MP3 and MP4 Audio

[anonymez]

Hi all,

I have noticed that the mp4 audio technology has been out for quite some time now, and it provides higher quality at lower bitrates (in comparison to mp3 at least). why then is it not so popular? all movies i see are encoded in mp3 format.
I want to start encoding in mp4, but all this silence about mp4 has made me reluctant.

[bond_d9]

aac (mp4) became popular in the last months, because of the itunes music store, it is not available that long at all

btw you can also put video streams in .mp4

[anonymez]

so if there is nothing wrong with having divx 5.1.1 movies with mp4 audio, can anyone tell me of a way to do this with gordian knot?
I only learned to use it recently (I had been using flaskmpeg for about a year), so i don't want to learn a whole another program.
By the way, i mean to convert from dvd to divx 5.1.1.

Thanks

[bond_d9]

you will have to encode the audio in besweet or aacmachine (aac encoding doesnt work from inside gknot)

[anonymez]

is there any reason why i should NOT encode in mp4 instead of mp3?

[bond_d9]

currently no standalone supports aac audio, but the upcoming chips will do (sigma designs)

[Soulhunter]

Still believe that AAC+MP4 will totally replace MP3 in less than 5 years...

[rhythmace1]

I'll be very unhappy if that is not the case, and much sooner than 5 years too! MP3 is, compared to Ogg or MP4, rubbish. I've done some tests myself with audio files encoded to all 3 formats and found that the MP3 files were of noticeably lower audio quality than the other 2, even when I ramped up the MP3 bitrate so that the file sizes were significantly larger (doubled, even).

MP3 is, quite simply, an outdated technology which (for music files at least) shouldn't be being used anymore (except to play back exisiting files of course). Unfortunately, poor support from hardware and software manufacturers for new technologies like MP4/AAC and Ogg forces us to keep doing so for reasons of compatibility.

[bond_d9]

well people also have to think about how long things like mp3 or dvd needed to become supported "everywhere"
the business is really slow and tries to cash in with existing technologies as long as possible, they dont have an interest that every 2 years a new technology gets widely adopted

still i am sure that mp4/aac will make it and will beat the crappy wma9 format, which already provides lower quality than mp4

[Soulhunter]

Originally posted by rhythmace1
I'll be very unhappy if that is not the case, and much sooner than 5 years too!

Was just a optimistic estimation...

It took a long time to establish MP3 n' ppl are accustomed to it !!!


On the other hand...

The MPEG guys are pushing their MPEG4 A/V standard !!!

I think the "top" hw-producers like Sony, Philips etc. will use MP4 soon...

Dont think they will ever use M$ stuff as a standard, maybe just as a bonus capability !!!


Without the Apple n' Ahead guys, the MPEG4 revolution would take 10 years or even more...

But with them, the MPEG4 stuff will be accepted by the ppl very fast I think !!!


Bye

[anonymez]

but what i really don't get is why you find divx movies with mp3 encoding INSTEAD of mp4... is it because of lack of ecoding tools support? does gordian knot support it?

[bond_d9]

its because the most popular mpeg-4 codecs (divx5 and xvid) use video for windows, which is used in virtualdub, which on its own long time only supported avi

you could also ask why everyone puts mpeg-4 in avi, but noone puts mpeg-2 in avi.
the answer is that as good as no mpeg-2 codec uses vfw and thats good cause vfw is a very outdated technology

[Soulhunter]

Originally posted by ziadost
but what i really don't get is why you find divx movies with mp3 encoding INSTEAD of mp4...

I use always the original AC3 stream for my movie encodes !!!

And I use(d) MP3 for my music backups...

I also encode some of my music to HE-AAC -> MP4 !!!

And if there where more SW support I would also put my movies into MP4...


Still waiting for:

- MP4 capable tools (VirtualDub alike)

- Bugfree n' better mp4UI version

- Some official MP4 splitter (maybe M$)

- Aheads AVC codec


Bye

[bond_d9]

Originally posted by Soulhunter
- MP4 capable tools (VirtualDub alike)

3ivx is working on such a tool atm (of course based on dshow and not crappy vfw)

- Bugfree n' better mp4UI version

we all pray for this

- Aheads AVC codec

yeah, i hope they are able to create something fast

- Some official MP4 splitter (maybe M$ )

ahaha m$ will never ever create a mp4 splitter, mp4 is the biggest competitor to their crappy wm9 formats

btw why do you need an "official" mp4 splitter? i dont know what the 3ivx splitter doesnt handle and its (not only bug) free...

[Soulhunter]

Originally posted by bond_d9
ahaha m$ will never ever create a mp4 splitter, mp4 is the biggest competitor to their crappy wm9 formats

Think about future when MPEG4 is HD-DVD standard (hopefully)...

At this time the MP4 thing will be lucrative for M$ !!!

M$ has to make "some sort" of support for it to earn $$$...

When not, someone else would do it instead !!!

But we all know M$ would never allow this...

Originally posted by bond_d9
btw why do you need an "official" mp4 splitter?

Think about the "spreading MP4 standard" and "make the ppl accept it" thing !!!

Without official support this goal would be even harder to reach...


Bye