Append image to an existing movie

[bene...@gmail.com]

Hey guys,

I'm quite new with imageio. Is it possible to append an image to an existing video? I'm trying to write a script to create a time-lapse video by grabbing images from my security camera.

My code looks like this:

image = imageio.imread(response.body, "jpg")

with imageio.get_writer('output/debug.mkv', mode="I") as writer:

    writer.append_data(image)

This overwrites the movie every time there's a new append_data call. I could store the writer when the script start, but because my script should run for days and months, it should be resistant to restarts.

Any ideas how I could do it? I'm also checking out the ffmpeg concatenate wiki page, but it's quite cryptic to me... :/

Any help would be appreciated!

Tivadar

[Almar Klein]

My knowledge of the FFMPEG CLI options is not that great; I am not even sure whether this is possible. Would it work for your application if you'd write different video files and concatenate them afterwards?

Regards,
  Almar

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[Almar Klein]

Great!

If you do find out how to do it with ffmpeg (i.e. know what parameters to apply) you/we/I could check whether it is possible to make appending possible with imageio. I do think it is an interesting use-case.

- Almar

On 22/03/2018 15:11, bene...@gmail.com wrote:

That's what i'm thinking about too.

What i'm doing right now is timestamping the created movie and append as much picture as i just can (until a shutdown). If a timelapse will be saved into more than one move, i can concatenate them by hand, or i have time to figure out how i can automate it... :)

(I wasn't complaining as imageio isn't advertised itself that it can do it.)

Thank you for this great tool, i'm more than happy to use it!

Tivadar

[bene...@gmail.com]

imageio will pass the -y option to ffmpeg, the other option is -n to to do not overwrite, but exit when the output file is already exists... :)

So I see no possible way to make one video in one pass. At least with ffmpeg.