clever FFmpeg-GUI, small FFmpeg UI, fully portable, no installation.

[ProWo]

On the main page, I can edit and delete the list of streams. However, this has no effect.
The same applies to Cut. But when I delete the list and click on Cut, problems arise. It takes forever and has to be canceled. The app then becomes unstable. Files such as 000_fasc_step3.mkv may remain in the output folder.
With chapters, I can only mark them and not change anything. So no problem there.

Thy for the hint, fixed now, please update.

[Findu]

@ ProWo

v3.4.6.09 feedback

Edit for the Streams and Cut mark list field has been removed.
Colors for "Start at" values looks good.
Minor Lossless text changes also looks good.
"Change scan type" button always reappear.
ffmpeg code for cut now get displayed on the batch task site.

Thank you very much for all your hard work.

[davidt1]

Just updated to v3.4.6.09. ID for the multiplex button changed. This requires me to change my Autohotkey script accordingly.

This has nothing to do with the performance of Clever. It's just an observation.

[videoAI]

@ProWo
v3.4.6.09 feedback

Figured out the task bar icon not updating part ..

- scenario one: Progress bar goes to 100% quickly [~2sec],
the taskbar icon also goes to 100% but depending on color
theme it may not be very visible [especially to a visually
impaired person like me], and off course won't be updating
at all because it has already moved to 100%.

- scenario two: Progress bar is updating fine, the taskbar icon
starts to update only after the progress bar reaches ~8 to 9%.

** There is a lag between the icon progress and the main progress
bar progress of about 8-9% **

To replicate .. try a large mp4 file [~2gb], watch the icon and the
progress bar first 8% progress.

In both scenarios, the task bar icon looked static with no updates
in the first part of testing.

This issue may not be of high priority, but please see if tweaking
the icon progress code a bit can resolve it the next time you are
working on that part of the code.

Please don't mess with the ffmpeg status update, that code works
well.

TBD: the main progress bar going to 100% in 2 secs, on some mp4s
is still unresolved .. will update on this issue later.

@ProWo
v3.4.6.06
Issue:
- Task bar tab icon is not updating when clever is minimized.

[davidt1]

I encoded a file to opus at 160bk. This value is not memorized. It would be nice if it was, as it was before.

[Findu]

@ ProWo

The tooltip of the button First/None/All on the mux page still show "Select / deselect all streams".
Could the tooltip be expanded to "Select / deselect all streams. Or select all streams that contain the name of the first stream."

Could the tooltip of Delay expand to: "Set delay in milliseconds. Negative values ​​reduce delay."
Beginners may not know how to fix a delay.

You show the Bitrate range in Audio encoding. But the formatting varies, with and without spaces around the separator. Can you please standardize this?

[Findu]

@ davidt1

> I encoded a file to opus at 160bk. This value is not memorized. It would be nice if it was, as it was before.

The audio bitrate is memorized. But only as long as you select a different audio encoder.

[davidt1]

@ davidt1

> I encoded a file to opus at 160bk. This value is not memorized. It would be nice if it was, as it was before.

The audio bitrate is memorized. But only as long as you select a different audio encoder.

Sounds like you are saying, after I encode with opus, I need to select something else like before closing the app, for the opus value to be memorized. If that's the case, it is a work around. I like opus for audio. I don't want to select anything else.

In an older version of Clever, ProWo fixed this. Then a few versions later, it get messed up again.

[Findu]

After encoding with Opus, you can close the app. The next time audio encodeing opens, you have the same Opus bitrate as before. However, if the encoder or the number of channels is or has changed, your Opus value will be lost.

[Findu]

@ ProWo

How about adding a "Lock channels" option on the Audio page?
This setting should be saved. It would prevent the bitrate entered by the user from being changed if other files with different channels are loaded.
This would allow you to use the same audio setting (encoder, channels, bitrate, frequency) all the time.


[Attachment 89222 - Click to enlarge]

[ProWo]

How about adding a "Lock channels" option on the Audio page?
This setting should be saved. It would prevent the bitrate entered by the user from being changed if other files with different channels are loaded.
This would allow you to use the same audio setting (encoder, channels, bitrate, frequency) all the time.

That's not a good idea; different numbers of channels require different bit rates, i.e., more channels, more bit rate.

[ProWo]

The tooltip of the button First/None/All on the mux page still show "Select / deselect all streams".

Thx, will be changed.

Could the tooltip of Delay expand to: "Set delay in milliseconds. Negative values ​​reduce delay."
Beginners may not know how to fix a delay.

Not correct: the inserted values are the final result values, that means if you insert 10 ms, then this stream is delayed 10 ms in the muxed video.
Negative delays on audiostreams postpone the videostream start.

You show the Bitrate range in Audio encoding. But the formatting varies, with and without spaces around the separator. Can you please standardize this?

