c ++ – How do I stream a mkv file?

I'm trying to create an application with Qt that plays some MKV files. I have the part that downloads these mkv files, and of course I do not want to wait until it's completely finished. I think the right term would be to "stream" it.

Since all downloaded files are in the mkv format, I have looked in the libraries libebml and libmatroska. I think I should be able to stream these video files by reading the ebml header of the mkv file and seeing together with the torrent downloader which parts have already been downloaded and depending on which the next frames are playing.

I looked at the MkvToolNix tool, which contains a lot of information. I thought I could check if the next cluster (a set of frames) was downloaded. I also get the byte location and size of this cluster so I can ask the downloader if that part has already been downloaded, and then I'll play the next cluster. But I'm not sure if my strategy is right or if I have to be so deep and technical.

My problem is that I do not know how to best stream a movie and if my method is correct or not. I also use MPV as my video player and libtorrent to download the torrents.

Libraries – Benefits of Java InputStream and OutputStream vs. .NET's Stream

Java knows separate InputStreams and OutputStreams. Your code reads from an InputStream and writes to an OutputStream.

.NET does not have this distinction, but has a single stream class into which the code can both write and read, depending on the exact implementation. Abilities can be determined by the CanRead and CanWrite properties.

I wonder if one approach has a fundamental advantage over the other. I can only think of the following:

  • Code may be more concise for a single stream if you are both reading and writing
  • The close This method can be particularly confusing or even dangerous when using separate input and output stream classes that work with the same underlying stream
  • Separate input and output stream classes make the intent of the code clearer

None of these reasons seems to me to be particularly compelling. Are there other compelling reasons I miss?

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