diff --git a/cinelerra-5.1/cinelerra/ffmpeg.C b/cinelerra-5.1/cinelerra/ffmpeg.C
index 96a5c385..b50c331e 100644
--- a/cinelerra-5.1/cinelerra/ffmpeg.C
+++ b/cinelerra-5.1/cinelerra/ffmpeg.C
@@ -1856,11 +1856,14 @@ int FFMPEG::check_sample_rate(AVCodec *codec, int sample_rate)
 	return 0;
 }
 
+// check_frame_rate and std_frame_rate needed for 23.976
+// and 59.94 fps mpeg2
 static inline AVRational std_frame_rate(int i)
 {
 	static const int m1 = 1001*12, m2 = 1000*12;
 	static const int freqs[] = {
 		40*m1, 48*m1, 50*m1, 60*m1, 80*m1,120*m1, 240*m1,
+		100*m2, 90*m2,
 		24*m2, 30*m2, 60*m2, 12*m2, 15*m2, 48*m2, 0,
 	};
 	int freq = i<30*12 ? (i+1)*1001 : freqs[i-30*12];
@@ -1877,8 +1880,9 @@ AVRational FFMPEG::check_frame_rate(const AVRational *p, double frame_rate)
 		if( err >= max_err ) continue;
 		max_err = err;
 		best_rate = rate;
+		//printf("framerate: %d\n", rate.num / rate.den);
 	}
-	return max_err < 0.0001 ? best_rate : (AVRational) { 0, 0 };
+	return best_rate;
 }
 
 AVRational FFMPEG::to_sample_aspect_ratio(Asset *asset)
@@ -2917,7 +2921,12 @@ int FFMPEG::open_encoder(const char *type, const char *spec)
 			int mask_h = (1<<desc->log2_chroma_h)-1;
 			ctx->height = (vid->height+mask_h) & ~mask_h;
 			ctx->sample_aspect_ratio = to_sample_aspect_ratio(asset);
-			AVRational frame_rate = check_frame_rate(codec->supported_framerates, vid->frame_rate);
+			AVRational frame_rate;
+			if (ctx->codec->id == AV_CODEC_ID_MPEG1VIDEO ||
+			    ctx->codec->id == AV_CODEC_ID_MPEG2VIDEO)
+			frame_rate = check_frame_rate(codec->supported_framerates, vid->frame_rate);
+			else
+			frame_rate = av_d2q(vid->frame_rate, 1000);
 			if( !frame_rate.num || !frame_rate.den ) {
 				eprintf(_("check_frame_rate failed %s\n"), filename);
 				ret = 1;