Tech Tip - Leitch (LXF) Files
PixelTools products can input Leitch (LXF) source files, split them into their elementary components and convert them to compliant broadcast streams.
An LXF file is a multimedia storage format that contains MPEG-2 video and PCM or MPEG Audio wrapped in the proprietary Leitch Native Stream Format. PixelTools products such as MPEGRepairHD and Expert-Caption can split LXF files into their elementary video and audio components. PixelTools products can also be run in the batch mode to convert all .LXF files in a folder to compliant MPEG Transport streams with MPEG video and audio compliant with broadcast standards.
LXF File Split
To split an LXF file into its elementary components,
- Drag and Drop or browse for your LXF file in the Decode Input Edit Box
- Set up the Decode | Configure | Extract Streams with the Save Elementary Video in File and the Save MFX or LXF Audio options checked and output storage file names:
Click on image for larger view
- Depress the Decode | Run (MPEGRepairHD) or the Update (Expert-Caption) button to initiate the process.
LXF File Batch Transcode
To transcode a LXF file into an MPEG Transport or Program File, open a DOS window and enter:
[Install Folder]\Mpegrep -lx SourceFile.lxf
Or
[Install Folder]\ExpCap -lx SourceFile.lxf
The LXF file will be split into elementary video and pcm audio; the audio will be encoded as a two channel MPEG file, and the elementary video and audio will be multiplexed into a transport or program file called SourceFile.mpg.
You can easily process all .LXF files in a folder by using a batch command:
for %%J in (%1\*.lxf) do call SplitLxf %%J
where SplitLxf.bat file calls
(path)\ MpegRep -lx %1
Specifications
Source LXF File
Video
HD or SD MPEG format
Audio
8, 4 or 2 channel PCM
2 channel MPEG audio
Processed Output
Elementary video file with elementary MPEG audio or PCM audio
ATSC compliant Transport stream with SMPT-302M or MPEG audio
Program stream with MPEG audio and MPEG video
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