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idet.sh: An alternative to ildetect.sh.

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This script uses ffmpeg's "idet" filter for interlace detection. In the
long run this should replace ildetect.sh+ildetect.sh.
This commit is contained in:
Rudolf Polzer
2014-05-26 14:28:18 +02:00
parent 799b5e1a5d
commit c0cd58e3f5
1 changed files with 161 additions and 0 deletions
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161
TOOLS/idet.sh Executable file
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@@ -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