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ER Media ToolKit

Software By Professionals for Professionals

designed for AV professionals, Video Editors, film & video music composers, sound engineers and more.

This ToolKit is the fastest and must easiest way to replace audio in video (non-destructive), batch convert any video into Apple ProRes, DNxHD, DNxHR and AVC video aka H264 (MPEG-4 Part 10) and more.

"ER Media ToolKit" uses under the hood FFmpeg code with easy to use and user friendly GUI to easily create new media in a single Drag&Drop.


With "ER Media ToolKit" You can also add more audio streams in any selected video, separate audio and video streams, fix audio offset created by h264 videos with aac audio or wmv videos and other highly compressed media formats. you can extract audio as Wav 48khz 16/24 bit from any video doesn't matter if it is mono, stereo multichannel or surround sound and the same goes for replacing audio. 

"ER Media ToolKit" gives you the ability to constraint video frame rate, rotate videos clockwise or counterclockwise, create video from an image sequence and lots of other cool, fast and easy media handling essential for video editors, sound engineers and other media Pros.

Supported video formats:



Supported audio formats: 



Supported Image Sequence formats:

.tif .tiff .png .tga .exr .gif

Apple users:

To use ER Media ToolKit Apps under macOS you need to have FFmpeg installed on your system, unlike window the mac package cannot install it for you, therefore we provide you the simplest necessary steps to install FFmpeg on your OS X system.
Please make sure you read the included User guide for detailed installation instructions.


"ER Media ToolKit" is available for Windows 7, 8 & 10 (64 bit) and macOS 10.12 and above.

It works very smooth, fast and without any known bugs, if you find any bugs please report below so we can fix them.

This Software is a result of decades real life experience in audio to video production, video editing, long time R&D, coding, debugging, packaging etc. to make this tool's workflow smart, intuitive, fast and easy for AV professionals, music composers and more.

You are invited to download "ER Media ToolKit" latest version free of charge, work with it for as much as you like and we trust you'll find it helpful and honour us with a "small token of appreciation" to keep it alive.

Special thanks to all of you who already opened their pocket and pledged for the cause and to those who honour us with their valuable feedback, without you this tool would not have thrived to what it is Today.

Show and tell video

The Video covers the basic application features 

(26 minutes long)

Once you get the basics it should be fairly easy to learn the rest from the included User Guide.

This video was made using 1.2.45

Current ER Media ToolKit version


Contribute to ER Media ToolKit video conversion

Change Logs and Download links

(Last update: February 12 2019)

Please Subscribe below to get notified when a new updated version become available. 

Click here to download ER Media ToolKit latest Windows installer.

Note: If you have previous version installed just install the newer version over it. (no uninstall needed)

If this is your first time installing ER you may need to restart Windows after install to make the new environment variables take effect.

Click here for the macOS X latest package.

Just copy the content of this package (Four apps) into your Applications folder.

Note: If you have previous versions installed just replace/overwrite the older versions with the new one.

* Do the following to add "MediaER" as Post Process in Steinberg's "Export Audio Mixdown" Window:
Download this zip file
Copy the files: "OpenInMediaER.aepp" and "MediaER.png" from within the zip into:
/Library/Application Support/Steinberg/Audio Export Post Process Scripts
Launch your Steinberg's DAW and enjoy :)

Windows users get this as part of the windows installer, just enable it at the bottom of the "Export Audio Mixdown" Window in your Steinberg's DAW Post Process Tab.


Change Logs:

ER 1.4.54 change log

Bug fix:

  • All applications would let the user overwrite/destroy the original media if ‘Preserve Original File Name’ selected in settings window which would lead to irreversible loss - Fixed
  • MediaER application show "OutOfBoundsException" error message if updated directly from a very old version to recent version - Fixed
  • Progress percentage in some cases may show negative values - Fixed


  • macOS GUI adjustments and some gereral all around improvements.
  • Extract audio streams or separates Video and Audio streams from now being asked only once each session unless reset by choice with the new <Ctrl> + <Shift> + C hotkey or by clicking the ‘Extract Audio To Wav’ checkbox.
  • In case of application malfunction from now on the app attempts to send an error report via the OS default mail client (if any). In case you encounter such event Please press the SEND button to help us improve the app in the future.
  • MediaER Improved output video bitrate calculation according to video dimensions and selecte bitrate preset (Lower, Mail, Social media, etc.).

