-Brading Software Message Board
+--Forum: Mp3/Tag Studio Support and Bug Reports
+---Topic: MP3TS then MP3Gain, or MP3Gain then MP3TS? started by C Man
Posted by: C Man on Aug. 12 2005,04:36
Just wondering if one way is 'better' somehow? Should I tag my files first and then apply MP3Gain to them, or the other way around? According to the MP3Gain website, the gain info is stored in APEv2 tags.
Posted by: noddy on Aug. 12 2005,06:09
Knowing the MP3TS doesn't support APE tags, I'd suggest that you would probably be better off doing MP3TS first, MP3Gain last.... although, having said that, I don't know that there is any data which would be common to both, so in theory, it probably doesn't make any differnce.
Best bet?
Make a duplicate of an albums worth of MP3 files, and try tagging in both directions and see if there's a difference.
Posted by: C Man on Aug. 12 2005,20:40
Follow up: I took a freshly made --alt-preset standard MP3 and made a few copies of it and started tagging & gaining, and gaining & tagging just to see what differences there might be. Any comments are welcome.
The fresh MP3 had 8372 frames, and size was 5,438,846 bytes.
Tagging first, there were now 8373 frames, and file size increased to 5,443,362 bytes. VBR header repair was also needed and applied.
MP3Gain performed, still 8373 frames, file size increased 206 bytes to 5,440,568 bytes. Again VBR header repair was needed and applied, and final file size and frames remained the same.
I then took another copy of the MP3 and tagged first and applied MP3Gain again, but this time only did one VBR header repair at the end after MP3Gaining. Final frames and file size the same.
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Sorry, I'm not sure if all this is even of any value so I'm trying to keep it short.
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I then took another fresh copy and performed both processes again, but MP3Gained first this time. Results were the same as in the first example: After MP3Gain it needed and received VBR header repair, and needed it again after tagging. Finally, I took a fourth copy and MP3Gained and tagged but only did one VBR header repair at the end. Frames and final file size was the same as in the first experiment - 8373 and 5,440,568.
Listening to the files, they all sounded identical. If anyone has any comments about the whole thing please feel free to add them.
Posted by: Magnus Brading on Aug. 13 2005,12:06
Thanks for sharing your findings.
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