mirror of
https://github.com/genxium/DelayNoMore
synced 2024-12-25 11:18:55 +00:00
29 lines
1.1 KiB
Markdown
29 lines
1.1 KiB
Markdown
# Double playback speed of a video
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```
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ffmpeg -i input.mp4 -filter:v "setpts=0.5*PTS" output.mp4
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```
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# GIF creation cmd reference
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```
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ffmpeg -ss 12 -t 13 -i input.mp4 -vf "fps=10,scale=480:-1" -loop 0 output.gif
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```
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# Extract GIF (with alpha channel, e.g. exported from Fighter Factory Studio) to PNG sequence
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```
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ffmpeg -vsync vfr -i input.gif output%d.png
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```
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The `-vsync vfr` tells ffmpeg to disrespect the original delays set within the GIF file, otherwise many duplicate frame will be extracted by the default 60FPS.
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More complicated transparent padding example (used when alignment in image source is much more preferred than aligning in codes)
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```
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ffmpeg -vsync vfr -i LayDown1.gif -vf "scale=iw:188:force_original_aspect_ratio=decrease,pad=iw:188:0:(oh-ih):color=#00000000,format=rgba" pngs/LayDown1_%d.png
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```
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The command above uses same input-output width, but pads the output height with a top transparent section such that the output height is fixed to 188px.
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Similarly to crop a gif into pngs.
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```
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ffmpeg -vsync vfr -i Idle1.gif -vf "crop=70:ih:(iw-ow-10):0" pngs/Idle1_%d.png
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```
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