* fixing NTSC frame rate for DV streams

* let ffmpeg preserve 'aspect_ratio' for recoding.
  Do we want to make it tweakable from the command line ?

Originally committed as revision 1827 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffmpeg.c

@@ -88,6 +88,7 @@ static AVOutputFormat *file_oformat;
 static AVImageFormat *image_format;
 static int frame_width  = 160;
 static int frame_height = 128;
+static float frame_aspect_ratio = 0;
 static int frame_topBand  = 0;
 static int frame_bottomBand = 0;
 static int frame_leftBand  = 0;
@@ -2015,6 +2016,7 @@ static void opt_input_file(const char *filename)
         case CODEC_TYPE_VIDEO:
             frame_height = enc->height;
             frame_width = enc->width;
+	    frame_aspect_ratio = enc->aspect_ratio;
             rfps      = ic->streams[i]->r_frame_rate;
             rfps_base = ic->streams[i]->r_frame_rate_base;
             enc->workaround_bugs = workaround_bugs;
@@ -2171,6 +2173,7 @@ static void opt_output_file(const char *filename)
                 
                 video_enc->width = frame_width;
                 video_enc->height = frame_height;
+		video_enc->aspect_ratio = frame_aspect_ratio;
 
                 if (!intra_only)
                     video_enc->gop_size = gop_size;

libavcodec/dv.c

@@ -538,16 +538,17 @@ static int dvvideo_decode_frame(AVCodecContext *avctx,
     width = 720;
     if (dsf) {
         avctx->frame_rate = 25;
+	avctx->frame_rate_base = 1;
         packet_size = PAL_FRAME_SIZE;
         height = 576;
         nb_dif_segs = 12;
     } else {
-        avctx->frame_rate = 30;
+        avctx->frame_rate = 30000;
+	avctx->frame_rate_base = 1001;
         packet_size = NTSC_FRAME_SIZE;
         height = 480;
         nb_dif_segs = 10;
     }
-    avctx->frame_rate_base= 1;
     /* NOTE: we only accept several full frames */
     if (buf_size < packet_size)
         return -1;
@@ -723,8 +724,8 @@ static int dvaudio_decode_frame(AVCodecContext *avctx,
 
     avctx->sample_rate = dv_audio_frequency[freq];
     avctx->channels = 2;
+    avctx->bit_rate = avctx->channels * avctx->sample_rate * 16;
     // What about:
-    // avctx->bit_rate = 
     // avctx->frame_size =
    
     *data_size = (dv_audio_min_samples[sys][freq] + smpls) *