diff --git a/libavformat/avisynth.c b/libavformat/avisynth.c
index e41e1c0..18e40f0 100644
--- a/libavformat/avisynth.c
+++ b/libavformat/avisynth.c
@@ -122,6 +122,14 @@ static int avisynth_read_header(AVFormatContext *s, AVFormatParameters *ap)
                   st->codec->bit_rate = (uint64_t)stream->info.dwSampleSize * (uint64_t)stream->info.dwRate * 8 / (uint64_t)stream->info.dwScale;
                   st->codec->codec_tag = imgfmt.bmiHeader.biCompression;
                   st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, imgfmt.bmiHeader.biCompression);
+				  if (st->codec->codec_id == CODEC_ID_RAWVIDEO && imgfmt.bmiHeader.biCompression== BI_RGB) {
+				    st->codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE);
+				    if (st->codec->extradata) {
+					st->codec->extradata_size = 9;
+					memcpy(st->codec->extradata, "BottomUp", 9);
+				    }
+				  }
+
 
                   st->duration = stream->info.dwLength;
                 }
@@ -165,7 +173,7 @@ static int avisynth_read_packet(AVFormatContext *s, AVPacket *pkt)
 
   res = AVIStreamRead(stream->handle, stream->read, stream->chunck_samples, pkt->data, stream->chunck_size, &read_size, NULL);
 
-  pkt->pts = stream->read;
+  //pkt->pts = stream->read;
   pkt->size = read_size;
 
   stream->read += stream->chunck_samples;