Kenner

Do you guys compress all of your music? For those who use BetaPlayer, do you compress MPEGS somehow?

psionandy

MP3 is a compressed format.. I use CDex to convert my CDs into MP3 files.

I use Fairuse to convert my DVDs to AVIs that Betaplayer can play

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G M Fude

Yep, the memory hit on listening to WAV files is just too great. I prefer Ogg Vorbis myself, with VBR encoding. I think it sounds better than MP3 for the same bitrate.

But I don't compress MPEGs any further, I find the Xvid compression is small enough with suitably high quality for TCPMP (Betaplayer).

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Howard2k

I used MPEG4 (AAC).

I think the only common uncompressed formats are:
CD Audio (CD-DA)
WAV

There are other lossless but compressed formats like FLAC

Then there are the lossy compressed formats like
MP3
WMA
AAC
OGG
etc.

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Kenner

Saying compressed probably wasn't what I meant to get across. I was trying to see if you guys lower the bitrate to decrease the actual size of the mpeg or wmv file. Do any of you do that?

Howard2k

You mean re-encode it?

I don't. You only want to encode from the source media once.

It's like if you photocopy a photograph there is a reduction in quality right? then if you photocopy that photograph again (at the same resolution) there is further reduction. Photocopy it again at a lower resolution and result is still worse than if you had photocopied the original at the low resolution.

Every time you encode or re-encode you reduce the quality. So if you encode at 128Kb/s and then re-encode at 64Kb/s to save space, the result will be a worse file than if encoded from the original CD at 64Kb/s.

That example is for music. For video the same thing applies. You can re-encode to save space, but you are better to encode at the "final" bit rate from the source.

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Kenner

Ok, so how would you re-encode an mpeg file then?

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Howard2k

MPEG covers a lot of ground. Is it an MPEG video file or an MPEG audio file?

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Kenner

Audio file

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Howard2k

You could use iTunes to re-encode it to a lower bitrate.

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Kenner

Oh duh, of course! I totally forgot iTunes could do that! Thanks for the eye opener.

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Howard2k

No sweat :)

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