+ pkt->pts = (off - s->internal->data_offset) / s->packet_size;
+ pkt->duration = 1;
+ return 0;
+}
+
+static int yuv4_read_seek(AVFormatContext *s, int stream_index,
+ int64_t pts, int flags)
+{
+ avio_seek(s->pb, pts * s->packet_size + s->internal->data_offset, SEEK_SET);