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24 bit audio in sound trax

i import several 24 bit wav files that were converted from 24 bit flacs. i than choose export audio file to wav and it only does 16 bit. I am trying to create one file to use to replace and sync a lesser quality audio in a video file. I would like to keep it 24 bit. will video12 even be able to handle 24 bit audio? my goal is to make a bluray out of the concert. i am doing one set at a time. there are 2 sets in the concert, each just over an hour long.
i have nero 12 platinum
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  • don:

    SoundTrax will output 24-bit .WAV files; getting them through Nero 12 Video doesn't look promising to me, but maybe. I tried a quickie Blu-ray with Nero 2014 Video using "Automatic" and got 16 bits.

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  • cool thanks, i see that now. i ended up using traders little helper to convert from flac 24 to wav 24 and shntool to combine them. kept them 24 bit.
    now to deal with the video.
    i replaced and synced the audio and am exporting as a avchd / blu-ray. i have one file about done rendering but it was using 16 bit because i didnt knowhow to get 24 at the time. i am in the experimental stage. gotta live and learn.
    problem with this is the time it takes to render/export. looks like 5 hours for a 90 min video.

    if you or someone can tell me how to keep the 24 bit thru video i would love to know. tried to check metadata but too soon i guess

    thanks again. really appreciate the quick response
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  • don:
    I imported a small 24-bit .wav file into the Nero 12 Video "Video Edit" screen and then tried exporting to a .wav file. The only options were 8 or 16 bits. I also searched the Nero 12 Video .pdf file for the word 'bit' and found nothing! Maybe techsupport@nero.com can help.

    For experimenting, I use a single picture and a short audio clip to make a no menu Blu-ray structure written to my hard drive. It takes just a minute and doesn't use discs.

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  • thanks again. i know i should do smaller samples but even in 16 bit it will be an improvement.
    in the video edit i came across a chapter tool. should one chapter it before exporting? i planned on doing chapters in the bluray authoring feature. is there an advantage to one or the other or does it matter.
    i know dvd can only do 16 bit. why wouldnt it allow 24 bit for bluray?
    again, i appreciate you taking the time to look into this. very cool of you
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  • 24 bit is only used in PCM. As a result, use WaveEditor. In the Options, Audio Options, select Windows PCM. In the Editor Options, set the bit depth to 24 bit. Does that work?

    I guess you could start out in SoundTrax and then go directly to WaveEditor using the Edit option.

    I don't have anything to work with so I can't try it.
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  • wither, glad to get your feedback.
    issue now isnt with creating audio file. issue is with keeping 24 bit in final project-blu-ray. not sure i can.

    another thought about this process(even if i have to use 16 bit audio):
    this may need to be posted seperatly, (have broken middle finger, excuse typing).
    i use video edit set to highest input, add webcast capture flv file, swap video audio for soundboard audio. export to avchd/bluray. output file is 16gb. have another file a bit bigger(2nd set) to put on same bluray. these files combined are only 2.5 gb in original format. The goal is to keep transcoding to a minimum. this process will transcode after the audio sync and than have to reduce the files a bit, transcode again, to write to bluray folders. is this transcoding noticeable? is there a way around one of the transcoding?
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  • I'm not sure which file is 24 bit depth- the flv or soundboard audio.

    If you import it into WaveEditor and make the settings I described, you can use File, Save As and the Windows PCM is an option. It should retain the 24 bit depth.

    I guess you'll have to use your other hand if you get road rage. :)
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  • the sbd is 24 bit.
    i am able to keep the 24 bit until i render the bluray. i did figure out how to avoid the extra transcoding. once i get the new audio synced, i dont export, i choose NEXT and select bluray. this puts me right into the bluray authoring where i create chapters. I edit the video as a whole show. the sbd does not have all the break between sets and time between end of show and encore. so i have to do several splits, delete and join to make it right.
    problem now, besides not being able to keep 24 bit on the bluray folder writing, is the option to split the file in the bluray authoring, so i can create a menu for the 2nd set, is not highlighted. i can not split the file after the first set. usually i can use the scissors(split file) but now it does not work. any ideas. is there another way to add a menu for the 2nd set?
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  • don:

    I see that you've said, "i know dvd can only do 16 bit. why wouldnt it allow 24 bit for bluray? "

    Although I am far from an expert on these things, from what I can find, both DVD-Video and Blu-ray specify 24-bit audio as an option. However, it appears that the Nero Video restricts audio to 16 bits.

    I have also recoded a 24-bit .wav to .wav and .flac. Both of those output files contain 16-bit audio.

