[mythtv-users] mythvideo thumbnails

[Neil]

i've taken this scripts written by segaera and consolidated everything into one script.  also, this script will run the query to get the videos to update only once, whereas segaera's is running once for each video.  furthermore, this script takes the length of the video into account when skipping ahead for the screenshot position.  a percentage is used instead of a fixed value to get a good capture in videos of widely varying lengths.  here it is:#!/bin/sh# this script will loop through all videos in videometadata,# capture a screenshot for each, move each screenshot to the# COVERPATH dir, and update each row in videometadata with# the appropriate information.  Only rows with coverfile=# 'No Cover' are processed.  A percentage of the length# of each video is used for the capture position to account# for clips of widely varying lengths.# only run as mythtv so writing to /myth is allowedif [ $(whoami) != 'mythtv' ]; then        echo "This script must run under user mythtv."        exit 1fi# intialize variablesDB='mythconverg'USER='root'OUTPATH='/tmp'COVERPATH='/myth/video/.covers'FRAME='00000002.jpg'SKIPOFFSET='35'# query videos with no cover imageVIDEOS="mysql $DB -u $USER \        -e \"SELECT intid,filename FROM videometadata \        WHERE coverfile='No Cover';\" -BN" sh -c "$VIDEOS"|while read line#echo "$FILE"|while read linedo        ID=`echo "$line" |cut -f 1`        FILE=`echo "$line" |cut -f 2`        echo "processing $FILE with primary key id $ID"        # if video is mpeg, use ffmpeg12 codec to avoid pixelation        if echo "$FILE" | egrep ".*\.mp[e]*g" ; then                VC='-vc ffmpeg12'        else                VC=''        fi        # use mplayer to get length of video in seconds        length=`mplayer -vo null -nosound -identify \                -vc dummy "$FILE" | \                egrep "^(ID_LENGTH=)" | cut -d '=' -f 2`         if [ -z $length ]; then                echo "mplayer was unable to get the $FILE length."                continue        fi        SKIP=`echo $length*$SKIPOFFSET/100|bc -l`        echo "calcuated skip seconds: $SKIP"        # command to get jpeg from video        mplayer -noframedrop -ss $SKIP -vo \                jpeg:quality=50:outdir=$OUTPATH -frames 2 $VC -nosound "$FILE" &        wait        echo mv $OUTPATH/$FRAME $COVERPATH/intid.$ID.jpg         # move jpeg from outpath to coverpath        if ! mv -f "$OUTPATH/$FRAME" "$COVERPATH/intid.$ID.jpg" ; then                echo "Move failed. Will not update videometadata table..."                rm -f "$OUTPATH/$FRAME"        else                # SQL to update table with cover image path                UPDATE=`mysql $DB -u $USER \                        -e "UPDATE videometadata SET coverfile='$COVERPATH/intid.$ID.jpg' \                        WHERE intid=$ID LIMIT 1 ;" -BN`        fidone  exit 0
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