Avidemux Forum

I figured out how to make h.265/x.265 mkvs work when you turn them inside out into mp4's for smart TV playback via fat32 formatted USB.

First of all 265 has a different exit loop than 264 so the MP4 always looks like corruption. You have to use a hex editor on the MP4 output file. It depends on the 265 that is used. There are 2 different versions of 265 and I'm not talking about h and x. I'm taking about 10 bit and 12 bit. The MP4 doesn't know how to exit loop. And well, we see garbled corruption instead of cartoons. I did some research. I went to college for computer science programming Soo I know a thing or 2. I figured out that the first exit loop for h.265 10 bit is 160 or five 32's. Computers like even numbers better to run so you should probably make it ten 16's either way the answer for h.265 10 bit is 160. 160 is the first exit loop that exists in math for 10 bit that also matches an 8 bit machine. The other version of h.265 is 12 bit and it's first exit loop is 96. Three 32's or six 16's. You have to edit the outputted MP4 with a hex editor and change the exit loop number accordingly. Cheers!!

If you perform a search (top right corner of the page, "Entire forum" option) for "Video is late by" you will find two links with explanations:

Quote from: eumagga0x2a on January 04, 2024, 07:24:40 AM"video is late by XX ms" warnings .. - This is a feature kindly contributed by szlldm and a purely informational one. Before that, there was no way to detect and especially to quantify loss of sync due to slow decoding / post-processing during playback.

and further on that topic:

Quote from: eumagga0x2a on January 05, 2024, 12:58:49 AMkeep using "DXVA2" (actually, DirectX) video display on Windows whenever possible

I downloaded your file and played it without messades with Adidemux 241212 with Preference -> HW Accel -> all boxes ticked ON.

Latest Avidemux version (portable) as of Juli 2025
You cannot view this attachment.

Problem: Aside from the error message shown in attachment, any output file will have the issue of audio not being in sync with video.

I have not found any workaround for this issue.


Windows version - Norwegian OS user interface
Enhetsnavn ...filter...
Fullt enhetsnavn ...filter...
Prosessor Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz   3.41 GHz
Installert RAM 8,00 GB (7,88 GB brukbar)
Enhets-ID ...filter...
Produkt-ID ...filter...
Systemtype 64-biters operativsystem, x64-basert prosessor
Penn og berøring Ingen penne- og berøringsinndata er tilgjengelige for denne skjermen

Versjon Windows 10 Enterprise
Versjon 22H2
Installert den ?23.?02.?2021
Operativsystembygg 19045.6093
Opplevelse Windows Feature Experience Pack 1000.19062.1000.0

Error message shown in lower left corner after file being loaded and start play/preview
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Compresset 7z file containing a video file that make Avidemux show error
Google drive link

Bonjour,
Quand tu lances avidemux en ligne de commande, tu as un message d'erreur?

Hello. I click to launch the program, but the window closes as soon as it opens. How can I fix this problem? I am using Windows 10. Avidemux 2.8 was working fine until about two weeks ago.

Bonjour. Je clique pour lancer le programme mais la fenêtre se ferme dès qu'elle s'ouvre. Comment résoudre le problème ? Je suis sous Windows 10. Avidemux 2.8 marchait bien jusque qu'il y a 2 semaines environ.

1) Unrelated to the GUI scaling problem you experience, but vastly beneficial for overall experience and stability: please use the latest 2.8.2 "nightly" build rather than the last, meanwhile very outdated 2.8.1 release version.

https://avidemux.org/nightly/vsWin64/

2) Follow the method mentioned in https://avidemux.org/smif/index.php/topic,20617.0.html

Thanks for Avidemux. This tool helps me a lot.

Yesterday, I tried to use Avidemux 2.8.1 on my wife's computer, but that was impossible.
The minimum size of the application window was covering almost the full screen, and
important parts of the UI was below the screen.

She has an ordinary laptop, with Windows 11, screen size 1920*1080.
BUT, in the Windows Display settings, she had a screen zoom set to 150%, rather than the "Windows recommended" setting of 125%.

Dear Avidemux people,

thanks for your great work! Avidemux works fast, is multi-functional and has a very comprehensible GUI.

I like to ask: Is there a possibility to add a filter to Avidemux with AI frame interpolation like in software "REAL Video Enhancer" (RVE)? There, the AI Model RIFE 4.26 does a great job on my AMD Ryzen 5 5500U with integrated GPU. (I know RVE is written in Python in big parts what may be problematic.)

My idea is to use many of your video enhancement filters in direct (lossless) chain together with an AI frame interpolation.

Have a great summer 2025!

The service of providing official cross-compiled nightly builds was a courtesy of the project maintainer as any decision about resuming or not resuming it in the future. Cross-compiling Avidemux is well documented and essentially trivial to not depend on supply of official builds.