlay run time on video

Code:

ffmpeg -i input.mp3 -loop 1 -t 00:40:00 -i input.png -c:a copy -c:v libx264 -crf 18 -preset slow -r 30 -pix_fmt yuv420p -vf "drawtext=text='%{pts\:hms}': x=(w-tw)/2: y=h-(2*lh): fontcolor=white: fontsize=50: box=1: boxcolor=0x00000099" Out.mp4

etc.

henderson · 08-20-2020, 01:38 AM

Hello RandomTroll, I recommend to use Ubuntu for this, it works like a charm!

RandomTroll · 08-22-2020, 11:17 AM

Quote:

Originally Posted by boughtonp

You need to add another repository

Thanks. I have no choice of distribution on this system - I just work on it. Unfortunately it's old (in interest of security) and I couldn't reconcile modern packages with it. I ended up downloading the source and building.

RandomTroll · 08-23-2020, 05:16 AM

Hey, @teckk, I want to make a movie from the last 24 hours' of images for a webcam. I tried:

Code:

 ffmpeg -pattern-type glob -framerate 24 -i 'ls -tr camera*.jpg | tail -360' camera.avi

but it didn't interpret 'ls -tr camera*.jpg | tail -360'. I ended up with:

Code:

FileList=`ls -tr camera*.jpg | tail -360 | tr '\n' '#' | sed 's/#/ -i /g'
ffmpeg -pattern-type glob -framerate 24 -i $FileList end.jpg camera.avi

but that seemed really inelegant.

teckk · 08-23-2020, 01:55 PM

Code:

#Example make a dir and change to it.
mkdir pic
cd ~/pic

#Make 50 .jpg file names into the dir
for i in {1..50}; do
    touch camera"$i".jpg
done

Code:

#This is not sorted
ls -tr camera*.jpg | tail -10 | tr '\n' '#' | sed 's/#/ -i /g'
camera39.jpg -i camera44.jpg -i camera43.jpg -i camera42.jpg -i camera47.jpg -i camera46.jpg -i camera45.jpg -i camera50.jpg -i camera49.jpg -i camera48.jpg -i

How about:

Code:

#Make array of files in dir, sorted by number
for file in *; do
    sorted=$(echo "$file")
    files[$sorted]="$file"
done

#Check it
echo "${files[@]}"

#Get the last 10
last10=$(echo "${files[@]:40}")

#Check it
echo "$last10"

henderson · 08-24-2020, 12:58 PM

Quote:

Originally Posted by RandomTroll

Thanks. I have no choice of distribution on this system - I just work on it. Unfortunately it's old (in interest of security) and I couldn't reconcile modern packages with it. I ended up downloading the source and building.

But you can find good movie software on an old system?

RandomTroll · 08-25-2020, 02:59 AM

Trying to use an environment variable for the input argument ran into the maximum size of environment variables, in this case about enough for 300 file names. I ended up making links in a temporary directory:

Code:

for file in `ls -tr camera*.jpg | tail -360`
do
ln -sf ../$file .temp/camera-$count.jpeg
let count=count+1
done

then using -i .temp/camera-%03d.jpeg for the input argument.

henderson · 08-26-2020, 01:56 AM

Quote:

Originally Posted by RandomTroll

Trying to use an environment variable for the input argument ran into the maximum size of environment variables, in this case about enough for 300 file names. I ended up making links in a temporary directory:

Code:

for file in `ls -tr camera*.jpg | tail -360`
do
ln -sf ../$file .temp/camera-$count.jpeg
let count=count+1
done

then using -i .temp/camera-%03d.jpeg for the input argument.

Which software did you install?

teckk · 08-26-2020, 08:58 AM

Quote:

Which software did you install?

Quote:

then using -i .temp/camera-%03d.jpeg for the input argument.

ffmpeg.

Make 20 images of file.mp4, 1 per seond

Code:

ffmpeg -t 00:00:20 -i file.mp4 -s 400x300 -vf fps=1 camera-%03d.jpeg

Make video of those 20 images, each image displays for 2 seconds

Code:

ffmpeg -framerate 1/2 -pattern_type glob -i '*.jpeg' -c:v libx264 -crf 18 -preset slow -r 30 -pix_fmt yuv420p out.mp4