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1.1 kB · 35 lines
Shell
at fable51/moq
123456789101112131415161718192021222324252627282930313233343536#!/bin/bash
# Generates a video with a sine wave that loops 60 times for testing the segmenter and whatnot
set -euo pipefail
DURATION="${DURATION:-60}"WIDTH="${WIDTH:-1280}"HEIGHT="${HEIGHT:-720}"HALF_HEIGHT=$((HEIGHT / 2))
ffmpeg -y \ -f lavfi -i "aevalsrc=0.125 * sin(2 * PI * (150+(800*mod(t\,1))) * mod(t\,1)):sample_rate=48000" \ -filter_complex " color=c=green:s=${WIDTH}x${HALF_HEIGHT}:r=60:d=${DURATION},format=yuv420p[green]; color=c=blue:s=${WIDTH}x${HALF_HEIGHT}:r=60:d=${DURATION},format=yuv420p[blue]; [green][blue]overlay=x='mod(((n-1)/60),1)*(overlay_w+(overlay_w/60)+1)'[colorfade]; [0:a]asplit[audio][audio2]; [audio2]showwaves=split_channels=1:s=${WIDTH}x${HALF_HEIGHT}:rate=25,fps=60[waveform]; [colorfade][waveform]vstack[video]; " \ -map "[video]" \ -map "[audio]" \ -c:v libx264 \ -preset ultrafast \ -g 60 \ -keyint_min 60 \ -x264-params "keyint=60:scenecut=0:bframes=0" \ -crf 23 \ -c:a libopus \ -b:a 128k \ -t "${DURATION}" \ output_looped.mp4
ffplay output_looped.mp4