diff --git a/Makefile b/Makefile
index 5a40ffd..9084a34 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,7 @@ install: ctpv ctpvclear
 	install $^ $(BINPREFIX)
 
 uninstall:
-	$(RM) $(BINPREFIX)/ctpv
+	$(RM) $(BINPREFIX)/ctpv $(BINPREFIX)/ctpvclear
 
 clean:
 	$(RM) ctpv $(OBJ) $(DEP) $(GEN)
diff --git a/clear.sh b/clear.sh
index a788662..e624585 100644
--- a/clear.sh
+++ b/clear.sh
@@ -1,7 +1,3 @@
-fifo="$(get_fifo "$id")"
+setup_fifo "" 1
 
-[ -e "$fifo" ] || exit 1
-
-fifo_open "$fifo" && {
-	printf '{"action": "remove", "identifier": "preview"}\n' > "$fifo"
-}
+printf '{"action": "remove", "identifier": "preview"}\n' > "$fifo"
diff --git a/ctpv.c b/ctpv.c
index cca262a..03a977b 100644
--- a/ctpv.c
+++ b/ctpv.c
@@ -4,6 +4,7 @@
 #include <string.h>
 #include <signal.h>
 #include <unistd.h>
+#include <sys/stat.h>
 
 #include "error.h"
 #include "server.h"
@@ -24,6 +25,7 @@ static struct {
         MODE_END,
         MODE_LIST,
         MODE_MIME,
+        MODE_NEWER,
     } mode;
     char *server_id_s;
 } ctpv = { .mode = MODE_PREVIEW };
@@ -181,18 +183,43 @@ static int mime(int argc, char *argv[])
         if (argc > 1)
             printf("%s: ", f);
 
+        printf(".%s ", get_ext(f));
         puts(mimetype);
     }
 
     return OK;
 }
 
+static int newer(int argc, char *argv[])
+{
+    char *f1, *f2;
+    GET_PARG(f1, 0);
+    GET_PARG(f2, 1);
+
+    if (!f1 || !f2) {
+        print_error("2 file should be given");
+        return ERR;
+    }
+
+    struct stat stat1, stat2;
+    ERRCHK_RET(stat(f1, &stat1) == -1, FUNCFAILED("stat"), ERRNOS);
+    ERRCHK_RET(stat(f2, &stat2) == -1, FUNCFAILED("stat"), ERRNOS);
+
+    int sec_d = stat1.st_mtim.tv_sec - stat2.st_mtim.tv_sec;
+    if (sec_d < 0)
+        return ERR;
+    else if (sec_d == 0 && stat1.st_mtim.tv_nsec <= stat2.st_mtim.tv_nsec)
+        return ERR;
+
+    return OK;
+}
+
 int main(int argc, char *argv[])
 {
     program = argc > 0 ? argv[0] : "ctpv";
 
     int c;
-    while ((c = getopt(argc, argv, "s:ce:lm")) != -1) {
+    while ((c = getopt(argc, argv, "s:ce:lmn")) != -1) {
         switch (c) {
         case 's':
             ctpv.mode = MODE_SERVER;
@@ -211,6 +238,9 @@ int main(int argc, char *argv[])
         case 'm':
             ctpv.mode = MODE_MIME;
             break;
+        case 'n':
+            ctpv.mode = MODE_NEWER;
+            break;
         default:
             return EXIT_FAILURE;
         }
@@ -239,6 +269,9 @@ int main(int argc, char *argv[])
         case MODE_MIME:
             ret = mime(argc, argv);
             break;
+        case MODE_NEWER:
+            ret = newer(argc, argv);
+            break;
         default:
             PRINTINTERR("unknowm mode: %d", ctpv.mode);
             ret = ERR;
diff --git a/end.sh b/end.sh
index 32135ba..38cb31f 100644
--- a/end.sh
+++ b/end.sh
@@ -1,6 +1,4 @@
-fifo="$(get_fifo "$1")"
+setup_fifo "$1" 1
 
