Prepare Media

PIX recommends preparing clipsimages, and audio files to the specifications below. This ensures that your media loads quickly and plays back smoothly for others.

Prepare clips.

PIX uses QuickTime H.264 video for playback. H.264 provides extremely efficient compression. You get a very high quality viewing experience for a relatively small file size. This efficiency is important for network-based viewing, especially for people with slower Internet connections.

Prepare high-definition clips.

When preparing clips for your screening room or other high-resolution screening environments, you have the option of encoding the clips with a higher bitrate (up to 10,000 kbps) for 1920 x 1080 material. Clips encoded to our standard specifications will also play in this screening environment.


Clip Format Details


Standard Screening Room
Video QuickTime H.264, wrapped in QuickTime's .mov container
Audio Low Complexity/"LC" AAC Audio
(MPEG-4 Part 3 Advanced Audio)
Low Complexity/"LC" AAC Audio
(MPEG-4 Part 3 Advanced Audio)
  Note: This often appears as the "AAC" or "MPEG-4 AAC" option.
Other variants (Low Delay or High Efficiency) are not supported.
Progressive Streaming Fast Start
Frames Per Second 23.98 or same as source
Frame Size 1280 x 720 1920 x 1080
Data Rate 2,400 kbps 10,000 kbps
Audio Data Rate 128 kbps 192 kbps
Audio Sample Rate 44.1 kHz or 48 kHz 48 kHz
Audio Tracks Stereo or Mixed Mono Stereo or Mixed Mono

Fast Start

Clips must include the Fast Start flag. With this flag, clips play back while​ they load. Without this flag, viewers must wait for the entire clip to load before the clip will play back. Clips without the Fast Start flag may not play back with PIX watermarking or DRM.


A reel of dailies should not be uploaded as a single file, but rather as individual files (one per take). This provides the best experience for viewers and allows them to reassemble their own reels of selects.

If the files are being exported from Avid, it's worth noting that there is a known bug in Avid that causes files to be created without the Fast Start header -- even when Fast Start is properly selected. If this occurs, QuickTime Pro or MPEG Streamclip (a free program available at www.squared5.com) can add Fast Start with a simple "Save As..." -- no need to re-encode. 

If the files are being exported from Premiere, note that Adobe no longer supports H.264 Mov files. Use Adobe Media Encoder to export an H.264 MP4 as per PIX's specs. Then open the MP4 in MPEG Streamclip, and select File > "Save as..." MOV file. Note that Fast Start will be added during this save.



  • One track of video.
  • No more than one track of audio.
  • No text tracks.

Prepare images.

We recommend creating images in the following formats.

  • JPEG (.jpg, .jpeg)
  • BMP (.bmp)
  • TIFF (.tif, .tiff)
  • PNG (.png)
  • GIF (.gif)

We recommend keeping image sizes below 5000 x 5000 pixels.  There is a size limit of 500MB or 100 megapixels (ex: 10,000 x 10,000).  Images that exceed this limit cannot be viewed in PIX, are not watermarked, and do not have preview thumbnails.

We also recommend using RGB color for your images. However, Gray, Index, and Lab are also supported. If you post images with CMYK color, it may affect the color of the overlaying watermark.

Note: We do not yet support viewing JPEG-2000 images (.jp2, .jpf), raw camera images, or layered and vector images like Photoshop (.psd) and Adobe Illustrator (.ai). You can post these files for others to download, but these files will not display in PIX.

Prepare audio files.

We recommend creating AAC audio files. We also support WAV, AIFF, BWF, SND, MP3, MP4, M4A, and AU files.

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