In the rawvideo decoder, set pkt_pts in the output frame.

Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>
(cherry picked from commit 3c802cab)

libavcodec/rawdec.c

@@ -124,6 +124,7 @@ static int raw_decode(AVCodecContext *avctx,
     frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
     frame->top_field_first = avctx->coded_frame->top_field_first;
     frame->reordered_opaque = avctx->reordered_opaque;
+    frame->pkt_pts          = avctx->pkt->pts;
 
     //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
     if (context->buffer) {