![]() The only current method I have found of making true 1:1 MKV's is for a Blu-ray workflow of:Įac3to to extract streams from the physical disc.īDSup2Sub to check subs for forced subtitles (optional). Having repeated these tests with MKV Merge, he streams remain identical. The extracted m2v files from the MakeMKV output do not match the extracted streams made from the disc with DVD Decrypter or PGC Demuxer. Not 100% sure if this is the problem, but the symptoms seem to match the theory. ![]() Nothing like PAL at 4%, but still not a 1:1 copy. This also means you are altering the pitch of the audio slightly. This minor speedup causes the film duration to be shorter by ~. 29.97 fps material being processed as 30 fps, and likewise 23.97 fps material processed as 24 fps. ![]() It looks like this may be a frame rate issue. The reported duration of a title actually appears to decrease a couple of seconds after MakeMKV handles it. MakeMKV is supposed to just be putting the streams in a container, the same as MKV Merge.įurther, after investigating the output from MakeMKV for DVD's (MPEG2), MakeMKV appears to actually be altering the duration of the title. ![]() If you believe eac3to's frame count is wrong, there are other programs you can use to get frame counts for these streams.Īccording to the creator of MakeMKV, the streams extracted back out of the MKV with eac3to should be identical to the streams extracted from the physical disc, all the way down to identical MD5 checksums. Then you will also have to extracted streams. If they are in the same folder, call it TronMKV.h264 or some other name so it doesn't rewrite the stream. This assumes your mkv and m2ts are in different folders. Then do the same again, but substitute your mkv filename and on the MKV it will beīecause the h264 stream is the first item in your MKV. Or if you want to avoid all that command line typing, you can download the HDBRStreamExtractor, which is a GUI for the eac3to command line. eac2to will generate a txt file that includes a frame count. This will give you a file called Tron.h264 in the same folder as the source (or you can specify a path if you are ripping from a disc). You have to demux to get the frame count. MKV, 1 video track, 1 audio track, 1 subtitle track, 1:35:47, 24p /1.001Ģ: DTS Master Audio, 5.1 channels, 24 bits, 48kHz M2TS, 1 video track, 1 audio track, 1 subtitle track, 1:35:47, 24p /1.001ģ: DTS Master Audio, English, 5.1 channels, 24 bits, 48kHz How are you getting frame information from eac3to? Here is what I get from eac3to for Tron (the original): Then use eac3to to re-extract the individual streams to see if they are still identical to the source, or if the MKV container alters the streams. My next step is to use eac3to to extract all the individual streams from the disc, and then remux them together with MKVMerge. ![]() MKV generating programs appear to be altering the source. I have now performed this test on multiple BD discs (have yet to try DVD's) and get similar results regardless of the title. I thought the size difference might be attributed to some sort of header compression or something of that nature, but header compression shouldn't alter the actual number of frames in the stream. Yet the total file size of extracted H264 streams is nearly identical (identical for the source BD and DVD Fab movie only m2ts, slightly different for the rest, but only a few hundred k). It almost appears as if it is doubling the number of frames. I don't know what is going on with MakeMKV either. But at this point, I don't believe that any of these MKV generating programs are actually giving us 1:1 rips. It would be nice if someone else could repeat this test to verify. I use the same command line in each case, only changing the source file portion of the command line. I mean, with MakeMKV its simply drop the disc in, click a button, and you have your MKV.Įac3to is straightforward to use and I simply extract the H264 stream from the final output of these programs. I don't see how there can be anything in my process to skew the results. ![]()
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