#Ac3 448 kbps dvd trouble full#
Highly recommended, at least until Blu-ray Audio get's going full steam. But if you own one, DVD-A discs area really a lot of fun. DVD-Audio is another story, but as I posted earlier, not all players even deal with DVD-A these days. If it's sent to a receiver for decoding, that's fine. Even if a player can play 24/96, the internal DACs are probably not 24bit, so there's little point.
PCM tracks on video have always been limited to two channels, and usually 16/48 at that. 5.1 channels of 24/96 would take it all, no room for video left, hence, AC3, Dolby Digital. Every player can do at least 2 channel PCM, but 24/96 stereo burns half the available bit rate, which is why it's not done, and may not be supported by all players. Not every player can deal with 24/96, and none over 2 channels, with video too. You need to start with that bit rate, subtract it from the total peak available, then make the video fit in too. Audio coding isn't quite the same, and of course, 24/96 isn't coded, just packed. The first pass in effect measures the required bandwidth moment by moment, the second pass uses that data to adjust the encoder. You dial in an average, minimum, maximum, and do a two-pass encode. Remember, video compression is, when it's done right, variable depending on content. Most recommendations warn you to stay below 8 or 9Mbps, peak. I can't remember offhand how it all adds up and exactly what the limits are - anyone?DVD basic max bit rate is just over 11Mbps, but for an actual video + audio file, it's 10Mbps max, and you don't really want to hang it there, just peak near that occasionally. if you are running typical video bitrates you won't be able to accommodate 5 channels of 24/96. BUT there are restrictions on the overall bit-rate - i.e. Or maybe I just send two or three formats/settings in future just to make sure the thing works.ĭVD-V supports audio up to 24/96. Personally, I am looking forward to simply being able to show from a (possibly HD) Quicktime file in future. I often need to send my work for curator viewing, so making sure the thing works is vital for art shows. ).įailing that I will go for 448kpbs Ac3 audio bitrate setting.
Hoping to try and hijack laptop monitor with it for test. However, I will give that one a go and experiment (have cheap DVD player but no monitor. However, most current receivers can't decode high-definition, multichannel PCM audio (see 3.6.1 for details), and even if they could it can't be carried on standard digital audio connections." output PCM and Dolby Digital, and some will support the optional DTS and DSD formats. "DVD-Audio players (and universal players). I was under the mistaken impression that PCM was not compatible with all your average DVD players: Thank you jaddie and monomono for your replies! Don't do any RF limiting, that's for broadcast, and the broadcast guys do it all for you anyway. More importantly, if you're using Compressor, turn off all that dynamic range film-type limiting! It defaults to "on", you have to dig in and turn it off. I've found that my 5.1 tracks do sound noticably duller than my master tracks, but it's the kind of thing you could pre-eq out. The high frequency material is actually steered around as needed. It takes advantage of the fact that HF stuff doesn't happen in all channels at once, and HF burns coding bandwidth. What AC3 does, especially in 5.1, is increase the channel count but you don't actually have 5 full bandwidth channels 100% of the time. When you author, you can do a little audio track selection menu and let people pick Dolby Digital 2.0 or Uncompressed Higher than Hi Fi, or whatever. If it matters that much, might as well put it in there. The reason for AC3 was to pack more stuff on the disc, especially with 5.1. Everything is supposed to be able to play it. However, that said, within the DVD standard exists the possibility of a stereo 16 bit 48KHz uncompressed track. I've done several 5.1 tracks, never had an issue. Would be very grateful for an answer!Well, the default in Compressor for Dolby Digital 5.1 is 448, so that can't cause "jamming". I don't know if any of that is true or even current. Wiki says 448 max, but some write 448 may cause jamming on DVD players and there are disadvantages for the video with 448. Focus has also mainly been on 5.1, not simple stereo or 2 channels.Ī member on GS wrote 224 as "pretty good" for 2 channels. I am an audio freak and do not want standard or even reasonable - I want the best ac3 setting I can get for my own work. Web forums usually write 192 as standard.
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