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|
#!/bin/sh
# file identification script
#
# manual usage:
# mpv_identify.sh foo.mkv
#
# sh/dash/ksh/bash usage:
# . mpv_identify.sh FOO_ foo.mkv
# will fill properties into variables like FOO_length
#
# zsh usage:
# mpv_identify() { emulate -L sh; . mpv_identify.sh "$@"; }
# mpv_identify FOO_ foo.mkv
# will fill properties into variables like FOO_length
#
# When multiple files were specified, their info will be put into FOO_* for the
# first file, FOO_1_* for the second file, FOO_2_* for the third file, etc.
case "$0" in
mpv_identify.sh|*/mpv_identify.sh)
# we are NOT being sourced
case "$1" in
'')
;;
*)
set -- '' "$@"
;;
esac
;;
esac
if [ $# -lt 2 ]; then
echo >&2 "Usage 1 (for humans only): $0 filename.mkv"
echo >&2 "will print all property values."
echo >&2 "Note that this output really shouldn't be parsed, as the"
echo >&2 "format is subject to change."
echo >&2
echo >&2 "Usage 2 (for use by scripts): see top of this file"
echo >&2
echo >&2 "NOTE: for mkv with ordered chapters, this may"
echo >&2 "not always identify the specified file, but the"
echo >&2 "file providing the first chapter. Specify"
echo >&2 "--no-ordered-chapters to prevent this."
exit 1
fi
if [ -z "$MPV" ]; then
MPV="mpv"
fi
__midentify__LF="
"
__midentify__nextprefix=$1
shift
if [ -n "$__midentify__nextprefix" ]; then
# in case of error, we always want this unset
eval unset $__midentify__nextprefix'path'
fi
__midentify__allprops="
filename
path
stream-start
stream-end
stream-length
demuxer
length
chapters
editions
titles
audio
audio-bitrate
audio-codec
audio-format
channels
samplerate
video
angle
video-bitrate
video-codec
video-format
aspect
fps
width
height
dwidth
dheight
sub
"
# TODO add metadata support once mpv can do it
__midentify__propstr="X-MIDENTIFY-START:$__midentify__LF"
for __midentify__key in $__midentify__allprops; do
__midentify__propstr=$__midentify__propstr"X-MIDENTIFY: $__midentify__key \${=$__midentify__key}$__midentify__LF"
__midentify__key=`echo "$__midentify__key" | tr - _`
eval unset $__midentify__nextprefix$__midentify__key
done
__midentify__output=`$MPV --playing-msg="$__midentify__propstr" --vo=null --ao=null --frames=1 --quiet --no-cache --no-config "$@"`
__midentify__fileindex=0
__midentify__prefix=
while :; do
case "$__midentify__output" in
'')
break
;;
*$__midentify__LF*)
__midentify__line=${__midentify__output%%$__midentify__LF*}
__midentify__output=${__midentify__output#*$__midentify__LF}
;;
*)
__midentify__line=$__midentify__output
__midentify__output=
;;
esac
case "$__midentify__line" in
X-MIDENTIFY-START:)
if [ -n "$__midentify__nextprefix" ]; then
__midentify__prefix=$__midentify__nextprefix
if [ $__midentify__fileindex -gt 0 ]; then
__midentify__nextprefix=${__midentify__prefix%$__midentify__fileindex\_}
fi
__midentify__fileindex=$(($__midentify__fileindex+1))
__midentify__nextprefix=$__midentify__nextprefix$__midentify__fileindex\_
for __midentify__key in $__midentify__allprops; do
__midentify__key=`echo "$__midentify__key" | tr - _`
eval unset $__midentify__nextprefix$__midentify__key
done
else
if [ $__midentify__fileindex -gt 0 ]; then
echo
fi
__midentify__fileindex=$(($__midentify__fileindex+1))
fi
;;
X-MIDENTIFY:\ *)
__midentify__key=${__midentify__line#X-MIDENTIFY:\ }
__midentify__value=${__midentify__key#* }
__midentify__key=${__midentify__key%% *}
__midentify__key=`echo "$__midentify__key" | tr - _`
if [ -n "$__midentify__nextprefix" ]; then
if [ -z "$__midentify__prefix" ]; then
echo >&2 "Got X-MIDENTIFY: without X-MIDENTIFY-START:"
elif [ -n "$__midentify__value" ]; then
eval $__midentify__prefix$__midentify__key=\$__midentify__value
fi
else
if [ -n "$__midentify__value" ]; then
echo "$__midentify__key=$__midentify__value"
fi
fi
;;
esac
done
unset __midentify__fileindex
unset __midentify__allprops
unset __midentify__key
unset __midentify__LF
unset __midentify__line
unset __midentify__output
unset __midentify__nextprefix
unset __midentify__prefix
unset __midentify__propstr
unset __midentify__value
|
