/// <summary> /// Demultiplex multiplexed packs together each streamId at a time + removing bad packs + fixing displaytimes /// </summary> /// <returns>List of complete packs each with a complete sub image</returns> public List <VobSubMergedPack> MergeVobSubPacks() { var list = new List <VobSubMergedPack>(); var pts = new TimeSpan(); var ms = new MemoryStream(); int streamId = 0; bool continuation = false; float ticksPerMillisecond = 90.000F; //if (!IsPal) // ticksPerMillisecond = 90.090F; TODO; What should this be for NTSC? // get unique streamIds var uniqueStreamIds = new List <int>(); foreach (var p in VobSubPacks) { if (p.PacketizedElementaryStream != null && p.PacketizedElementaryStream.SubPictureStreamId.HasValue && !uniqueStreamIds.Contains(p.PacketizedElementaryStream.SubPictureStreamId.Value)) { uniqueStreamIds.Add(p.PacketizedElementaryStream.SubPictureStreamId.Value); } } IdxParagraph lastIdxParagraph = null; foreach (int uniqueStreamId in uniqueStreamIds) // packets must be merged in streamId order (so they don't get mixed) { foreach (var p in VobSubPacks) { if (p.PacketizedElementaryStream != null && p.PacketizedElementaryStream.SubPictureStreamId.HasValue && p.PacketizedElementaryStream.SubPictureStreamId.Value == uniqueStreamId) { if (!continuation) { if (ms.Length > 0) { list.Add(new VobSubMergedPack(ms.ToArray(), pts, streamId, lastIdxParagraph)); } ms = new MemoryStream(); pts = TimeSpan.FromMilliseconds( Convert.ToDouble(p.PacketizedElementaryStream.PresentationTimeStamp / ticksPerMillisecond)); //90000F * 1000)); (PAL) streamId = p.PacketizedElementaryStream.SubPictureStreamId.Value; } lastIdxParagraph = p.IdxLine; continuation = p.PacketizedElementaryStream.Length == PacketizedElementaryStreamMaximumLength; ms.Write(p.PacketizedElementaryStream.DataBuffer, 0, p.PacketizedElementaryStream.DataBuffer.Length); } } if (ms.Length > 0) { list.Add(new VobSubMergedPack(ms.ToArray(), pts, streamId, lastIdxParagraph)); ms = new MemoryStream(); } } // Remove any bad packs for (int i = list.Count - 1; i >= 0; i--) { VobSubMergedPack pack = list[i]; if (pack.SubPicture == null || pack.SubPicture.ImageDisplayArea.Width <= 3 || pack.SubPicture.ImageDisplayArea.Height <= 2) { list.RemoveAt(i); } } // Fix subs with no duration (completely normal) or negative duration or duration > 10 seconds for (int i = 0; i < list.Count; i++) { VobSubMergedPack pack = list[i]; if (pack.SubPicture.Delay.TotalMilliseconds > 0) { pack.EndTime = pack.StartTime.Add(pack.SubPicture.Delay); } if (pack.EndTime < pack.StartTime || pack.EndTime.TotalSeconds - pack.StartTime.TotalSeconds > 10.0) { if (i + 1 < list.Count) { pack.EndTime = TimeSpan.FromMilliseconds(list[i].StartTime.TotalMilliseconds - 100); } else { pack.EndTime = TimeSpan.FromMilliseconds(pack.StartTime.TotalMilliseconds + 3000); } } } return(list); }