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

[ProWo]

@Findu, davidt1, VideoAI, mannequin80
Update to the last nightly and continue testing.

[videoAI]

@ ProWo

3.4.2.05 20250624 Feedback

Media info:
General
Complete name : C:\T\MP4\Mobile\YK9u776H_720p.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 710 KiB
Duration : 3 s 948 ms
Overall bit rate : 1 473 kb/s
Frame rate : 30.000 FPS
Writing application : Lavf58.45.100

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Constrained Baseline@L3
Format settings : 2 Ref Frames
Format settings, CABAC : No
Format settings, Reference fra : 2 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3 s 867 ms
Bit rate : 1 426 kb/s
Width : 848 pixels
Height : 464 pixels
Display aspect ratio : 1.85:1
Frame rate mode : Constant
Frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.121
Stream size : 673 KiB (95%)
Writing library : x264 core 160 r3011 cde9a93
Encoding settings : cabac=0 / ref=2 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=14 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=30 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=1200 / vbv_bufsize=2400 / crf_max=0.0 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 3 s 948 ms
Bit rate mode : Constant
Bit rate : 66.2 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 31.9 KiB (4%)
Default : Yes
Alternate group : 1

bug in Crop as shown in attached image below ..
bug is reproduceable on clever nightly, and actual release, for this specific video file (click crop button),
bug does not occur on all mp4 files, just this one so far.

The crop boxes seem to populate meta data from my video file, look at 'Left'.

I tried to change the actual crop start value, got an instant crash ... just by pressing the back space.

This seems to be a separate bug, in addition to the one above.

************** Exception Text **************
System.InvalidCastException: Conversion from string "" to type 'Double' is not valid. ---> System.FormatException: Input string was not in a correct format.
at Microsoft.VisualBasic.CompilerServices.Conversions .ParseDouble(String Value, NumberFormatInfo NumberFormat)
at Microsoft.VisualBasic.CompilerServices.Conversions .ToDouble(String Value, NumberFormatInfo NumberFormat)
--- End of inner exception stack trace ---
at Microsoft.VisualBasic.CompilerServices.Conversions .ToDouble(String Value, NumberFormatInfo NumberFormat)
at clever_FFmpeg_GUI.V_crop.TextBox5_TextChanged(Obje ct sender, EventArgs e)
at System.Windows.Forms.Control.OnTextChanged(EventAr gs e)
at System.Windows.Forms.TextBoxBase.OnTextChanged(Eve ntArgs e)
at System.Windows.Forms.TextBoxBase.WmReflectCommand( Message& m)
at System.Windows.Forms.TextBox.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

************** Loaded Assemblies **************
mscorlib
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9300.0 built by: NET481REL1LAST_C
CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/mscorlib.dll
----------------------------------------
clever FFmpeg GUI
Assembly Version: 1.0.0.0
Win32 Version: 3.4.2.05
CodeBase: file:///C:/Portable/PortableApps/CleverFFmpegGUI/clever%20FFmpeg%20GUI.exe
----------------------------------------
Microsoft.VisualBasic
Assembly Version: 10.0.0.0
Win32 Version: 14.8.9032.0 built by: NET481REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Microsoft.VisualBasic/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll
----------------------------------------
System
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9282.0 built by: NET481REL1LAST_C
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Core
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9297.0 built by: NET481REL1LAST_C
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll
----------------------------------------
System.Windows.Forms
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9256.0 built by: NET481REL1LAST_B
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9032.0 built by: NET481REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Configuration
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9032.0 built by: NET481REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
----------------------------------------
System.Xml
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9032.0 built by: NET481REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll
----------------------------------------
System.Runtime.Remoting
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9214.0 built by: NET481REL1LAST_B
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Runtime.Remoting/v4.0_4.0.0.0__b77a5c561934e089/System.Runtime.Remoting.dll
----------------------------------------
PortableSettingsProvider
Assembly Version: 0.2.5.0
Win32 Version: 0.2.5.0
CodeBase: file:///C:/Portable/PortableApps/CleverFFmpegGUI/PortableSettingsProvider.DLL
----------------------------------------
System.Xml.Linq
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9032.0 built by: NET481REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xml.Linq/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.Linq.dll
----------------------------------------
Accessibility
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9032.0 built by: NET481REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Accessibility/v4.0_4.0.0.0__b03f5f7f11d50a3a/Accessibility.dll
----------------------------------------
System.Web.Extensions
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9282.0
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Web.Extensions/v4.0_4.0.0.0__31bf3856ad364e35/System.Web.Extensions.dll
----------------------------------------
System.Web
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9282.0 built by: NET481REL1LAST_C
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_64/System.Web/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Web.dll
----------------------------------------

[ProWo]

@VideoAI
You start the crop at 5 seconds, but the video duration is shorter....
retry to start at 1 second.

