diff --git a/aegisub/libffms/src/core/audiosource.cpp b/aegisub/libffms/src/core/audiosource.cpp
index 08f1606df..136d5b93b 100644
--- a/aegisub/libffms/src/core/audiosource.cpp
+++ b/aegisub/libffms/src/core/audiosource.cpp
@@ -238,7 +238,7 @@ void FFMS_AudioSource::GetAudio(void *Buf, int64_t Start, int64_t Count) {
 				while (NewPacketNumber > 0 && !Frames[NewPacketNumber].KeyFrame) --NewPacketNumber;
 
 				// Only seek forward if it'll actually result in moving forward
-				if (Start < CurrentSample || NewPacketNumber > PacketNumber) {
+				if (Start < CurrentSample || static_cast<size_t>(NewPacketNumber) > PacketNumber) {
 					PacketNumber = NewPacketNumber;
 					Decoded = 0;
 					CurrentSample = -1;
diff --git a/aegisub/libffms/src/core/lavfindexer.cpp b/aegisub/libffms/src/core/lavfindexer.cpp
index 8213750d3..c48dfb682 100644
--- a/aegisub/libffms/src/core/lavfindexer.cpp
+++ b/aegisub/libffms/src/core/lavfindexer.cpp
@@ -50,9 +50,6 @@ FFMS_Index *FFLAVFIndexer::DoIndexing() {
 			static_cast<FFMS_TrackType>(FormatContext->streams[i]->codec->codec_type)));
 
 		if (FormatContext->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO) {
-			VideoContexts[i].Parser = av_parser_init(FormatContext->streams[i]->codec->codec_id);
-			if (!VideoContexts[i].Parser) continue;
-
 			AVCodec *VideoCodec = avcodec_find_decoder(FormatContext->streams[i]->codec->codec_id);
 			if (!VideoCodec)
 				throw FFMS_Exception(FFMS_ERROR_CODEC, FFMS_ERROR_UNSUPPORTED,
@@ -63,7 +60,9 @@ FFMS_Index *FFLAVFIndexer::DoIndexing() {
 					"Could not open video codec");
 
 			VideoContexts[i].CodecContext = FormatContext->streams[i]->codec;
-			VideoContexts[i].Parser->flags = PARSER_FLAG_COMPLETE_FRAMES;
+			VideoContexts[i].Parser = av_parser_init(FormatContext->streams[i]->codec->codec_id);
+			if (VideoContexts[i].Parser)
+				VideoContexts[i].Parser->flags = PARSER_FLAG_COMPLETE_FRAMES;
 			IndexMask |= 1 << i;
 		}
 		else if (IndexMask & (1 << i) && FormatContext->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO) {
diff --git a/aegisub/libffms/src/core/utils.cpp b/aegisub/libffms/src/core/utils.cpp
index 248f92205..a004dfa6c 100644
--- a/aegisub/libffms/src/core/utils.cpp
+++ b/aegisub/libffms/src/core/utils.cpp
@@ -30,10 +30,6 @@
 #	include <fcntl.h>
 extern "C" {
 #	include "libavutil/avstring.h"
-	/* if you have this, we'll assume you have a new enough libavutil too */
-#	if LIBSWSCALE_VERSION_INT >= AV_VERSION_INT(0, 12, 0) 
-#		include <libavutil/opt.h>
-#	endif
 }
 #endif // _WIN32
 
@@ -49,6 +45,11 @@ extern const AVCodecTag ff_codec_bmp_tags[];
 extern const CodecTags ff_mkv_codec_tags[];
 extern const AVCodecTag ff_codec_movvideo_tags[];
 extern const AVCodecTag ff_codec_wav_tags[];
+
+/* if you have this, we'll assume you have a new enough libavutil too */
+#if LIBSWSCALE_VERSION_INT >= AV_VERSION_INT(0, 12, 0)
+#	include <libavutil/opt.h>
+#endif
 }
 
 extern int CPUFeatures;