Will be done.

[Findu]

>> Lock audio channels
> That's not a good idea; different numbers of channels require different bit rates, i.e., more channels, more bit rate.

Yes, of course.
The use case is that some people always use the same audio settings, regardless of how many channels or what quality the source has. For example, aac, 128 bits, 2 channels and 44100 Hz.
I was looking for a way to retain all four user settings.
---

> Not correct: the inserted values are the final result values, that means if you insert 10 ms, then this stream is delayed 10 ms in the muxed video.
Negative delays on audiostreams postpone the videostream start.

Thanks for the explanation.
I tested it more thoroughly and it works exactly as described.
However, it doesn't work with mp4 files with offset (Brute Concrete - a 64K intro by UFDD 720.mp4). The offset is always set to zero. A new negative delay is also set to zero. A new positive delay is displayed in AAD. However, the audio is only shifted by the value of the offset.
Fix timestamps doesn't help here either.

Some days ago I had a video with an AAD of 784 and zero offset. After multiplexing, AAD was 0. But I didn't enter 0 in the “Delay” field. And audio still had a huge delay. I had to enter -9024 to synchronize it. AAD was at the end also zero. Sadly, I no longer have the original and fixed mp4 file to test.
This is also the cause of the misunderstanding about how it works.

[videoAI]

Feature Request

I know that numerous prior requests to edit Clever's generated ffmpeg command
from within the GUI were declined.

But how about enabling [or adding] one, or both, of these features:

1- Preview Command [ffmpeg command]:
Allows 'preview' before 'executing', and optionally 'cancelling out'.

or,

2- Last Command:
Displays the last executed ffmpeg command in the GUI.

++
- Both features do not change anything; Less headache for the Developer.
but will facilitate optimized output via new selections in the GUI.
- Both features will be valuable for testing, advanced users,
and would work as a teaching tool for beginners.

[ProWo]

Feature Request
1- Preview Command [ffmpeg command]:
Allows 'preview' before 'executing', and optionally 'cancelling out'.

This has already been implemented.
Select “to batch,” then click “batch tasks”.
Point the mouse pointer at the stream action column and the command line will be displayed.
If you don't like it, delete the task and create a new one.

[videoAI]

Thx

Feature Request
1- Preview Command

already implemented,
Select “to batch,” then click “batch tasks”.
Point the mouse pointer at the stream action column and the command line will be displayed.
If you don't like it, delete the task and create a new one.

[Findu]

@ ProWo

Problem with 3.4.6.09, las cut change
Some movies (check the sample) does not longer start ffplay with “Search cut points” and “Preview last cut.” Both functions work after you add any cut mark.
VirtualDub is working well.

EDIT2:
No Problem with 3.4.6.41
Problem with 3.4.6.07
I do not have .06 any longer to test.

EDIT:

BTW: If you don't allow VirtualDub to start on Windows beforehand, this error will appear. For example, if you update the player and haven't started it yet.
I don't know if it makes sense to catch the error and point it out.

System.ComponentModel.Win32Exception (0x80004005): Der Vorgang wurde durch den Benutzer abgebrochen
bei System.Diagnostics.Process.StartWithShellExecuteEx (ProcessStartInfo startInfo)
bei clever_FFmpeg_GUI.Form8.Button4_Click(Object sender, EventArgs e)
bei System.Windows.Forms.Control.OnClick(EventArgs e)
bei System.Windows.Forms.Button.OnMouseUp(MouseEventAr gs mevent)
bei System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
bei System.Windows.Forms.Control.WndProc(Message& m)
bei System.Windows.Forms.ButtonBase.WndProc(Message& m)
bei System.Windows.Forms.Button.WndProc(Message& m)
bei System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

[ProWo]

Problem with 3.4.6.09, las cut change
Some movies (check the sample) does not longer start ffplay with “Search cut points” and “Preview last cut.” Both functions work after you add any cut mark.
VirtualDub is working well.

Thx, bug, will be fixed.

BTW: If you don't allow VirtualDub to start on Windows beforehand, this error will appear. For example, if you update the player and haven't started it yet.

Just tested, updated virtualdub2 with the last version from October 2025, not started yet.
Updated the path in settings, then used with cut, search cut points.
No problems, no errors, only the first start reminder from virtualdub2.
Just for the record: I'm working with admin rights, maybe here could be a problem...

[Findu]

I mean that Windows Defender SmartScreen asks for permission to run at first start.
If you unnecessarily use a virus scanner from a third-party, this may be different as well.
I also use the portable version of VirtualDub.

[Findu]

@ ProWo

v3.4.6.010 feedback

The Search cut points problem with ffplay and files with offset has been fixed. Thanks.

I am now able to add delay -/+ to mp4 files with offset. Great.