[videoAI]

@ProWo

I didn't actually start the crop at 5 seconds .. that was the default pre-filled value.
Retrying start at 1 sec, resolved the issue.

Thank You.

The second issue / bug, if I try clearing the start input box by using the back
button on my keyboard, I get an instant crash.

Try it ..

@VideoAI
You start the crop at 5 seconds, but the video duration is shorter....
retry to start at 1 second.

[ProWo]

I didn't actually start the crop at 5 seconds .. that was the default pre-filled value.
Retrying start at 1 sec, resolved the issue.

The second issue / bug, if I try clearing the start input box by using the back
button on my keyboard, I get an instant crash.

Try it ..

All fixed, update to the last nightly.

[videoAI]

I confirm that bug #6 [Crop start input field] is resolved with Clever Ver. 3.4.2.051

Thank you .. and keep up the good work.

I didn't actually start the crop at 5 seconds .. that was the default pre-filled value.
Retrying start at 1 sec, resolved the issue.

The second issue / bug, if I try clearing the start input box by using the back
button on my keyboard, I get an instant crash.

Try it ..

All fixed, update to the last nightly.

[videoAI]

@ ProWo

3.4.2.051 Feedback

Some cosmetic / minor changes to consider for your next release:

- Join Screen; Please change "Cutted" to "Cut" [past tense of cut is cut] cutted-or-cut
- Cut Screen; Preview; Please assign mouse middle button to [Pause/Play]
- Cut Screen; Preview; Please assign mouse Scroll Wheel to [Preview Volume Control]

I promise not to get mad if you decide not to implement any of the above, but
I am sure will be glad if you decide to implement them.

Thank you and keep up the good work.

[videoAI]

@ ProWo

3.4.2.051 Feedback

After Bug#6, I decided to check all input fields for blank input validation bugs.

I tested the Audio Encoding screen .. no issues

Then I checked the Video Encoding screen ..

Bug#7

if I clear the FPS field and toggle the keep duration check box, I get a crash

P.S. since most of the errors introducing crashes are of type "Index Out Of Range",
would it make since to check all the code that uses indexes for added validation.

************* Exception Text **************
System.IndexOutOfRangeException: Index was outside the bounds of the array.
at clever_FFmpeg_GUI.Form6.Fps_control()
at System.Windows.Forms.CheckBox.OnCheckedChanged(Eve ntArgs e)
at System.Windows.Forms.CheckBox.set_CheckState(Check State value)
at System.Windows.Forms.CheckBox.OnClick(EventArgs e)
at System.Windows.Forms.CheckBox.OnMouseUp(MouseEvent Args mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

************** Loaded Assemblies **************
mscorlib
Assembly Version: 4.0.0.0
Win32 Version: 4.8.9300.0 built by: NET481REL1LAST_C
CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/mscorlib.dll
----------------------------------------
clever FFmpeg GUI
Assembly Version: 1.0.0.0
Win32 Version: 3.4.2.51
CodeBase: file:///C:/Portable/PortableApps/CleverFFmpegGUI/clever%20FFmpeg%20GUI.exe
----------------------------------------

[ProWo]

Some cosmetic / minor changes to consider for your next release:
- Join Screen; Please change "Cutter" to "Cut"

It's "Cutted" atm (not "Cutter"); will change it to "Cut"

- Cut Screen; Preview; Please assign mouse middle button to [Pause/Play]
- Cut Screen; Preview; Please assign mouse Scroll Wheel to [Preview Volume Control]

FFplay is a simple player with poor controls.
Pause/Play is already occupied by the space bar, Volume control is not available.

[ProWo]

Bug#7
if I clear the FPS field and toggle the keep duration check box, I get a crash

This is obvious. If you toggle the keep duration check box, the duration is recalculated;
the FPS value is required for this. If this is missing, the calculation cannot be carried out.
I will find a solution.

EDIT: Fixed. Reupdate.

