mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 15:22:09 +00:00
150 lines
3.8 KiB
Bash
Executable File
150 lines
3.8 KiB
Bash
Executable File
#!/bin/sh
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# file identification script
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#
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# manual usage:
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# mpv_identify.sh foo.mkv
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#
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# sh/dash/ksh/bash usage:
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# . mpv_identify.sh FOO_ foo.mkv
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# will fill properties into variables like FOO_length
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#
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# zsh usage:
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# mpv_identify() { emulate -L sh; . mpv_identify.sh "$@"; }
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# mpv_identify FOO_ foo.mkv
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# will fill properties into variables like FOO_length
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#
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# When multiple files were specified, their info will be put into FOO_* for the
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# first file, FOO_1_* for the second file, FOO_2_* for the third file, etc.
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__midentify__main() {
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case "$0" in
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mpv_identify.sh|*/mpv_identify.sh)
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# we are NOT being sourced
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[ -n "$1" ] && set -- '' "$@"
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;;
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esac
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if [ "$#" -lt 2 ]; then
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cat >&2 <<EOF
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Usage 1 (for humans only): $0 filename.mkv
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will print all property values.
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Note that this output really shouldn't be parsed, as the
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format is subject to change.
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Usage 2 (for use by scripts): see top of this file
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NOTE: for mkv with ordered chapters, this may
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not always identify the specified file, but the
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file providing the first chapter. Specify
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--no-ordered-chapters to prevent this.
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EOF
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return 2
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fi
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local LF="
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"
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local nextprefix="$1"
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shift
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if [ -n "$nextprefix" ]; then
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# in case of error, we always want this unset
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unset "${nextprefix}path"
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fi
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local allprops="
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filename
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path
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stream-start
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stream-end
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stream-length
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demuxer
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length
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chapters
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editions
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titles
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duration
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audio
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audio-bitrate
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audio-codec
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audio-codec-name
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video
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angle
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video-bitrate
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video-codec
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video-format
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video-aspect
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container-fps
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width
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height
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dwidth
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dheight
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sub
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"
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# TODO add metadata support once mpv can do it
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local propstr="X-MIDENTIFY-START:$LF"
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local key
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for key in $allprops; do
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propstr="${propstr}X-MIDENTIFY: $key \${=$key}$LF"
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key="$(printf '%s\n' "$key" | tr - _)"
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unset "$nextprefix$key"
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done
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local fileindex=0
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local prefix=
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local line
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while IFS= read -r line; do
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case "$line" in
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X-MIDENTIFY-START:)
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if [ -n "$nextprefix" ]; then
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prefix="$nextprefix"
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if [ "$fileindex" -gt 0 ]; then
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nextprefix="${prefix%${fileindex}_}"
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fi
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fileindex="$((fileindex+1))"
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nextprefix="${nextprefix}${fileindex}_"
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for key in $allprops; do
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key="$(printf '%s\n' "$key" | tr - _)"
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unset "$nextprefix$key"
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done
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else
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if [ "$fileindex" -gt 0 ]; then
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printf '\n'
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fi
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fileindex="$((fileindex+1))"
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fi
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;;
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X-MIDENTIFY:\ *)
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local key="${line#X-MIDENTIFY: }"
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local value="${key#* }"
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key="${key%% *}"
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key="$(printf '%s\n' "$key" | tr - _)"
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if [ -n "$nextprefix" ]; then
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if [ -z "$prefix" ]; then
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echo >&2 "Got X-MIDENTIFY: without X-MIDENTIFY-START:"
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elif [ -n "$value" ]; then
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eval "$prefix$key"='"$value"'
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fi
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else
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if [ -n "$value" ]; then
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printf '%s=%s\n' "$key" "$value"
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fi
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fi
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;;
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esac
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done <<EOF
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$(${MPV:-mpv} --term-playing-msg="$propstr" --vo=null --ao=null \
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--frames=1 --quiet --no-cache --no-config -- "$@")
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EOF
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}
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__midentify__main "$@"
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