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Just a quick guide on the best way to get from a VC1 or AVC Blu-Ray to your preferred non-linear editor. I’ll assume you have copied the needed M2TS files from your disc to your drives.
-First thing to do is use EAC3TO to demux the m2ts file in to the elementary streams (such as x.vc1, y.dtsma, etc).
-Second is to use EAC3TO to convert the DTSMA file or TrueHD file to a single Flac file (for example, if your audio is six channel, so should the flac file).
-Third is to use AVANTI (FFMPEG/AVISYNTH GUI) to create a MOV that will contain the converted video and audio. You’re going to be converting the video to DnxHD 175 422 10 bit. This is a standard format used in production, is much more flexible than consumer formats, and is readily accepted by Adobe, Nuke, Avid, FCP etc. The format is also rather close to lossless to it will have the least amount of degeneration.
For the video section, you’ll want to put DnxHD as the codec, 175000 as the bit-rate* . For audio, choose PCM as the codec, match the frequency and channels to source match your source (if 5.1 use 6 channel, if 48khz use 48000).
After specifying the settings in AVANTI, be sure to put this line: -pix_fmt yuv422p10 in to the “user video options” box, and then put -acodec pcm_s24le in the user audio options (if your Blu-Ray had 16 bit audio, ignore this instruction). The resultant file will be about 150GB for a 2 hour film, so make sure you’ve plenty of storage.
*https://en.wikipedia.org/wiki/List_of_DNxHD_codec_resolutions <- This is the list of acceptable formats for DnxHD. If your videos resolution, framerate, colorspace, etc isn’t in line with those, make sure you change the settings to specify the proper resolution and framerate. Also make sure that the bit-rate your using matches the format you’re aiming for (for example, do not set the bitrate for 115 if you’re trying to do 10-bit 1080p format).
-4th step is to start encoding. It took over an hour to convert a 2 hour film, so be patient. At the end, you should have a huge .mov file.
-5th, and finally, is to throw the file in to your NLE and take a look. AV sync should be perfect, colors the same, and audio channels should be what they were in the flac. In Avid there is a menu option that allows you to “get info” on the media in question. Check and make sure that the frame rate, video resolution, video bit depth, audio sampling frequency, and audio bit depth are what they should be.