Leave the values for qmin and qmax at their default values except

for mpeg2. Changing them for the other codecs resultet in exporting
with the wrong bitrate.

Author: eisneinechse

src/FFmpegWriter.cpp

@@ -1202,8 +1202,10 @@ AVStream *FFmpegWriter::add_video_stream() {
 		) {
 		c->bit_rate = info.video_bit_rate;
 		if (info.video_bit_rate >= 1500000) {
-			c->qmin = 2;
-			c->qmax = 30;
+	        if (c->codec_id == AV_CODEC_ID_MPEG2VIDEO)  {
+                c->qmin = 3;
+                c->qmax = 30;
+            }
 		}
 		// Here should be the setting for low fixed bitrate
 		// Defaults are used because mpeg2 otherwise had problems