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quick hack: turn a bunch of images into a video slideshow
#!/bin/bash
# Takes all images given as parameters, and makes a video slideshow out of them.
# Note that the images are ordered lexicographically, regardless of the order in
# which they are given.
# Output Parameters:
SLIDE_SECONDS=4
SIZE_WIDTH=640
SIZE_HEIGHT=480
OUTPUT_FILE="output-mpeg4.avi"
function die()
{
exit_status=$1
die_message=$2
if [[ $exit_status != 0 ]]
then
echo "$die_message"
exit 1
fi
}
if [[ $# == 0 ]]
then
echo "no input files"
exit 1
fi
if [ -e "$OUTPUT_FILE" ]
then
echo "refusing to overwrite $OUTPUT_FILE"
exit 1
fi
echo "Creating temp dir..."
mkdir tmp
die $? "mkdir failed"
echo "Resizing images..."
SIZE="${SIZE_WIDTH}x${SIZE_HEIGHT}"
for img in $@
do
echo "$img..."
convert "$img" -auto-orient -resize $SIZE -gravity center \
-background black -extent $SIZE "tmp/$img"
# the -auto-orient option handles EXIF rotation
die $? "convert failed"
done
echo "Creating video slideshow..."
FPS=$(echo "scale=3; 1.0/$SLIDE_SECONDS" |bc)
mencoder mf://tmp/* -mf fps=$FPS -ovc lavc -lavcopts vcodec=mpeg4 \
-o "$OUTPUT_FILE" >tmp/mencoder.log 2>&1
die $? "mencoder failed"
echo "Cleaning up..."
for img in $@
do
rm "tmp/$img"
die $? "rm failed"
done
rm tmp/mencoder.log
die $? "rm failed"
rmdir tmp
die $? "rmdir failed"
echo "Done! Output is in $OUTPUT_FILE"
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