Avidemux Forum

Convert first to uncompressed and then edit and compress back down to your preference.  Yes, the causes 2 generations.  One is uncompressed so the loss is minimal.  Ideally you just ask the client for a better master.  I assume, you are not in such a situation where can ask a client for that.

Trying to edit on compressed video codec is a waste of time.  You might luck out with some edits.  On post-production services, we wouldn't even start without getting or making an uncompressed master.

More detailed preferred codecs:
 https://www.reddit.com/r/VideoEditing/wiki/faq/proxies/

5 years ago, but still with valid info.

Hope that helps.

Quote from: WTWASP on December 04, 2024, 10:29:12 PMthis HEVC cr@p

Please provide a small example of this cr@p, or at least its Mediainfo.

Quote from: WTWASP on December 04, 2024, 10:29:12 PMendcoding option on the left of the Avidemux window

What are these encoding options now?

Quote from: WTWASP on December 04, 2024, 10:29:12 PMI'm leery about upgrading anything anymore

You can use Avidemux in the portable mode, just download new version from https://avidemux.org/nightly/ to a new folder and  rename avidemux.exe to avidemux_portable.exe

I am tearing my hair out...

I hate HEVC. I prefer AVC encoding with bitrates of 2500kbits for video and 224kbits for audio - the bitrates I associate with RARBG encoding. Unfortunately, RARBG encoding for AVC is getting harder and harder to find, because of this stupid HEVC taking over everything. If I obtain an AVC movie file that varies from these parameters - YTS-MX (2250/384), YTS-AM, YIFY, etc, then conversions are pretty smooth and I can modify the files to meet my preferred bitrates for optimum filesizes that allow me to know the duration of a movie based on its file size.

But if it's HEVC? It's a nightmare.
Even finding an oversized MKV (more than 5 GB) is better than dealing with this HEVC crap.

For some stupid reason, no matter what custom settings I use to "decompress" or "uncompress" an HEVC to an AVC, it keeps coming out even SMALLER than before. I could swear I converted a HEVC movie with a duration of just under 2 hrs long (1 hour and 50-some minutes), with the only settings being 2550kbits for video and 224k for audio (if not already 224k by its own default, in which case I select COPY), and it converted satisfactorily.

But now, seemingly "all of a sudden", I'm getting all kinds of stupid outputs. I'm trying to convert a 3h10m HEVC movie with a file size just under 3 GB, to an AVC file with a filesize of 3.65 GB, but it keeps coming out to barely over 2 GB. The same discrepancies are happening with the audio, too.  And on top of this, this particular movie is producing a jittery playback, likely due to a new surprise : reduced framerate - upon checking the new file's properties (in VLC) it is somehow dropping from the standard 23.98 fps to less than 15 fps.

What the hell is going on and how do I get around these issues?  I am confident nothing has been "accidentally" changed or reset in Avidemux. I'm not in the habit of changing anything other than the endcoding option on the left of the Avidemux window. Deeper settings have remained untouched and in their default settings.

Still, I've checked all the options deeper within the program, but it's all in video editing terminology and lingo that is all Greek to me, and there's no way to look up the terms in a glossary or whatever to understand what exactly everything does. Or at least, nothing that summarizes the functions clearly - web searches just give me entire histories with more gobbledy-gook terminology that renders me more confused. 

My Avidemux version is 2·7·1 on 32-bit (because that is the system I have, and using 64-bit is NOT an option). I considered installing a newer (32-bit) version to see if maybe some better options have become available, but I'm leery about upgrading anything anymore, cos new versions tend to remove good features and replace them with useless junk (and/or become Shareware/paid products).

Besides, as I said, it seems like converting HEVC to AVC was working just fine, but now it's "dumbing down" the quality of every conversion no matter what I do.

It's pissing me off cos each conversion takes anywhere from 2-4 hrs, depending on the length of the movie. I cannot do anything else on my PC during a conversion session, cos Avidemux is such a disgusting resource hog and slows everything down to a snail's crawl (is there any way to speed this up without stressing my PC's guts even more than they already are?).

