What kind of mp3 is this?

[David1105]

When drag n' drop a mp3 file (File X) into Graphedit, it automatically creates a graph like:

File Async source -> MP4 splitter -> Audio decoder -> Render

For other "normal" mp3 files, their graph generated by Graphedit is:

File Async source -> MPEG-I Stream Splitter -> Audio decoder -> Render

Why two different immediate filter (MP4 splitter or MPEG-I Stream Splitter) are alternatively picked and plugged in the graph?

(Also, before playing back "File X", Windows Media Player gave an error message complaing about its format. However, it still can be played back.)

Thanks!

[smok3]

aac in mp4 container renamed to .mp3? (just guessing :))

[Brother John]

Or really MP3 wrapped in MP4? What does GSpot or MediaInfo say about the file?

[David1105]

Or really MP3 wrapped in MP4? What does GSpot or MediaInfo say about the file?

From MediaInfo:

Format : iTunes
Format/Info : Apple AAC audio with iTunes info
Format/Family : MPEG-4
File size : 3.15 MiB
PlayTime : 3mn 25s
Bit rate : 128 Kbps
StreamSize : 40.0 KiB
Encoded date : UTC 2007-07-28 13:30:34
Tagged date : UTC 2007-07-28 13:30:51

[Kurtnoise]

Clearly not an mp3 file...

[Brother John]

Yep, smok3's guess was correct. It's an AAC file wrapped in MP4. It shouldn't have an .mp3 extension. Better rename it to .mp4 or .m4a