[Findu]

@ ProWo

3.4.2.51 Feedback

Done: Change Multiplex page text to "Set / change".
Fixed: Chapter Video only works when the source file video stream has idx 0.
Add: Embedded chapters are saved when an audio stream is encoded into M4A/MKA container. Cool!

---

When you have processed streams (or Batch tasks) and start the app, you stay at the Select source file page and do not get forwarded to Multiplex/Batch any longer. That's okay. Therefore, the detection of processed streams or batch tasks should be indicated under the page Herding or somewhere else. Perhaps also on the main page. Maybe in color?
I'm not suree whether the list of the files in question should also appear, since it is a popup
Anyway. When you click Join then Return, you get this message:

[Attachment 87615 - Click to enlarge]

---

New multiplex grid behaviour in conbination with Chapters Video:

1a. If idx 0 is an processed audio stream and the grid also contain a video stream, Chapter Video now plays pure audio. Cool!
1b. If idx 0 is an processed audio stream and you swap the source video stream to idx 0, audio ist played instead of video.
1c. Hiding the audio stream does not change that behaviour of 1b.

I might found the problem. Swap is not enough. After the click on Swap use None then All to reselect or refresh the new sorted streams and it's working.

[ProWo]

When you have processed streams (or Batch tasks) and start the app, you stay at the Select source file page and do not get forwarded to Multiplex/Batch any longer. That's okay. Therefore, the detection of processed streams or batch tasks should be indicated under the page Herding or somewhere else. Perhaps also on the main page. Maybe in color?

I want to do this as unobtrusively as possible and with as little interaction as possible; if streams/batches are available, you will find them in the corresponding windows (mux, join, batch tasks).

I'm not suree whether the list of the files in question should also appear, since it is a popup
Anyway. When you click Join then Return, you get this message:

Already fixed.

New multiplex grid behaviour in conbination with Chapters Video:

1a. If idx 0 is an processed audio stream and the grid also contain a video stream, Chapter Video now plays pure audio. Cool!
1b. If idx 0 is an processed audio stream and you swap the source video stream to idx 0, audio ist played instead of video.
1c. Hiding the audio stream does not change that behaviour of 1b.

I might found the problem. Swap is not enough. After the click on Swap use None then All to reselect or refresh the new sorted streams and it's working.

Should be already fixed. Reupdate.

[videoAI]

Can {Pause/Play} not be triggered by keyboard and mouse??

- Cut Screen; Preview; Please assign mouse middle button to [Pause/Play]
- Cut Screen; Preview; Please assign mouse Scroll Wheel to [Preview Volume Control]

FFplay is a simple player with poor controls.
Pause/Play is already occupied by the space bar, Volume control is not available.

[videoAI]

@ProWo

-- Feature Request --

I have a folder containing 1200 mp4s. I wanted to scan them all for errors.
Since checking the files one by one in Clever was not an option, I downloaded another
tool to do the job. The tool is a GUI of an FFMPEG script.

The tool did the job but was slow and generated some false positives.

Since Clever already supports 'scan for errors' and batch processing; is it not possible to
combine both to scan many files? or to scan a folder [of files]?

A feature like that would be a big time saver.

[videoAI]

Confirmed.
Bug#7 fixed.

Thank you.

Bug#7
if I clear the FPS field and toggle the keep duration check box, I get a crash

This is obvious. If you toggle the keep duration check box, the duration is recalculated;
the FPS value is required for this. If this is missing, the calculation cannot be carried out.
I will find a solution.

EDIT: Fixed. Reupdate.

[davidt1]

@Findu, davidt1, VideoAI, mannequin80
Update to the last nightly and continue testing.

It's working great for me now; all the streams are checked after the files are loaded via drag and drop. Thank you.

[Findu]

@ ProWo

3.4.2.52 behaves like 3.4.2.51.

The update window does not open in 3.4.2.52.

[ProWo]

3.4.2.52 behaves like 3.4.2.51.

You are right, it should be fixed now.

The update window does not open in 3.4.2.52.

Damn... bug, fixed.

Update manually to the latest beta, online now.

[ProWo]

TO ALL!

There is a bug in the updater in v3.4.2.52.
Anyone using this version should manually update to the latest beta.

https://files.videohelp.com/u/292773/clever_ffmpeg_gui_newest_beta.zip

Sorry, shouldn't have happened.

[ProWo]

-- Feature Request --
Since Clever already supports 'scan for errors' and batch processing; is it not possible to
combine both to scan many files? or to scan a folder [of files]?

