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vid2gif: add fps option and fix errors for missing start and duration
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scritps/vid2gif
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scritps/vid2gif
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"\noptions:" \
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"\t-S TIMESTAMP - timestamp to start the gif" \
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"\t-d SECONDS - how long the gif should be" \
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"\t-f FPS - framerate of the gif" \
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"\t-o FILE - output file (default: out.gif)" \
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"\t-s SCALE - border size (default: 1)"
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}
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case $arg in
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S ) VID2GIF_START=$1; shift ;;
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d ) VID2GIF_DURATION=$1; shift ;;
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f ) VID2GIF_FPS=$1; shift ;;
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h ) usage; exit 0 ;;
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i ) VID2GIF_INPUT_FILE=$1; shift ;;
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o ) VID2GIF_OUTPUT_FILE=$1; shift ;;
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usage 1>&2; exit 1
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}
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start=
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duration=
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[ -n "$VID2GIF_START" ] && start="-ss"
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[ -n "$VID2GIF_DURATION" ] && duration="-t"
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fps=
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[ -n "$VID2GIF_FPS" ] && fps="fps=$VID2GIF_FPS,"
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: "${VID2GIF_SCALE:=1}"
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: "${VID2GIF_OUTPUT_FILE:=out.gif}"
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filters="scale=iw*${VID2GIF_SCALE}:-1:flags=lanczos"
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filters="${fps}scale=iw*${VID2GIF_SCALE}:-1:flags=lanczos"
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palette_file=$(mktemp --tmpdir XXX.png)
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ffmpeg -hide_banner -loglevel warning \
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"$start" "$VID2GIF_START" \
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"$duration" "$VID2GIF_DURATION" \
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${VID2GIF_START:+"-ss" "$VID2GIF_START"} ${VID2GIF_DURATION:+"-t" "$VID2GIF_DURATION"} \
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-i "$VID2GIF_INPUT_FILE" -vf "$filters,palettegen" -update true \
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-y "$palette_file"
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-y "$palette_file" && \
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ffmpeg -hide_banner -loglevel warning \
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"$start" "$VID2GIF_START" \
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"$duration" "$VID2GIF_DURATION" \
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${VID2GIF_START:+"-ss" "$VID2GIF_START"} ${VID2GIF_DURATION:+"-t" "$VID2GIF_DURATION"} \
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-i "$VID2GIF_INPUT_FILE" -i "$palette_file" -filter_complex "$filters,paletteuse" \
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"$VID2GIF_OUTPUT_FILE"
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