use dprintf

Originally committed as revision 13423 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/ffmdec.c

@@ -364,10 +364,8 @@ static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt)
         if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE)) {
             return AVERROR(EAGAIN);
         }
-#if 0
-        printf("pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
+        dprintf(s, "pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
                url_ftell(s->pb), s->pb.pos, ffm->write_index, ffm->file_size);
-#endif
         if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) !=
             FRAME_HEADER_SIZE)
             return AVERROR(EAGAIN);