commit 469296142ed571c3e38749a234a9eb31205645ac parent 9712aec3da3a8dd8e17f8626c138ae12c26e9c8c Author: Anders Damsgaard <anders@adamsgaard.dk> Date: Sun, 16 Aug 2020 21:33:26 +0200 Put image->video processing into separate script Diffstat:
| A | brtv-imgs-to-video.sh | | | 78 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 78 insertions(+), 0 deletions(-)
diff --git a/brtv-imgs-to-video.sh b/brtv-imgs-to-video.sh @@ -0,0 +1,78 @@ +#!/bin/sh +# read hashtags.txt as stdin, download all images, and convert them to videos +# requirements: hurl(1), ffmpeg(1), convert(1) + + +### CONFIGURATION START + +# dir to contain images as videos +out_dir="img2vid" + +# ffmpeg flags for generated videos +video_ext="webm" +ffmpeg_codec="-loglevel error -acodec libopus -b:a 96K -vcodec libvpx -b:v 64k -f webm -vf scale=1280:-1 -r 30 -ac 2" + +# target video resolution +video_resolution=1280x720 + +# slide style +bgcolor=magenta + +# show image memes for this duration [s] +image_display_time=10 + +### CONFIGURATION END + + +die() { + printf '%s: error: %s\n' "${0##*/}" "$1" >&2 + exit 1 +} + +regeximatch() { + printf '%s' "$1" | grep -iEq "$2" +} + +fit_img_16_9() { + convert -resize "$video_resolution"\> -size "$video_resolution" "$1" \ + xc:"$bgcolor" +swap -gravity center -composite "$2" +} + +video_from_img() { + ffmpeg -y \ + -f lavfi \ + -i anullsrc=r=48000 \ + -i "$1" \ + -t "${image_display_time}" \ + $ffmpeg_codec \ + "$2" < /dev/null +} + +mkdir -p "$out_dir" + +# generate video from each image +# TODO: deal with .gif +while read -r tag url; do + if ! regeximatch "$url" '\.(jpg|jpeg|png)$'; then + continue + fi + + imgfile="${out_dir}/${url##*/}" + out="${imgfile%.*}.${video_ext}" + + if [ ! -f "$out" ]; then + + if [ ! -f "$imgfile" ]; then + if ! hurl "$url" > "$imgfile"; then + die "hurl could not download $url" + fi + fi + + if ! regeximatch "$(file -ib "$imgfile")" "^image\/"; then + die "input image $imgfile is invalid ($(file -b "$imgfile"))" + fi + fit_img_16_9 "$imgfile" "${out%.*}_16-9.jpg" + video_from_img "${out%.${video_ext}}_16-9.jpg" "${out}" + printf '%s\n' "$out" + fi +done