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Gear / Technical Help => Post-Processing, Computer / Streaming / Internet Devices & Related Activity => Topic started by: deadheadcorey on August 11, 2010, 07:02:17 PM

Title: checksum before or after encoded to flac?
Post by: deadheadcorey on August 11, 2010, 07:02:17 PM
which is preferred?
Title: Re: checksum before or after encoded to flac?
Post by: twatts (pants are so over-rated...) on August 11, 2010, 07:05:19 PM
I do both - create a WAV MD5 and a FLAC FFP.

Terry
Title: Re: checksum before or after encoded to flac?
Post by: deadheadcorey on August 11, 2010, 07:21:08 PM
which is liked better on the live music archive?
Title: Re: checksum before or after encoded to flac?
Post by: newplanet7 on August 11, 2010, 07:37:07 PM
One stop shop In Traders Little Helper.
It asks before encoding if you want and md5 or ffp.
Title: Re: checksum before or after encoded to flac?
Post by: greenone on August 12, 2010, 10:55:48 PM
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.
Title: Re: checksum before or after encoded to flac?
Post by: kirk97132 on August 13, 2010, 10:13:44 AM
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?
Title: Re: checksum before or after encoded to flac?
Post by: newplanet7 on August 13, 2010, 12:31:01 PM
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.
Title: Re: checksum before or after encoded to flac?
Post by: georgeh on August 19, 2010, 12:26:26 PM
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
Title: Re: checksum before or after encoded to flac?
Post by: hoppedup on August 20, 2010, 08:19:04 AM
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.
Title: Re: checksum before or after encoded to flac?
Post by: JasonSobel on August 20, 2010, 11:27:51 AM
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.
Title: Re: checksum before or after encoded to flac?
Post by: jbell on August 21, 2010, 07:05:24 AM
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
Title: Re: checksum before or after encoded to flac?
Post by: JasonSobel on August 21, 2010, 07:15:25 AM
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.
Title: Re: checksum before or after encoded to flac?
Post by: jbell on August 21, 2010, 07:45:36 AM
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.
Title: Re: checksum before or after encoded to flac?
Post by: scb on August 21, 2010, 09:12:55 AM
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
Title: Re: checksum before or after encoded to flac?
Post by: newplanet7 on August 21, 2010, 11:21:09 AM
^^^
Exactly what I've always noticed.
They never check out after decoding.
I've never understood why until you put it that way.
Title: Re: checksum before or after encoded to flac?
Post by: JasonSobel on August 21, 2010, 08:37:42 PM
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.