大家都知道,很多播放器都会在mp3或wma的音乐的末尾加上自己的信息,请问如何知道这些信息是从mp3或wma文件的哪个字节开始啊?
解决方案 »
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at end of file - 128 bytesoffset type len name
--------------------------------------------
0 char 3 "TAG"
3 char 30 title
33 char 30 artist
63 char 30 album
93 char 4 year
97 char 30 comments
127 byte 1 genre
--------------------------------------------- genre : 0 "Blues"
1 "Classic Rock"
2 "Country"
3 "Dance"
4 "Disco"
5 "Funk"
6 "Grunge"
7 "Hip-Hop"
8 "Jazz"
9 "Metal"
10 "New Age"
11 "Oldies"
12 "Other"
13 "Pop"
14 "R&B"
15 "Rap"
16 "Reggae"
17 "Rock"
18 "Techno"
19 "Industrial"
20 "Alternative"
21 "Ska"
22 "Death Metal"
23 "Pranks"
24 "Soundtrack"
25 "Euro-Techno"
26 "Ambient"
27 "Trip-Hop"
28 "Vocal"
29 "Jazz+Funk"
30 "Fusion"
31 "Trance"
32 "Classical"
33 "Instrumental"
34 "Acid"
35 "House"
36 "Game"
37 "Sound Clip"
38 "Gospel"
39 "Noise"
40 "AlternRock"
41 "Bass"
42 "Soul"
43 "Punk"
44 "Space"
45 "Meditative"
46 "Instrumental Pop"
47 "Instrumental Rock"
48 "Ethnic"
49 "Gothic"
50 "Darkwave"
51 "Techno-Industrial"
52 "Electronic"
53 "Pop-Folk"
54 "Eurodance"
55 "Dream"
56 "Southern Rock"
57 "Comedy"
58 "Cult"
59 "Gangsta"
60 "Top 40"
61 "Christian Rap"
62 "Pop/Funk"
63 "Jungle"
64 "Native American"
65 "Cabaret"
66 "New Wave"
67 "Psychadelic"
68 "Rave"
69 "Showtunes"
70 "Trailer"
71 "Lo-Fi"
72 "Tribal"
73 "Acid Punk"
74 "Acid Jazz"
75 "Polka"
76 "Retro"
77 "Musical"
78 "Rock & Roll"
79 "Hard Rock"
80 "Unknown"- frame length :. mpeg1.0layer1 :
(48000*bitrate)/sampling_freq + padding
layer2&3:
(144000*bitrate)/sampling_freq + padding. mpeg2.0layer1 :
(24000*bitrate)/sampling_freq + padding
layer2&3 :
(72000*bitrate)/sampling_freq + padding
(48000*bitrate)/sampling_freq + padding
layer2&3:
(144000*bitrate)/sampling_freq + padding. mpeg2.0layer1 :
(24000*bitrate)/sampling_freq + padding
layer2&3 :
(72000*bitrate)/sampling_freq + padding
上面的又是什么意思啊,请说清楚点好吗,谢谢?
- frame length 是mp3文件中每一段的长度,整个文件就是由许多段组成的,每一段都有相同的段头。这些我只是多说了点,与你的问题没有直接联系。你可不比理会。