Avidemux What Are The Best Setting To Clean Up A Dark Video??

[DJboutit]

I shot a few videos at a outdoor music fest at night the videos are a somewhat dark a need to sharpened wit Avidemux what are the best settings to clean up these videos and make them brighter??

[Atticus Draco]

'
after you successfully load the file into the Avidemux program,,
the options/filters available to you (for the loaded file),,
are located in the 'Video Filter Manager'

[DJboutit]

'
after you successfully load the file into the Avidemux program,,
the options/filters available to you (for the loaded file),,
are located in the 'Video Filter Manager'

I know how to do that I am just looking for suggestion on which settings and where they should be

[davexnet]

It's impossible to generalize; post a sample if you want more specific advice.

[Atticus Draco]

'

I know how to do that

that has not been verified!

i suggest that you become adventurous,,
and maybe do a couple 'test' pieces on your own,,
it's pretty self explanatory on what needs to be done

you know,, intellectual curiosity on your part might help

be adventurous,, come back and tell us how you did!

[DJboutit]

Here is one of the videos I have a few more that are pretty much just like this one

https://www.flickr.com/photos/72901411@N06/14207946160/in/photostream

[DJboutit]

Anybody seen the video can you suggest the setting I should be using??

[DB83]

Just play around with brightness and/or contrast and see what pleases you.

But there will not be much you can do with that since you will blow out what little detail you already have.

If you want someone to try this themselves, upload a sample of the original here as an attachment and not something that has probably been re-encoded on that display.

[DJboutit]

Here this the video

[DB83]

I took a quick look at it.

I pushed the contrast right up to the max. That does brighten up the image. Do the same with Brightness and, as expected, it washes out the picture.

But when you brighten the picture, you also brighten the low-light noise so you need to play with noise reduction filters as well.

The 'pros' on here would not use this tool but use avisynth instead. But that has a steep learning curve. Even so, it will, if used correctly, produce better results. 'fraid I can not help you with that.

[LMotlow]

If that sample was shot as AVCHD, it's been deinterlacd and reencoded. Otherwise DB83 is right in that ye olde "brightness" and "contrast" gets pitiful results. You'll need specific and advanced tools to get anything from that low-bitrate video, and can't expect miracles.

Thanks for the sample, but 10 or 15 seconds of video would do. A piece of the unprocessed original would be the only thing anyone could work with.....unless your camera really shoots 1920x1080 progressive at 24fps. But maybe it does.

[DJboutit]

Canon S110 shots 1920X1080 24fps

[LMotlow]

Ah, there ya go. Thanks for correcting me on that. Many cameras like this that I've seen record several video modes, but.....anyway, thanks for the specs.

If look at that video you'll see that it isn't just "dark". It's pretty grim with super-blacks. Capture a frame from the vid and throw it in a gaphics app that lets you mount a histogram, and you'll see the sharp cutoff of dark detail. You ought to be able to eyeball it, actually. There's a point where dark detail just stops dead, even if you brighten it. You can make it lighter gray, but you won't get much detail. What you do get could depend on some masking and contrast filters, or in something like Premiere Pro, Vegas Pro, or AfterEffects you could play with contrast adjustment layers, levels controls, and other fancy stuff. Even with those tricky tools, when you get below black clipping level what you're going to see is noise, pure and simple. You can already see what happens when you raise the common "brightness" control. It just makes super-blacks into super-grays. So it all depends on how deep you want to go into heavy duty processing.

[jagabo]

There's no "best" adjustment. It's a matter of what you want it to look like and what compromises you're willing to make. If you want to bring out dark detail without blowing out brights you want gamma ajustment, not brightness/contrast.

source with incorrect rec.709 interpretation (what most players/editors will use):


source with correct pc.709 interpretation:


after gamma adjustment and increased saturation (to bring out colors in the dark areas):


Of course, you don't have to go that far with the gamma. Or you could go further.


That video was reencoded with x264. Where's the original?

[LMotlow]

Yep. That's what I mean. 1000% improved with the right tools. But I had the same question -- where's the original? Sure looked re-encoded to me.

[jagabo]

But I had the same question -- where's the original? Sure looked re-encoded to me.

It's definitely reencoded. Use MediaInfo and you can see the x264 metadata. He probably wanted a smaller file for upload. But he would be better off uploading a shorter segment of the original.

[DJboutit]

Here is the original version warning it is 1.3gb

http://u7b8ry7e8g.1fichier.com/

http://10shared.com/newfile?n=641284&MVI_0107.MOV

http://weshare.me/760a0437f7e14aab/MVI_0107.MOV

[LMotlow]

We just need 10 or 15 seconds with motion. If you don't know how to losslessly cut a small section with smart-rendering editors or some other means, let us know.

[DJboutit]

Try to download from one of those file host first they give good download speeds

[DB83]

Whatever the download speed 1.3 gig will take some time and it is simply not necessary. And no one will. The request, even from my reply #6 was not for a re-encoded sample.

Surely avidemux, which is what you want to use, can load the original video. Mark 10 to 20 seconds of that. Use Copy for video and audio and mp4 as the format. Then only the container is different. If your original is interlaced, the sample also is.

[DJboutit]

Those 3 file host you will get a min of 1mb download speed file will take about 20min to download

[DB83]

You are missing the point. It is not about download speed - I could get the file from the first host in 13 mins - it is about what you were asked to do.

If you can not do that, you can not expect help.

[Atticus Draco]

Those 3 file host you will get a min of 1mb download speed file will take about 20min to download

that's like 19 and half minutes more than necessary for your situation!
what has it taken you,, over 3 days to fix your 'darkie' dilemma?!?

what are you gonna waste,, 2 more days on this?