Does Nero Recode support the lossless ripping of Blu Ray and DVD to the MKV format?

I want to rip some DVD and BluRay disc and do not want to lose any video and audio quality. The MKV format has the ability to contain these, but can Nero Recode rip them to MKV in a lossless format? I just see settings for transcoding quality which would imply that it is not lossless and image video quality could be lost.
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  • Recode supports recoding to .mkv. Since .mkv is a container format, I would think there would be very little compression during the encoding. However, either tech support or, perhaps Mister_M or Hg-dude could better answer that question. I see no reason why you would lose any quality during the recode operation unless you purposesly selected a resolution less than the original or if you selected DVD as the target for a blu-ray conversion to .mkv.

    Note that you won't be able to recode copy protected media.
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  • I found some information in the documentation that indicated that a 3D Blu Ray would be converted to 2D when exporting as a MKV file, so that also led me to believe that there was some transcoding going on.
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    At first: If you want to rip commercial (copy-protected) discs, this isn't possible with Nero Recode.

    Lossless encoding of a DVD-Video to mkv is possible, if you use the H.264 video codec (standard option for MKV in Nero Recode) with about two-thirds of the original video bit rate and pass the audio through.

    Lossless encoding of blu-rays isn't possible with any software, since the MKV container doesn't officially allow HD audio tracks. Dolby TrueHD, Dolby Digital Plus and DTS-HD will be converted with their audio cores, which means, that the audio-output will be Dolby Digital or DTS.

    Theoretically the lossless encoding of the picture is possible by using the same video bit rate as in the source video. But this leads away from the original intent of the MKV container format (save space but keep the picture quality nearly as good as the original).

    As far as I know, Nero Recode supports up to 20 MBit/s video bit rate, which is more than suitable for a Full-HD MKV file. You won't recognize a quality difference in the picture.
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  • Yes, 3D will be "converted" to 2D. Stereoscopic 3D content contains two 2D-pictures, which are laid over each other to create the 3D effect. So there's no need to transcode the video. Since both pictures are stored on the disc simultaneously, there can also be recoded only one of those 2D-video streams.
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