mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 15:52:25 +00:00
159 lines
4.6 KiB
Bash
Executable File
159 lines
4.6 KiB
Bash
Executable File
#!/bin/sh
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: "${MPV:=mpv}"
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: "${ILDETECT_MPV:=$MPV}"
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: "${ILDETECT_MPVFLAGS:=--start=35% --length=35}"
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: "${ILDETECT_DRY_RUN:=}"
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: "${ILDETECT_QUIET:=}"
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: "${ILDETECT_RUN_INTERLACED_ONLY:=}"
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: "${ILDETECT_FORCE_RUN:=}"
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# This script uses ffmpeg's "idet" filter for interlace detection. In the
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# long run this should replace ildetect.sh+ildetect.so.
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# exit status:
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# 0 progressive
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# 1 telecine
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# 2 interlaced
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# 8 unknown
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# 16 detect fail
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# 17+ mpv's status | 16
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testfun()
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{
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$ILDETECT_MPV "$@" \
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--vf-add=lavfi="[idet]" --msg-level ffmpeg=v \
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--o= --vo=null --no-audio --untimed \
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$ILDETECT_MPVFLAGS \
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| { if [ -n "$ILDETECT_QUIET" ]; then cat; else tee /dev/stderr; fi } \
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| grep "Parsed_idet_0: Multi frame detection: "
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}
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judge()
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{
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tff=0
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bff=0
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progressive=0
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undetermined=0
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while read -r _ _ _ _ _ _ tff1 _ bff1 _ progressive1 _ undetermined1 _; do
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case "$tff1$bff1$progressive1$undetermined1" in
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*[!0-9]*)
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printf >&2 'ERROR: Unrecognized idet output: %s\n' "$out"
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exit 16
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;;
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esac
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tff=$((tff + tff1))
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bff=$((bff + bff1))
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progressive=$((progressive + progressive1))
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undetermined=$((undetermined + undetermined1))
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done <<EOF
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$(testfun "$@" | sed 's/:/: /g')
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EOF
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interlaced=$((bff + tff))
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determined=$((interlaced + progressive))
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if [ "$undetermined" -gt "$determined" ] || [ "$determined" -lt 250 ]; then
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echo >&2 "ERROR: Less than 50% or 250 frames are determined."
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[ -n "$ILDETECT_FORCE_RUN" ] || exit 8
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echo >&2 "Assuming interlacing."
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if [ "$tff" -gt $((bff * 10)) ]; then
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verdict="interlaced-tff"
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elif [ "$bff" -gt $((tff * 10)) ]; then
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verdict="interlaced-bff"
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else
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verdict="interlaced"
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fi
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elif [ $((interlaced * 20)) -gt "$progressive" ]; then
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# At least 5% of the frames are interlaced!
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if [ "$tff" -gt $((bff * 10)) ]; then
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verdict="interlaced-tff"
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elif [ "$bff" -gt $((tff * 10)) ]; then
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verdict="interlaced-bff"
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else
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echo >&2 "ERROR: Content is interlaced, but can't determine field order."
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[ -n "$ILDETECT_FORCE_RUN" ] || exit 8
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echo >&2 "Assuming interlacing with default field order."
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verdict="interlaced"
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fi
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else
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# Likely progressive
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verdict="progressive"
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fi
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printf '%s\n' "$verdict"
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}
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judge "$@" --vf-clr
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case "$verdict" in
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progressive)
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[ -n "$ILDETECT_DRY_RUN" ] || \
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[ -n "$ILDETECT_RUN_INTERLACED_ONLY" ] || \
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$ILDETECT_MPV "$@"
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r=$?
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[ $r -eq 0 ] || exit $((r | 16))
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exit 0
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;;
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interlaced-tff)
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judge "$@" --vf-clr --vf-pre=lavfi=\[setfield=tff\],pullup
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case "$verdict" in
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progressive)
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[ -n "$ILDETECT_DRY_RUN" ] || \
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$ILDETECT_MPV "$@" --vf-pre=lavfi=\[setfield=tff\],pullup
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r=$?
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[ $r -eq 0 ] || exit $((r | 16))
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exit 1
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;;
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*)
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[ -n "$ILDETECT_DRY_RUN" ] || \
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$ILDETECT_MPV "$@" --vf-pre=lavfi=\[setfield=tff\],yadif
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r=$?
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[ $r -eq 0 ] || exit $((r | 16))
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exit 2
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;;
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esac
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;;
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interlaced-bff)
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judge "$@" --vf-clr --vf-pre=lavfi=\[setfield=bff\],pullup
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case "$verdict" in
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progressive)
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[ -n "$ILDETECT_DRY_RUN" ] || \
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$ILDETECT_MPV "$@" --vf-pre=lavfi=\[setfield=bff\],pullup
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r=$?
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[ $r -eq 0 ] || exit $((r | 16))
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exit 1
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;;
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*)
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[ -n "$ILDETECT_DRY_RUN" ] || \
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$ILDETECT_MPV "$@" --vf-pre=lavfi=\[setfield=bff\],yadif
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r=$?
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[ $r -eq 0 ] || exit $((r | 16))
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exit 2
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;;
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esac
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;;
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interlaced)
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judge "$@" --vf-clr --vf-pre=pullup
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case "$verdict" in
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progressive)
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[ -n "$ILDETECT_DRY_RUN" ] || \
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$ILDETECT_MPV "$@" --vf-pre=pullup
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r=$?
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[ $r -eq 0 ] || exit $((r | 16))
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exit 1
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;;
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*)
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[ -n "$ILDETECT_DRY_RUN" ] || \
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$ILDETECT_MPV "$@" --vf-pre=yadif
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r=$?
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[ $r -eq 0 ] || exit $((r | 16))
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exit 2
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;;
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esac
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;;
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*)
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echo >&2 "ERROR: Internal error."
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exit 16
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;;
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esac
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