You create a proxy file by using video editing software, eg QuickTime Pro, Windows Movie Maker, Final Cut Pro or Avid Premiere. There is a lot of information to search on “video converters” on the Internet. Clicking on the export preset for eg, “mobile device”, “web streaming video” or “iPod Quality” will create a proxy file which can be used for closed captioning. We recommend QuickTime (.mp4, .mov): If available, click on “iPod” present or 320×240, H.264 or MPEG-4 codec 500kbps or AAC audio 128kbps. IMPORTANT: Ensure not to convert the video file to a lower frame rate as this may affect the timing of the captions. The original frame rate of the video has to be kept.
Posted in: Online Video Closed Captioning Services