Originally posted by Shiki Hiya, I'm new here. I was wondering which encoder and what settings I should use to create a MPEG-4 compliant AAC that I can mux with my video to be able to play on (future) standalone players?
Will there be much difference if I transcode a DVD AC3 file into AAC? What should I do to minimise the quality loss? Can AAC do 5.1 channel sound?
Originally posted by Shiki Can MPEG-4 video files use AC3 btw?
Let's remember MP4 is a container format. So, pretty much everything can be added - provided you have the decoding filter. Even Cinepak with VQF
Originally posted by macdaddy Does this mean that XviD/.ac3 will be supported by the ISO/standalone players?
I don't think so, because AC3 is not part of MPEG4 standard. And I don't hope so because AAC is better than AC3.
Originally posted by macdaddy Up to this point, I thought that leavng .ac3 audio alone was the way to go.
Originally posted by macdaddy How so? I hope you know me well enough to know I am not being antagonistic, merely inquisitive. rjamorim, you seem to be a big proponent of the .aac format, and I am curious as to the specific reasons why. Thanks for the indulgence...
Up to this point, I thought that leavng .ac3 audio alone was the way to go. Does ISO MPEG-4 have a specified audio format, like SVCD(mpeg-2) format has .mp2?
Does MPEG-4 only apply to the video? If it applies to audio (and .ac3 is out, and .aac is in) what about the .mpc and .ogg audio formats? When products (like sigma's xcard) say MPEG-4 compliant, is there only one audio/video format that works, or are these products simply processing the video (the MPEG-4 part) and passing through the audio to the soundcard?
I apologize for my ignorance; thanks for any input.
Originally posted by Tes I think rjamorim was referring to AAC as being better than AC3 when encoding from the same source material, not in terms of transcoding. But I have never made a direct comparison between AC3 and AAC so I also await rjamorim's response