From f5b4584d3dc1ec249e85c49c8e69c9cb979c7e73 Mon Sep 17 00:00:00 2001 From: lordmulder Date: Wed, 14 Dec 2011 23:54:49 +0100 Subject: [PATCH] Updated FAQ document. --- doc/FAQ.html | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/doc/FAQ.html b/doc/FAQ.html index ff49567d..6e82b302 100644 --- a/doc/FAQ.html +++ b/doc/FAQ.html @@ -346,12 +346,15 @@ MP4 (MPEG-4 Part 14) container - in almost any case that is exactly what you wan used to indicate "audio-only" MP4 files. Even worse: There are some buggy (hardware) players that will
recognize MP4 audio file only with the "incorrect" .m4a extension, but NOT with the "correct" .mp4 extension.
Of course LameXP will save your MP4 files with the "correct" .mp4 extension. But if you need your MP4 files
-with an .m4a extension for some reason, you can simply rename(!) these files. This isn't more or less
+with an .m4a extension for some reason, you can simply rename(!) these files. Renaming isn't more or less
"incorrect" than saving the files as .m4a directly. After all, an MP4 file remains an MP4 file.

-Having said that, you should NOT rename any .mp4 or .m4a files to .aac, because these are MP4 files and NOT
-"raw" AAC streams. The Nero AAC encoder has NO option to output "raw" AAC streams and usually you don't need
-such streams. Still, if you want to extract the "raw" AAC stream from an MP4 file, you can use MP4Box.

+Warning: While renaming .mp4 files to .m4a (or vice versa) is safe, because both file extensions refer to MP4
+files, you must NOT rename any .mp4/.m4a files to .aac (or the other way around). That's because the '.aac'
+extension is used with "raw" AAC streams (ADTS format), i.e. AAC streams that are explicitly NOT stored in an
+MP4 container! Unfortunately the Nero AAC encoder has NO option to output "raw" AAC streams and usually you
+don't need such streams. Still, if you really want to extract the "raw" AAC stream from an MP4 file, you can
+use MP4Box for that purpose. Please note that YAMB is a great MP4Box GUI created by Kurtnoise.