[Vnc2swf-users] Res: edit.py rejects certain mp3

[Luis F. K. <lf...@ya...>]

Well, I think that your file is not encoded in mpeg layer 3, but in layer 1=
.  Swf allows only mpeg layer 3! I know, your file extension is mp3 and it =
probably plays on most mp3 players, but unfortunately it's not mpeg layer 3=
.  =0AI borrowed the following description of mp3 header from http://www.dv=
.co.yu/mpgscript/mpeghdr.htm:=0A=0AHere is "graphical" presentation of the =
header content. Characters =0Afrom A to M are used to indicate different fi=
elds. In the table, you can see =0Adetails about the content of each field.=
 =0A=0A=0A=0AAAAAAAAA AAABBCCD EEEEFFGH IIJJKLMM=0A=0A=0A=0A=0A=0A=0A=0A=0A=
SignLength=0A(bits)Position=0A(bits)Description=0A=0A=0A=0AA11(31-21)Frame =
sync (all bits set)=0A=0A=0A=0AB2(20,19)MPEG Audio version ID=0A          =
=0A00 - MPEG Version 2.5=0A01 - reserved=0A10 - MPEG Version 2 (ISO/IEC 138=
18-3)=0A11 - MPEG Version 1 (ISO/IEC 11172-3)=0ANote: MPEG Version 2.5 is n=
ot official standard. Bit No 20 in frame header =0Ais used to indicate vers=
ion 2.5. Applications that do not support this MPEG version =0Aexpect this =
bit always to be set, meaning that frame sync (A) is twelve bits long, =0An=
ot eleve as stated here. Accordingly, B is one bit long (represents only bi=
t =0ANo 19). I recommend using methodology presented here, since this allow=
s you to =0Adistinguish all three versions and keep full compatibility.=0A=
=0A=0A=0A=0AC2(18,17)=0ALayer description=0A          =0A00 - reserved=0A=
=0A01 - Layer III=0A=0A10 - Layer II=0A=0A11 - Layer I=0A=0A=0A=0AD1(16)=0A=
Protection bit=0A          =0A0 - Protected by CRC (16bit crc follows heade=
r)=0A=0A1 - Not protected=0A=0A=0A=0A=0A----- Mensagem original ----=0ADe: =
Andy Leszczynski <les...@ya...>=0APara: vnc...@li...urce=
forge.net=0AEnviadas: Quinta-feira, 26 de Outubro de 2006 13:11:07=0AAssunt=
o: [Vnc2swf-users] edit.py rejects certain mp3=0A=0AHi,=0AI see following c=
rash:=0A=0A$ python24 edit.py -c -t shape -s 0.75 -a t10_000.swf.mp3 -o abc=
 t10_000.swf=0AUsing pygame 1.7.1release=0AUsing pymedia 1.3.7.0=0AReading =
mp3 file: t10_000.swf.mp3...=0ATraceback (most recent call last):=0A  File =
"edit.py", line 234, in ?=0A    if __name__ =3D=3D "__main__": main(sys.arg=
v[1:])=0A  File "edit.py", line 155, in main=0A    info.reg_mp3blocks(fp)=
=0A  File "d:\src_mirror\pyvnc2swf-0.8.2al\movie.py", line 106, in reg_mp3b=
locks=0A    MP3Reader(self.mp3).read_mp3file(fp, length, nsamples, seeksamp=
les)=0A  File "d:\src_mirror\pyvnc2swf-0.8.2al\mp3.py", line 174, in read_m=
p3file=0A    assert (h & 0x00060000L) =3D=3D 0x00020000L, '!Layer3'=0AAsser=
tionError: !Layer3=0A=0A=0ACloser look reveals that (h & 0x00060000L) is eq=
ual to '0x00060000L', not desired '0x00020000L'.=0A=0AI have to admit I fir=
st time in life see mp3 code so any insight or clue would be desired :-).=
=0A=0A=0AFor the record: my current work around it to lame(unlame(it)).=0A=
=0AThx in advance,=0A-- =0Aalf=0A=0A=0A=0A=0A=0A=0A------------------------=
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