Mkv to mp4/m4v lossless

Discussion in 'Apple TV and Home Theater' started by Spacecowboy1, Oct 2, 2012.

  1. macrumors member

    Joined:
    Jun 11, 2012
    #1
    Hi guys

    Is there anybody out there that converting bluray MKV rips to MP4's without losing any of the original bluray quality? If so how are you going about doing it..?

    Also is it a quicker process? as I'm guessing you can use passthru on the video.
     
  2. macrumors member

    Joined:
    Jun 3, 2010
    #2
    MakeMKV does not transcode the audio or video.

    Sorry misread your post you could demux the audio and video streams with mkvtoolnix and then remux using ffmpeg.
     
  3. thread starter macrumors member

    Joined:
    Jun 11, 2012
    #3
    By that do you mean the mkv will be lossless?

    ----------

    That sounds a bit complicated!! Lol
     
  4. macrumors 68020

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    Mar 15, 2012
    #4
    You can change the mkv container to an mp4 container using Subler (free).
     
  5. thread starter macrumors member

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    Jun 11, 2012
    #5
     
  6. macrumors 68020

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    Mar 15, 2012
    #6
     
  7. thread starter macrumors member

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    Jun 11, 2012
    #7
    i dont know whether this is me doing something wrong but I've tryed converting a mkv to mp4 3 times now and not one of them will play afterwards. i process finishes ok and i get an m4v ouput file but it wont play.

    when i try open it in quicktime i get the following error

    the document"Headhunters.m4v" could not be opened the movie file format isnt recognised.

    i also get this from mplayerx

    error

    oops, it seams that mplayer has quit without playing the media.

    also videospec doesn't recognise the file!!

    this is the process im doing in subler

    1. open subler

    2.file > open > headhunters.mkv

    3. i then get a dialog box to select tracks

    4. i select the video track, audio tracks , subs and chapter tracks

    5. press add

    6.press file > save
    and save to a location

    i then get a choice of file format video-mpeg4 or movie-mpeg4

    then subler starts saving which takes about 5-10mins then i get the file thats unplayable.

    am i missing something here?
     
  8. macrumors 68020

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    Mar 15, 2012
    #8
    Does the mkv use the h.264 codec?
     
  9. macrumors regular

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    Jul 19, 2012
    Location:
    Northwest Ohio
    #9
    Also, make sure that 64-bit chunk offset is checked in Subler.
     
  10. macrumors 65816

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    Sep 10, 2007
    Location:
    Southern California
    #10
    I use the aTV2 setting in handbrake to convert MKv tv shows I get. They work just fine as m4v files, the downside is that they usually end up being a bigger file size afterwards. But they play fine.
     
  11. macrumors newbie

    Joined:
    Sep 8, 2010
    #11
    You should be using something like XMedia Recode which doesn't touch the video, just converts the audio to atv suitable format, and puts in m4v container. Only takes a couple of minutes to do an episode, and it's basically the same size afterwards.
     
  12. macrumors 68020

    Joined:
    Mar 15, 2012
    #12
    Note that he is in the apple ecosystem. XMedia Recode is Windows only. Subler has the same function in the Mac environment. Also, transcoding is required if original file does not use the h.264 codec.
     
  13. macrumors 603

    Joined:
    Jun 7, 2011
    #13
    Definitely. Subler converts DTS / AC3 subtracks to AAC just fine (if you don't have a hardware decoder, connected to your ATV, to decode AC3). Let me know if you need my tutorial on using the audio converter support under ML and I'll dig up the link (posted it in some of the threads here).

    ----------

    Are they "scene" (read: pirated) rips, or, original ones? The former are very easy to convert as they "only" have DTS / AC3 audio and textual subtitles; the latter may be much more complicated (VC-1 video, HD audio, BD subs - all require conversion).
     
  14. thread starter macrumors member

    Joined:
    Jun 11, 2012
    #14
    Thanks Cinephi1e that was the missing link! everything worked fine after that the subs are now working in iTunes, but theres one big problem!!!!
    on the subs the letter 'l' is been replaced by a forward slash '"/" im guessing the ocr recognision is having problems with the letter "l" is there anything i can do about this? when i load the .sup into BDsup2sub the first window of text matches the second window on the problem area....ive looked for a manual for BDsup2sub but i cant find anything.
     
  15. thread starter macrumors member

    Joined:
    Jun 11, 2012
    #15

    these are blurays that i have bought and ripping myself and the contents for the city of god are:-

    video(h264)
    audio(dts) 3/2+1
    subtitle(pgs)
    subtitle(pgs)
     
  16. thread starter macrumors member

    Joined:
    Jun 11, 2012
    #16
    oh it gets worse the text on the screenshot is ment to say "Shaggy"
     

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  17. macrumors 65816

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    Jun 10, 2005
    Location:
    Australia
    #17
    You need to tick the "64 bits chunk offset" box for files bigger than 4gb. It's a file size limitation.
     
  18. macrumors 68020

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    Mar 15, 2012
    #18
    I would suggest using Jubler to edit the files. Common for OCR apps to make these types of errors.
     
  19. thread starter macrumors member

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    Jun 11, 2012
    #19
    would i need to go through each sentance and manually edit the bad text?
     
  20. thread starter macrumors member

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    Jun 11, 2012
    #20
    while where on the subject of lossless do you guys think its worth it? i mean were talking 25gb+ lossless vs between 1gb and 5gb encoded. obviously the latter is more appropriate for the likes of iOS devices but for the aTV the only restrictions are the size of your hard drive(s)
     
  21. macrumors regular

    Joined:
    Sep 26, 2007
    #21
    You do realize that the aTV won't play lossless HD audio formats though, right? You have to convert it to Dolby Digital first.
     
  22. thread starter macrumors member

    Joined:
    Jun 11, 2012
    #22
    yes seems a shame!! when i look inside the mkv container the audio format is DTS Coherent Acoustic is that HD? and why wont the aTV support that is it some sort of hardware restrictions/limitations?....or is it just apple being apple?(sorry had to get that in!!)
     
  23. macrumors 603

    Joined:
    Jun 7, 2011
    #23
    What did you use for text OCR? SubRip? Did you know the latest version of Subler have excellent OCR'ing capabilities?

    ----------

    Nope, DTS Coherent Acoustics is the same as the plain (compressed) DTS. Nevertheless, not even that can be decoded by the ATV3 - and can't be passed to an external decoder either. That is, you must convert them to AC3 (if you do have an external decoder) or, even worse, AAC (if you don't have an external decoder).

    For this conversion, Subler is just fine. By importing an MKV file twice and, in the second import, you deselect everything but the audio track, you can have both an AC3 and an AAC audio track in your target M4V.
     
  24. thread starter macrumors member

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    #24
     
  25. macrumors 603

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    #25
     

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