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-rwxr-xr-xTOOLS/idet.sh161
1 files changed, 161 insertions, 0 deletions
diff --git a/TOOLS/idet.sh b/TOOLS/idet.sh
new file mode 100755
index 0000000000..8e1580cbb8
--- /dev/null
+++ b/TOOLS/idet.sh
@@ -0,0 +1,161 @@
+#!/bin/sh
+
+case "$0" in
+ */*)
+ MYDIR=${0%/*}
+ ;;
+ *)
+ MYDIR=.
+ ;;
+esac
+
+: ${MPV:=mpv}
+: ${ILDETECT_MPV:=$MPV}
+: ${ILDETECT_MPV:=$MPV}
+: ${ILDETECT_MPVFLAGS:=--start=35% --length=35}
+: ${ILDETECT_DRY_RUN:=}
+: ${ILDETECT_QUIET:=}
+: ${ILDETECT_RUN_INTERLACED_ONLY:=}
+: ${ILDETECT_FORCE_RUN:=}
+: ${MAKE:=make}
+
+# exit status:
+# 0 progressive
+# 1 telecine
+# 2 interlaced
+# 8 unknown
+# 16 detect fail
+# 17+ mpv's status | 16
+
+testfun()
+{
+ $ILDETECT_MPV "$@" \
+ --vf=lavfi="[idet]" --msg-level ffmpeg=v \
+ --o= --vo=null --no-audio --untimed \
+ $ILDETECT_MPVFLAGS \
+ | { if [ -n "$ILDETECT_QUIET" ]; then cat; else tee /dev/stderr; fi } \
+ | grep "Parsed_idet_0: Multi frame detection: " | tail -n 1
+}
+
+judge()
+{
+ out=`testfun "$@"`
+
+ tff=${out##* TFF:}; tff=${tff%% *}
+ bff=${out##* BFF:}; bff=${bff%% *}
+ progressive=${out##* Progressive:}; progressive=${progressive%% *}
+ undetermined=${out##* Undetermined:}; undetermined=${undetermined%% *}
+
+ case "$tff$bff$progressive$undetermined" in
+ *[!0-9]*)
+ echo >&2 "ERROR: Unrecognized idet output: $out"
+ exit 16
+ ;;
+ esac
+
+ interlaced=$((bff + tff))
+ determined=$((interlaced + progressive))
+
+ if [ $undetermined -gt $determined ] || [ $determined -lt 250 ]; then
+ echo >&2 "ERROR: Less than 50% or 250 frames are determined."
+ [ -n "$ILDETECT_FORCE_RUN" ] || exit 8
+ echo >&2 "Assuming interlacing."
+ if [ $tff -gt $((bff * 10)) ]; then
+ verdict=interlaced-tff
+ elif [ $bff -gt $((tff * 10)) ]; then
+ verdict=interlaced-bff
+ else
+ verdict=interlaced
+ fi
+ elif [ $((interlaced * 20)) -gt $progressive ]; then
+ # At least 5% of the frames are interlaced!
+ if [ $tff -gt $((bff * 10)) ]; then
+ verdict=interlaced-tff
+ elif [ $bff -gt $((tff * 10)) ]; then
+ verdict=interlaced-bff
+ else
+ echo >&2 "ERROR: Content is interlaced, but can't determine field order."
+ [ -n "$ILDETECT_FORCE_RUN" ] || exit 8
+ echo >&2 "Assuming interlacing with default field order."
+ verdict=interlaced
+ fi
+ else
+ # Likely progrssive.
+ verdict=progressive
+ fi
+
+ echo "$verdict"
+}
+
+judge "$@"
+case "$verdict" in
+ progressive)
+ [ -n "$ILDETECT_DRY_RUN" ] || \
+ [ -n "$ILDETECT_RUN_INTERLACED_ONLY" ] || \
+ $ILDETECT_MPV "$@"
+ r=$?
+ [ $r -eq 0 ] || exit $(($r | 16))
+ exit 0
+ ;;
+ interlaced-tff)
+ judge "$@" --vf-pre=pullup --field-dominance=top
+ case "$verdict" in
+ progressive)
+ [ -n "$ILDETECT_DRY_RUN" ] || \
+ $ILDETECT_MPV "$@" --vf-pre=pullup --field-dominance=top
+ r=$?
+ [ $r -eq 0 ] || exit $(($r | 16))
+ exit 1
+ ;;
+ *)
+ [ -n "$ILDETECT_DRY_RUN" ] || \
+ $ILDETECT_MPV "$@" --vf-pre=yadif --field-dominance=top
+ r=$?
+ [ $r -eq 0 ] || exit $(($r | 16))
+ exit 2
+ ;;
+ esac
+ ;;
+ interlaced-bff)
+ judge "$@" --vf-pre=pullup --field-dominance=bottom
+ case "$verdict" in
+ progressive)
+ [ -n "$ILDETECT_DRY_RUN" ] || \
+ $ILDETECT_MPV "$@" --vf-pre=pullup --field-dominance=bottom
+ r=$?
+ [ $r -eq 0 ] || exit $(($r | 16))
+ exit 1
+ ;;
+ *)
+ [ -n "$ILDETECT_DRY_RUN" ] || \
+ $ILDETECT_MPV "$@" --vf-pre=yadif --field-dominance=bottom
+ r=$?
+ [ $r -eq 0 ] || exit $(($r | 16))
+ exit 2
+ ;;
+ esac
+ ;;
+ interlaced)
+ judge "$@" --vf-pre=pullup
+ case "$verdict" in
+ progressive)
+ [ -n "$ILDETECT_DRY_RUN" ] || \
+ $ILDETECT_MPV "$@" --vf-pre=pullup
+ r=$?
+ [ $r -eq 0 ] || exit $(($r | 16))
+ exit 1
+ ;;
+ *)
+ [ -n "$ILDETECT_DRY_RUN" ] || \
+ $ILDETECT_MPV "$@" --vf-pre=yadif
+ r=$?
+ [ $r -eq 0 ] || exit $(($r | 16))
+ exit 2
+ ;;
+ esac
+ ;;
+ *)
+ echo >&2 "ERROR: Internal error."
+ exit 16
+ ;;
+esac