Unfortunately, the way in which the error scan is performed cannot be executed as a batch.

[Findu]

@ ProWo

The update window of 3.4.2.53 default is set to Update to last nightly.
When you switch to Don't update and click OK, reopen Update and switch again to Don't update and click OK, the update window does not open any longer.

I wanted to check if the last selection is saved or if nightly is the default.

[videoAI]

@ProWo

I am including some links related to the subject .. if you change your mind later.

how-to-quickly-batch-scan-video-files-to-check-for-integrity-corrupt-valid

batch scan

https://github.com/nhershy/CorruptVideoFileInspector

-- Feature Request --
Since Clever already supports 'scan for errors' and batch processing; is it not possible to
combine both to scan many files? or to scan a folder [of files]?

Unfortunately, the way in which the error scan is performed cannot be executed as a batch.

[ProWo]

The update window of 3.4.2.53 default is set to Update to last nightly.
When you switch to Don't update and click OK, reopen Update and switch again to Don't update and click OK, the update window does not open any longer.

Could be that the server was not reachable.

I wanted to check if the last selection is saved or if nightly is the default.

Update to nightly is the default now.

[Findu]

@ ProWo

3.4.2.54 Feedback

>> When you switch to Don't update and click OK, reopen Update and switch again to Don't update and click OK, the update window does not open any longer.
> Could be that the server was not reachable.

Good tip. This only happens if I do it quickly!

---

Could the default "Update to last nightly" be changed to the user's last selection?
This way, more user groups (not only nightly) can benefit from this feature and save one click.
Also because I think the last nightly is less for everyone than a beta.

---

When you have processed sub streams and start the app, click Join, click Return, you still get this message:

[Attachment 87622 - Click to enlarge]

There are no unused cut files!

Will you change the text "Unused cutted..." to "Unused cut..." as well?

---

New multiplex grid behaviour in conbination with Chapters Video:

1a. Chapters Video is only availabel when a video stream is selected. Good.
1b. Therefore, you can not longer play pure audio.
1c. Therefore, swap streams is less required.

[ProWo]

Could the default "Update to last nightly" be changed to the user's last selection?
This way, more user groups (not only nightly) can benefit from this feature and save one click.
Also because I think the last nightly is less for everyone than a beta.

No, I want to leave it at last nightly, because this version is the most mature version with all known bugs fixed.

When you have processed sub streams and start the app, click Join, click Return, you still get this message:
There are no unused cut files!
Will you change the text "Unused cutted..." to "Unused cut..." as well?

Already fixed.

[Findu]

> No, I want to leave it at last nightly, because this version is the most mature version with all known bugs fixed.

Yes, of course I understand.

---

The "Unused Cut Files" window that appeared without such files was fixed in 3.4.2.55. Thanks!

The "Insert chapters" option could also be offered for the supported audio formats at the Join page.

[ProWo]

>
The "Insert chapters" option could also be offered for the supported audio formats at the Join page.

No, because the joined audiofiles retaines her extensions (g.e. ac3, aac, mp3) and cannot contain chaperts.

[ProWo]

----------------------------------------------------------------------------------
June 28, 2025 release version 3.4.3.
----------------------------------------------------------------------------------
Added:
Check for wrong paths with assist apps (text editor, virtualdub).
Frame accurate cutting with smart rendering (for h264 in mp4/mov/mkv/avi atm).
Hide/show selected streams in mux grid.
Stay open checkbox in mux grid.
Input limitations for idx field in mux/batch grid.
Output destination setting is saved now.
Check for cd_rom drive (to avoid wrong destination selection).
Select/deselect all streams of type, clicking on it's field (upper right) in mux grid.
Create/add chapters for mux audiofile only.
Input limitation for start time textbox in video crop (now numbers only).

