FFmpeg: Use range coder for FFV1 to reduce output size

CHANGES

@@ -15,6 +15,7 @@ Other fixes:
  - Qt: Fix Italian RTC translation (fixes mgba.io/i/1798)
  - Util: Fix crash if PNG header fails to write
 Misc:
+ - FFmpeg: Use range coder for FFV1 to reduce output size
  - Qt: Add per-page scrolling to memory view (fixes mgba.io/i/1795)
  - Qt: Add setting to display ROM filename in title (closes mgba.io/i/1784)
 

src/feature/ffmpeg/ffmpeg-encoder.c

@@ -378,6 +378,11 @@ bool FFmpegEncoderOpen(struct FFmpegEncoder* encoder, const char* outfile) {
 			// QuickTime and a few other things require YUV420
 			encoder->video->pix_fmt = AV_PIX_FMT_YUV420P;
 		}
+#if LIBAVCODEC_VERSION_MAJOR >= 57
+		if (encoder->video->codec->id == AV_CODEC_ID_FFV1) {
+			av_opt_set(encoder->video->priv_data, "coder", "range_tab", 0);
+		}
+#endif
 
 		if (strcmp(vcodec->name, "libx264") == 0) {
 			// Try to adaptively figure out when you can use a slower encoder