question ????? about flac

if i extract audio from dvd or video to wav then flac is that classed as true flac or not ?????????if not what sort of files are they classed as???
thanks for any help on this matter

If you extract audio from a DVD or video file then it's definitely not lossless! The audio on the DVD or video file is most likely compressed. Only straight copy's from the original recording equipment can be identified as being real lossless audio.

If it is a DVD and the audio is in PCM, go ahead! If it is not a DVD or if it is a DVD but with the audio in Dolby Digital or MPEG, then it won't be considered lossless.

Agreed. It depends on how well the DVD was created in the first place.

What about if you extract flac to wav, and then back to flac again. Is there any loss in quality?

[QUOTE][QUOTENAME]Royal Blue wrote: [/QUOTENAME]What about if you extract flac to wav, and then back to flac again. Is there any loss in quality?[/QUOTE]

Not at all. It's the exact same as zipping, unzipping, and zipping again with WinZip/WinRar. You're just compressing the file... you're not changing its contents at all.

Just indicate it in the details. It's still better to have Dolby Digital to wav and then flac rather than compressing it yet again. The only thing worse than compression is double compression :)

[QUOTE][QUOTENAME]Bubbles! wrote: [/QUOTENAME]Just indicate it in the details. It's still better to have Dolby Digital to wav and then flac rather than compressing it yet again. The only thing worse than compression is double compression :)[/QUOTE]

Dolby Digital is AC3 audio which in itself is lossy.
So on de-compressing an AC3 file > wav ,it will just be a bloated AC3 as you will never get back what was lost from the conversion from wav>AC3(Dolby) ..but it's better than Mp2 for an up side.


So PCM audio is what you want from DVD's.Anything else is deemed as lossy and de-compressing those files ,as with mp3 on your avi files is lossy.

Basically ,you dont make lossless just from changing the .ext.It has to be lossless from the start.

i have just extracted audio from a dvd and this is what i have ended up with does this look right

type:wave sound
bit rate:1536 kbps

i have not done it to flac yet.any help?

Why do you want to rip the audio track from a dvd and share it? That's almost as pointless as demuxing the vob files and sharing the silent video stream without the audio.

[QUOTE][QUOTENAME]928 wrote: [/QUOTENAME][QUOTE][QUOTENAME]Bubbles! wrote: [/QUOTENAME]Just indicate it in the details. It's still better to have Dolby Digital to wav and then flac rather than compressing it yet again. The only thing worse than compression is double compression :)[/QUOTE]

Dolby Digital is AC3 audio which in itself is lossy.
So on de-compressing an AC3 file > wav ,it will just be a bloated AC3 as you will never get back what was lost from the conversion from wav>AC3(Dolby) ..but it's better than Mp2 for an up side.


So PCM audio is what you want from DVD's.Anything else is deemed as lossy and de-compressing those files ,as with mp3 on your avi files is lossy.

Basically ,you dont make lossless just from changing the .ext.It has to be lossless from the start.[/QUOTE]

All I'm saying is it's still better to preserve whatever audio it is in a higher format to avoid any further compression, and indicate where it originates so as not to decieve people.

But a direct demux and posting the .ac3 file would probably make the most sense, however a lot of (downloading) folks wouldn't know what to do with such a file.

I was just trying to say not to turn it into an mp3 after it's been compressed already. If he happens to have some rare audio that was unfortunately saved as Dobly Digital or something, wav/flac is still the best way to share it without losing anymore quality.

Andy,leave the audio from DVD's until you get a little bit more into it.

I say this because audio from a DVD is at a rate of 48.000 and CD's are 44.100.

What you have will not play in a standard CD player but will in a DVD player.
So you may as well of just kept it all together as one...if you get what i'm saying.
Resampling down to 44.100 would mean re-encoding..therefore making it lossy.

Hope that helps you a bit.

"Not at all. It's the exact same as zipping, unzipping, and zipping again with WinZip/WinRar. You're just compressing the file... you're not changing its contents at all."

OK thanks. :)

Now there's a lull in the FLAC attack I'm burning the downloads to disk. I'm backing up the raw data on to DVD for archiving and making audio CD's for my stereo.

I used Nero to create an audio CD and ticked the "No pause between tracks" button. It's also set to "Disk-at-once". I'm still finding I'm getting a mini pause between tracks. Is this the norm? How do I make it seamless ala Wembley '86?

What do other people use to play as audio and archive?

Thanks in advance.

Ste

.ac3 would be the best. but i think that you should see the sample rate first and determine from there.

and the point of having just audio from a dvd is so you can put it on cd and play it in your car...
and it is pointless to have an audioless VOB