Avidemux Forum

I just installed AvidemuxPortable_2.8.1.paf.exe but cannot find where it was installed on my computer.  I've looked in Program Files, Program Files(x86), Program Data, in my App Data folders and cannot find an Avidemux.exe to run the program.  I had earlier tried installing Avidemux 2.8.1 VC++64bit but it just deleted the version that was on my computer and didn't install any new version.  I was told by and Admin here that the VC++64bit version was incompatible:
     "The last known good official nightly build is cross-compiled (built with MinGW on Linux for 64bit Windows) r241212. Therefore, completely remove the incompatible VC++ build, then install (or unpack) the cross-compiled one."
     Can someone tell me where I can download the most current "Good" version of Avidemux for Windows11 and also where to find the .exe for the "Portable' version I just installed? 

     Thank you.
     

on a couple of occasions I've had containers with multiple video tracks and unfortunately without exception it's defaulted to the one I'm not looking to work with. there's no 'select video track' option somewhere I'm missing is there? I have versions through (a 2024?) 2.8.2

It's really been a while since I've updated avidemux or really checked around here.
Probably because it just worked (works) and frankly I've been using it casually but regularly.
When I started using it, I was mostly using it to trim rather large gaming videos in copy/rewrap mode.
But since then I've been using it more with re-encoding, also utilizing filters like resize/crop and exporting with nvenc. It really became like a universal tool if I wanna quickly cut/compress something and send in a message, or in a chat or social.

I've been sitting on 230514, now recently I've tried 250407, 240128 and 241214. If it wasn't for messages here I didn't even notice first stuff like nvenc/opengl/fdk aac was broken in 2025 releases due to some git/MSVC issues eumagga has mentioned.

Some notes (all about VC++ on Win11/Intel/Nvidia):

• starting from 250101, it correctly selects dark mode in "default" setting (i.e. follows Windows mode)
• the "video is late by ... ms" desync alert in status bar is a nice addition
• I still use OpenGL + HW Accel because DXVA2 display is washed out (gamma shifted) and pixelated (windows hidpi scaling?) on my 4k monitor, and QT is just laggy. I often scale the preview to 1:4 for 4k to make it easier for playback
• unchecked GUI "limit refresh rate" because I like to see timecode update in real time
• I can confirm 241214 is the most recent one with working nvenc/opengl/fdk aac
• Maybe slightly offtopic, I have just recently installed new nvidia drivers (572.83) and both nvenc encoders work fine with 241214 (tho I only tested default VBR mode). The reason I updated was newer FFMPEG I also recently installed wouldn't work with an older 2024 nvidia driver citing old API so I had to. My old ffmpeg batch scripts also still work with newer drivers and new ffmpeg. And I do still have the old 1080 Ti.
• I was definitely grumpy noticing the generation of .idxb files, glad the mentioned solution works for now
• also left a reply here since I felt it was more relevant there

A couple points:

• I was surprised to learn that MP4 has finally updated their spec to allow uncompressed audio (lol, they gave in?). And current FFMPEG actually allows PCM in mp4 output, without -strict or any warnings. The Wikipedia article also shows lpcm/flac/alac as supported in mp4. Can avidemux eventually be updated to allow it too? This is a frequent occasion when dealing with camera files - they recorded uncompressed audio into mp4 for over a decade, and when exporting from avidemux I have to save as .MOV instead
• Will it ever be possible for avidemux to display video according to its rotation flag? i.e. phone videos vertically

Considering you say this is from a VHS footage, I assume the resolution is somewhere in the vicinity of 360p-480p-540p (SD). Unless it's been captured with some smart upscale to 720p-1080p (HD).
The size/length you mentioned lands somewhere at ~14 Mbps which is indeed excessive for SD resolution (and very good for HD).

I dunno who the file is targeted for (a family viewing on like a smart tv/nas or purely preservation), but
if you were going for compression efficiency v quality, I'd definitely consider h265 (HEVC). Either with x265 (software encoder), or Nvidia NVENC (HEVC). The former uses CPU, the latter needs an nvidia gpu (the newer the better).
It's way more efficient than h264 in spatial & temporal compression, i.e. preserving more details at comparable bitrate vs h264, or having similar quality with a lower bitrate. And almost any modern device that came out in last 5+ years should play it fine. Although of course globally h264 is still more compatible and supported, but is older and less efficient.

In regards to x265, there's a lot of settings, you will probably find plenty of guides/posts online about it (you can look up handbrake guides too cuz the settings are very similar).
The default CRF (Constant Rate Factor) setting of 20 is good start to see if you like the result, and you can use two-pass encoding which will take more time but in theory yield better results compression and quality wise.
Or go with average bitrate, I dunno, maybe between 1-3 Mbps? That should be plenty if it is not HD.

I'm not really a connoisseur of fine-tuned encoding parameters, but these just basic starting points.

Quote from: VaultDweller on April 08, 2025, 12:52:41 PMsubtitle data which is embedded graphically in the video but when I try to trim out sections of my video and write it out without re encoding for some reason it cuts the graphical subtitle data out..

Not possible if these are really embedded subtitles - they are an integral part of each frame.

Quote from: johnMk on April 08, 2025, 07:46:16 AMI've been trying to reduce the file size with Avidemux but haven't had any success

What exactly did you try?

I am presently editing some video and want to copy across the subtitle data which is embedded graphically in the video but when I try to trim out sections of my video and write it out without re encoding for some reason it cuts the graphical subtitle data out.. Could this be maybe another situation where you could have a graphical subtitle COPY box as opposed to expecting subtitles to be a separate file - that way they could simply be copied as is from the input stream.

Thanks in advance.

I have an MP4 file that was captured from a family VHS by someone else. The quality is acceptable, but the file size is quite large at 15 GB for a 2.5-hour video.

Dealing with the sound in Audacity has been no issue, and I have a pretty clean track ready to use. However, I've been trying to reduce the file size with Avidemux but haven't had any success.

So, what settings should I use in Avidemux to achieve a quality result similar to the original file while reducing the size to something acceptable for a video of that length?

Thanks in advance!

Quote from: sark on April 04, 2025, 11:22:12 PM

Quote from: guju on April 03, 2025, 10:37:55 PMBeware:
Actual VxKex is reported as malacious (by virustotal and by d/l with FF)!

Caution is certainly recommended, but VxKex loads it's own dll's when executing an application. The nature of how it works is going to create warnings with virustotal etc.
I would never dream of using Win 7 with an online system. As such, I have never encountered any issues with the version of VxKex I have installed.

I can't assess the matter indeep.

However I would never dream installing an application with all these explicte warnings
(and all those issues about "VxKex virus".).