Topic: checksum before or after encoded to flac?

[deadheadcorey]

which is preferred?

[twatts (pants are so over-rated...)]

I do both - create a WAV MD5 and a FLAC FFP.

Terry

[deadheadcorey]

which is liked better on the live music archive?

[newplanet7]

One stop shop In Traders Little Helper.
It asks before encoding if you want and md5 or ffp.

[greenone]

LMA will create an md5 and ffp for you if you upload files without checksums. It will not create a wav md5 file for you.

[kirk97132]

One stop shop In Traders Little Helper.
It asks before encoding if you want and md5 or ffp.

But I thought that was for  AFTER processing is done?

[newplanet7]

One stop shop In Traders Little Helper.
It asks before encoding if you want and md5 or ffp.

But I thought that was for  AFTER processing is done?

It has a drop down menu that you select an ffp/md5 from.
I click it before it encodes and when it finishes encoding it creates it.
You do however select it before it encodes. At least I do.

[georgeh]

Is this assuming you have already done a fix sbe's on the original wave? then flac. i too use traders little helper, flac fronted keep crashing for some reason and i never went back to it.
track> fix sbe's,> flac> check sum md5 >  finger print
i believe is the order i do

[hoppedup]

I always tag my flacs. Once, I mistakenly tagged them after doing the checksums and I got an 'MD5 failure' message when attempting to upload to LMA. So checksum is now the last thing I do.

[JasonSobel]

I always tag my flacs. Once, I mistakenly tagged them after doing the checksums and I got an 'MD5 failure' message when attempting to upload to LMA. So checksum is now the last thing I do.

yes, md5's will change if you change the metadata (tags) on the files.  FLAC fingerprints (FFP), however, will stay the same regardless of metadata changes, because only the audio portion of the file is used to create FFP's.

[jbell]

I usually fix sbe's when using TLH to create flacs.  Is there another way to do this?

Is this assuming you have already done a fix sbe's on the original wave? then flac. i too use traders little helper, flac fronted keep crashing for some reason and i never went back to it.
track> fix sbe's,> flac> check sum md5 >  finger print
i believe is the order i do

[JasonSobel]

I usually fix sbe's when using TLH to create flacs.  Is there another way to do this?

Is this assuming you have already done a fix sbe's on the original wave? then flac. i too use traders little helper, flac fronted keep crashing for some reason and i never went back to it.
track> fix sbe's,> flac> check sum md5 >  finger print
i believe is the order i do

Using TLH, there are two ways to fix SBE's...

Format
 \- Encode WAV file
and then make sure the "Align on Sector Boundaries" box is checked.

or

Tools
\- Fix SBE's
and that will allow you to fix SBE's before encoding to FLAC



personally, I always fix SBE's first, then create WAV md5's.  then encode to FLAC, and create my FFP.
If I fixed the SBE's on the same step as encoding to FLAC, than I wouldn't be able to create WAV md5's before encoding (because the files are changing with the SBE fixes).  In that case, I would have to decode back to WAV after encoding to FLAC just to create WAV md5's.  That seems to me like a big extra step, so I fix the SBE's (if needed) first.

[jbell]

Thanks

I usually fix sbe's when using TLH to create flacs.  Is there another way to do this?

Is this assuming you have already done a fix sbe's on the original wave? then flac. i too use traders little helper, flac fronted keep crashing for some reason and i never went back to it.
track> fix sbe's,> flac> check sum md5 >  finger print
i believe is the order i do

Using TLH, there are two ways to fix SBE's...

Format
 \- Encode WAV file
and then make sure the "Align on Sector Boundaries" box is checked.

or

Tools
\- Fix SBE's
and that will allow you to fix SBE's before encoding to FLAC



personally, I always fix SBE's first, then create WAV md5's.  then encode to FLAC, and create my FFP.
If I fixed the SBE's on the same step as encoding to FLAC, than I wouldn't be able to create WAV md5's before encoding (because the files are changing with the SBE fixes).  In that case, I would have to decode back to WAV after encoding to FLAC just to create WAV md5's.  That seems to me like a big extra step, so I fix the SBE's (if needed) first.

[scb]

I usually fix sbe's when using TLH to create flacs.  Is there another way to do this?

Is this assuming you have already done a fix sbe's on the original wave? then flac. i too use traders little helper, flac fronted keep crashing for some reason and i never went back to it.
track> fix sbe's,> flac> check sum md5 >  finger print
i believe is the order i do

Using TLH, there are two ways to fix SBE's...

Format
 \- Encode WAV file
and then make sure the "Align on Sector Boundaries" box is checked.

or

Tools
\- Fix SBE's
and that will allow you to fix SBE's before encoding to FLAC



personally, I always fix SBE's first, then create WAV md5's.  then encode to FLAC, and create my FFP.
If I fixed the SBE's on the same step as encoding to FLAC, than I wouldn't be able to create WAV md5's before encoding (because the files are changing with the SBE fixes).  In that case, I would have to decode back to WAV after encoding to FLAC just to create WAV md5's.  That seems to me like a big extra step, so I fix the SBE's (if needed) first.

why make wav md5s?  1 problem I see with this is if your wav files have extra data in the header and the conversion to flac removes it.  The decode from flac to wav would create a wav file with identical audio data, but the headers wouldn't be the same, and your md5s would never match even though the audio was 100% the same

[newplanet7]

^^^
Exactly what I've always noticed.
They never check out after decoding.
I've never understood why until you put it that way.

[JasonSobel]

why make wav md5s?  1 problem I see with this is if your wav files have extra data in the header and the conversion to flac removes it.  The decode from flac to wav would create a wav file with identical audio data, but the headers wouldn't be the same, and your md5s would never match even though the audio was 100% the same

old habit, I guess.  but I do always check to make sure that my WAV headers are "standard" without any extra data, before I make my WAV md5's and then encode to FLAC.  I've tested many of my file sets, and the decoded WAV's always match the original WAV md5.