Unable to hear audio

[streetboi1208]

Hi! New to all this, recently just started shooting with a Canon EOS R and Comica wireless mic.

When I push video out to YouTube or to our network for our employees, I have a number of employees who say they can not hear the audio.
I've called Canon, but they say it's nothing on their end? I am editing the video in iMovie, and there's a clip of a song beforehand. On that clip you can hear the audio, but as soon as the EOS R video comes out you hear no audio.

I've turned around and resent everything to Adobe Premiere, but still no luck. Any idea on what's causing the loss of sound or how fix it?

I've also uploaded the video straight to youtube with no editing and those same users get the same issue.

[DB83]

Can you upload the video to here as an attachment (assuming that you can actually hear the sound)

[streetboi1208]

https://www.youtube.com/watch?v=nKbcdnjC8fE

The above link is the full video that some can hear and some can not. The issue comes in after the intro.

The link below is a sample from one of the those users phones. When the actual footage comes out you hear an attempt for sound but it's pretty garbled.

https://youtu.be/On3sFSdPLe0

[DB83]

Well the clip plays perfectly well with sound on this PC.


I asked for an original since it is known that youtube can cut audio if it detects copyright music.


And the original is also useful to determine if your audio could be in any way not compatable for certain devices. Lack of sound is normally attributable to codec issues.

[streetboi1208]

Link

[streetboi1208]

Sorry, I'm new to this site, let's see if I did this right. This is the specific one on youtube, but I have this one out there as well, and it does not work for those list of users.

https://files.videohelp.com/u/294374/6R5A3491.MP4

[DB83]

??


Select 'Upload files/Manage attachments' from below your reply. Wait for the attachment to finish uploading and then complete your reply.

[streetboi1208]

How about this one?

[davexnet]

I opened the Audio in Sound Forge and converted to one channel mono.
The intro survives, but that's all.

My guess it the rest of the audio is out of phase, it gets converted to mono on the phone and disappears

sorry for jumping in, but when I first heard it played back in Audacity you can hear the somewhat direction-less sound

[streetboi1208]

Can you explain "out of phase" and what you could suggest I do to get it in phase?

[DB83]

Ok. That worked.


I have issues with 4K video but I still heard the sound.


Is it really necessary to create 4K for a simple message ?. I am not suggesting that is the problem but it might be for these users.

[davexnet]

Can you explain "out of phase" and what you could suggest I do to get it in phase?

When I was a Hi-Fi geek more than 30 years ago, you could get this effect by reversing the wiring of one of the loud speakers.
When you play a mono record and brought the speakers close together facing each other, the music disappeared.
One speaker is exhaling while the other is inhaling, cancelling each other out.

In the digital signal, one channel is inverted versus the other so you get a similar result.

Why it got like that in the first place, I don't know but I'd say go back to the original file created from the microphone
and start there. I can upload a fixed audio if necessary

[streetboi1208]

it's not necessary. I ran through different settings to test and they all came back the same

Here are some lower quality test that I did and with those users it still did not work. This issue is on the PC and on phones.

[streetboi1208]

Here are two more similar files.

[streetboi1208]

Do you think it has anything to do with the microphone I'm using? I'm using Comica Wireless lavalier microphone CVM-WM300A UHF 96 Channel https://www.amazon.com/gp/product/B075FM4ZYM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

The main difference is I'm using their 3.5mm audio cable instead of the 3.5mm - XLR I used to use.

[davexnet]

Here's the fixed audio from the original mp4 upload, and an image showing the remapped channels (from Sound Forge)

[DB83]

Well, as before, all those videos play fine.


I am no audiophile and davexnet may well be correct in his analysis. The only thing I noticed that is out of the norm for the audio is that it is encoded at 48 kHz rather than a more typical 44.1 kHz. Maybe you should try one of those at your workers.

[davexnet]

When I opened audio in Sound Forge (I use this because I'm more used to it and the basic controls, such as channel conversion are simpler to do)
You see the audio and at first glance, it looks OK. But if you do a convert to mono, only the intro and outro wave forms are there,
the center speech is just a flat line.

I copied the speech to a new file, did the channel conversion, and copied it back into the original replacing the bad section

You can use something like Avidemux to mux it back into the video

Here's one of the other files I added the audio back to the video.
You better look through your processing chain carefully to figure out where the audio inversion is happening.

[Cornucopia]

@DB83, 48kHz is the norm for audio attached to video. 44.1kHz is for music-only clips. This is by design (both technically and legally). Historically AudioCDs were 44.1, while all pro and many consumer cams use 48.

Because of sites like YT being lazy, this has gotten all mixed around to where many people don't know which is preferrable.

Scott

[DB83]

Do you think it has anything to do with the microphone I'm using? I'm using Comica Wireless lavalier microphone CVM-WM300A UHF 96 Channel https://www.amazon.com/gp/product/B075FM4ZYM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

The main difference is I'm using their 3.5mm audio cable instead of the 3.5mm - XLR I used to use.

I would guess you would have to use their cable else they could also not give any support. And you might have to ask them if you can not solve this yourself.


Canon would not assist since this is a third-party product.


What I did notice that there is a switchable setting of stereo or mono output. Could that be causing the problem ?