VideoHelp Forum




+ Reply to Thread
Results 1 to 6 of 6
  1. Okay.. here's what I WANT to do:
    Take an already decoded Blu-Ray movie (I have AnyDVDHD) and turn it into a MKV file of about 8GB -- keeping the resolution of the file at 1920x1080 and keeping a 5.1 audio track.

    Now, I CAN do the above using RipBot264, but I'm having a real problem with the resultant file. Even though I tell RipBot to re-encode the audio in 5.1 AC3, in MediaPlayer Classic, the file will only play back in stereo (EDIT! See post #4, I fixed this issue, but the VLC issue remains). The video in MPC is fine. The same file when I try to play it in VLC 1.0.5 has real trouble with the video (it just can't seem to decode it well). I CAN play the original 30+GB .m2ts file in VLC just fine, so I don't know what the issue is here. My PC is a Q9450 with 8GB of RAM running Win7 64-bit, vid card is a GTX280, so I have the necessary hardware power for this.

    What is RipBot doing that these files aren't easily playable and how can I fix it?
    Last edited by jg0001; 28th Mar 2010 at 21:13.
    Quote Quote  
  2. I'm a MEGA Super Moderator Baldrick's Avatar
    Join Date
    Aug 2000
    Location
    Sweden
    Search Comp PM
    What does mediainfo say about the audio in the mkv?
    What audio track are you choosing in ripbot264?
    Quote Quote  
  3. RipBot pulls the default track. In this case, I'm working on shrinking both Twilight and New Moon for my wife, and the primary language track for each is DTS-MA. For both the MKV and MP4 file output, I tried the highest bitrate choice given, for MKVs, this is listed as Aften 5.1 640 Kbps. (MediaInfo confirms this as AC-3, 640Kbps, 48.0 KHz, 6 channels). For video, I use the 4.0 profile in RipBot and don't make any other changes. I run a 2-pass encode at 8192 Kbps, keeping the 1920x1080 resolution and the reported 23.976 fps. MediaInfo confirms all of that.

    If I use the AVCHD container choice (in RipBot), it then provides me a choice to copy the original audio stream. I may try that to see how it works out, but it adds a few gigabytes to the size and could be a problem as I really wanted to convert down to DD5.1 audio for compatibility.

    Quite simple, I just want to (1) compress the video to 1/4th or so original size, without any other change to it and (2) convert any audio to Dolby Digital 5.1. I'd like the resultant file to be MKV as that keeps the chapter info for playback on my WD Live box, if I choose to use that.

    Surely other people must want to do the same? Many of the guides on here, however, seem content to downgrade all the way to stereo audio (which I don't want) and/or reduce the resolution. I understand why they'd do that, but that is not what I want.
    Quote Quote  
  4. Okay... I figured out my issue as far as getting Media Player Classic to do 5.1 off of the MKV file. I just right click while playing the video, select FILTER, then AC-3 (or DTS or AAC, whichever shows up in the list), then setting ALL of them to Decode to 3Front+2Rear and select the LFE checkbox (also, uncheck AAC Decoder "downmix to stereo"). So great, now I can play those files in MPC, but why can't VLC seem to play the video? It plays about 2-3 seconds after I scan and then the video stops and only the audio plays, with the video going into more of a slideshow mode (1 video frame every few seconds). Weird. Again, this only happens with MKV files that I've created (in VLC, which can't even show a "time" on the slider), but not with any MKV files I've procured otherwise.
    Quote Quote  
  5. VLC doesn't do multithreaded H.264 decoding. I wouldn't recommend it for playback of 1080p H.264, especially high-bitrate/complexity videos, because on slower computers it won't be able to keep up. (I have no idea why the original 30GB video plays fine in VLC, though.)

    Stick with MPC-HC or another capable player.
    Quote Quote  
  6. Oddly enough I noticed the following...

    I have 3 PCs... 2 of them are overclocked Q6600's (@ 3.0 GHz), and the other is the Q9450 (@ 3.2) previously mentioned. All are running Win 7 64-bit.

    That third one's version of VLC (may be prior to 1.0.5, I need to check), can play the original and shrunk versions fine. The other 2 (in VLC 1.0.5) cannot, though they do now play the MKV files fine in Media Player Classic. (That 3rd PC has the weakest video card of the three, so that isn't the explanation.) Maybe it's Haali media splitter or ffdshow, or something else messing things up, but I thought VLC didn't rely on those anyway. I don't get it.

    For now, I think I will stick with MPC-HC now that I have it working the way I want. I also use Arcsoft's TotalMedia Theatre for the actual Blu-Ray rips (it does HD-DVD too, which is nice).
    Quote Quote  



Similar Threads

Visit our sponsor! Try DVDFab and backup Blu-rays!