Video Editing Question

[gespacho_the_slender]

Just learned something very interesting...

Did a service call with Comcast and found out that if the cable signal drops, the server (on their end) can change the output volume for the signal to the end user. The technician did a reset on my server and told me to unplug my HDMI cable and replug in when I get home. This is intriguing to me on many levels... I didn't realize that HD cable had gotten to that level of complexity. I thought it was a simple single encrypted feed that fed everywhere through the Coax... This changes my mental image of what is going on.

 

[GoGATech]

Just learned something very interesting...

Did a service call with Comcast and found out that if the cable signal drops, the server (on their end) can change the output volume for the signal to the end user. The technician did a reset on my server and told me to unplug my HDMI cable and replug in when I get home. This is intriguing to me on many levels... I didn't realize that HD cable had gotten to that level of complexity. I thought it was a simple single encrypted feed that fed everywhere through the Coax... This changes my mental image of what is going on.

That is interesting. With all the bases you've covered it does seem to be a cable company/cable box issue.

 

[beej67]

I got that via a software bump. My concern with using the software bump is that I am doing this with the audio:

I really just need to go get some sort of secondary training on how to mod video and audio properly... Or figure out why the input signal is low.

Figure out why the input signal is low, but a clean low signal should be fine, just add as much gain as you need. The problem would be if the input signal is so low that any background noise is likewise amplified. Or if the signal simply has a lot of noise.

If you know anything about compressors, you could do that instead of gain. Basically you'd be adding weighted amounts of gain to the louder parts of the signal while ignoring the quieter parts of the signal. I know how to do this in things like Ableton, not sure what you have access to in your platform.

BTW, that's what the technicians did to Trump during the (2nd?) debate. They jacked his mic compressor all the way up, so every sniffle sounded as loud as his words. Very sneaky trick.

 

[gespacho_the_slender]

Figure out why the input signal is low, but a clean low signal should be fine, just add as much gain as you need. The problem would be if the input signal is so low that any background noise is likewise amplified. Or if the signal simply has a lot of noise.

That has been what I've found is the issue on amplified stuff. The white noise is always hard to fully get rid or. I can polish it up with Audacity, but that leaves weird artifacts... chirpy high pitches/punctuation (whenever someone says a "P" word, there is a chirp), stadium recordings sounding a little like they are underwater with strange echoey feeling... It's really hard to explain other than to say, I take a swing at it, but I'm probably doing it wrong.

 

[GoGATech]

That has been what I've found is the issue on amplified stuff. The white noise is always hard to fully get rid or. I can polish it up with Audacity, but that leaves weird artifacts... chirpy high pitches/punctuation (whenever someone says a "P" word, there is a chirp), stadium recordings sounding a little like they are underwater with strange echoey feeling... It's really hard to explain other than to say, I take a swing at it, but I'm probably doing it wrong.

If audacity has a decent gate you may can eliminate some white noise. Underwater/strange echoey sounds like digital clipping to me. I wouldn't think you would be amplifying levels enough to clip but could be. That is all way too much to have to account for though when the problem is the input signal (or how the input signal is being handled by your hardware/application). I think you're on the right track with checking with your cable provider and if that doesn't solve it, I'd request an exchange on my box to eliminate a problem box.

 

[beej67]

Audacity's noise reduction modules are feirce, and will cause that sort of thing if your settings are too severe.

Gates are probably not going to work well on a football broadcast.

Find the noise. It's usually a cable issue. Coax, HDMI, something. Especially if its a hum. Could also be a shitty amp in your cable box.

 

[gespacho_the_slender]

Audacity's noise reduction modules are feirce, and will cause that sort of thing if your settings are too severe.

Gates are probably not going to work well on a football broadcast.

Find the noise. It's usually a cable issue. Coax, HDMI, something. Especially if its a hum. Could also be a ööööty amp in your cable box.

I don't typically have noise issues except for radio broadcasts. The cable is usually clean. I think I _may_ have gotten the issue resolved...
Test 1 - The dulcet tones of Westley Durham and Dave Archer...

Tennessee Game


nm: Darn... Thought I had it... Recording is fine. The raw file is fine. Avidemux seems to drop the volume down in the conversion process. Now to drill down to why Avidemux is dropping volume...

 

[gt2690b]

Vad Lee