Fortraneries/GravityField/encode.sh

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#!/bin/bash
if [ $# -ne 2 ] ; then
echo
echo "need two arguments:"
echo " 1) source dir"
echo " 2) mp4 filename"
exit 1
fi
SDIR="$1"
FNAME="$2"
echo "Encoding from " $SDIR " to " $FNAME
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#
# trying to guess the format of inoput files
#
firstfile=$(ls -1 $SDIR/* | head -1)
echo "first file :" $firstfile
filetype=$(file $firstfile | awk '{ print $2 }')
echo "file type :" $filetype
case $filetype in
PNG) extension=".png" ;;
Netpbm) extension=".pgm" ;;
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*) extension=".pnm" ;;
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esac
echo "extension :" $extension
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TITLE=$(printf -- '---{ experimental gravity field %d }---' $$)
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ffmpeg -nostdin \
-loglevel warning \
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-y -r 30 -f image2 -i ${SDIR}/%05d${extension} \
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-metadata artist='---{ tTh }---' \
-metadata title="${TITLE}" \
-c:v libx264 -pix_fmt yuv420p \
$FNAME
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echo $FNAME ' ..... [done]'
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