Subtitle support for plexoptimize.

plexoptimize.sh

@@ -1,2 +1,13 @@
-#!/bin/sh
-ffmpeg -i "$1" -c:v h264 -c:a libvo_aacenc -preset fast -movflags +faststart -crf 18 -b:a 192k -ac 2 "$1.mp4"
+#!/bin/bash
+if [ -z "$1" ]; then
+    echo "Syntax: $0 VIDEOFILE [SUBTITLEFILE]"
+    exit 1
+fi
+SUBPARAMS=( )
+if [ -n "$2" ]; then
+    # http://stackoverflow.com/questions/8672809/use-ffmpeg-to-add-text-subtitles
+    SUBPARAMS=( -f srt -i "$2" -map 0:0 -map 0:1 -map 1:0 -c:s mov_text )    # mp4
+#    SUBPARAMS=( -f srt -i "$2" -map 0:0 -map 0:1 -map 1:0 -c:s srt )    # mkv
+fi
+# For source mpeg4: -bsf:v mpeg4_unpack_bframes
+ffmpeg -i "$1" "${SUBPARAMS[@]}" -c:v h264 -c:a libvo_aacenc -preset fast -movflags +faststart -crf 18 -b:a 192k -ac 2 "$1.mp4"