Problems & Troubleshooting

Please also see the Questions & Answers, Edition Differences, and Technical Information sections for more information.

Bug Reports

If you encounter a problem that is not covered by the documentation, and you believe it is a bug or glitch in this software, please submit a bug report so that it can be investigated.

Bug reports should be submitted at http://RaceRender.com/BugReport.html

If you have a file attachment to include, it can be e-mailed to Bugs@RaceRender.com

Please be detailed and include the following information:
  • If you can get RaceRender's diagnostic log immediately after the problem occurred, please attach or copy & paste it into to your e-mail
    (can be viewed by running the "Log Viewer" tool, or going to RaceRender's Help menu and selecting "Show Diagnostic Log")
  • The version number of RaceRender that you are using, and if it's the Free, Deluxe, or Ultimate edition
  • Which version of Windows or Mac OS X you are using
  • What kind of computer you are using
  • Any error messages and/or codes displayed
  • Which steps you took before you encountered the problem
  • The types of media files you were using when the problem occurred (MPEG-4, H.264, Windows Media, QuickTime, AVI, MP3, etc.)
  • Any other relevant information that could help reproduce the problem on another system

Common Problems and Error Messages
  • The template menu selections are all black and do not have any text - This can occur when RaceRender is run on a user account that has reduced privileges. The cause is simply that the template and style files are installed under the "My Documents" folder of the user who installed the software. Being that installation requires administrative privileges, it ends up being installed into the admin or primary user account. The best way to solve this is to make a copy of the "RaceRender" sub-folder from the administrator's "My Documents" folder into the desired user's "My Documents" folder. On Windows 7, both can be accessed from under the C:\Users folder. However, a quick and easy workaround is to just launch RaceRender as the administrative user (right-click and select "Run as administrator").

  • "Unrecognized or unsupported file format" Error - The file you are attempting to use is not a recognized or compatible file format. Please see the list of Supported Input File Formats, and convert the file into a supported format. For better compatibility for Windows users, it is recommended that your system have Apple QuickTime 7 installed. If you are attempting to add a datalogger file, please see How To Add a Datalogger Overlay

  • No video and/or no sound from media in a supported format - Your system most likely does not have a suitable video or audio codec installed for RaceRender to use to decode your media file.

    Windows users may have better results if you install the latest versions of Apple QuickTime and Microsoft Windows Media Player. Some codec problems, especially with AVI files, may go away after installing the "ffdshow tryouts" codec package with the "VFW Interface" option enabled. If you are still unable to resolve the problem, you may have better results using a different supported format, such as MPEG-4 / H.264. If you use the AVI file type, it can also help to encode the audio in PCM or MS-ADPCM format. See Also: "Which file formats work best?"

  • AVI file stops playing before the end of the file (Windows version) - In some cases, AVI files that are larger than 1 GB may not play after the 1 GB point. This occurs when the Video For Windows interface is being used to decode the AVI file, and therefore may not apply to all AVI files or codecs. This can be avoided by encoding the video in a different supported format, or compressing it to make it smaller. However, if you already have an AVI file that is affected by the issue, a relatively quick and simple solution can be to use an AVI file splitter utility to split it up into files that are less than 1 GB each, then use RaceRender's Input File Join functionality to make them work as one continuous input file.

  • Popping or other glitches in AVI audio - Some AVI files may have occasional popping and/or other glitches in the audio, depending on which audio codec was used and how the file was encoded. This may not be noticeable in motorsports footage due to the typical engine and wind noise present, but can be an issue for music and dialog. It also tends to be more apparent when playing a preview, rather than when creating an output video file. If this is causing you problems, you should have better results using a different supported format, such as MPEG-4 / H.264. If you still use the AVI file type, the PCM or MS-ADPCM audio formats should work better. You may also find that changing the preview or output video's audio rate can lessen the effect. See Also: "Which file formats work best?"

  • AVI files in general - Audio Video Interleave (AVI) was once a very widely used and compatible container format, but it is now over 20 years old and has seen a variety of extensions and hacks to make it do things that it was not designed to do. Therefore, it is difficult and inefficient to fully support. This is a problem that affects most video applications. The complications are due to several different format variations and improperly supported codecs in use, as well as continually diminishing or changing support for it in Microsoft Windows.

    RaceRender for Windows implements several approaches to attempt to provide a reasonable level of compatibility with AVI input files, but there may still be some that don't work 100%. If you are using AVI files, it is recommended that you use files encoded with well-known video codecs, such as Xvid or DivX, and PCM or ADPCM encoding for the audio. You will usually need to have compatible VfW (Video for Windows) and DirectShow codecs installed on your system. RaceRender's AVI file output option uses the Microsoft Video for Windows interface and is therefore limited to 720x480 maximum and may have other limitations.

  • Problems with H.264 video - Although most MPEG-4 H.264 video works very well with RaceRender, it has been observed that a small number of products produce "H.264" video that doesn't seem to be quite right, and does not function properly in RaceRender. In those cases, they often also fail to play properly in Apple's QuickTime Player or Windows Media Player. Windows users should have the best results on Windows 8 or newer. On older versions of Windows, it may help to install the latest version of QuickTime for Windows on your system.

