Fix multiple content metadata bug (but without compilation error this time)

third-party/libscan/CMakeLists.txt

@@ -11,11 +11,6 @@ if (SIST_DEBUG)
             antiword
             DEBUG
     )
-else()
-    add_compile_definitions(
-            antiword
-            NDEBUG
-    )
     target_compile_options(
             antiword
             PRIVATE
@@ -25,6 +20,11 @@ else()
             -fsanitize=address
             -fno-inline
     )
+else()
+    add_compile_definitions(
+            antiword
+            NDEBUG
+    )
 endif()
 
 add_library(

third-party/libscan/libscan/media/media.c

@@ -251,7 +251,7 @@ void append_tag_meta_if_not_exists(scan_media_ctx_t *ctx, document_t *doc, AVDic
     for (; *ptr; ++ptr) *ptr = (char) tolower(*ptr);
 
 __always_inline
-static void append_audio_meta(AVFormatContext *pFormatCtx, document_t *doc) {
+static void append_audio_meta(scan_media_ctx_t *ctx, AVFormatContext *pFormatCtx, document_t *doc) {
 
     AVDictionaryEntry *tag = NULL;
     while ((tag = av_dict_get(pFormatCtx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
@@ -269,7 +269,7 @@ static void append_audio_meta(AVFormatContext *pFormatCtx, document_t *doc) {
         } else if (strcmp(key, "album") == 0) {
             APPEND_TAG_META(MetaAlbum)
         } else if (strcmp(key, "comment") == 0) {
-            APPEND_TAG_META(MetaContent)
+            append_tag_meta_if_not_exists(ctx, doc, tag, MetaContent);
         }
     }
 }
@@ -437,7 +437,7 @@ int decode_frame_and_save_thumbnail(scan_media_ctx_t *ctx, AVFormatContext *pFor
         return SAVE_THUMBNAIL_FAILED;
     }
 
-    if (ctx->tesseract_lang != NULL && IS_VIDEO(pFormatCtx)) {
+    if (ctx->tesseract_lang != NULL && IS_VIDEO(pFormatCtx) && thumbnail_index == 0) {
         ocr_image(ctx, doc, decoder, frame_and_packet->frame);
     }
 
@@ -558,7 +558,7 @@ void parse_media_format_ctx(scan_media_ctx_t *ctx, AVFormatContext *pFormatCtx,
     }
 
     if (audio_stream != -1) {
-        append_audio_meta(pFormatCtx, doc);
+        append_audio_meta(ctx, pFormatCtx, doc);
     }
 
     if (video_stream != -1 && ctx->tn_count > 0) {