fix: add labels to mkv downloads and make multiple subs work

lobster.sh

@@ -575,22 +575,32 @@ EOF
         fi
         exit 0
     }
-    # download_video [url] [title] [download_dir] [thumbnail_file]
+    # download_video [url] [title] [download_dir] [json_data] [thumbnail_file (only when image_preview is enabled)]
     download_video() {
         title="$(printf "%s" "$2" | tr -d ':/')"
         dir="${3}/${title}"
-        num_subs="$(echo "$subs_links" | sed 's/:\([^\/]\)/\n\\1/g' | wc -l)"
-        ffmpeg_subs_links=$(printf "%s" "$subs_links" | sed -E 's/https(\\)?:/-i https:/g; s/:\([^\/]\)/ \\1/g')
+        # ik this is dumb idc
+        language=$(printf "%s" "$4" | sed -nE "s@.*\"file\":\"[^\"]*\".*\"label\":\"(.$subs_language)[,\"\ ].*@\1@p")
+        num_subs="$(printf "%s" "$subs_links" | sed 's/:\([^\/]\)/\n\\1/g' | wc -l)"
+        ffmpeg_subs_links=$(printf "%s" "$subs_links" | sed 's/:\([^\/]\)/\nh/g; s/\\:/:/g' | while read -r sub_link; do
+            printf " -i %s" "$sub_link"
+        done)
         sub_ops="$ffmpeg_subs_links -map 0:v -map 0:a"
-        i=0
-        while [ "$i" -lt "$num_subs" ]; do
-            ffmpeg_maps="$ffmpeg_maps -map $((i + 1))"
-            # FIXME: use filename for language
-            ffmpeg_meta="$ffmpeg_meta -metadata:s:s:$i language=unknown"
-            i=$((i + 1))
-        done
+        if [ "$num_subs" -eq 0 ]; then
+            sub_ops=" -i $subs_links -map 0:v -map 0:a -map 1"
+            ffmpeg_meta="-metadata:s:s:0 language=$language"
+        else
+            i=1
+            for i in $(seq 1 "$num_subs"); do
+                ffmpeg_maps="$ffmpeg_maps -map $i"
+                ffmpeg_meta="$ffmpeg_meta -metadata:s:s:$((i - 1)) language=$(printf "%s_%s" "$language" "$i")"
+                i=$((i + 1))
+            done
+        fi
+
         sub_ops="$sub_ops $ffmpeg_maps -c:v copy -c:a copy -c:s srt $ffmpeg_meta"
-        eval "ffmpeg -loglevel error -stats -i '$1' $sub_ops -c copy '$dir.mkv'"
+        # shellcheck disable=SC2086
+        ffmpeg -loglevel error -stats -i "$1" $sub_ops -c copy -threads 6 "$dir.mkv"
     }
     choose_from_trending_or_recent() {
         path=$1
@@ -615,18 +625,18 @@ EOF
             if [ "$download" = "1" ]; then
                 if [ "$media_type" = "movie" ]; then
                     if [ "$image_preview" = "true" ]; then
-                        download_video "$video_link" "$title" "$download_dir" "$images_cache_dir/  $title ($media_type)  $media_id.jpg" || exit 1
+                        download_video "$video_link" "$title" "$download_dir" "$json_data" "$images_cache_dir/  $title ($media_type)  $media_id.jpg" &
                         send_notification "Finished downloading" "5000" "$images_cache_dir/  $title ($media_type)  $media_id.jpg" "$title"
                     else
-                        download_video "$video_link" "$title" "$download_dir" || exit 1
+                        download_video "$video_link" "$title" "$download_dir" "$json_data" &
                         send_notification "Finished downloading" "5000" "" "$title"
                     fi
                 else
                     if [ "$image_preview" = "true" ]; then
-                        download_video "$video_link" "$title - $season_title - $episode_title" "$download_dir" "$images_cache_dir/  $title ($media_type)  $media_id.jpg" || exit 1
+                        download_video "$video_link" "$title - $season_title - $episode_title" "$download_dir" "$json_data" "$images_cache_dir/  $title ($media_type)  $media_id.jpg" &
                         send_notification "Finished downloading" "5000" "$images_cache_dir/  $title - $season_title - $episode_title ($media_type)  $media_id.jpg" "$title - $season_title - $episode_title"
                     else
-                        download_video "$video_link" "$title - $season_title - $episode_title" "$download_dir" || exit 1
+                        download_video "$video_link" "$title - $season_title - $episode_title" "$download_dir" "$json_data" &
                         send_notification "Finished downloading" "5000" "" "$title - $season_title - $episode_title"
                     fi
                 fi