Using HD Link to Rewrap and Convert Infinity J2K-MXF Media (Windows)

 
I-J2K Suite (Windows) Summary

For editing: Converts 10-bit Infinity J2K files to 10-bit CineForm Intermediate AVI or MOV files
   - converted files retain spatial resolution and frame rate of source files
   - converted AVI files are compatible with all DirectShow Windows applications
   - converted MOV files are compatible with all QuickTime applications on Windows or Mac

For shot review: Rewraps Infinity J2K files to CineForm J2K (C-J2K) files with an AVI wrapper
   - rapidly copies Infinity MXF files to a new AVI-wrapped J2K file compatible with Windows Media Player and other
     DirectShow applications

Prospect HD/4K or Neo HD/4K must be installed on Windows prior to installing I-J2K Suite

NOTE: HD Link includes the Trial version of I-J2K Suite for converting Infinity media.  All converted media will have a watermark until the non-watermark version of I-J2K Suite is purchased and installed. I-J2K Suite can be purchased from the CineForm online store.

 

INTRODUCTION

 
CineForm's HD Link (included with Prospect and Neo) Rewraps and Converts Infinity J2K-MXF Media

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I-J2K Suite enables two features -– conversion and re-wrapping -– to support Infinity's J2K-MXF content. 

• "Conversion" transcodes Infinity's 10-bit J2K format into 10-bit CineForm Intermediate AVI files of the same spatial resolution in preparation for editing. 

 • "Rewrapping" replaces the MXF wrapper surrounding the Infinity MXF files with an  AVI wrapper.  Rewrapped AVI files, even though they contain J2K video essence, will now play in Windows Media Player or other DirectShow applications.  Rewrapping creates a new AVI file at the location specified and leaves the source file intact.  Rewrapping is very fast - about the speed of a file copy, and is a great technique to use for shot review.

Editing: For best editing performance it is recommended that you transcode Infinity J2K files to CineForm Intermediate files.  Your new CineForm files will become your new digital master source for your online workflow.  File conversion is performed prior to beginning post-production by running CineForm's HD Link*.  After conversion you'll have a a real-time workflow within Adobe Premiere Pro on Windows plus compatibility with all DirectShow applications.  The original J2K-MXF files can then be stored for archive. 

*Note: HD Link ships with a fully-functional Trial version of I-J2K Suite.  Converted files will contain a watermark until the non-watermark version is purchased and installed.

Shot Review: In a production environment that requires quick review of material, we recommend re-wrapping J2K-MXF media into CineForm J2K (C-J2K) AVI files.  Re-wrapping is very fast (faster than real time) as it doesn't disturb the underlying J2K compression.  After re-wrapping, all DirectShow-compatible Windows applications can decode the C-J2K files when I-J2K Suite is installed, with performance dependent on your hardware.

NOTE: Prospect HD/4K or Neo HD/4K must be installed on Windows prior to using I-J2K Suite

CineForm Visual Fidelity: Transcoding J2K-MXF media to CineForm Intermediate files is extremely high quality with no loss of visual fidelity. For more information about CineForm compression quality, see our Quality Analysis pages.

 

WINDOWS Workflow for I-J2K Suite

 

Step 1a - EDITING: Convert J2K-MXF Files to CineForm Intermediate AVI or MOV 

 

 

As is consistent with a CineForm post-production workflow, the first step is to convert source material into CineForm Intermediate files using HDLink.   This remains the case for Infinity's J2K-MXF content.  HD Link makes quick work of converting Infinity J2K-MXF files as outlined below. 

First, select your desired settings in HDLink by opening the “Prefs” window.

HDLink Infinity

a) Select the directory where you want the converted files to be placed. Make sure to check the “Use Capture Location for converted files” box. (Highlighted in red). 

b)  Set “Convert to CFHD” in the Infinity Controls window (Highlighted in green).  Also select whether or not you want your clip chunks concatenated¹ at the time of conversion.

c) Choose your desired destination format (AVI or MOV), quality, and image processing settings.  (Highlighted in blue). Normally you will choose AVI if you intend to use the converted files on Windows and MOV if you intend to use them on Mac.

NOTE: The conversion source can be the REVPRO or CF media used to record Infinity files.  You do NOT need to copy J2K-MXF media from the REVPRO or CF media prior to conversion. 

¹ Concatenation: The Infinity camera allows recordings to be automatically broken at user-specified time or file size intervals.  When selected, you may end up with multiple “chunks” for every clip.  With the “Concatenate Chunks” option enabled, your resulting CineForm file will compile all of the chunks back into one clip.  With the option disabled, you will get one CineForm file for every source chunk.  This option also impacts how the “Select Folder” function works in the “Convert” tab.  More on that in the following section…

Jump to Step 2....
 

