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J River Conversion Cache

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NRGman:

--- Quote from: Matias on December 13, 2010, 04:32:48 am ---But even if I did not change my original flac files (Last Date Modified unchanged), it will still convert to MP3 and synch?
That is no good.

It should be:
1) Check if flacs changed
2) If yes, convert to MP3
3) If caching is enabled (for other devices), store in HD
4) Copy files to iPod

That should be the reasonable way of synching.
Why would MC check the changes based on the cached MP3?

--- End quote ---

+1 it would be stupid to do it any other way...

Frobozz:
I would have to think that J River is being smart about what needs to be re-synced or re-converted and tries to avoid unnecessary conversions and file transfers.  I don't know what all the rules are for determining what gets converted or transferred during a sync and what factors would cause a file to get re-transferred even if it is already on the device.  I would suspect that some, but not all, tag changes could trigger a re-conversion and re-transfer even if the actual audio data in the file hasn't changed.  Going just by file modified dates wouldn't be optimal because file modified dates can get updated for changes that shouldn't need to cause a re-sync.

But even with proper smarts it seems that many files end up needing to be re-transferred when I do syncs.  Probably because I'm always updating cover art and fiddling with tags. 

I also like the conversion cache because it ends up creating an MP3 version of my library.  Handy.

And there are times that you may find you need to erase your iPod and start over.  That's happened to me before when the cover art stopped working on the iPod.  Easiest way to fix that is to erase all the music files and re-sync.  The conversions cache is very useful when that happens.

I'm just suggesting that you use the conversion cache feature if you can.  I find it useful and I like it.  Compared to the size of my FLAC library and other media files the size of the conversion cache is minor.

glynor:
It does check for changes, and only rebuilds the cache file if it needs to because the file has changed.  You can also disable this check as part of the sync settings if you want, and then it will not rebuild the cache file even if the source file has changed (which can be convenient in some cases where you know the changes are irrelevant).

Frobozz:
I didn't know you could disable the conversion cache update for changed files.  That could be handy, especially if I want to do a quick sync for a few songs and don't want to risk having the sync take a long time due to other files getting updated.  I'll have to experiment next time I sync the iPod.

There's always features hiding in MC that I don't know about or didn't think of taking advantage of.  I'm doing a lot with MC but still only using a portion of its capabilities.

sunfire7:
I love the cache feature but I would like to have something like automatic cache instead of having to sync to a handheld to build the cache!!

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