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#1 MP4
Posted: Fri Oct 23, 2015 3:43 pm
by acorn
I have compared MP4 to wave and I must say it seems much cleaner, does MP4 use AAC or something else for the audio tracks, could some one explain why it should sound better ?
Acorn
#2 Re: MP4
Posted: Fri Oct 23, 2015 8:32 pm
by Mike H
MP4 is an encapsulation, so could almost be anything in it, but according to my VLCplayer converter profiles:
Profile: "Video - H.264 + MP3 (MP4)"
In the Edit window:
Video Codec: "H-264"
bitrate: "not used"
Quality: "not used"
Frame Rate: "same as source"
Audio Codec: "MPEG Audio"
bitrate: "128 kb/s"
Channels: "2" (stereo)
Sample Rate: "44100 Hz"
So by default it's mp3.
Looking at actual mp4 files there's slight variation in bitrate value, otherwise the same.
#3 Re: MP4
Posted: Fri Oct 23, 2015 10:09 pm
by The Stratmangler
#4 Re: MP4
Posted: Sat Oct 24, 2015 12:10 am
by Mike H
Clear as mud!
Whatever, it's compressed.
#5 Re: MP4
Posted: Sat Oct 24, 2015 12:49 am
by The Stratmangler
Mike H wrote:Clear as mud!
Whatever, it's compressed.
Sometimes losslessly - ALAC is MP4
Sometimes lossily - AAC can be MP4
#6 Re: MP4
Posted: Sat Oct 24, 2015 12:10 pm
by pre65
I always thought MP4 was for video.
#7 Re: MP4
Posted: Sat Oct 24, 2015 1:20 pm
by The Stratmangler
pre65 wrote:I always thought MP4 was for video.
It is.
It's a general format container - you can encapsulate whatever you want into it
#8 Re: MP4
Posted: Sat Oct 24, 2015 5:44 pm
by Mike H
So re the original question, depends what format is actually in it. Need to look at the file properties?