And thanks for adding the new clean look to the Audio encoding pages.

The whole source channel info get loste when you click OK in the D-Mix options window.

Found two text glitches.

[Attachment 89299 - Click to enlarge]

[Attachment 89300 - Click to enlarge]


Can you move the text in the Encoder and PCM Codec drop-down menus up a little? Some characters, such as “p,” are cut off at the bottom. I use 125% display scaling.

[Attachment 89301 - Click to enlarge]

The drop down box of Duration for Fade out is two pixels wider than the other three.

How about the frame text “Channels (change, split, join)”. Because you don't necessarily expect split/join when you change the channels number.

[ProWo]

The whole source channel info get loste when you click OK in the D-Mix options window.

Thx, bug, will be fixed.

Found two text glitches.

I calculated the position for 100% scaling. I will change that.

Can you move the text in the Encoder and PCM Codec drop-down menus up a little? Some characters, such as “p,” are cut off at the bottom. I use 125% display scaling.

Unfortunately, that is not possible; the vertical text position cannot be changed in the domainupdown control. I could reduce the font size, but I do not want to do that.

The drop down box of Duration for Fade out is two pixels wider than the other three.

Will be fixed.

How about the frame text “Channels (change, split, join)”. Because you don't necessarily expect split/join when you change the channels number.

Good idea, will be done.

EDIT: Done.

[Findu]

That was quick. Only D-Mix (No downmix) loads a frame that is too small after clicking OK.


[Attachment 89302 - Click to enlarge]

Can you also move the “Change length and pitch” bottom edge frame down a little so that it matches the bitrate height?

[Findu]

v3.4.6.011 feedback for Chapters

Chanpers "Start time" default is now one minute instead of zero?
Oh, I see. It's a counter that counts up by one minute.

"At fixed intervals" is working well.

"At scene changes" does not work for me.
It doesn't matter whether they are clips, series, movies, mp4, or mkv files.
After processing I often get:

[Attachment 89310 - Click to enlarge]

Or it creates this:

;FFMETADATA1

[CHAPTER]
TIMEBASE=1/1000
START=000
END=32364831
title=Start

[CHAPTER]
TIMEBASE=1/1000
START=32364832
END=3662075
title=Chapter 1


BTW: "External file" loads every .txt file and can also delete it after muxing. Maybe you could check whether the first line contains “;FFMETADATA1”.

[sam12345]

@Findu

It do works but for short video lenght (20 min) as the command is 32bit integer code. For bigger length videos it has to be modified to 64bit integer code.
Try for short video [Sample Video]

[ProWo]

Chanpers "Start time" default is now one minute instead of zero?

Yes, the first chapter at 0 is created automatically.

"At scene changes" does not work for me.

Doesn't work for short videos. Retry with a 90 min movie.

[sam12345]

It works for 10 to 15 min short video. For a video to be for 60 min, 90 min, 2 hrs it doesn't. Fixed ones working fine. Can try a third option ... based on video lenght detection [ cut at fixed intervals..5,8,10,5,10,8,5,10 min...and so on] TXT below...

[sam12345]

CFFmpeg 3.4.6.11 made the chapters on scene detection but the output video after muxing is not generated. Tested on 30 min video lenght

[davidt1]

v3.4.6.11

Name of output file is truncated after muxing.

The Roses.2025.1080P.mkv becomes The Roses.202.mkv

Before muxing

[Attachment 89318 - Click to enlarge]

After muxing

[Attachment 89319 - Click to enlarge]

[Findu]

I have already tested videos with running times of 3, 15, 30, 50, and 130 minutes. If so, only two chapters are created.
---

Okay. Chanpers "Start time" is a counter that counts up by one minute.

When your first added cut is within the last minute of the play time (entered by typo), and you delete it, the Add button stay disabled.
---

When I enter “Star time” 55:51:00 and click Add, this error occurs:

System.OverflowException: TimeSpan konnte nicht analysiert werden, da sich mindestens eine der numerischen Komponenten außerhalb des gültigen Bereichs befindet oder zu viele Ziffern enthält.
---

Entering 5_:__:__ or 00:01:0_ and click Add or Return, this error occurs:

System.ArgumentOutOfRangeException: Der Index und die Länge müssen sich auf eine Position in der Zeichenfolge beziehen.
Parametername: length
---

An existing Created_chapters.txt will be overwritten. However, this is not likely to cause any problems.

[Findu]

v3.4.6.011 feedback

When I abbort Scan for errors, the Batch scan for errors option does not reappear.
When I click Scan again, the progress bar appears for a second, and I am redirected back to the main page.
If my first action is click To batch, I get a Scan result window: No errors were found!

If the mux grid is empty after muxing, the success message is not displayed, but appears on the main page.