  • "Not Authorized" / "This application cannot be used to play this content" Message - You are attempting to use DRM-protected media. RaceRender can use unrestricted M4A files, but not its DRM-protected counterpart, M4P.

  • MPEG-1 media does not play sound - MPEG-1 should work in RaceRender for Mac OS X, but it is not an officially supported format in the Windows version. It may still work with RaceRender if you have Apple's QuickTime Player for Windows installed, but likely without sound and the results may not be optimal. For better compatibility, convert the file into a supported format, such as MPEG-4 / H.264. See Also: "Which file formats work best?"

  • Problems with MPEG-2 media - MPEG-2 should work in RaceRender for Mac OS X, but it is not an officially supported format in the Windows version. If you have Apple's QuickTime Player for Windows installed with their MPEG-2 Playback Component, it may be possible to get video, but likely without sound and the results may not be optimal. For better compatibility, convert the file into a supported format, such as MPEG-4 / H.264. See Also: "Which file formats work best?"

  • Problems with AVCHD inside .MTS or .M2TS file - MTS represents MPEG Transport Stream, which can work with RaceRender on Windows 8 and newer, but likely will not work on Windows 7 or earlier, or on Mac OS X. For better compatibility, convert the file into a supported format, such as MPEG-4 / H.264. See Also: "Which file formats work best?"

  • Preview screens sometimes turn black (Windows) - This is a screen painting glitch that is more likely to affect slower computers, and Windows XP in particular. In some cases, you can manually invoke a refresh by pressing the F5 key. Alternatively, dragging the window off the screen and back can also work.

Improving Performance

The performance and system requirements of this product are largely dependent on the codecs and bitrates of the media files that you use, however you do have some choices that can improve performance:
  • Use the MPEG-4 H.264 file type option when using RaceRender to create video files. The H.264 encoder is often much faster than Windows Media or AVI, so it should be used whenever practical.

  • Resist the temptation to use the highest picture size, frame rate, or rescale quality settings available, unless you determine that you really need that. RaceRender offers many powerful options, but those will push the limits of a powerful computer, and there are diminishing returns (relative to cost) with the highest settings. Most users can achieve great output quality and faster processing times by using slightly more modest settings. 1080p60 and maximum quality sounds great, but to the casual viewer, a 720p30, or especially 960p30, video encoded with the "Better" picture rescale quality will often be virtually indistinguishable, while the 1080p60 version can take more than four times as much computing time to render each frame. Keep in mind that video upload websites often reduce the quality further, and many do not make full use of a 1080p or 60 FPS render. Also, when recording your video footage, you may find that 30 FPS gives you a brighter picture with better colors than the 60 FPS mode, depending on your camera. See Also: Performance Chart

  • Reduce the picture size. Although the rendering core is fast, and most of your CPU time is going to the video codecs, you can still reduce the amount of work that it has to do. For example, a 512x384 picture has 36% less pixels to render and draw than 640x480, and a 720p picture has 56% less pixels than 1080p. When creating a video file, this also affects the speed of video encoding. See Also: Performance Chart

  • Lower the picture rescale quality. For creating a video file, the "Better" or "Good" quality settings are recommended. Most users will not see a noticeable benefit from the "Maximum" setting, as it is more for special cases that need a higher level of precision. Try more modest settings and see how they look. Lower settings reduce the amount of work that the rendering core has to do, but may sometimes cause parts of the image to appear jagged or too sharp. It is recommended to use a low quality setting for the preview and any draft videos that you create, and then use a medium to high setting when creating the final output video.

  • Mute the preview audio. Preview rendering performance can be improved if it doesn't have to process the audio.

  • Make use of your internal hard drive. File access may be significantly slower on other drives, such as: memory cards, thumb drives, network shares, cloud drives / folders, optical media, and external drives. Copy the video files to your computer's hard drive, and then use those copies with RaceRender. Using files directly from a memory card, or other removable or remote media, might result in very poor performance and long lags.

  • Turn off the "Data Number" display on gauge display objects that your project is using. Dynamic text rendering comes at a higher performance cost than most other elements. However, static text, such as gauge background labels and regular text display objects, are able to be rendered efficiently, and are therefore unaffected by this.

  • If a display object or input file is not being displayed (or is hidden behind other media), un-check the display object's "Active" checkbox until you want it to be visible. Or, if you only want to hear its audio (and not see its video), use an "Audio Only" display object instead. These approaches can reduce or eliminate much of the work that your computer has to do. However, this is not needed if the input file has simply reached the end of its playback.

  • Turn off the "High Resolution" option on display objects that offer it. Although these objects tend to render quickly, the high resolution mode comes at a higher performance cost because it typically involves four times as many pixels, and it uses high quality scaling. You can also override the high quality scaling portion of this by setting the overall picture rescale quality to "Minimal".

  • Windows users: Use Windows 8 / 8.1, or at least Windows 7. Media decoding and encoding tends to be faster on Windows 7, 8, and 8.1 due to improvements in Microsoft Media Foundation.


  • Picture Size vs Performance Cost
    Number of Pixels Processed per Second. 480p30 is DVD-quality.
    (additional codec processing times vary)