When multiple audio or video tracks are present, our encoder has no way of knowing which track was intended for playback, so it will select one at random. For 5.1 or spatial audio, we’ll downmix to stereo for you, though we recommend performing this action before upload. Audio specifically should contain two channels of stereo audio. camproj )Īll videos should be uploaded with a single video and audio track. Here are some examples of file types we do not support for upload or conversion: All files must contain a valid video track (even if it only contains a black slate or still image). We support a wide range of video and audio codecs, but we recommend following our compression guidelines to avoid complications. Be sure to uncheck any options for an anamorphic video. If your video is being displayed with an unexpected aspect ratio (for example, an HD 16:9 video displaying as SD 4:3) check the export settings within your editor. Non-square pixelsĪll videos are converted to square pixels for playback over the web. If your editing software does not offer these customizations, we recommend using Handbrake to re-encode. Be sure to always set a constant frame rate in your editing software. Variable frame rates can also lead to playback issues after conversion, such as audio sync discrepancies. Depending on the level of variation, variable frame rates can cause certain videos to fail conversion. Variable frame rateĪll videos are converted to a constant frame rate on Vimeo.

If you don’t have access to the original software, you can use a free program like Handbrake to re-encode your video file, which should hopefully remove any corruption from your audio or video track. We recommend following our compression guidelines for the best results. If you still see a conversion error, try re-exporting your video from the program you used to create it. If the file plays all the way to the end without issue, try re-uploading to Vimeo one more time. Note: We recommend viewing instead of spot-checking, as corruption may only be present in certain parts of your video. To test for corruption, try playing your file in another video player, such as Quicktime or VLC.

Corruption can be introduced on your hard drive or anywhere along the production process (shooting, editing, exporting). If your video is failing to convert or is unable to play for the entire duration, it’s likely that your source file contains corruption. If you’ve successfully uploaded a video, but you’ve run into an issue before or during conversion, there may be a problem with your source file.

Realplayer converter not working