FFmpeg: Fix some small memory leaks

CHANGES

@@ -31,6 +31,7 @@ Other fixes:
  - All: Correct format strings for some numbers on Windows (fixes mgba.io/i/1794)
  - Core: Ensure ELF regions can be written before trying
  - Debugger: Don't skip undefined instructions when debugger attached
+ - FFmpeg: Fix some small memory leaks
  - GB Core: Fix extracting SRAM when none is present
  - GBA Savedata: Fix extracting save when not yet configured in-game
  - Qt: Force OpenGL paint engine creation thread (fixes mgba.io/i/1642)

src/feature/ffmpeg/ffmpeg-encoder.c

@@ -546,8 +546,12 @@ void FFmpegEncoderClose(struct FFmpegEncoder* encoder) {
 #endif
 	}
 	if (encoder->audio) {
+#ifdef FFMPEG_USE_CODECPAR
+		avcodec_free_context(&encoder->audio);
+#else
 		avcodec_close(encoder->audio);
 		encoder->audio = NULL;
+#endif
 	}
 
 	if (encoder->resampleContext) {
@@ -569,6 +573,7 @@ void FFmpegEncoderClose(struct FFmpegEncoder* encoder) {
 	}
 
 	if (encoder->videoFrame) {
+		av_freep(encoder->videoFrame->data);
 #if LIBAVCODEC_VERSION_MAJOR >= 55
 		av_frame_free(&encoder->videoFrame);
 #else
@@ -586,8 +591,12 @@ void FFmpegEncoderClose(struct FFmpegEncoder* encoder) {
 	}
 
 	if (encoder->video) {
+#ifdef FFMPEG_USE_CODECPAR
+		avcodec_free_context(&encoder->video);
+#else
 		avcodec_close(encoder->video);
 		encoder->video = NULL;
+#endif
 	}
 
 	if (encoder->scaleContext) {