-[ -e "$fifo" ] || exit 1
-
-# sending zero byte tells listener to stop
-fifo_open "$fifo" && printf '\0' > "$fifo"
+# tell ctpv server to exit
+printf '\0' > "$fifo"
diff --git a/helpers.sh b/helpers.sh
index 40bb00a..5d6c0ef 100644
--- a/helpers.sh
+++ b/helpers.sh
@@ -1,13 +1,40 @@
-get_fifo() {
-	printf '/tmp/ctpvfifo.%s' "$1"
+fifo_open() {
+	# https://unix.stackexchange.com/a/522940/183147
+	dd oflag=nonblock conv=notrunc,nocreat count=0 of="$1" \
+		>/dev/null 2>/dev/null
+}
+
+setup_fifo() {
+	exit_code="${2:-127}"
+	fifo="$(printf '/tmp/ctpvfifo.%s' "${1:-$id}")"
+	[ -e "$fifo" ] || exit "$exit_code"
+	fifo_open "$fifo" || exit "$exit_code"
 }
 
 exists() {
 	command -v "$1" > /dev/null
 }
 
-fifo_open() {
-	# https://unix.stackexchange.com/a/522940/183147
-	dd oflag=nonblock conv=notrunc,nocreat count=0 of="$1" \
-		>/dev/null 2>/dev/null
+check_exist() {
+	[ $? = 127 ] && exit 127
+}
+
+cache() {
+	cache_d="${XDG_CACHE_HOME:-$HOME/.cache}/ctpv"
+	mkdir -p "$cache_d"
+	cache_f="$cache_d/$(printf '%s' "$f" | md5sum - | cut -d' ' -f1)"
+	test -e "$cache_f" || return
+	ctpv -n "$cache_f" "$f"
+}
+
+show_image() {
+	path="$(printf '%s' "$1" | sed 's/\\/\\\\/g; s/"/\\"/g')"
+	printf '{ "action": "add", "identifier": "preview", "x": %d, "y": %d, "width": %d, "height": %d, "scaler": "contain", "scaling_position_x": 0.5, "scaling_position_y": 0.5, "path": "%s"}\n' "$x" "$y" "$w" "$h" "$path" > "$fifo"
+}
+
+convert_and_show_image() {
+	setup_fifo
+	cache || "$@" || check_exist
+	show_image "$cache_f"
+	exit 1
 }
diff --git a/prev/image.sh b/prev/image.sh
index 973a153..4f6a844 100644
--- a/prev/image.sh
+++ b/prev/image.sh
@@ -1,13 +1,6 @@
-fifo="$(get_fifo "$id")"
+# exit 127 on error so ctpv fallbacks to another preview
+setup_fifo
 
-# tell ctpv to fallback to another preview
-[ -e "$fifo" ] || exit 127
+show_image "$f"
 
-path="$(printf '%s' "$f" | sed 's/\\/\\\\/g; s/"/\\"/g')"
-
-fifo_open "$fifo" && {
-	printf '{ "action": "add", "identifier": "preview", "x": %d, "y": %d, "width": %d, "height": %d, "scaler": "contain", "scaling_position_x": 1, "scaling_position_y": 1, "path": "%s"}\n' "$x" "$y" "$w" "$h" "$path" > "$fifo"
-}
-
-# tell lf to disable preview caching
 exit 1
diff --git a/prev/pdf.sh b/prev/pdf.sh
new file mode 100644
index 0000000..3e9b146
--- /dev/null
+++ b/prev/pdf.sh
@@ -0,0 +1,10 @@
+pdf() {
+    pdftoppm -f 1 -l 1                   \
+             -scale-to-x 1920            \
+             -scale-to-y -1              \
+             -singlefile                 \
+             -jpeg -tiffcompression jpeg \
+             -- "$f" "$cache_f" && mv -- "$cache_f.jpg" "$cache_f"
+}
+
+convert_and_show_image pdf
diff --git a/prev/video.sh b/prev/video.sh
new file mode 100644
index 0000000..f042005
--- /dev/null
+++ b/prev/video.sh
@@ -0,0 +1,5 @@
+video() {
+	ffmpegthumbnailer -i "$f" -o "$cache_f" -s 0 -t 50% 2>/dev/null
+}
+
+convert_and_show_image video
diff --git a/previews.h b/previews.h
index e358449..ca03adb 100644
--- a/previews.h
+++ b/previews.h
@@ -18,4 +18,6 @@ Preview previews[] = {
     PR("md",      NULL,             NULL,             markdown),
     PR(NULL,      "application",    "json",           json),
     PR(NULL,      "image",          NULL,             image),
+    PR(NULL,      "video",          NULL,             video),
+    PR(NULL,      "application",    "pdf",            pdf),
 };