Avidemux Forum

Have you done the SRT thing? SRTs will provide you the subs you need (for MP4s in VLC, anyway), and when editing the video, cutting parts out or whatever, well, you literally have your work cut out for you ; SRTs can be edited, but it's a lot of painstaking manual effort to change all the timestamps after the points of edit, and depending on how much dialogue there is, you could be looking at thousands of individual captions that need their timestamp adjusted to the new timestamp, post-edit.

I dunno if this helps you at all, or if I am even in the ballpark of your issue, but there it is, anyway.

Okay, so, a new development I stumbled upon during yet another conversion session to AVC (H264) from a HEVC (x265) file mysteriously decided to encode at a far smaller file size than ought to be (when using CBR @  2500kbit/s for video)...

It turns out, the framerate is reduced by half, from the file's original 23·98, to 12. Even when in AVC, playback of the original HEVC file appears a bit choppy, but I have seen numerous videos of both HEVC and AVC exhibit some odd playback issues that do not affect the encoding.

Previously, when I would get these low file size outputs, I would increase the CBR to crazy values (and still come in well under the desired target of 2500kbits/s). Now discovering this framerate issue, and use normal values, but I also add the framerate filter, selecting 23·98.... but this does not help.

While I get a better filesize output, the playback is choppy/stuttery, as if I attempted to increase a video with a 12fps to 24fps.

Clearly that is what is happening here - these alleged 24fps HEVCs (which play fine in their original state) somehow get converted to 12fps during the conversion process, and attempts to retain/lock-in the 24 (23·98) fps just yields a stuttery/choppy video in playback anyway.

So, two questions :
1. WHY does this happen / what causes it?
2. HOW do I get around this / fix it?

(This is why compressing videos sucks, and is the stupidest idea ever. And HEVC sucks balls, more than ever!)

win7 нуждается в поддержке в новых версиях, вы знаете об этом, или, может быть, вы знаете альтернативную программу для win7 с фичами как в avidemux за бесплатно?
если такой командой перевернуть видео
ffmpeg -i "C:\video.mkv" -c:a mp2 -b:a 224k -map_metadata 0 -metadata:s:v rotate="90" -vcodec copy "C:\video.mp4"
, то любой плеер воспроизведёт его правильно и даже youtube, но только не avidemux, тебе просто очень нужна функция поворота для окна предпросмотра и функция чтения/записи метадаты видео для mp4, mov

win7 needs support in new versions, do you know about it, or maybe you know an alternative program for win7 with features like in avidemux for free?
if you use this command to flip the video
ffmpeg -i "C:\video.mkv" -c:a mp2 -b:a 224k -map_metadata 0 -metadata:s:v rotate="90" -vcodec copy "C:\video.mp4"
, then any player will play it correctly and even youtube, but not avidemux, you just really need the rotation function for the preview window and the read/write function for video metadata for mp4, mov

FLAC raw or ogg-encapsulated streams are not supported for external audio tracks in Avidemux. You need to convert them into uncompressed 16 or 24 bit signed integer WAV files first (which is lossless) using flac executable or a tool which provides the functionality like approximately built ffmpeg.

I tried adding a FLAC audio file to a H.264 video on Avidemux, but I keep running into an error saying I can't add it. What should I do to fix it?

Hello, may I know where's the source code in order to try and compile the last cersion for Catalina?
Many thanks!

I'm a little embarrased that I never saw that before, but thanks very much for pointing it out to me.  At least your post will be here in the future in case this happens to someone else.

In the Crop filter check the "Hide Rubber Band".

I have been using Avidemux for several years on at least 6 systems (including setting it up for friends) and haven't seen this before.  I haven't found it in the index.

When I use filters, normally a screen comes up which shows the video, and various other pieces of information.  The video image used to always look the same as the main screen.

A day ago, the screen for the crop filter changed: it now has a red cross-hatch and red borders, which makes it much harder to see how to crop an image.  It appears to have changed only for the crop filter, the other filters still look fine.  I can't find any setting changes that could have caused this, and have not made any changes to my preferences.  The only changes to the system (Windows 10 22H2) are Microsoft defender security updates, and I don't think I even did that between the times the display was normal and when it showed red.  I did not install or remove any other programs during this time.

The only other thing that happened was that Avidmux crashed.  This appears to have been caused by a WMV video that was corrupted or improperly encoded.  I'm running 2.8.1

Does anyone know why this happened, and how I can remove it and get the 'normal' screen display back?

Thanks in advance.

Oh god...

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

What "mediainfo"? It's HEVC!! Self-explanatory! A compressed video file that decompresses/decodes on the fly during playback, which causes long pauses and hangs when manually jumping to random points in the movie, hence why HEVC sucks. Annoying as hell.

AVC does not do that, as it is not compressed, and the very reason why I want HEVC files converted to AVC.

Most times, a HEVC will convert to AVC without any undesired results that cannot be explained or corrected. I use the Constant Bitrate Single Pass @ 2500kbps (or higher, if necessary, which I do not find out til after 2 hours of converting time is wasted), in hopes that the output comes as close to a video bitrate of 2500kbps without going over (the occasional 2501 is acceptable) or less than 2495.

But every now and then, a HEVC file comes along that pulls this half-ass nonsense. HEVCs are smaller than AVC so they should always yield a bigger file size with a bitrate close to the value (2500+) that I entered, but it's slashing to much smaller instead.

I cannot see anything in the source file's details that would be a red flag. I use VLC and Mp3Tag ediotr to see this info (if it's available - another strike against HEVC is that all but the audio bitrate, run time, and filesize shows as blank in Mp3Tag editor - no aspect ratio dimensions, no video bitrate).

These problematic HEVCs appear no different from the other ones that convert easily ; same aspect ratio (1920x800-1080p), same audio codec (AAC), same audio bitrate (224kbps), same audio sample frequency (48kHz), same framerate (23.98 or 24 fps), and same container (mp4).

Since posting this topic, I suspect the only workaround is to take whatever LOW video bitrate output is yielded from an initial conversion, double it, and if the sum is more/less than 2500, then (respectively) subtract/add the difference to the target value preset of 2500, after DOUBLING it first (to 5000), and then modify accordingly until the desired outcome is achieved...? I have yet to test this theory for consistency and reliability, though... but based on the 2 recent experiences I had where this bizarre phenomenon occurred, it looks that way.

It's hard enough to obtain the desired 2500kbps (acceptable variable range of 2495-2501) - with no way to even get an estimated output BEFORE encoding so I am not re-encoding all day long trying to hit the target - without these random HEVCs adding to the hassle by pulling a "shrinkflation" stunt for no apparent reason.


>>> "What are these encoding options now?"

Whatever Avidemux 2·7·1 offers. I am honestly not sure what you are asking me here. I get the feeling even if knew and I told you, it would make no difference cos you'd be as clueless as I am as to the reason for this "HEVC half-ass" conversion issue.

I also doubt upgrading anything will even be possible (I assume that will be the default reply/suggestion from many ; the one-size-fits-all answer to everything, whether it makes practical sense or not - "juss UPGRADE, bruh!").

Sadly, I must be cautious with upgrading since I have an older system (XP 32bit) that I prefer, cos I have over a decade of work created on that platform, comprised of thousands of files that are dependent on unique-to-32bit programs that created and opens those files. If something won't run (is not supported) on XP 32bit, then it's useless to me, and I cannot afford newer computers, so even if I was open to an upgrade, finances say no.


>>> "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"

Portable shmortable. I have no idea what that means or anything about that. Sounds like bigger problems in a smaller filesize.