    This may be standard practice for authoring tools. Maybe a Nero expert or a knowledgeable forum contributor will comment on that.
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  • another question. whats the dif between dolby digital and lpcm for audio options when writing bluray to harddrive? i have been using DD not lpcm. shouldd i change this. i did a small test and neither one keeps the 24 bit after rendering to br folder.
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  • don:

    Again, I'm not an expert, but I think the main difference is that LPCM does lossless encoding whereas Dolby Digital is "lossy" in that it compresses by discarding "unnecessary" content.
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  • I wonder what would happen to the audio if he disabled SmartEncoding?
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  • well the bluray finished writing to the hard drive. it turned out 1440x1080 and plays as a smaller window even on full screen. trying to write again using pcm for audio and tried to change video setting to force 1920x1080 but the file size went up to 41 gb and it has to reduce quality to fit on bluray. will see what happens. need to experiment with smaller files to figure this out.
    i've done lots of blurays and they always turn out full screen, 1920x1080. however this is the first time bringing in from video edit.

    does it matter what setting i choose when bringing in the video to video edit? i chose full hd even though the flv file is not. the original flv is

    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : Main@L3.1
    Format settings, CABAC : Yes
    Format settings, ReFrames : 2 frames
    Format settings, GOP : M=1, N=120
    Codec ID : 27
    Duration : 3h 26mn
    Bit rate mode : Constant
    Nominal bit rate : 1 200 Kbps
    Width : 848 pixels
    Height : 480 pixels
    Display aspect ratio : 16:9
    Frame rate : 29.970 fps
    Standard : NTSC
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.098

    Audio
    ID : 257 (0x101)
    Menu ID : 1 (0x1)
    Format : AAC
    Format/Info : Advanced Audio Codec
    Format version : Version 4
    Format profile : LC
    Muxing mode : ADTS
    Codec ID : 15
    Duration : 3h 27mn
    Bit rate mode : Variable
    Channel(s) : 2 channels
    Channel positions : Front: L R
    Sampling rate : 48.0 KHz
    Compression mode : Lossy
    Delay relative to video : -2s 21ms
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  • Your video is low resolution. Trying to force it to high resolution will likely result in things like pixelation. In my opinion, when you open Nero Video, you should select Advanced, Video, Custom and set the resolution to the original resolution of the video (848 x 480) for the best results. If you don't want to do that, I suggest selecting HDTV Basic HD.
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  • thanks wither, i appreciate your input. i will try that suggestion. it looks like when i used video edit the video was not filling the whole preview window and when i took the project straight into the bluray authoring it kept the video window that size. i went back and enlarged it and i think that will fix the window size issue. is there a setting to keep it full sized? maybe your suggestion will do that.
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  • To prevent things like pixelation when going from low resolution to high resolution, Nero automatically adds black bars around the video but keeps the aspect ratio the same. That's probably why the picture is small. You can try scaling (or resizing as you said) but then you run into the possibiliy of things like pixelation again. Best you can do is try it.
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  • while i have your attention: like i said i have made many blurays from these type files but have not ran them thru edit video, just put straight into create bluray, chaptered, menued and wrote to hard drive. they turn out great. this pixalization you mention. is that something that might have happened in the process i just described?
    would one expect something different when running thru edit first?
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  • don:
    I did a little experiment:

    1. I made an 848x480 version of the Nero Flower Meadow sample video, 848x480.wmv.

    2a. I created a Blu-ray project and imported 848x480.wmv. It filled the preview screen. I proceeded to burn a no-menu Blu-ray folder. The resolution was 1280x720.

    2b. I created a Full HD movie project and imported 848x480.wmv into the Video Edit screen and placed it on he Video 1 Track. It was a rather small rectangle in the preview window until I scaled it using "Fit to screen". Then, I clicked "Next" and created a Blu-ray project. I proceeded to burn a no-menu Blu-ray folder. The resolution was 1920x1080.

    Both of these Blu-rays were made with the following (default) Blu-ray Recording Format Options.

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  • wow, thank you so much for the effort. that helps. did you happen to notice the output file sizes? curious about the differences. I redid the project with the smaller window. i just dragged the corner to fit the screen. i will look for the option to fit to screen. is that in the video editing part?

    i started another concert. this time i get to the second set, trying to match up the waveforms, after a couple songs the audio waveforms stop lining up and seem to get worse as it continues. could be someting in the stream, missing frames or something? i really dont know. I do know that people in my video group that are able to swap audio in a video are able to stretch or condense the audio track in areas to keep it in sync. they use different software. i really dont want another learning curve and am happy with what i am able to do with Nero.
    is this something I can do in nero? i tried stripping the audio off the webcast and put it in soundtrax and wave editor but did not see how to accomplish this.
    thanks again for all your help

    you too withers, (as always). it really sucks to type with a splint on left middle finger.
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  • don:
    "Dragging the corner" pretty much does the same thing as Fit to screen" - see the image below.

    Re-adjusting the timescale of the audio can be done in WaveEditor using the "Time Correction ..." on the Tools menu. If you want to adjust the overall time, that's easy. If you want to sync it section by section, that's going to be a lot of work since the video is not available for comparison. I don't know if there is a better way.

    Incidentally, the .m2ts file sizes:

    Full HD 1920x1080 59.1 MB
    HDTV Normal 1440x1080 33.2 MB
    HDTV Basic 1280x720 33.1 MB

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