1
vote
0answers
336 views

Using avconv to convert an animated gif to mp4 with sound

I want to convert an animated gif and a midi (music) file into a mp4 video. Is it possible? I saw a lot of topics on documentation, foruns and stackexchange sites, but I didn't find. It works with 1 ...
0
votes
1answer
187 views

Normalise levels, contrast, brightness of an image sequence

When making animated gifs or short stop-motion videos from an image sequence, I want them to have all similar levels so that the output looks smooth. It does not have to be a professional quality ...
4
votes
1answer
2k views

Can ImageMagick make thumbnails from video?

I'm trying to extract thumbnails from video via ImageMagick. I found some samples from their official site, but it makes GIF, not PNG. I want a solid thumbnail though. Can it create the same output ...
2
votes
1answer
1k views

generating video slideshow with avconv but maintaining image ratio

This may have already been answered.. but I'm struggling to search for it! I have a set of images, of varying dimensions that I've created a 'fade affect' with, using imagemagicks convert command. ...
3
votes
1answer
683 views

Get crisp, clear thumbnails from MP4 with FFmpeg / ImageMagick

My ultimate goal is to get meaningful snapshots from videos that are either 30 min or 1 hour long. "Meaningful" is a bit ambitious, so I have simplified my requirements. The image should be crisp - ...
0
votes
0answers
226 views

ImageMagick video filter for FFmpeg

I'd like to apply some non-trival video operations on a per-frame base. So far, I've been using shell scripts + ImageMagick + FFmpeg, decomposing the video into individual frames on disk, processing ...
1
vote
2answers
1k views

lossless PNG to video in Imagemagick

As an intermediate step in creating an animation, I need to put a bunch of sequential PNGs into a movie file. I tried ffmpeg but was getting compression and artifacting even when I set quality to ...
1
vote
2answers
375 views

Video from Frames at the OS X Command Line or Python?

I am looking for a good way to turn a stack of images into a video on the command line or python. Here is my setup: OS X 10.6 Sequence of images either in png or pdf format. (i.e. 001.png, ...