mxfenc: support 50 and 60 frame rates

Reviewed-by: Tomas Härdin <tomas.hardin@codemill.se>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/mxfenc.c

@@ -44,8 +44,10 @@
 #include "internal.h"
 #include "mxf.h"
 
-static const int NTSC_samples_per_frame[] = { 1602, 1601, 1602, 1601, 1602, 0 };
-static const int PAL_samples_per_frame[]  = { 1920, 0 };
+static const int NTSC_samples_per_frame[]    = { 1602, 1601, 1602, 1601, 1602, 0 };
+static const int NTSC_60_samples_per_frame[] = { 801, 801, 801, 801, 800, 0 };
+static const int PAL_samples_per_frame[]     = { 1920, 0 };
+static const int PAL_50_samples_per_frame[]  = { 960, 0 };
 
 extern AVOutputFormat ff_mxf_d10_muxer;
 
@@ -1423,10 +1425,18 @@ static int mxf_write_header(AVFormatContext *s)
                 samples_per_frame = PAL_samples_per_frame;
                 mxf->time_base = (AVRational){ 1, 25 };
                 mxf->timecode_base = 25;
+            } else if (fabs(av_q2d(st->codec->time_base) - 1/50.0) < 0.0001) {
+                samples_per_frame = PAL_50_samples_per_frame;
+                mxf->time_base = (AVRational){ 1, 50 };
+                mxf->timecode_base = 50;
             } else if (fabs(av_q2d(st->codec->time_base) - 1001/30000.0) < 0.0001) {
                 samples_per_frame = NTSC_samples_per_frame;
                 mxf->time_base = (AVRational){ 1001, 30000 };
                 mxf->timecode_base = 30;
+            } else if (fabs(av_q2d(st->codec->time_base) - 1001/60000.0) < 0.0001) {
+                samples_per_frame = NTSC_60_samples_per_frame;
+                mxf->time_base = (AVRational){ 1001, 60000 };
+                mxf->timecode_base = 60;
             } else {
                 av_log(s, AV_LOG_ERROR, "unsupported video frame rate\n");
                 return -1;