- Add Audio streams by clicking the ‘Add Audio Stream’ button (right pane).

- Click on the audio ‘Edit' button to show the audio options screen.

Click on the 'Add Subtitle' button in the right hand panel. Choose whether you want a soft subtitle or to hard burn subtitle.

Soft subtitles have the advantage that you can add multiple languages. You can also turn them off when desired.

Hardburned subtitles are rendered on top of the video stream. They offer more options to change font, size, background box, position, …
Disadvantages are that you only have 1 subtitles and you cannot turn it off.

- Click the "Add Overlay" button (right pane) and select the "Overlay" filter.

Click the "Add Image/Movie" button and choose an image or video file.

- Positioning and resizing the watermark can be done simply by dragging across the screen and using the 4 corners.

Note: You can add as many Overlay filters as you need.

- Click on the ‘disc’ button to save as a user preset.

With dropzones you can easily convert to several presets in one go.
Click on ‘Add+’ to create a dropzone. Then select to which presets you want to encode.
Then drag’n’drop the media file(s) onto the dropzone.

- Add the files whose data you want to compare.
- Click on the ‘Show Media Information’.
- Use the search field to filter text.

To extend the functionality of ffWorks so that you can also edit/convert media files, you need an FFmpeg file.

You can compile FFmpeg yourself. There are several tutorials or scripts available online. You can also download ready compiled versions or use Homebrew or Macports to compile your own version.
Once you have a working FFmpeg file, you can install it for ffWorks using the FFmpeg Manager.

To open the FFmpeg Manager, click on the FFmpeg logo button in the Toolbar.

Click on the + sign in the lower left corner to add a FFmpeg file. The import ffmpeg window will be shown.

If you have compiled FFmpeg with Homebrew or MacPorts, choose the corresponding button.

The image files must have a file name that includes consecutive numbering.
Example: image000001.png, image000002.png, …

 - Drag’n'drop one such image file into ffWorks. Note: It doesn’t matter which file you add.
 - Select to which container/format you want to encode.
 - Click on the ‘Images to Movie’ toolbar button. The 'Convert Images to Movie' window will be shown.
 - Click on the ’Start’ button to start’.

Click on the Toolbar button ‘MovieToImages’ to open the 'Movie to Images' window.

Exporting is possible to PNG, JPG, BMP, TIFF, DPX, SGI and TGA.

The wizard can help you select video, audio and subtitles.
It also helps you check whether the audio and/or video streams are compatible with the chosen file format to easily copy them without re-encoding  without loss of quality (passthru).

- By default the wizard is shown when you add media files to ffWorks. You can disable this in the Preferences when needed.
- You can always access the wizard's help by clicking the 'wizard' button. 

- Click on the ‘Continue’ button to use the Wizard settings. If you want to ignore the Wizard settings, click on the ‘Skip’ button.

Note: It is possible to add all available audio and/or subtitles when selecting ‘all’ in the drop down menus.
Note: If the passthru options are greyed out means the selected file format cannot hold them. In that case you need to re-encode or choose another file format. 

With the Merge audio filter you can asign embeded or external audio files to create one audio stream.
For example if you have 6 mono audio files and you need to map them to one 5.1 audio stream.

 - Add the Merge audio filter in the right pane.
 - Choose to map embeded audio streams or external audio files.
 - Then choose the embeded audio streams or select the external audio files.

Below a screenshot of the Merge audio edit window when you need to create a 5.1 audio stream from 6 external mono audio files.
You can use the same method for embedded audio streams.

ffWorks has several de-interlace video filters that let you convert interlaced content to progresive content.
If you have no experience with de-interlacing, it is best to choose the Yadif filter (Yet Another De-Interlace Filter). This simple filter does its job very well and delivers very good quality without changing the options.

Click on the ‘trimming’ button in the top/right pane.

Trim the start and/or end positions with the slider.
If needed, trimming can be done at framelevel using the time selector.

Note: enable video and audio passthru when you do not want to re-encode.

ffWorks offers two ways to render timecode, frame number and frame type.
With the "Render Timecode" video filter, you can render the Timecode, Framenumber and Frame Type.

With the "Draw Text" video filter it is possible to render the Timestamps.

Click on the Crop button in the right/top plane to add the cropping feature.

By default the cropping mode is set to ‘Manual Cropping’. With this mode you can size the croping area manually using the 4 corners.

With the Mode selector, you can choose to auto detect black borders or auto cropping to 4:3 or 16:9

Creating a movie from one image file and one audio file is very simple. For example to upload to Youtube.

- Drag’n’drop the image file into the ffWorks window.
- Choose which file format you want to create. For example MP4
- Add an audio stream in the right pane. (Click on the +Add Audio button).

The Quality Metrics feature allows you to compare two video sources. 

You can access this option in two ways:
- By clicking on the toolbar button 'Video Quality Metrics'.
- By clicking on the 'Video Quality Metrics' button in the batch view.
With the latter option, the original source and converted source will be automatically added in the relevant text fields.

The powerful Color Adjustment feature lets you easy fine tune images using Exposure, Contrast, Saturation, Vibrance, Gamma, Black/White balance and many more.
Note: There are +80 Pro LUT presets included. If you want to use your own LUT (.cube) files, you need to add the 3D LUT video filter in the right pane.

ffWorks offers two ways to convert HDR content to SDR.

1) Use te Color Adjustments feature.
Set the ‘Apply LUT Preset’ to HDR-to-HDR

2) Use the 3DLUT video filter.
Add the filter in the right pane and set the LUT to HDR-to-SDR.

ffWorks offers several ways to normalise audio.

1) Enable ‘Perform audio peak normalisation’ in the Audio options.

2) Use the Dynamic Normaliser audio filter.
You can add this in right pane (Audio Filters).

3) Use the Loudness Normaliser audio filter.
You can add this in right pane (Audio Filters).

4) Use the EBU R128  audio filter.
You can add this in right pane (Audio Filters).

FFmpeg has many video and audio filters that you can use in ffWorks.

Click the 'Add filter' button in the right-hand pane and select your choice from the drop-down menu.

Merging/concatenating media files into one media file is very easy.
Add as many media files as you wish and click the Merge button (chain icon) on the toolbar.

In this example, there are 4 media files with a video size of 3840x2160 and 30FPS.

Note: If all media files have the same video size and FPS, Merge Mode is automatically set to 'No re-encode (Concat passthru)'.
This ensures that the quality remains the same and the process will be very fast.
If the size and/or FPS differ between media files, re-encoding is required.

By default, the same file format is used as the original media files, but you can change this by disabling 'Same format as source file' and choosing the format you need.
Click the "Start" button to start the merge process.