Missing Audio from MP4 (from my phone)

jeremyrfoster wrote on 1/1/2012, 9:45 PM
I am in the middle of a trial version of Movie Studio. If I shoot video with my camera phone (HTC Radar 4G) and copy the file to my computer (.mp4), I can play it in Windows Media Player (with audio), but when I drop it on the timeline in Movie Studio, the audio waveform does not render and the clip does not play or render out with audio. I can convert the clip in Windows Movie Maker and then it comes into Movie Studio just fine, but I'd like to eliminate this cumbersome step if possible. Any ideas as to why this doesn't work as I'm expecting? Thanks.

Comments

musicvid10 wrote on 1/1/2012, 9:54 PM
Use MediaInfo (download from SourceForge) and post the complete file details of your phone footage.
jeremyrfoster wrote on 1/7/2012, 1:15 PM
Cool, thanks. Here's the file info:

GENERAL
Complete name : C:\Users\Public\Videos\WP_20120101_200140Z.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 2.43 MiB
Duration : 6s 597ms
Overall bit rate mode : Variable
Overall bit rate : 3 087 Kbps
Encoded date : UTC 2012-01-01 20:01:39
Tagged date : UTC 2012-01-01 20:01:39
Xtra : WM/MediaOriginalBroadcastDateTime

VIDEO
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L3.1
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Muxing mode : Container profile=Baseline@2.2
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 6s 597ms
Bit rate mode : Variable
Bit rate : 3 027 Kbps
Maximum bit rate : 3 465 Kbps
Width : 480 pixels
Height : 640 pixels
Display aspect ratio : 0.750
Frame rate mode : Variable
Frame rate : 30.000 fps
Minimum frame rate : 29.412 fps
Maximum frame rate : 30.303 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.328
Stream size : 2.38 MiB (98%)
Language : English
Encoded date : UTC 2012-01-01 20:01:39
Tagged date : UTC 2012-01-01 20:01:39

AUDIO
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 6s 591ms
Bit rate mode : Variable
Bit rate : 51.4 Kbps
Maximum bit rate : 52.5 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 41.4 KiB (2%)
Language : English
Encoded date : UTC 2012-01-01 20:01:39
Tagged date : UTC 2012-01-01 20:01:39
musicvid10 wrote on 1/7/2012, 5:17 PM
There's no obvious reason for the audio not opening in Vegas.
What version of Movie Studio?
What version of Quicktime?

Can you upload 30 sec. of original phone footage somewhere?
Once we figure out how to mux your audio and video properly, there "may" still be sync issues because your video track is variable frame rate.
jeremyrfoster wrote on 1/7/2012, 9:32 PM
Here's a link to a 30 second video on my SkyDrive. Thanks for the help.
https://skydrive.live.com/redir.aspx?cid=2c2b69c607ad8f2b&resid=2C2B69C607AD8F2B!3146&parid=2C2B69C607AD8F2B!296&authkey=!APGq0dVjhozxryE
jeremyrfoster wrote on 1/7/2012, 9:33 PM
Oh... and I'm using the trial version of Vegas Movie Studio HD 11.0 (Build 37)
Markk655 wrote on 1/7/2012, 9:53 PM
I can confirm that the audio does not get imported properly in VMS 11(build 256). File plays nicely in Nero and in Quicktime 7.7.1. Changing the extension to .mov didn't work either.
musicvid10 wrote on 1/8/2012, 12:05 AM
Sorry, that link doesn't do anything on Firefox and it locks up IE.
Would like to test with QT 7.6.2 installed.
jeremyrfoster wrote on 1/14/2012, 9:34 PM
Sorry, been busy and forgot to check back. Question... what does QT have to do with it? I didn't think this was a QT based codec. Not sure why the link doesn't work. I'll try to get something else figured out.
musicvid10 wrote on 1/14/2012, 10:34 PM
"what does QT have to do with it?"
When it comes to audio in an mp4 file, everything.
But the problem usually only occurs with earlier versions.
If you are able to post a hard link to your file, I would still like to test it.