With MC displaying 2 channels in the tag info, that reinforced my belief. I thought that DD 5.1 was compressed multichannel audio delivered via 2 channels, but maybe I'm mixing that up with SPDIF. I also believe (though it is hard to find good references now) that
#J river media center tidal bitstreaming mp4#
MP4 does "officially" support AC3, but many of the most popular players do not. But MediaInfo will tell you what is inside it, so just look. If you ripped that disc, and it converted it to AAC, it probably converted it to stereo. Therefore, it is probably assumed if you're ripping to MP4 that you can't play back an AC3 track at all. If they allow AC3 to be passed through to MP4, it is usually not one of the "default profiles" and you have to enable it manually. That's pretty common among the rippers out there.
Most notably, iDevices won't play AC3 tracks when using the built-in video players, and iTunes only supports AC3 passthrough (bitstreaming) and can't actually decode AC3. FWIW, RipBot doesn't allow AC3 in MP4 because, while it is (now, not originally) officially supported in the MP4 spec, many popular players don't. Assuming my guess of the re-encoding in MC's DSP isn't correct, then please just figure out what is actually inside the files you're using. You have a file ripped from a DD 5.1 DVD and it presumably has two channels? Huh? Or.does it mean that my particular HDMI port (or the device connected to it) doesn't support discrete channels? This might be answered by the answer to the first question, but I would have thought that bitstreaming would just output whatever the original soundtrack was (DD 5.1 in 2 channels) without trying to convert to discrete channels.
If I choose HDMI, it says words to the effect of "cannot output 6ch but 2ch would work". It will only play if I choose SPDIF as the bitstreaming format. mkv file ripped from a music concert DVD and it has a DD 5.1 soundtrack, so presumaly that's 2 channels. Does HDMI mean uncompressed multichannel audio in discrete channels and SPDIF mean multichannel compressed audio into 2 channels? If so, if HDMI is chosen, would MC "uncompress" a DD 5.1 soundtrack into discrete channels for output?Ģ. If I choose bitstreaming, why are there options for HDMI, SPDIF and what do they do? As I understood it, bitstreaming just outputs whatever was in the file without any processing.
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