Distorted audio on mp4 (plays fine in VLC)

Musicvid wrote on 12/11/2019, 11:19 AM

Can you upload a sample to Drive or Dropbox?

j-v wrote on 12/11/2019, 11:35 AM

Probably your thoughts were good and the used audio file is coded with another codec or with setting this program cannot handle direct.

you can find the type of file that is used with MediaInfo and if you share the outcom here maybe someone can help you. See here how to give that Info: https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/

Davian-Dent wrote on 12/11/2019, 12:01 PM

Can you upload a sample to Drive or Dropbox?

not sure how to do that to be honest, the first are about 2gb each (they're tv rips)

Davian-Dent wrote on 12/11/2019, 12:01 PM

Probably your thoughts were good and the used audio file is coded with another codec or with setting this program cannot handle direct.

you can find the type of file that is used with MediaInfo and if you share the outcom here maybe someone can help you. See here how to give that Info: https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/

Davian-Dent wrote on 12/11/2019, 6:00 PM

Thank you for the reply..!
Here's the info from Mediainfo (it's gibberish to me):

General
Complete name : C:\Media\Video\twotw1.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 2.58 GiB
Duration : 55 min 18 s
Overall bit rate : 6 687 kb/s
Writing application : Lavf58.35.101

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 55 min 18 s
Bit rate : 6 298 kb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.121
Stream size : 2.43 GiB (94%)
Writing library : x264 core 158 r2984 3759fcb
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=8 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=18 / lookahead_threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=17.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC

Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Commercial name : Dolby Digital
Codec ID : ac-3
Duration : 55 min 18 s
Bit rate mode : Constant
Bit rate : 384 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Stream size : 152 MiB (6%)
Language : English
Service kind : Complete Main
Default : Yes
Alternate group : 1

j-v wrote on 12/11/2019, 12:24 PM

Thanks for that MediaInfo, nothing wrong with the file and the used audio codec. Normally they play good in VMS 16.
Can you tell which audiodevice on your hardware is used in VMS 16? That you can check and choose here

Davian-Dent wrote on 12/11/2019, 12:31 PM

Thanks for that MediaInfo, nothing wrong with the file and the used audio codec. Normally they play good in VMS 16.
Can you tell which audiodevice on your hardware is used in VMS 16? That you can check and choose here

It was set to Microsoft Soundmapper....

j-v wrote on 12/11/2019, 12:44 PM

Did you also try another one?

Davian-Dent wrote on 12/11/2019, 12:50 PM

Did you also try another one?

yeah I tried all of them. Gutted.
I imported a totally different video and that was fine. It's odd that VLC didn't have an issue. It's especially annoying as I only bought the software this afternoon!
Maybe I should convert it to another format with Handbrake and try again...

j-v wrote on 12/11/2019, 12:54 PM

Can you upload a sample to Drive or Dropbox?

not sure how to do that to be honest, the first are about 2gb each (they're tv rips)

You can use Drive (of Google): https://www.google.com/intl/us_ALL/drive/
or Dropbox : https://www.dropbox.com/ to put the files on and give here the link to such a file.
You can split a mp4 of 2GB into f.i. 1 minute with the free MP4 Splitter of the free prog MP4 joiner : http://www.mp4joiner.org

Davian-Dent wrote on 12/11/2019, 1:09 PM

Can you upload a sample to Drive or Dropbox?

not sure how to do that to be honest, the first are about 2gb each (they're tv rips)

You can use Drive (of Google): https://www.google.com/intl/us_ALL/drive/
or Dropbox : https://www.dropbox.com/ to put the files on and give here the link to such a file.
You can split a mp4 of 2GB into f.i. 1 minute with the free MP4 Splitter of the free prog MP4 joiner : http://www.mp4joiner.org

Aha, thanks!
Try this... https://www.dropbox.com/s/ogc4t9ydbjdej2l/TWOTWsample.mp4?dl=0

Marco. wrote on 12/11/2019, 1:43 PM

AC3 wrapped in MP4 is a no-go for Movie Studio (and Vegas Pro). Best you can do probably is to re-encode such files with a different audio codec.

Davian-Dent wrote on 12/11/2019, 1:46 PM

AC3 wrapped in MP4 is a no-go for Movie Studio (and Vegas Pro). Best you can do probably is to re-encode such files with a different audio codec.

