GopherProxy

	tbrtv-imgs-to-video.sh - bitreich-tv - meme tv encoding and streaming
	git clone git://src.adamsgaard.dk/bitreich-tv
	Log
	Files
	Refs
	---
	tbrtv-imgs-to-video.sh (1630B)
	---
	1 #!/bin/sh
	2 # read hashtags.txt as stdin, download all images, and convert them to v…
	3 # requirements: hurl(1), ffmpeg(1), convert(1)
	4
	5
	6 ### CONFIGURATION START
	7
	8 # dir to contain images as videos
	9 out_dir="img2vid"
	10
	11 # ffmpeg flags for generated videos
	12 video_ext="webm"
	13 ffmpeg_codec="-loglevel error -acodec libopus -b:a 96K -vcodec libvpx -b…
	14
	15 # target video resolution
	16 video_resolution=1280x720
	17
	18 # slide style
	19 bgcolor=magenta
	20
	21 # show image memes for this duration [s]
	22 image_display_time=10
	23
	24 ### CONFIGURATION END
	25
	26
	27 die() {
	28 printf '%s: error: %s\n' "${0##*/}" "$1" >&2
	29 exit 1
	30 }
	31
	32 regeximatch() {
	33 printf '%s' "$1" \| grep -iEq "$2"
	34 }
	35
	36 fit_img_16_9() {
	37 convert -resize "$video_resolution"\> -size "$video_resolution" …
	38 xc:"$bgcolor" +swap -gravity center -composite "$2"
	39 }
	40
	41 video_from_img() {
	42 ffmpeg -y \
	43 -f lavfi \
	44 -i anullsrc=r=48000 \
	45 -i "$1" \
	46 -t "${image_display_time}" \
	47 $ffmpeg_codec \
	48 "$2" < /dev/null
	49 }
	50
	51 mkdir -p "$out_dir"
	52
	53 # generate video from each image
	54 # TODO: deal with .gif
	55 while read -r tag url; do
	56 if ! regeximatch "$url" '\.(jpg\|jpeg\|png)$'; then
	57 continue
	58 fi
	59
	60 imgfile="${out_dir}/${url##*/}"
	61 out="${imgfile%.*}.${video_ext}"
	62
	63 if [ ! -f "$out" ]; then
	64
	65 if [ ! -f "$imgfile" ]; then
	66 if ! hurl "$url" > "$imgfile"; then
	67 die "hurl could not download $url"
	68 fi
	69 fi
	70
	71 if ! regeximatch "$(file -ib "$imgfile")" "^image\/"; th…
	72 die "input image $imgfile is invalid ($(file -b …
	73 fi
	74 fit_img_16_9 "$imgfile" "${out%.*}_16-9.jpg"
	75 video_from_img "${out%.${video_ext}}_16-9.jpg" "${out}"
	76 printf '%s\n' "$out"
	77 fi
	78 done