vf_dlopen filters: add an "ildetect" filter that detects interlacing

The filter analyzes each frame for combing, and decides at the end
whether the content is likely interlaced, telecined or progressive.

1 files changed, 43 insertions, 0 deletions

diff --git a/TOOLS/vf_dlopen/ildetect.sh b/TOOLS/vf_dlopen/ildetect.sh
new file mode 100755
index 0000000000..e9027077d2
--- /dev/null
+++ b/TOOLS/vf_dlopen/ildetect.sh
@@ -0,0 +1,43 @@
+#!/bin/sh
+
+case "$0" in
+    */*)
+        MYDIR=${0%/*}
+        ;;
+    *)
+        MYDIR=.
+        ;;
+esac
+
+set -e
+
+make -C "$MYDIR"
+
+testfun()
+{
+    ${MPV:-mpv} "$@" \
+        -vf dlopen="$MYDIR/ildetect.so" \
+        -o /dev/null -of nut -ovc rawvideo -no-audio \
+        | grep "^ildetect:"
+}
+
+out=`testfun "$@"`
+echo
+echo
+echo "$out"
+echo
+echo
+case "$out" in
+    *"probably: PROGRESSIVE"*)
+        ${MPV:-mpv} "$@"
+        ;;
+    *"probably: INTERLACED"*)
+        ${MPV:-mpv} "$@" -vf-pre yadif
+        ;;
+    *"probably: TELECINED"*)
+        ${MPV:-mpv} "$@" -vf-pre pullup
+        ;;
+    *)
+        false
+        ;;
+esac