Come in, come in and make yourself comfortable. This may take a while.
Seems I'm at it again, converting blu ray to dvd, this time with the last of the Harry Potter films. Remind me again why it isn't worth $5 more for the version that comes with a dvd when I get to the end of this tale.
So, I need a dvd-video version of my new blu ray, so that my sister can watch it. Starting off with AVStoDVD, I get a wonderful copy of the video stream using HCenc. Really, the quality of the video is quite good going to a DVD-9 size. But the DTS Master HD audio proves to be too much for AVStoDVD. It basically hangs in mid conversion, after giving me a warning message and attempting to convert the audio anyway. I have to shut it down after an hour of futility and only a very small amount done. I had AVStoDVD set to use Aften, but it switched on its own to ffmpeg.
Oh, and by the way, all the original ac3 files on the blu ray are foreign languages, so completely useless for me.
Well, 4hrs of encoding wasn't wasted. I do have the video m2v file. So I start back at the source and demux the HD audio using ClownBD. I also try to convert it to AC3 while doing so. The result is an audio file 20 minutes too short. ??? Wonderful.
Demux again, this time just taking the HD audio out unchanged. Now, how to convert it? Importing the DTS audio and the m2v file into AVStoDVD, it finishes the audio conversion this time, but gives me an even shorter audio stream (in time) than the one from ClownBD!!!!
So, lets try with the core DTS from the original blu ray. Demux with ClownBD and have a normal DTS file. It looks dvd compliant, but isn't! Authoring this with the m2v file gives you a dvd with no sound.
Conversion of the core in Audacity yields several results, none of which are entirely satisfactory. You can get a mono ac3 file that works perfectly...but hardly ideal since you have only one channel. You can convert to pcm wav file (mono or 6 channel), but it is far too large to fit onto a dvd. Conversion to ac3 6 channel gives you a very muffled sound.
Using a gui for Aften to convert the 6 channel wav file or core DTS to ac3 gives you NOISE. Aften seems entirely inadequate for this task.
So, I import the m2v file and core DTS audio into DVDFlick. DVDFlick works quickly to give me a dvd, and lo and behold, the audio is AC3 5.1. Yay. It has lost a bit of volume, but not too bad. But of course, DVDFlick has completely fracked up the aspect ratio of the video even though I set it to let compliant mpeg2 through without reencoding. I now have black bars on all four sides of the video. Crap.
So I demux the fracked up dvd with PGCDemux and get the precious ac3 audio out of there and reauthor using the m2v file and this ac3 file using DVDLab Pro.
Voila! So easy wasn't it?