Seek regression for RM demuxer fix

Originally committed as revision 10907 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/rm.h

@@ -51,6 +51,7 @@ typedef struct {
     int videobufpos;   ///< position for the next slice in the video buffer
     int curpic_num;    ///< picture number of current frame
     int cur_slice, slices;
+    int64_t pktpos;    ///< first slice position in file
     /// Audio descrambling matrix parameters
     uint8_t *audiobuf; ///< place to store reordered audio data
     int64_t audiotimestamp; ///< Audio packet timestamp

libavformat/rmdec.c

@@ -486,6 +486,7 @@ static int rm_assemble_video_frame(AVFormatContext *s, RMContext *rm, AVPacket *
         rm->videobufpos = 8*rm->slices + 1;
         rm->cur_slice = 0;
         rm->curpic_num = pic_num;
+        rm->pktpos = url_ftell(pb);
     }
     if(type == 2){
         len = FFMIN(len, pos);
@@ -512,6 +513,8 @@ static int rm_assemble_video_frame(AVFormatContext *s, RMContext *rm, AVPacket *
          if(av_new_packet(pkt, ssize) < 0)
              return AVERROR(ENOMEM);
          memcpy(pkt->data, rm->videobuf, ssize);
+         pkt->pts = AV_NOPTS_VALUE;
+         pkt->pos = rm->pktpos;
          return 0;
     }