Hi again,
I've looked high and low for a tool that'll convert my MP4 to an AVI, while retaining the 6-channel audio. Since I keep running into dead-ends in that regard, I thought I'd try to simply extract the MP4's audio. Unfortunately the tools that claim to rip MP4 audio all seem to convert to Stereo at the most. I know that this file contains 6 channels, so it's not as if the problem is that there are only 2 channels in the MP4, forcing these converters to only support Stereo.
If anyone knows of how to rip the 6 channels from this MP4, please let me know. Better yet, if you know how to convert the MP4 to an AVI, while keeping the 5.1 in tact, even better.
Thanks again,
Justin
Try StreamFab Downloader and download from Netflix, Amazon, Youtube! Or Try DVDFab and copy Blu-rays! or rip iTunes movies!
+ Reply to Thread
Results 1 to 16 of 16
Thread
-
-
Hi,
Okay, YAMB successfully extracted to a 6-channel AAC, so that step is done. Now, did you mean that Avidemux can take that AAC and re-encode it to an AC-3? I have a feeling that's probably not what you meant, as Avidemux said it couldn't open the file. At this point, I'd just like to have the AAC converted to AC-3. I'm sorry if I'm missing something. I appreciate your help.
Thanks again,
Justin -
What are you trying to do?
What format is your input file (use mediainfo)?
What format do you want your output file to be (for video, audio & container)
avidemux can convert your mp4 to xvid/6-ch ac3/avi in 1 step (you mentioned it would be "even better" )
if you want ONLY the audio, use an audio program like audacity , eac3to or foobar2000 on the demuxed aac (you can even skip the yamb step and save the converted AC3 audio directly from avidemux from the mp4 file)Last edited by poisondeathray; 10th Sep 2010 at 20:28.
-
mpeg-4 can mean about 20 different things
AVI is just a container and can hold more than 20 different things
You need to be more specific. Better yet, use mediainfo view=>text copy & paste the information back here
When you say "AVI" you need to list what type of compression e.g. xvid, mjpeg, lagarith etc.... -
The current builds of avidemux seem to have problems with 6-ch aac
Here is what works for sure, and very simple to use: xvid4psp . I'm going to assume you mean xvid/ac3/avi
1) open your video
2) format => avi
3) video encoding => use one of the xvid presets , press the button beside the drop down menu to configure settings (e.g. quantizer or bitrate etc...)
4) audio encoding => use one of the ac3 presets e.g. 384k or 640k
5) press encode!
Cheers -
From MediaInfo:
-
General
Complete name : C:\Users\Justin Szczap\Desktop\anoes3\anoes3.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42
File size : 1.31 GiB
Duration : 1h 32mn
Overall bit rate : 2 035 Kbps
Encoded date : UTC 2009-04-10 13:23:31
Tagged date : UTC 2009-04-10 14:48:49
Writing application : HandBrake 0.9.3 2008112300
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1h 32mn
Bit rate mode : Variable
Bit rate : 1 519 Kbps
Width : 720 pixels
Height : 384 pixels
Display aspect ratio : 1.875
Frame rate mode : Variable
Frame rate : 25.000 fps
Minimum frame rate : 8.333 fps
Maximum frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.220
Stream size : 1 005 MiB (75%)
Writing library : x264 core 65
Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x1:0x111 / me=umh / subme=6 / psy_rd=1.0:0.0 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=0 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=6 / nr=0 / decimate=1 / mbaff=0 / bframes=0 / keyint=250 / keyint_min=25 / scenecut=40(pre) / rc=2pass / bitrate=1519 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Language : English
Encoded date : UTC 2009-04-10 13:23:31
Tagged date : UTC 2009-04-10 14:48:49
Color primaries : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M
Transfer characteristics : BT.709-5, BT.1361
Matrix coefficients : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M
Audio #1
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : 40
Duration : 1h 32mn
Bit rate mode : Variable
Bit rate : 128 Kbps
Maximum bit rate : 160 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Stream size : 84.7 MiB (6%)
Encoded date : UTC 2009-04-10 13:23:31
Tagged date : UTC 2009-04-10 14:48:47
Audio #2
ID : 3
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : 40
Duration : 1h 32mn
Bit rate mode : Variable
Bit rate : 384 Kbps
Maximum bit rate : 481 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Stream size : 254 MiB (19%)
Encoded date : UTC 2009-04-10 13:23:31
Tagged date : UTC 2009-04-10 14:48:48
-
I'll try out XViD4PSP in a few. I just thought I'd reply with this info first -
Frame rate mode : Variable
Frame rate : 25.000 fps
Minimum frame rate : 8.333 fps
Maximum frame rate : 25.000 fps
I think xvid4psp's default conversion attempts to "fix" it by using a simple avisynth script , but just to give you a heads up warning -
Sorry for the delay in response.
I tried the version of xvid4psp that's linked here and it resulted in an error, warning me that my RAM, files or I forget might be corrupt. I then learned that the version linked here is pretty old, so I downloaded the latest. I left it running overnight and when I went to check the finished file today, the AVI was in 2.0. I know that from the log I posted, you can see that the MP4 contains both a 2.0 and the 5.1 stream. Unfortunately, I don't know how to specify that I want to 5.1 stream. I'm going to try running it again and take specific notes to report back to you on. It's not much help to you for me to post "general" errors. -
Before I go further, here are some screenshots I took, just to show what steps I've been taking and such. Here's the Gspot info on the file, before even attempting to do anything with it:
[Attachment 3442 - Click to enlarge]
Basically the same, but from within XviD4PSP:
[Attachment 3438 - Click to enlarge]
I should've cropped this better. What I was trying to point out are the settings I'm using on the right of the image:
[Attachment 3440 - Click to enlarge]
From within VirtualDub... success! Yes?:
[Attachment 3439 - Click to enlarge]
...or no?:
[Attachment 3441 - Click to enlarge]
Also attached is the MediaInfo report.
So, I basically got all working, other than actually playing the file. That is, from within VirtualDub. Any idea why VDub is reporting this error if it knows enough to display that it's a 5.1? -
not sure, you can try using the 5.x instead of 6.x beta , it seems less buggy
you probably have system filter/codec/splitter issues , from the vdub file information it looks like the program is trying to open the mp4 directly in vdub. If you know how to use avisynth you can write a script to open it in vdub (or xvid4psp) and it should work for sure - the older 5.x versions wrote the script for you, not sure about the 6.x versions
do you have aac enabled in the ffdshow configuration ?
do you have ac3 acm installed ?
do you have an mp4 splitter installed ? -
-
remove the 2-ch audio (remux in yamb , keeping only video + 6-ch audio), then open the mp4 in graphstudio, what does it show?
Similar Threads
-
DTS-HD Master Audio Extraction from Tsmuxer
By m1ke486837 in forum Blu-ray RippingReplies: 0Last Post: 5th Jan 2011, 20:29 -
Mp4, Aac & Wav Extraction
By mahendras in forum Newbie / General discussionsReplies: 2Last Post: 11th Oct 2010, 09:27 -
Audio extraction from DVD using VirtualDubMod
By Ogilvy in forum AudioReplies: 4Last Post: 29th Mar 2010, 16:56 -
MP4 Audio Extraction
By neumannu47 in forum Video ConversionReplies: 2Last Post: 28th Aug 2008, 20:17 -
5.1 audio channel extraction
By efiste2 in forum AudioReplies: 3Last Post: 15th Sep 2007, 05:05