Fixed:
Bug with cut/to batch buttons in cut grid.
Bug in caption index (allowed range from -1 to 1)(thx to Findu for the hint).
Bug with closing X (removed now) in ISO language code help (thx to Findu for the hint).
Bug in raw video extraction with mpeg2video codec.
Bug with new encode length with frame accurate cutting.
Bug with preview length with frame accurate cutting.
Bug with missing aborted reset and closing to batch action in audio encoding.
Bug with missing handler remove in mux grid.
Bug with create chapers file.
Bug with end time <= start keyframe time in cut grid.
Bug with source avs file beeing deleted.
Bug in video preview in chapters form.
Bug in videostream reference for chapters in mux form.
Bug with chapters help window position.
Bug with missing simple remux checkbox in mux grid.
Bug with selected input_file ID and idx in mux grid/chapters (thx to Findu for the hint).
Bug with select/deselect streams of type in mux grid.
Bug in video crop start time selection (thx to VideoAI for the hint).
Bug with source folder value in first start window.
Bug with toggle keep duration checkbox with FPS value missing in video encoding (thx to VideoAI for the hint).
Bug with shortest videos (g.e. 3 sec) and empty start time box in video crop (thx to VideoAI for the hint).
Bug with updater.
Bug with processed/cut files reminder (thx to Findu for the hint).

Changed:
Language code from filename recognition to standard naming convention.
Streams handling in mux grid.
Task completed label instead of message box in mux grid.
Remove muxed streams handling.
Sample handling in mux grid.
Simple remux handling.
Hide streams instead of clear streams (no stream files are deleted now) in mux grid.
Cut help (added frame accurate cut info).
Only first readed file in muxgrid is automatically checked.
Audio delay math in mux grid.
None/all affects only visible streams in mux grid now.
App update.
Moved chapters section from main page to mux grid.
HDR Label on all interested sections now.
Removed reminder for open tasks and unused files on app start/closing.
Start behaviour with open tasks and unused processed streams (will appear in the interested sections now).
Success label instead message box in audio encoding section.
Muxed processed files or joined cut files are removed after successfull action.
Check for unused processed/cut files after leaving mux grid/join grid.
Start time and increment for shortest videos in video crop section.

Improved:
Mux grid.
Language code handling in mux grid.
Chapters help.
Chapters handling.

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

Please note:
As of this release, I will no longer make announcements for the last nightly.
Just use the update function regularly.

[videoAI]

@ProWo

FFplay does indeed support volume control [up or down] ..

The command `ffplay -af "volume=2" input.mp4` is used to play a video file named `input.mp4` with an audio filter that increases the volume by a factor of 2. Here's a breakdown of the command:

- `ffplay`: The command to invoke the FFmpeg media player.
- `-af "volume=2"`: This option applies an audio filter to the input. The `volume` filter multiplies the audio amplitude by the specified factor. In this case, `2` means the volume will be doubled.
- `input.mp4`: The name of the input video file to be played.

### Detailed Explanation

- **`ffplay`**: This is the command-line tool for playing multimedia files and streams. It is part of the FFmpeg suite.

- **`-af "volume=2"`**: This option applies an audio filter to the input. The `volume` filter is used to adjust the volume of the audio. The value `2` means the volume will be doubled. The syntax for audio filters in `ffplay` is `-af "filter1,filter2,..."`, where you can chain multiple filters if needed.

- **`input.mp4`**: This is the path to the input video file you want to play. Replace `input.mp4` with the actual path to your video file.

### Example Usage

To play `input.mp4` with the volume doubled:

ffplay -af "volume=2" input.mp4

To lower the audio volume by 30%, you can use the `volume` audio filter with a factor that represents the desired reduction. Since you want to lower the volume by 30%, you need to multiply the audio amplitude by 0.7 (100% - 30% = 70%, or 0.7 in decimal form).

ffplay -af "volume=0.7" input.mp4

### Additional Audio Filters

You can chain multiple audio filters if needed. For example, to apply both a volume increase and a low-pass filter, you could use:

ffplay -af "volume=2,lowpass=f=2000" input.mp4

In this example:
- `volume=2`: Doubles the volume.
- `lowpass=f=2000`: Applies a low-pass filter with a cutoff frequency of 2000 Hz.

### Other Useful Audio Filters

- **`volume=value`**: Adjusts the volume. `value` can be a positive number to increase the volume or a number between 0 and 1 to decrease the volume.
- **`pan=stereo|mono|stereo|mono`**: Converts the audio to the specified channel layout.
- **`highpass=f=cutoff`**: Applies a high-pass filter with the specified cutoff frequency.
- **`bandpass=f=lowcutoff:highcutoff`**: Applies a band-pass filter with the specified low and high cutoff frequencies.
- **`equalizer=f=center:width:gain`**: Applies an equalizer filter with the specified center frequency, width, and gain.

### Conclusion

You can customize the audio filters to suit your needs by chaining multiple filters or adjusting the parameters of individual filters.

