Dear Developers,
I am currently involved in the co-ordination of archiving a whole heap
of tapes containing audio (4000+ sermons for www.newcreation.org.au) to
digital format.
At present, all the tapes have been converted into mp3 @ CBR 40kbs,
44100 Hz... And this appears to play in most portable players capable of
playing mp3's. (ogg vorbis isn't that widely supported, and many
portable players don't like frequencies other than 44100 Hz, or bitrates
lower than 40 kbs)
I am interested in converting these mp3's into spex format to reduce the
file size so that these tapes can be downloaded much more easilier over
the internet. For the how-to's for the users, I am primarily interested
encouraging users to use Winamp for windows, and XMMS for linux... (I
don't know what to recomment for Macintosh)
On of the primary concerns is that I am able to edit the title, author,
album, and comment information for the file. The manual states that
"/Speex bit-streams can be stored in Ogg files./" Thus I assume that
it
is possible to encode speex as either ".spx" or ".ogg"
At the moment, I am assuming that there are many tag editors for the ogg
format, and none for the .spx format. A quick look at the hexdump of a
.spx file starts with:
[pmdumuid@Andottie speex-xmms]$ hexdump -C ~/male.spx | more
00000000 4f 67 67 53 00 02 00 00 00 00 00 00 00 00 c6 f2
|OggS............|
00000010 89 01 00 00 00 00 28 db bf 85 01 50 53 70 65 65
|......(....PSpee|
00000020 78 20 20 20 31 2e 30 2e 33 00 00 00 00 00 00 00 |x
1.0.3.......|
00000030 00 00 00 00 00 00 00 00 01 00 00 00 50 00 00 00
|............P...|
00000040 40 1f 00 00 00 00 00 00 04 00 00 00 01 00 00 00
|@...............|
00000050 ff ff ff ff a0 00 00 00 00 00 00 00 01 00 00 00
|................|
00000060 00 00 00 00 00 00 00 00 00 00 00 00 4f 67 67 53
|............OggS|
00000070 00 00 00 00 00 00 00 00 00 00 c6 f2 89 01 01 00
|................|
00000080 00 00 85 a7 12 f5 01 35 18 00 00 00 45 6e 63 6f
|.......5....Enco|
00000090 64 65 64 20 77 69 74 68 20 53 70 65 65 78 20 31 |ded with
Speex 1|
000000a0 2e 30 2e 33 01 00 00 00 11 00 00 00 74 69 74 6c
|.0.3........titl|
000000b0 65 3d 68 65 6c 6c 6f 20 74 68 65 72 65 4f 67 67 |e=hello
thereOgg|
000000c0 53 00 00 80 43 00 00 00 00 00 00 c6 f2 89 01 02
|S...C...........|
000000d0 00 00 00 a6 b2 6b 09 6c 26 26 26 26 26 26 26 26
|.....k.l&&&&&&&&|
000000e0 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26 26
|&&&&&&&&&&&&&&&&|
*
00000140 26 26 26 26 2d dd 10 17 a4 00 00 ff ff ff ff ff
|&&&&-...........|
With seeing the "OggS" and "Speex" strings, I get the
feeling .spx files
may just be .ogg files. Is this the case? If this is the case then
maybe the sentence in the manual should be rewritten as: /"Speex
bit-streams *ARE* be stored in Ogg files."/
Anyhow, my questions are:
* How do I encode speex as ogg files, and if I do:
* Do the spex plugins work with both .spx files and .ogg files, or
is a special .ogg plugin required that includes a speex decoder?
At the moment it appears I may be able to rename the spx files to .ogg,
then edit the tags using a standard ogg tag editor, then rename the
files back to .spx. Is this O.K??
Regards,
Pierre Dumuid
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://westfish.xiph.org/pipermail/speex-dev/attachments/20040625/b51d01ce/attachment.html