So I am left twiddling my thumbs waiting for one conversion to complete, often wasting an entire day if the output is not what I want and I have to redo it with "minor tweaks" to my custom output settings (i.e. increasing the 2500 video bitrate to 2550 or higher until the final result shows me a bitrate between 2495 and 2500).

This brings up another issue : is there a way to get this damn thing to adhere to the ACTUAL custom settings I choose without dropping a little in the final result? Like, can I force Avidemux to make sure "2500kbps" MEANS 2500kbps, and not 2435kbps or whatever? The audio pulls the same crap - I select 224k and sometimes I get that, but other times it spits out 225 or 227 (or in the case of HEVC, 210).

I know these are a lot of issues for one post, and they are presented in a real dog's breakfast format (all over the place), but I can't even think straight cos I am so tired from staying up all hours trying to get a single conversion to pan out as desired without redoing it a hundred times. These extended conversion sessions are throwing off my entire daily routine/schedule and taxing my sanity.

Help....?

Spend some time now with the nightly (10.11.2024), tried multiple configurations and still see the timeshift of audio when using original recording directly in Avidemux.
The only way to guarantee sync is to have "copy" for audio and video. As soon as I start encoding one of them (or both) AND use the original recording (without VLC re-encode) the shift is there. Can you please provide your py file I would like to test and see what I have configured different/wrong.

In the encoded video I always check the 2 places as mentioned before (3:12, 7:43 - which correspond to original time 11:38, 16:11).

Sorry not yet tried the crashing solution, was playing with audio.

Quote from: Mcstubb on December 04, 2024, 12:47:02 PMIll set the markers at the frame I want to cut

Either cut at I-Frame or re-encode when saving.

So I have been working with combined video files and breaking them apart. Ill set the markers at the frame I want to cut, but it seems Avidemux goes 1.5-2 seconds prior to that marker when saving/exporting that section. Which leads to some awkward files.

Ideas?

Quote from: fishingtested on December 03, 2024, 02:11:39 PMI need help understanding how Avidemux handles the video viewer and if there's any way to adjust the window size without affecting the quality of the exported video.

Quality of exported video has nothing to do with the window size or zoom level of the preview in Avidemux GUI.

The zoom level is chosen to be 1:1 if possible, else downscaled to keep window dimensions not too large (please see SHRINK_FACTOR in Q_gui2.cpp). To use the entire available area of the screen, maximize the window. Press 1, 2, 3, or 4 to force an integer zoom level (2:1, 1:1, 1:2, 1:4) or 0 to fit into window.

Pixels are always square in the preview (no anamorphic transformation is applied) and the orientation is shown as coded (no matrix transformation is applied). This is a design decision.

If you experience GUI controls being pushed out of the screen, disable automatic HiDPI scaling in the Qt toolkit.

By all means, please use the most recent 2.8.2 nightly build, it is orders of magnitude less buggy and more stable than the last release (2.8.1).

Try latest night build: https://avidemux.org/nightly/

Personally on Windows 11 I use the latest build (Avidemux_2.8.2 VC++ 64bits 240906.exe) from https://avidemux.org/nightly/vsWin64/ with option "Video display"=DXVA2 (Edit->Preferences->Display) and do not have any problem with "video viewer".

How to change the size and position of the video viewer in Avidemux? I'm having trouble with the video viewer not being scaled to my screen size, making it difficult to edit videos. Is there a way to adjust the viewer to fit my screen without affecting the quality of the exported video?"

Problem details:

When I open a video in Avidemux, the video viewer is not scaled correctly, is cropped, or is too small, making it difficult to follow the editing process.
I've tried changing the settings in the Preferences menu, but there's no obvious option to adjust the viewer.
I need help understanding how Avidemux handles the video viewer and if there's any way to adjust the window size without affecting the quality of the exported video.
Looking forward to any help from the community!

Your main concern should be to make sure that none of post-processing options in Avidemux are enabled as they will ruin your video no matter how good (how low the CRF) the quality settings of the encoder are.