[FFmpeg-user] Question about ffmpeg

Fedor van der Lee f.vanderlee at leudal.nl
Wed Jan 21 11:53:50 CET 2015

Yeah, this solution seems to work perfectly, I can keep repeating the commandline in a batch and create a huge image.
Thanks everyone.


-----Oorspronkelijk bericht-----
Van: ffmpeg-user-bounces at ffmpeg.org [mailto:ffmpeg-user-bounces at ffmpeg.org] Namens Moritz Barsnick
Verzonden: woensdag 21 januari 2015 10:50
Aan: FFmpeg user discussions
Onderwerp: Re: [FFmpeg-user] Question about ffmpeg

On Wed, Jan 21, 2015 at 03:42:36 -0500, Marcus Johnson wrote:
> Your question interested me, so I googled around and found that FFmpeg 
> can in fact do this with Tile=1x2, although I'm having trouble getting 
> FFmpeg to work with the file names properly.

The tile filter takes one input stream and overlays subsequents images.
Using it, you would do something like this:

$ ffmpeg -i in1.jpg -i in2.jpg -filter_complex "[0:v][1:v]concat,tile=1x2[tiled]" -map "[tiled]" tiled.jpg

I.e. concatenate two images as two streams into subsequent images in one stream, and then tile them.

(Sorry if this works with "-vf". I only managed with "-filter_complex.) (Sorry 2 if this has issues with images of changing size. I can't take  all corner cases into account. ;-))

You can also use the overlay filter: Pad one image (stream) to double its size, and lay the other over the empty space.

$ ffmpeg -i in1.jpg -i in2.jpg -filter_complex "[0:v]pad=h=2*ih:w=iw:x=0:y=0[pad]; [pad][1:v]overlay=x=0:y=h[tiled]" -map "[tiled]" tiled2.jpg

(You need to solve some colorspace issues though, ffmpeg warns and the result looks shifted.)

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