This guide will outline some best practices for using video in your SlideRocket presentation. Performance of any assets in SlideRocket depend on many factors, such as: type/size of monitor, overall size of the presentation, viewer connection speed, number and size of assets on the slides and within the presentations. 

• Dimensions: 800x600 or 1024x768 is best when viewing on standard monitor. If presentation will be broadcast on large screen, higher resolution video can be used
• Bitrate: Depends on dimensions and video codec. For H.264, it is generally 1000-3000 kbps. The lower the bit rate, the more compressed the video. This means that quality will be lower, but that file size will be smaller
• Frame Rate: Dependent on source used to create video and should remain unchanged from source file. Do not use variable frame rate 
• Encoding: .FLV and .MP4 video files are supported in their native format. Pro level customers can have other video formats encoded into .MP4 on upload

 

File size

All of the factors above combine to create an overall file size, so there is no standard file size that is recommended. 

• SlideRocket does not accept individual files that are larger than 200MB and any single video more than 70MB will cause slower downloading time for viewer 
• For optimal results, select only 1 video per slide

 

Downloading

SlideRocket downloads locally each time it plays, rather than streaming, so there is no particular connection speed that is best. 

• Larger videos and larger presentations will take longer to download on viewers’ computers 
• For enhanced online playback, play presentation and video all the way through then leave browser open prior to presenting

 

MPEG-4 Files

MPEG-4 files contain metadata, including dimensions and length of video, in a "moov" atom. 

• SlideRocket requires setting "moov" atom at beginning of file for best results. This allows for your video to play while it is downloading

• Some video tools put "moov" atom at end of file. In these cases, the video player does not have information it needs to start playing video until entire video has been downloaded. Due to performance impact this can have within SlideRocket, it is recommended to move “moov” atom to front of file using the setting called "progressive download," "streaming mode," or "fast start" 

 

ADVANCED NOTE: For more technical information about this feature click here