Can ripbot264 direct stream copy the audio from hddvd and bluray?

[yoda313]

So can ripbot264 direct stream copy the audio from hddvd and bluray sources?

I recently did a more or less successful conversion of a hd-dvd to mp4 avc with aac 5.1 audio. However I can't get 5.1 off the aac on my older Sony 5.1 amp. It does dolby digital and dts but it is pre hdmi. It is the STR-DE475 model.

I can get 5.1 dolby digital or dts off bluray discs from my ps3 on to the sony amp via fiber optic. I'd like the same ability on my compressed mp4 files. Is there a direct copy option or do you have to convert to aac for a mp4 container?

I do realize of course that my older model does not have the ability to process dolby true hd or dts master audio. I'm ok with that (I'm not ready to buy a new amp while it still works). What I want is to get the same auto downconvert ability the ps3 has to produce playable dolby or dts 5.1 from the high def formats. I'm ok with sacrificing a little more video quality to get full 5.1 audio (this is intended to fit on a dual layer dvd - I don't have a bluray burner yet).

Your insights into aac audio and compatibiility are appreciated. FYI I did set the aac output in the ps3 as a test and I did not get any audio off the test file. I deselected aac from digital out and went back to outputting dolby digital and dts and was able to hear the sample again. FYI it was stereo only.

[redwudz]

'X-copy' in RipBot for the audio should give you a direct copy. Works with MKV formats anyway. You could also use tsMuxeR GUI to demux out the audio format you want, then mux it back with the converted video.

Not much experience with eac3to for audio conversions, but it may also be a useful tool for your purposes. It's in the RipBot tools folder.

[yoda313]

@redwudz - thanks.

So I'll have to look into x-copy next chance I get to try this. If it works with mkv shouldn't it work with MP4?

Is muxing a time intensive procedure? I mean hours versus tens of minutes??? Remember I'm using a dual core 2.7ghz amd processor. If it would be no more than an hour or so muxing would be an option. If it would be hourS than I might not like that.

I'll also check out eac3to as well.

As a side question what is the "average" file size for the audio only portion of say a dolby true hd file for a 2 hour movie? I know on dvds the ac3 files are a mere fraction of the overall video size. Is the same true for high def audio versus video? I mean I figure the high def audio would be considerably larger than standard 5.1 ac3 or dts audio.

[redwudz]

Just off the top of my head, but if I remember correctly, the AC3 in a Blu-ray video is at 640Kbs rate, so it's bigger than the usual 256Kbps AC3 audio. Probably twice the size, anyway.

There is some useful info on that in 'WHAT IS' Blu-ray to the upper left on this page.

Muxing is fairly fast, maybe a half hour. I'm at a disadvantage at present as I haven't processed any BD files in a few days, so I am just guessing.

[yoda313]

@redwudz - thanks for the info.

I'm currently re-opening the ripped hd-dvd. I will be reencoding it tonight.

My goal is to preserve the audio. Hopefully that will do the trick.

Actually dvd ac3 is almost uniformally 384kpbs for dolby digital. The bigger movies like Star Wars and Lord of the Rings and such use 448kpbs. So at least in that it won't be QUITE as much a jump up from standard ac3. But like I said I'd rather notch down the video quality a tad and preserve the 5.1 then lose the 5.1 and have a few tenths of a percent better compressed video.

I'll report back tomorrow night with the results. (assuming I'm not doing anytihig out of the ordinary for new years eve - which I'm not currently - though I might be playing some online games - who knows.....).

EDIT - well I have some bad news to report - there is no X-COPY option in audio for ripbot264 in the mp4 conversion screen. I have decided to go ahead and convert the video only. I targeted it to under 8gigs so I can have enough room to add audio upon muxing. (hopefully).

I will have to mux in the audio with the mp4 after the fact. Is tsmuxer the tool for that and preserve the video?

EDIT 2 - some good news at least - this time instead of doing cq 18 I am doing 2 pass encoding to custom 1280x720p with no cropping. I know have a 6 hour estimate. It ended up being about 14 hours Sunday noonish to middle of the night for the cq 18 conversion (same movie of course). I should be able to complete this test tomorrow after work. I will check in on the video in the morning before I go to work. It hopefully will look as good as the cq 18 video - though I do realize it will be 3/4 the size of the cq 18 file - that was 12gigs and this will be under 8gigs so I know it won't look "exactly" the same. I 'm just hoping for decent 720p video quality. - I will then have to demux the audio and remux it into the mp4 video file. Here's hoping no synch issues!

[boxrick]

I have been attempting this myself... I have a .TS file containing a Dolby TRUE HD core file, and an uncompressed 1080p blu ray rip.
However im trying to compress the video into something more usable ( 8-10GB ) Whilst retaining the original Audio file.... and put it into an MKV container.

Selecting X-Stream Copy in rip bot just converts it to AC3 ( Dolby Digital ) .... so where am i going wrong... or can i use a different program?

[poisondeathray]

TrueHD isn't supported by .mkv container

You can manually add the TrueHD stream with tsmuxer (newest beta versions support this), into .m2ts container

[boxrick]

Is it possible to reencode a .TS file into a lesser quality (encoded) version then? Or even possibly still using MKV but with high bitrate DTS ?

This is for playback on my Popcornhour A110... so container does not matter too much, i just wish to compress the picture a little and retain maximum audio quality....

[poisondeathray]

I'm assuming you are still talking about audio - yes it's possible, but you need surcode for dts + eac3to

Unfortunately, surcode is not free. I don't know of a free dts encoder

avc/h.264 + dts works no problem in .mkv using mkvtoolnix

For .ts and .m2ts, the dts output from surcode is not recognized by tsmuxer (but you can wrap it into mkv (renamed from .mka extension), then tsmuxer will accept the dts.