ffprobe
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ffprobe [2019-10-04 10:22:09] mi [Other options] |
ffprobe [2023-06-08 15:10:59] (current) mi [Show video format] |
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| The normal text output of ''ffprobe'' goes to stderr, so you usually need to add ''2>&1'' to parse the output. The alternative is to use the complex ffprobe options to format the output which then goes to stdout. | The normal text output of ''ffprobe'' goes to stderr, so you usually need to add ''2>&1'' to parse the output. The alternative is to use the complex ffprobe options to format the output which then goes to stdout. | ||
| + | Start with a look at this page: https://trac.ffmpeg.org/wiki/FFprobeTips | ||
| + | |||
| + | ===== Show metadata tags===== | ||
| + | |||
| + | ffprobe -v quiet "$in" -print_format json -show_entries stream_tags:format_tags | ||
| + | |||
| + | (for ''-print_format'', there is also ''flat'', ''xml'', ''csv'', etc.) | ||
| + | |||
| + | ===== Show video format===== | ||
| + | |||
| + | ffprobe -v warning -select_streams v -show_entries stream=codec_name,height,width,pix_fmt -of csv=p=0 "$in" | ||
| + | |||
| + | ===== Has alpha channel? ===== | ||
| + | |||
| + | https://stackoverflow.com/questions/69029439/a-good-way-to-detect-alpha-channel-in-a-video-using-ffmpeg-ffprobe | ||
| + | |||
| + | <code bash>for f in *.mov; do | ||
| + | pixfmt=$(ffprobe -v 0 -select_streams v:0 -show_entries stream=pix_fmt -of compact=p=0:nk=1 "$f") | ||
| + | alpha=$(ffprobe -v 0 -show_entries pixel_format=name:flags=alpha -of compact=p=0 | grep "$pixfmt|" | grep -oP "(?<=alpha=)\d") | ||
| + | if (( alpha )); then echo "$f : yes, has alpha"; else echo "$f : NO"; fi | ||
| + | done | ||
| + | </code> | ||
| ===== List audio tracks ===== | ===== List audio tracks ===== | ||
| - | ffprobe "$in" 2>&1 | perl -nle '/^\s+Stream #(\d+:\d+): Audio/ && print $1' | + | ffprobe "$in" 2>&1 | perl -nle '/^\s+Stream #(\d+:\d+).*?: Audio/ && print $1' |
| | | ||
| with codec and number of channels: | with codec and number of channels: | ||
| - | ffprobe "$in" 2>&1 | perl -nle '/^\s+Stream #(\d+:\d+): Audio: (\S+).*(\d+)\s+channels/ && print join("\t", $1, $2, $3)' | + | ffprobe "$in" 2>&1 | perl -nle '/^\s+Stream #(\d+:\d+).*?: Audio: (\S+).*(?:(\d+)\s+channels)?/ && print join("\t", $1, $2, $3)' |
| or to have the tracks in a Bash array: | or to have the tracks in a Bash array: | ||
| Line 17: | Line 39: | ||
| or the "official" way: | or the "official" way: | ||
| - | ffprobe -select_streams a -show_entries stream=index -of csv=p=0 "$in" | + | ffprobe -v quiet -select_streams a -show_entries stream=index -of csv=p=0 "$in" |
| | | ||
| - | ffprobe -select_streams a -show_entries stream=index,codec_name,channels -of csv=p=0 "$in" | + | ffprobe -v quiet -select_streams a -show_entries stream=index,codec_name,channels -of csv=p=0 "$in" |
| | | ||
| - | audio_tracks=( $(ffprobe -select_streams a -show_entries stream=index -of csv=p=0 "$in") ) | + | audio_tracks=( $(ffprobe -v quiet -select_streams a -show_entries stream=index -of csv=p=0 "$in") ) |
| + | |||
| + | ===== List subtitles ===== | ||
| + | |||
| + | ffprobe -v quiet -select_streams s -show_entries stream=index,codec_name:stream_tags=language -of csv=p=0 "$in" | ||
| + | |||
| + | (but for mkv, better see [[mkv]]) | ||
| ===== Check Volume ===== | ===== Check Volume ===== | ||
/docs/dokuwiki/data/attic/ffprobe.1570177329.txt.gz · Last modified: 2019-10-04 10:22:09 by mi
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