On Tue, Jan 23, 2024 at 11:58 PM Phyllis Smith <[email protected]> wrote: > > For inclusion in the Manual based on Andrew's work is the text below. Let me > know if it needs changes. > Note, that I did not find the following exception. I tested audio at 8K and > 80K with no problem. >> >> ALSO, IMPORTANT! Audio must be 48Khz or 96Khz, nothing else is >> supported, even by ffmpeg's dvd pcm encoder. > > > DVD with LPCM audio (new small section) > > By default, the audio when creating a DVD is always AC3 (Arc Consistency > Algorithm 3). > However you can switch to PCM, Pulse Code Modulator, with just a few > additional steps > as outlined below. > > 0) Start CinGG from a terminal window so you will be able to see what is > happening. > 1) Make sure you have your video with audio loaded and edited in CinGG to > your satisfaction. > 2) Use the File pulldown and select the "DVD Render" option. > 3) In the Create DVD window, accept the defaults or select different values > and then click OK. > 4) When the Batch Render window pops up, in the big box towards the bottom > will be 2 lines > with the first line for Video already highlighted. Instead, click on the > second line so that > it is highlighted. > 5) On the top left, you will see the "File Format" set as AC3. Use the down > arrow next to > the box and change it to "Raw PCM" by clicking on it. > 6) When you switch to Raw PCM, you see the extension in the "Output path" > change to "pcm" > instead of "ac3". Now just reset the extension from "pcm" to "lpcm" as that > is required. > In most cases if you click on the Audio wrench to see the settings, you will > find that the > standard settings of 16 bit Linear / Hi Lo work. If not, experiment for > alternatives. > 7) Now click on the "Start" box in the bottom left hand corner and CinGG will > process what > it can of the job and put you back at your terminal startup window. > 8) You will see a few lines of output, some of which are shown below, and the > ERROR: > > running /dev/shm//dvd_20240116-182336/dvd.sh > INFO: [mplex] mplex version 2.1.0 (2.2.7 $Date: 2012/11/17 01:55:16 $) > **ERROR: [mplex] Unable to open file > /dev/shm/dvd_20240116-182336/dvd.ac3 for reading. > > 8) Change directory to the location as shown on the terminal window of dvd.sh. > 9) Using an editor, modify the line in dvd.sh to change "dvd.ac3" to > "dvd.lpcm" > and change the mplex parameter to include: > > -L 48000:2:16 > > The full line will look like this: > > mplex -f 8 -L 48000:2:16 -o $dir/dvd.mpg $dir/dvd.m2v $dir/dvd.lpcm > > 10) Now the script is ready to run in the same manner it would have had it > been ac3. > That is just run via: ./dvd.sh > 11) Check to make sure there are no errors in the output shown on the window > and proceed > as usual.
I think it also important to remember only 48Khz/16 bit/2 ch will relatively omfortably sit with our default video bitrate. For anything bigger you need to lower video bitrate, as complete stream rate fixed at max 9.8Mbit/s from memory ... Also, how was audio level? You also can change dvdauthor xml part as exist in dvd.sh so it says "pcm" instead of "ac3" - mostly cosmetical due to dvdauthor ignoring empty channel and adding our audio as next stream (1 vs 0) > >> ALSO, IMPORTANT! Audio must be 48Khz or 96Khz, nothing else is >> supported, even by ffmpeg's dvd pcm encoder. -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