Step 1b - SHOT REVIEW: Rewrapping J2K-MXF Files to J2K-AVI

 

Rewrapping J2K-MXF files through HD Link allows clips to be rapidly converted into a format for shot review and selection.  Rewrapping preserves the underlying J2K compression, but replaces the MXF wrapper with an AVI wrapper, allowing playback using Windows Media Player or other DirectShow-compatible viewers.

The Rewrap process is performed by HD Link with I-J2K Suite installed using the settings shown in the “Prefs” window.

HDLink Infinity 2

a) Select where you want your re-wrapped files to be stored. Make sure to enable the “Use Capture Location for converted files” checkbox. (Red) 

b) Select “Re-wrap to CJ2K” in the Infinity Controls box.  You also have the option to concatenate¹ the clip chunks during re-wrap. (Green)

Playback performance will be largely dependent upon your hardware. 

NOTE: The conversion source can a mounted disk including the REVPRO or CF media used to record Infinity files.  You do NOT need to copy J2K-MXF media from the REVPRO or CF media prior to conversion. 

¹ Concatenation: The Infinity camera allows recordings to be automatically broken at user-specified time or file size intervals.  When selected, you may end up with multiple “chunks” for every clip.  With the “Concatenate Chunks” option ENABLED, your resulting CineForm file will compile all of the chunks back into one clip.  With the option DISABLED, you will get one CineForm file for every source chunk.  This option also impacts how the “Select Folder” function works in the “Convert” tab.  More on that in the following section…

Continue to Step 2....

 

Step 2 - HD Link Convert Tab

Once you have specified your desired function (Conversion or Rewrapping) and the corresponding settings, you will now select the files that you wish to convert.

First, select the Convert tab in HD Link.

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Step 3 - File Selection for Batch Conversion

The next step is to select your source file(s) - there are two ways to do this.

a) The “Select Files” function will allow you to select individual files to convert or rewrap.  Use this when there are specific clips or chunks you wish to process.

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b) The “Select Folder” operation should be used when you wish to process an entire (nested) directory or drive.  Simply select the top-most directory, and all of the clips will be recursively added to the conversion queue.

selectfolder5

NOTE: The “Concatenate Chunks” option affects the behavior of “Select Folder”.  When ENABLED, only the first chunk of each clip will added to the “SourceClips” queue in HDLink’s “Convert” tab.  The subsequent chunks will automatically be concatenated.  When “Concatenate Chunks” is DISABLED, every chunk will be added to the queue.  When using “Select Files”, only select the first chunk of each file if you wish to concatenate.  If you want to only convert/re-wrap individual chunks, disable the “Concatenate Chunks” option.


c) Once you have all the clips you wish to convert added to the queue, click “Start”.  Just like with any other HDLink conversion, you will see the completed conversions and re-wraps added to the “Converted Clips” list, with corresponding file sizes.  The progress bar will also accurately represent how much of any given chunk (or clip) has been completed. 

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NOTE: For correct frame rate information to be recorded into your resulting files, and for accurate progress reporting, the file and naming structure from your source RevPro disk MUST remain unaltered.  Specifically, the corresponding XML file(s) for each clip must be preserved in the same directory as the clips.

d) Once processing is complete, you can play your converted or re-wrapped files in Windows Media Player  or your player of choice if I-J2K Suite is installed.  Your converted files are ready to be edited in real-time within your editor of choice. 

 

 
Accelerating Playback Performance of J2K-AVI Files

Wavelet algorithms - both CineForm and J2K - have an interesting property that allows you to play back the file at full resolution, or at selected sub-resolutions such as "half" (half horizontal and vertical resolution), or "quarter" (quarter horizontal and vertical resolution).  Sub resolutions require less CPU horsepower for playback, thus increasing the frame rate of playback.
To accelerate playback performance of J2K-AVI files, CineForm offers three playback commands for the decoder that define the spatial resolution the file shall be decoded to.

These commands are located in Start Menu --> CineForm --> IJ2K Tools and are called

J2K Playback - Full Quality (highest resolution, lowest frame rate playback)
J2K Playback - Half Resolution (medium resolution, higher frame rate playback) and
J2K Playback - Quarter Resolution (lowest resolution, highest frame rate playback)

Once selected the setting is "sticky" - it remains in place for ALL calls to the CineForm J2K decoder, whether by Windows Media Player or other DirectShow applications.  So if you later need Full Quality remember to change the setting!  You will find these controls quite handy if you are doing shot review on J2K-AVI files on a slower CPU or laptop.  It is easy to select a specific resolution for playback, then observe the different playback performance offered by Windows Media Player.

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