ffmpeg different size .jpg to .mp4

mount.nfs · 03-29-2022, 11:57 PM

Code:

./ffmpeg -r 0.3 -i %2d.jpg output.mp4

inputs 01.jpg, 02.jpg, 03.jpg, 04.jpg...

above command drop frames with size -s different .jpg

.jpg are size -s x*y different

please say what options missing command?

-vf pad=a:b:c:d

ondoho · 03-30-2022, 12:45 AM

Quote:

Originally Posted by mount.nfs

Code:

./ffmpeg -r 0.3 -i %2d.jpg output.mp4

inputs 01.jpg, 02.jpg, 03.jpg, 04.jpg...

above command drop frames with size -s different .jpg

.jpg are size -s x*y different

please say what options missing command?

I don't understand, esp. "above command drop frames with size -s different .jpg". What do you want to achieve, what is failing?

mount.nfs · 03-30-2022, 04:47 AM

If I
-vf pad=a:b:c:d
.jpg one by one
then need to repeate many

I want some .jpg to a .mp4
and .jpg are in different resolutions

deprecated pixel format used, set range correctly

computersavvy · 03-30-2022, 10:58 AM

Simple solution.

First parse the files with ffmpeg and set all at the same resolution & size, then use ffmpeg to create the mp4. A simple script to process the files one at a time would handle that with only the delay needed for the sizing.

It can be done in a single pass but is much easier if you do one thing at a time and not jumping back and forth between tasks.

mount.nfs · 03-30-2022, 01:32 PM

Code:

./ffmpeg -r 0.3 -i %2d.jpg -vf pad=a:b:c:d output.mp4

teckk · 03-30-2022, 03:45 PM

If the jpeg's are different size, then find the largest one and make the video that size, pad the rest of the jpegs to that size. Or pad all of them to a size larger than the largest jpeg.

Example where largest jpeg is 1000x600. Pad all the rest to that size. Images show for 5 seconds, 30 fps x264 mp4.

Code:

ffmpeg -framerate 1/5 -pattern_type glob -i '*.jpg' -vf scale=-1:-1,pad=1000:600:ow-iw/2:oh-ih/2 -c:v libx264 -crf 18 -preset slow -r 30 -pix_fmt yuv420p out.mp4

There are about 10 other ways to do that with ffmpeg.

Edit:
That will pad and center the smaller ones. Size them to 1000x600

mount.nfs · 04-08-2022, 06:42 PM

Code:

./ffmpeg -r 15 -i %2d.jpg output.mpeg

Code:

MPEG-1/2 does not support 15/1 fps

I tried the examples you give post #6

After more than a week, I reply with .mpeg problem

ondoho · 04-08-2022, 11:54 PM

^ well don't use .mpeg then.
Nobody suggested it, either.
Use .mp4, .mkv

(the name "ffmpeg" is somewhat historical at this point)

It looks like you aren't actually using the examples you're given?

I'm still a bit unsure what you're trying to achive there (some sort of slideshow as a movie, I guess), but generally speaking:
keep in mind that in ffmpeg it matters where you put command line options - before the input file, or before the output file.

teckk · 04-09-2022, 02:32 PM

Got an image sequence.
https://www.signiant.com/wp-content/...s-1024x631.jpg

Code:

curl https://www.signiant.com/wp-content/uploads/2019/09/The_Horse_in_Motion_high_res-1024x631.jpg -o horse.jpg

Used scrot to cut it into 12 images. Didn't take the time to do a neat job.

Code:

scrot -s

Then made a slow animation with them

Code:

ffmpeg -framerate 1/.2 -i horse%d.png  -vf scale=-1:-1,pad=250:168:ow-iw/2:oh-ih/2 -c:v libx264 -crf 18 -preset slow -r 24 -pix_fmt yuv420p out.mp4

Looks like this
https://0x0.st/obln.mp4

teckk · 04-09-2022, 02:37 PM

You could make that longer. I didn't spend much time with this. Do as good as you wish.

cat confile

Code:

file 'out.mp4'
file 'out.mp4'
file 'out.mp4'
file 'out.mp4'

Code:

ffmpeg -f concat -i confile -c:a copy -c:v copy longer.mp4

https://0x0.st/oblF.mp4