fbdev,v4l2: remove some forgotten uses of AVFormatParameters.time_base.

libavdevice/fbdev.c

@@ -169,7 +169,7 @@ av_cold static int fbdev_read_header(AVFormatContext *avctx,
     st->codec->width      = fbdev->width;
     st->codec->height     = fbdev->heigth;
     st->codec->pix_fmt    = pix_fmt;
-    st->codec->time_base  = ap->time_base;
+    st->codec->time_base  = (AVRational){fbdev->fps.den, fbdev->fps.num};
     st->codec->bit_rate   =
         fbdev->width * fbdev->heigth * fbdev->bytes_per_pixel * av_q2d(fbdev->fps) * 8;
 

libavdevice/v4l2.c

@@ -546,6 +546,8 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap)
             return AVERROR(errno);
         }
     }
+    s1->streams[0]->codec->time_base.den = tpf->denominator;
+    s1->streams[0]->codec->time_base.num = tpf->numerator;
 
     return 0;
 }
@@ -679,8 +681,6 @@ static int v4l2_read_header(AVFormatContext *s1, AVFormatParameters *ap)
     st->codec->codec_id = codec_id;
     st->codec->width = s->width;
     st->codec->height = s->height;
-    st->codec->time_base.den = ap->time_base.den;
-    st->codec->time_base.num = ap->time_base.num;
     st->codec->bit_rate = s->frame_size * 1/av_q2d(st->codec->time_base) * 8;
 
 out: