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

[oniiz86]

@ProWo There seems to be a bug with this 7.1 AAC test file when extracting with CleverFFmpeg-GUI, it doesn't retain channel info metatdata, it's missing the reporting of "7.1 channels" when I import it into eac3to, when I use gMKVExtractGUI there is no issue when it's extracted & the .aac stream reports 7.1 channels, would this be a FFmpeg issue or is it with Clever?

Thanks for the hint.
Tested, this happens with HE-AAC only; it's a FFmpeg bug.
However, the extracted files can be used without any problems in the vast majority of applications.

@ProWo Thanks for that, I did some further testing, the CleverFFmpegGUI extracted aac 7.1 stream remuxed into the mka container with MKVToolNix & then demuxed again by Clever will result in the reporting of "7.1 channels", so it may not be an FFmpeg bug but a Clever issue in this instance, not sure why there is a discrepancy there with the metatdata, it isn't a corrupted test file, is there anything you could check or test within Clever for this?

This is the Clever extracted aac stream remuxed into the mka container with MKVToolNix then demuxed again with Clever & now reports 7.1 channels in eac3to.


[Attachment 92367 - Click to enlarge]

[ProWo]

@ProWo Thanks for that, I did some further testing, the CleverFFmpegGUI extracted aac 7.1 stream remuxed into the mka container with MKVToolNix & then demuxed again by Clever will result in the reporting of "7.1 channels", so it may not be an FFmpeg bug but a Clever issue in this instance, not sure why there is a discrepancy there with the metatdata, it isn't a corrupted test file, is there anything you could check or test within Clever for this?

Retested.
It's definitely not a clever issue.
I tried extracting and muxing manually using the command line, but the problem remains the same.
FFmpeg is writing something into the stream that doesn't comply with the specifications.
As I said, this only affects HE-AAC with more than 2 channels.

[ProWo]

----------------------------------------------------------------------------------
May 31, 2026 release version 3.5.5.
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Added:
Title column in extract streams screen
Batch replication with embedded subtitle burn in
Different framerate detection dialog
Batch tasks total on button
Language tag check for invalid characters

Fixed:
Bug with missing streams titles after muxing
Bug with filenames in replicated batch tasks
Bug with filename in multiplex section

Changed:
Default downsampling scale algorithm

Improved:
Language code in filename recognition

----------------------------------------------------------------------------------

[Findu]

@ProWo

3.5.5 feedback

Good idea to add batch tasks total on button.

Is it intended that you can sort by column profile in extract streams screen?
And the profile column does not auto width for longer text like "Dolby Digital Plus + Dolby Atmos".

[ProWo]

Is it intended that you can sort by column profile in extract streams screen?

No, will be fixed.

And the profile column does not auto width for longer text like "Dolby Digital Plus + Dolby Atmos".

Thx, will fix this.

[Henryk69]

Hello ProWo
I have a 6-channel video and I want to extract the audio track from it. Your program shows me what's in the picture, but when I change the audio options to 2 channels, it starts downloading.

[Attachment 92768 - Click to enlarge]

[ProWo]

Hello ProWo
I have a 6-channel video and I want to extract the audio track from it. Your program shows me what's in the picture, but when I change the audio options to 2 channels, it starts downloading.

Hi Henryk69,
your image shows the audio encoding page.
You're in the wrong place to extract a stream.
Go back to the main page, click "Extract Streams," select only the AAC audio stream on the left, and click "Extract."


[Attachment 92769 - Click to enlarge]

BTW
You are using an old version. Please update (Settings & more, update).

[Henryk69]

Hello Pro Wo
Thank you for the info about the old version of the program. Strange things were happening to me in that old version of the program. For example, I extracted the sound from a video that, when I put it on the same video, was out of sync, and from the beginning, there was a 6-second silence missing, and after that, nothing matched.

[Henryk69]

Hello Pro Wo
But how do I get to this window, because the program shows me something else.

[Attachment 92776 - Click to enlarge]

[Henryk69]

I checked and it went away

[Attachment 92777 - Click to enlarge]

[Henryk69]

Hello Pro Wo
However, I still have the same problems extracting audio from the same video and then doing nothing with it, just muxing it in mkvtoolnix to the same video file and there's no sync. When I did it on another laptop before, everything worked, but it's being repaired because it was overheating.


Halo Pro Wo
I updated all my programs to the latest versions and the problem was solved.

[oniiz86]

@ProWo Hey ProWo, I just thought to let you know if you could restore the broken link for the tonemapping info on the Video Encoding screen, the link http://underpop.online.fr/f/ffmpeg/help/tonemap.htm.gz returns a 500 Internal Server Error.

[Attachment 92845 - Click to enlarge]

[Attachment 92846 - Click to enlarge]

@ProWo I noticed in your post there is a 3.5.5.02 beta version but when I click on "settings and more" the update does not appear & the latest beta is 3.5.5.01

[ProWo]

@ProWo Hey ProWo, I just thought to let you know if you could restore the broken link for the tonemapping info on the Video Encoding screen, the link http://underpop.online.fr/f/ffmpeg/help/tonemap.htm.gz returns a 500 Internal Server Error.

Thx for the hint, you're right, Underpop has removed the FFmpeg help pages from its server.
That's a shame, because those help pages were much better than the official FFmpeg documentation.
I'll replace all the Underpop links and link to the official FFmpeg documentation instead.

@ProWo I noticed in your post there is a 3.5.5.02 beta version but when I click on "settings and more" the update does not appear & the latest beta is 3.5.5.01

3.5.5.02 is the version I'm currently working on. It hasn't been released yet.

[BlueSky]

Hi and greetings. First time poster and trying to use ffmpeg to correct audio drift in an MP4 file I have. The video starts out in sync and then at the end the audio and video are about 1.2 seconds off.

I understood that there may be a way to correct the drift over time but am unsure how to do it. I have extracted the video, audio and subtitle streams to a folder. When I extracted the video, there was an indication that there were two different frame rates involved and I selected 23.976. Now that I have the three streams, I am unsure how to multiplex them back to that the audio is compressed over time by the 1.2 seconds or so that it would take to get them back into alignment.

Can anyone possibly help me figure it out?

Thanks in advcance!

[ProWo]

@BlueSky
Based on the information you've given me here, I can't offer you any help.
The best thing to do is to upload the video somewhere and post the link here.
Then I can download it, take a look at it, and offer you specific help.

[Findu]

@ProWo

3.5.5.01 feedback

When I combine amf hwaccel with h264_amf or hevc_amf encoding (av1_amf does not work on my system) and scaling of a video, like that code:

FFmpeg -vsync 0 -hwaccel amf -hwaccel_output_format amf -fflags +genpts -i "C:\Users\Findu\Downloads\input.mp4" -vf fps=24000/1001,vpp_amf=w=720,vpp_amf=h=300:flags=lanczos,for mat=amf -map 0:0 -c:v h264_amf -g 120 -keyint_min 120 -rc 0 -qp_i 25 -qp_p 26 -qp_b 27 -aspect 2.4 -an -sn -dn -metadata:g encoding_tool="clever FFmpeg-GUI"

ffmpeg report: Error applying option 'flags' to filter 'vpp_amf': Option not found

The option 'flags' need to be replaced with 'scale_type' and only bilinear and bicubic is supported.



I will test qsv hwaccel + qsv encoding + scale later...

---

When you switch to Color Space BT.470BG and switch back to Like source, the ffmpeg code does not get reset and still use the BT.470BG code (zscale=min=1:pin=1:tin=1:m=5:p=5:t=6)