30 lines
826 B
Python
30 lines
826 B
Python
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import base64
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from pathlib import Path
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import json
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import subprocess
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import sys
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fps = 5
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infile = Path(sys.argv[1])
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with open(infile) as f:
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data = json.load(f)
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fps = data['fps']
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duration = data['duration']
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frames = data['frames']
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print(len(frames))
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for i,frame in enumerate(frames):
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print(i)
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pngdir = Path('pngs')
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pngdir.mkdir(exist_ok=True)
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filename = Path(f'frame-{i:04d}.png')
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pngname = pngdir / filename
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with open(pngname, 'wb') as f:
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png = base64.b64decode(frame[len('data:image/png;base64,'):])
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f.write(png)
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outfile = Path(infile.name).with_suffix('.mp4')
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subprocess.run(['ffmpeg','-r',str(fps),'-f','image2','-i','pngs/frame-%04d.png','-vcodec','libx264','-crf','25','-pix_fmt','yuv420p','-vf','pad=ceil(iw/2)*2:ceil(ih/2)*2',outfile,'-y']);
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