Can {Pause/Play} not be triggered by keyboard and mouse??

- Cut Screen; Preview; Please assign mouse middle button to [Pause/Play]
- Cut Screen; Preview; Please assign mouse Scroll Wheel to [Preview Volume Control]

FFplay is a simple player with poor controls.
Pause/Play is already occupied by the space bar, Volume control is not available.

[videoAI]

`ffplay` is a simple media player that is part of the FFmpeg suite. It is used to play multimedia files and streams. Below is a detailed description of the command syntax for `ffplay`.

FFplay command syntax generally follows this structure: ffplay [options] [input_url]. Options can include various parameters for controlling playback, such as -vf for video filters, -af for audio filters, and -i to specify the input file or stream.

### Basic Syntax

```sh
ffplay [options] input_file
```

### Options

`ffplay` supports a wide range of options that can be used to control its behavior. These options can be categorized into several groups:

#### Input Options

- `-i input_file`: Specify the input file or stream.
- `-f format`: Force the input or output format.
- `-re`: Read input at native frame rate. Mainly used for live streaming.

#### Output Options

- `-vf video_filter`: Set video filters.
- `-af audio_filter`: Set audio filters.
- `-f fmt`: Force the output format.
- `-ss position`: Seek to a given position in seconds.
- `-t duration`: Play `duration` seconds of the input.
- `-to time_stop`: Play until `time_stop`.
- `-vcodec codec`: Set the video codec.
- `-acodec codec`: Set the audio codec.

#### Display Options

- `-fs`: Force full screen.
- `-window_title title`: Set window title.
- `-vf scale=width:height`: Scale the video to the specified width and height.
- `-vf crop=width:height:x:y`: Crop the video to the specified dimensions and position.
- `-vf format=format`: Convert the video to the specified pixel format.
- `-vf drawtext=text='text':fontcolor=color`: Overlay text on the video.
- `-vf drawbox=x:y:w:h:color`: Draw a box on the video.
- `-vf drawgrid=w:h`: Draw a grid on the video.

#### Control Options

- `-autoexit`: Exit when the end of the file is reached.
- `-loop loop_count`: Loop the input file `loop_count` times.
- `-nodisp`: Disable video display.
- `-noborder`: Borderless window.
- `-showmode mode`: Set the display mode (e.g., `video`, `waveform`, `vectorscope`).
- `-framerate fps`: Set the frame rate.
- `-pix_fmt format`: Set the pixel format.
- `-v sync`: Set video sync method (e.g., `auto`, `passthrough`, `drop`, `dup`).
- `-a sync`: Set audio sync method (e.g., `auto`, `passthrough`, `drop`, `dup`).
- `-vsync vsync`: Set video sync method (e.g., `auto`, `passthrough`, `drop`, `dup`).
- `-ssf start_time`: Seek to a given start time.
- `-etf end_time`: Seek to a given end time.

#### Advanced Options

- `-loglevel level`: Set the logging level (e.g., `quiet`, `panic`, `fatal`, `error`, `warning`, `info`, `verbose`, `debug`, `trace`).
- `-stats`: Show detailed statistics.
- `-benchmark`: Show benchmarking information.
- `-benchmark_all`: Show benchmarking information for all components.
- `-vf "filter1,filter2,..."`: Apply multiple video filters.
- `-af "filter1,filter2,..."`: Apply multiple audio filters.

### Examples

1. **Play a video file**:
   ```sh
   ffplay input.mp4
   ```

2. **Play a video file with a specific start time**:
   ```sh
   ffplay -ss 30 input.mp4
   ```

3. **Play a video file with a specific duration**:
   ```sh
   ffplay -t 60 input.mp4
   ```

4. **Play a video file in full screen**:
   ```sh
   ffplay -fs input.mp4
   ```

5. **Play a video file with a specific window title**:
   ```sh
   ffplay -window_title "My Video" input.mp4
   ```

6. **Play a video file with a specific video filter**:
   ```sh
   ffplay -vf "scale=640:480" input.mp4
   ```

7. **Play a video file with a specific audio filter**:
   ```sh
   ffplay -af "volume=2" input.mp4
   ```

8. **Play a video file with a specific pixel format**:
   ```sh
   ffplay -pix_fmt yuv420p input.mp4
   ```

9. **Play a video file with a specific frame rate**:
   ```sh
   ffplay -framerate 30 input.mp4
   ```

10. **Play a video file with a specific video sync method**: