sound converter worked for me.
sound converter worked for me.
is there any solution to extract the original aac audio without doing such silly conversions? no, extracting to wav and then encoding the already lossy audio (hint: it won't become lossless just because it's converted to wav) to a lossy/lossless format is not a solution
Last edited by bviktor; December 31st, 2009 at 04:07 AM.
- install with mp4box
- run, editing/click to extract streams
- add input mp4
- select audio track (aac)
- select mp4 output (in raw format you won't be able to seek)
- set output folder to something else than the original mp4
a linux solution would be handy, but i couldn't find one yet. i think it will run with wine but i haven't tested it.
especially this post:
Last edited by bviktor; December 31st, 2009 at 03:47 AM.
I am really shocked, at my desktop I am used to look for applications on Internet or at dealers and then I have to be sure that configuration is appropiated to run the application (a whole mess).
But with Ubuntu is completely different: meanning, easy, fast and every single application is like the OS itself, completely light (no HD or RAM or excessive cache demanding).
I have installed the AudioConverter and have converted some mp4 files on mp3, faster than it takes me to registrate to the Forum in order to comment.
However, I have tried also to convert flv files, without success. If there any "secret" to do it, I would appreciate to know it.
I have read this can be made using Utube ripper, but I just want to know the options, as a new Ubuntu user.
You can use MP4Box to extract the audio or video without the need to re-encode it.
To install MP4Box:
To view the tracks in the mp4:Code:sudo apt-get install gpac
Output:Code:MP4Box -info file.mp4
To extract the audio (in my case Track# 2):Code:* Movie Info * Timescale 600 - Duration 00:03:58.858 Fragmented File no - 2 track(s) File Brand mp42 - version 0 Created: GMT Sat Oct 16 23:46:24 2010 File has root IOD Scene PL 0xff - Graphics PL 0xff - OD PL 0xff Visual PL: AVC/H264 Profile (0x15) Audio PL: AAC Profile @ Level 2 (0x29) No streams included in root OD iTunes Info: Track # 1 Info - TrackID 1 - TimeScale 1000 - Duration 00:03:58.859 Media Info: Language "Undetermined" - Type "vide:avc1" - 5727 samples MPEG-4 Config: Visual Stream - ObjectTypeIndication 0x21 AVC/H264 Video - Visual Size 1280 x 720 - Profile High @ Level 3.1 NAL Unit length bits: 32 Pixel Aspect Ratio 1:1 - Indicated track size 1280 x 720 Self-synchronized Track # 2 Info - TrackID 2 - TimeScale 44100 - Duration 00:03:58.840 Media Info: Language "Undetermined" - Type "soun:mp4a" - 10286 samples MPEG-4 Config:Audio Stream - ObjectTypeIndication 0x40 MPEG-4 Audio AAC LC - 2 Channel(s) - SampleRate 44100 Synchronized on stream 1
Code:MP4Box -raw 2 file.mp4
To extract the actual audio track as-is (no re-encoding),
(1) First find out what format the sound track is in (you need to know this to help choose the correct file extension in step 2):
There should be a line in the output which identifies the audio codec, something like:Code:ffmpeg -i my_video.mp4
Stream #0.0(und): Audio: aac, 44100 Hz, stereo, s16, 125 kb/s
(2) Then to extract the audio:
Thanks to Howard Pritchett for his howto at http://howto-pages.org/ffmpeg/Code:ffmpeg -i my_video.mp4 -vn -acodec copy my_audio.m4a
Don't know about sound converter, there is a very easy to use program called WINFF which is basically ffmpeg with a GUI. It works for me (or you can use ffmpeg on the terminal) I think it does batch conversion as well.
Just wanna bump this from a while ago. Needed to pull aac from mp4s (a lot of them in a recursive way). Sound converter makes quick work of the recursive conversion from aac to mp3, but I really had no reason to convert. AAC was just fine with me.
worked perfectly once i changed it for aac. Thanks, thomas_d_j.ffmpeg -i my_video.mp4 -vn -acodec copy my_audio.m4a