Aha! I see - thank you so much!
I'll run it through Handbrake to use something other than AC3.
Awesome help and support - cheers!

Marco. wrote on 12/11/2019, 1:48 PM

If wrapped in MP4 and video being encodec as AVC, then AAC is a good choice for audio.

Davian-Dent wrote on 12/11/2019, 1:52 PM

If wrapped in MP4 and video being encodec as AVC, then AAC is a good choice for audio.

Brilliant! Thanks.....

j-v wrote on 12/11/2019, 2:31 PM

I also used Handbrake and with that other audio codec the file is good accepted by VMS 16.
Probably now is Vegas also better see the lenght of the audio file because as the original it is longer than the video.
I show you that in my screengrab of my trial with your file. First on the timeline the original and second the file trough Handbrake.

@Marco.
Do you know why that Handbrakefile not can open in VPro 17 and even not shows up in the Vegas Explorer?

Davian-Dent wrote on 12/11/2019, 2:49 PM

nice one - thanks!

Marco. wrote on 12/11/2019, 3:42 PM

"Do you know why that Handbrakefile not can open in VPro 17 and even not shows up in the Vegas Explorer?"

Does that mean this particular HandBrake file works fine in Movie Studio 16 but does not in Vegas Pro?

I've abandoned HandBrake since a while so I can't test. My FFmpeg converted version where I copied the video stream without re-encoding and only transcoded AC3 to AAC works fine in both Movie Studio and Vegas Pro.

j-v wrote on 12/11/2019, 5:03 PM

Does that mean this particular HandBrake file works fine in Movie Studio 16 but does not in Vegas Pro?

Yess and that seems very strange to me, but it is also already a longtime I did not use it myself because for my cams and Screengrabs I don't need it anymore.
I only hold it loaded and updated to maybe help others like the OP.
Maybe it is caused because I let it get the extension m4v in stead of mp4.
I'll try that tomorrow, now I'm going to sleep.😌

Marco. wrote on 12/12/2019, 2:53 AM

M4V is an elementary video stream container.

j-v wrote on 12/12/2019, 3:09 AM

By trying to see differences between VMS 16 and VPro 17, I saw more strange behaviour of, for me, VPro 17. I made from the difference between both a screenvideo and from a strange difference between adding from the explorer or Project Media of the lenght of the audiofile a screengrab. Maybe you can report this to the developpers if needed?

1. Difference between adding from Explorer and Project Media

2. Difference between handling of a m4v file out of Handbrake between VMS 16 and VPro 17

3. Also strange that after this trying in VPro 17 and only starting a new project without first closing and starting the program, repeatedly the program froze with a white screen and had to be closed by the taskmanager.

j-v wrote on 12/12/2019, 3:43 AM

Addition on above.
That was all on my laptop from signature, on my desktop both files can there be added from explorer and from project media. The difference between audio lenght stay different if added from exploere or project media.

Marco. wrote on 12/12/2019, 5:06 AM

I think this whole file is just broken, both wrapper and streams, maybe due to coming from a tv tuner, so the file isn't meant for editing.

j-v wrote on 12/12/2019, 5:27 AM

At least not for my type of editing.😉

Musicvid wrote on 12/12/2019, 6:34 AM

AC3 wrapped in MP4 is a no-go for Movie Studio (and Vegas Pro).

That is the correct answer, afaiac.

VRD reports no broadcast stream errors or resync frames in this too-short-to-tell sample.

M4V is an elementary video stream container.

Apple's name for elementary video stream is AVS, which is rarely seen in the wild.

Changing the extension from M4V to MP4 should allow it to open in all versions of Vegas, as long as the audio is AAC, and unless something else is broken.

M4V is actually just Apple's name for MP4 that has chapter support. It is no longer necessary, but the two are structurally identical; and, for playback, can be used interchangeably today, except in much older iThingies.

M4A is the corresponding audio format, which wraps AAC for iTunes.

As a Handbrake user, just set the Preference to MP4 only. Otherwise, fancy-pants Handbrake automatically changes the extension depending on the presence or absence of chapter marks.

Based on the information given, there is a 99% likelihood that the M4V extension is not registered in VP17.

Sounds like a minor bugfix for Magix.