New features:

  • Added: Now all applications in the ToolKit support the new Dark Mode appearance preference in macOS Mojave and beyond. if not in dark mode one can change the app color scheme by using the new <Shift> + D hotkey to toggles between two available appearance modes: darker or lighter.
  • Added: "Close application when done" (or Shutdown computer), new CheckBox in the settings window - enables automatic application Quit (with 4 seconds delay), get activated only when all media creation processes are done. this check box can be selected (activated) even during process, so in case you see a process that is taking too long to end and expected to end long after you are no longer in front of the computer you can set it to automatically close the application (or the entire computer) when it is done. 
  • Added: 48,64,96 and 448 kbps audio bit rate support added to the Drop-down List in MediaER compressed audio options.
  • Added: When using the Replace audio procedure, In case you already selected PCM audio bit depth once, holding <Shift> key while dragging a new video in which you wish to replace the audio serves as bypass mechanism for audio bit depth Reselection.
  • Added: Social media dimensions and appropriate bitrates added to MediaER and Social media forced sizes in ProResER App. Note that those media dimensions can not apply in the other apps because Avid DNxHD, DNxHR, DVD and Blu Ray does not support non standard video dimensions.
  • Added: Invert first audio channel polarity, new CheckBox in MediaER settings window, Check this in case Left - Right Audio channels are 180 degree phase reversed.
  • Changed: User's unique Suffix is now preserved throughout the entire session unless reset or changed by the user at some point during the session, read more about it in the user guide (search for sub-section 17, under any application main window section).

---------- older versions:

ER 1.4.42 change log

Bug fix:

  • Apps in MacOS did not accept image sequences (file extension: .tif .tiff .png .tga .exr .gif) - Fixed


  • Auto fixing audio offset issues Improved algorithm, now introduces in-phase accuracy correction processing most popular mp4 'Advanced Audio/Video coding' (to max +48 sample offset, but never introduces negative results as you might have seen elsewhere...)  
  • Some gereral all around improvements, nothing special though.

New features:

  • Added: User Guide
  • Added: in MediaER, ProResER, DNxER - Deinterlace check box: Converts any interlaced input media into a non-interlaced form.

Clarification: deinterlacing may introduces some quality loss, but on the other hand if you convert interlaced media into progressive form without deinterlacing you might get jagged video output due to printing flipped odd/even fields order that cannot be corrected afterwards.


ER 1.4.38 change log

Note: this update introduces new Windows installer,  Because of the big changes it might be wiser to remove the previous version via Windows Control Panel Add/Remove Programs, then install with the installer from the .zip file, it designed to recognise and update older versions, just not always doing the best job at it.

Bug fix:

  • During app launch and loading user presets potential app crashing in very rare cases - Fixed
  • If both 'Video Rotation' and 'Force Size To -' are selected in certain situations output video would have wrong dimensions - Fixed


  • Improved error reporting and logging mechanism
  • Changed: In-app newer version detection and download mechanism.
  • Thinner progress-bar (Windows only)
  • All around GUI cosmetic changes.
  • FFmpeg Assets moved to 'Program Files' folder and are now get validated within the app via Absolute Windows Environment variable call (that been added to the new installer) and not being checked on a specific expected folder as before, which means that from now on you can actually move the FFmpeg assets virtually anywhere you choose as long as you point the Windows environment variable 'Path' to the correct path.
  • Windows installer now adds "MediaER" as Post Process in Steinberg's "Export Audio Mixdown" window so you can now export an audio from Steinberg's products and send it directly into MediaER with one click.
  • New Windows installer (Digitally Signed).
  • Some GUI text sizes adjustments, affects only Mac UHD screen users.

New features:

  • Added: Conform Video Frame Rate (another frame rate conversion method - Optional CheckBox in settings window)
  • Added: Link to ER Media ToolKit web page (by clicking bottom right audiospot Logo)
  • Added: 'Video Transport Stream' file extension .ts (TS files are often saved as multiple files on a DVD, i.e. "moviename1.ts,")

ER 1.4.27 change log

-  Major update for Mac users !  -

Bug fix:

  •  Some rare video properties cause the apps hard crashes, Fixed
  •  Only in MediaER app. small GUI text caption improvement and minor navigation bug fixes.


  • Brand new progress bar engine and algorithm, the previous one didn't work as expected under MacOS and had occasional glitches in Windows.
  • Various all around improvements.

New features:

  • Added: Check For Software Updates CheckBox (In all applications at the bottom of the setting window).
  • Added: In MediaER, ProResER and DNxER apps you can now preserve the original file names without the additional text after it. To enable this option go to Settings screen and check the new "Preserve Original File Name" checkbox.

1.4.16 change log

Bug fix:

  • Small GUI Bug fix (affected apps: DNxER, BRxDVD, ProResER)
  • In MediaER app the new "Add Audio Stream" option wrongly became the default action instead of   "Replace Audio" option - Fixed


New FFmpeg Engine

1.4.12 change log

Bug fix:

  • All around improvements and minor bug fixes.


