#795 MP3 file misidentified as h.263 when its extension is incorrect

[coutal]

File misidentified when it does not have the correct extension. this may indicate over-greediness in part of the h.263 file identification.

$ mediainfo aaa.upload
General
Complete name : aaa.upload
Format : H.263
Format version : H.263
File size : 7.42 MiB

Video
Format : H.263
Width : 352 pixels
Height : 288 pixels
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Compression mode : Lossy

$ mediainfo aaa.mp3
General
Complete name : aaa.mp3
Format : MPEG Audio
File size : 7.42 MiB
Duration : 3mn 14s
Overall bit rate mode : Constant
Overall bit rate : 320 Kbps
Writing library : LAME3.98

Audio
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Mode : Joint stereo
Duration : 3mn 14s
Bit rate mode : Constant
Bit rate : 320 Kbps
Channel count : 2 channels
Sampling rate : 44.1 KHz
Compression mode : Lossy
Stream size : 7.42 MiB (100%)
Writing library : LAME3.98

$ cmp aaa.upload aaa.mp3
$