Make animated videos with soundtracks NFT collection about hashlips_art_engine HOT 8 CLOSED

You can achieve this with ffmpeg:

ffmpeg -i video.mkv -i audio.mp3 -map 0 -map 1:a -c:v copy -shortest output.mkv

Where video.mkv is the video file and audio.mp3 is the audio file. You can then prepare a simple bash script to combine random videos with random audio files.

However, if you want to combine different video layers, then obviously you need some sort of alpha channel information, or a chroma key, which requires a lot more preparation on the video file side (you'd have to use the correct chroma key in your video files and then provide it to the script).

You can then use the colorkey filter:

ffmpeg -i video.mkv -i  overlay-video.mkv -filter_complex '[1:v]colorkey=0xYOUR_COLOR:YOUR_SIMILARITY_VALUE:YOUR_BLEND_VALUE[ckout];[0:v][ckout]overlay[out]' -map '[out]' output.mkv

So by combining the above you should be able to achieve what you want.

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Hello, @MaciekBaron @HashLips

Is there a way to combine multiple animated GIF using the same script? The idea is to merge several animated GIF into one; resulting in an animated GIF with all the different looping sequences.

Any tip on how to get that done, please?

Thanks in advance.

TM.

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If you mean merging GIFs sequentially there's Gifsicle that allows you to do it in the command line by simply doing:

gifsicle 1.gif 2.gif 3.gif > merged.gif

So all you need is a simple script that changes the order or the selection of the GIFs.

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Thanks, for the feedback @MaciekBaron. Appreciate it.

I meant using GIFs with alpha channels in the art engine and combining them in layers, not sequentially.

So in this case, layer 1 will be 1.gif, layer 2 will be 2.gif and so on.

So we have 1 GIF with all the different animated GIFs on different layers.

Once again, thanks for the feedback.

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I wouldn't necessarily recommend this, as GIFs have limited colour palettes and differ in frame rates.

However, you can also use ffmpeg for that, you could look into the overlay filter to overlay two source gifs on top of each other, similarly to what I did in the first example.

I think it could look something like this, although I haven't tried it:

ffmpeg -t DURATION_HERE -i gifone.gif -i giftwo.gif -filter_complex "[0][1]overlay=0:0" -vf "fps=10,scale=320:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0 output.gif

It's best if you read the docs for this to get it right, but basically after -vf you want to use those options and set the appropriate framerate you want, and after -filter_complex you define your overlay.

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Sounds Great. Thanks

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I don't want videos but animated png or gifs as output. There's an issue about it #461. Do you think this solution can help around it in some way?

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@PradhumnaPancholi: ffmpeg supports both apng and gif output. See my comment above.

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