  • Various GUI improvements.

New features:

  • Added extract multiple audio streams in MediaER app.
  • Added: In MediaER app you can now add your selected audio file as an additional stream to all existing audio streams by checking the new '+' sign (checkbox) that from now on will appear each time you press 'Replace Audio' radio button. (as always the audio stream format will be auto-adjusted to comply with the selected video container requirements)

ER 1.3.29 change log

Bug fix:

  •  In all flavors of the ToolKit minor bug fixes.


  •  Various GUI improvements including progress bar accuracy improvement.

New features:

  •  Under Windows the ToolKit supported so far only ASCII Character Set (on Mac OS there were no limitations) which meant when using the ToolKit on Windows: you could only work with files and folder trees ASCII characters formatted all the way through. we are glad to announce it is no longer the case, from this version forward the app's Windows version supports Unicode.
  •  Under macOS you can now use Mouse Wheel to scroll up and down above all listboxes. (in Windows version you could always do that, no change)
  •  Added new member to the ToolKit: BRxDVD for instant DVD and Blu-Ray media creation.
  •  Added: Create video from Image Sequence in all flavors of the ToolKit, just set target FPS (Image Sequence FPS) in settings window: 'Output video frame rate per second' and after that you can drop on the app the first image of the sequence. Note: sequence need to start at 0 and to be longer than 4 seconds, leading zeros are essential as well. example formatting: image_000.tif , supported image formats are - tif, png, tga, exr, gif

ER 1.3.22 change log

Bug fix:

  •  In all three versions of the app:
  •  Auto Audio Sync Fix got broken after last update while implanting Multi Audio Stream support, Fixed, you can now convert videos safely again, knowing the converter keep audio synchronisation.
  •  Anamorphic formating had unwanted behavior in some cases, Fixed.
  •  If a user chose LetterBoxing and Rotating input video in the same process/run the app would only Rotate the video without LetterBoxing the video, Fixed.


  •  Multi Audio Stream support further improvement.
  •  Replace audio in video algorithm improvement.
  •  Window installer/updater further improvement.

New features:

  •  All input media specifications reading and diagnostics before render begins rewritten completely to improve accuracy and speed resulting in ~400ms less pre-process diagnostics and better process applied due to better diagnostics accuracy.
  •  Added m2ts video support.
  •  In ProResER app, Added Interlaced/Progressive support (valid only when using 'Quality' mode combined with 'Force Size To'), for those who need to keep interlacing with their videos or to Fake interlaced media in progressive input by duplicating fields and flagging/tagging the output media as Interlaced.
  •  After adding Interlaced support the reasonable thing to do was to add support for TV formats - SD PAL (720x576) and SD NTSC (720x480) which are the most common users of Interlaced videos, so now you can force any input media into PAL TV and NTSC TV (consult drop down list tips for full options).

ER 1.3.17 change log

Major bug fixes:

  •  Window installer did not update previous installation correctly, it mistakenly recognized previous build as same build so users had to uninstall > reinstall in order to properly update version, sorry for that, Fixed.
  •  When clicking an item in the created media list (along with modifier keys), in certain cases could result in app crash, Fixed.
  •  In rare cases the progress bar could 'go nuts' do to incorect progress data from the encoder, Fixed.
  •  MediaER only, when using 'Fixed video mode' and 'Fixed audio mode' if not converting the video to H264 and using 'Replace Audio' the procedure for MOV / MXF extension was broken, Fixed.
  •  MediaER omly, M4P, M4V files were 'mistreated' by the system and in some cases reported Error 1 (incorrect audio), Fixed

New features:

  •  In the ProResER app, added processing priority toggle (Speed/Quality), the 'Speed' option based on a very high quality generic encoder that delivers quick results , the 'Quality' option is a much slower encoder that delivers YUV 10-bit colour depth on all ProRes profiles plus it register under both Mac and Windows 'apl1' the Apple vendor ID for ProRes encoding. Note that the 444 profile will always use the slower option even if you set the slider to speed because the faster encoder does not support Alpha channels.
  •  Added multiple audio streams support in ProResER and DNxER apps - the affected processes are: Extract Audio to Wav (both options) and all ProRes/DNxHD-HR conversion types that do not include replacing audio. Note, audio replacement will remove any existing audio streams from the video file.
  •  In MediaER app, added option to use any video as your audio replacement in another video file, just drag any video onto the main app window while holding ctrl+shift and you'll see the droped video appear in the audio replacement position, now you can drop the second video as you normally would and MediaER automatically starts incorporating the audio from the first video with the picture from the second video.


For Any Question or Request Please Contact Us

ER Media ToolKit Query:

audio spot


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