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General Exchange Format

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Title: General Exchange Format  
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Subject: Digital container format, Broadcast engineering, AAC-LD, Dynamic Resolution Adaptation, MPEG-4 SL
Collection: Broadcast Engineering, Computer File Formats, Film and Video Technology, Standards
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General Exchange Format

General Exchange Format
Filename extension .gxf
Internet media type application/gxf
Type code "gxf "
Initial release 2001 (2001)
Type of format Container format
Container for audiovisual material

General eXchange Format (GXF), is a file exchange format for the transfer of simple and compound clips between television program storage systems. It is a container format that can contain Motion JPEG (M-JPEG), MPEG, or DV-based video compression standards, with associated audio, time code, and user data that may include user-defined metadata.

Originally GXF was developed by Grass Valley Group, then standardized by SMPTE as SMPTE 360M,[1] and was extended in SMPTE RDD 14-2007[2] to include high-definition video resolutions.

GXF has a fairly simple data model compared with SMPTE MXF container format since it should be used for file transfers and not as a storage format with no editing capabilities.[3] SMPTE RDD 14-2007 is only 57 pages long, compared with many hundreds of pages for the MXF standards.

Contents

  • Applications and tools 1
    • Applications 1.1
    • Parser and checker 1.2
    • Tools 1.3
  • References 2
  • External links 3

Applications and tools

Applications

  • The FFmpeg multimedia converter and VLC media player free video player support GXF;
  • theScribe LITE is an GXF player that also supports MXF.

Parser and checker

  • Grassvalley offers a win32 based tool "tstream", for parsing GXF files and checking to ensure the contents conform to spec.

Tools

  • GXF::SDK is a C++ [SDK] that implements the GXF standard to ease the reading, creation, sub-clipping, merge and rewrap of GXF files. It supports: MPEG video, DV, PCM, AC3 and Dolby E audio, Timecode, AFD, VBI and ANC;
  • GXFDShowFilter is a DirectShow filter that enables Windows MediaPlayer and other DirectShow based applications to play back GXF files.

References

  1. ^ SMPTE 360M
  2. ^ SMPTE RDD 14-2007
  3. ^ File interchange formats

External links

  • GXF - The General eXchange Format EBU Technical Review, July 2002.
  • GXF, MXF and AAF comparison by Brad Gilmer.
  • GXF tools by MOG Solutions.
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