A VOB file (Video Object) is a container format in DVD-Video media. VOB can contain video, audio, subtitle and menu contents multiplexed together into a stream form. When you want to convert and burn VOB to Blue Ray discs. We suggest a tool - VOB to Blue Ray Creator to help you. As a compact and fully functional application, VOB to Blue Ray Creator can both convert VOB to Blue Ray folders and ISO image.
VOB to Blu-ray creator allows you to easily burn your videos to Blu-ray discs (BD-R, BD-RE, BD-25, BD-50) BDMV ISO. All the video formats like M2TS, MTS, AVI, MP4, MKV, DV, MPEG, MOV, QT, RM, RMVB, WMV, ASF, DAT, FLV, VOB, TS, 3GP, etc. are supported by this creator. Additionally, VOB to Blue Ray Creator offers powerful editing functions enable you to customize your Blu-ray movies by cropping video playing region, adding subtitles/audio/watermarks and adjusting image settings.
Guide: How to use the VOB to Blue Ray CreatorStep 1: 
Free download VOB to Blue Ray Creator and install it and run.
Step 2: Add files
You can directly drag and drop the video files to the main window or click the button on the toolbar to add your VOB files.
Step 3: Create Video Watermarks
Select the file you want to edit, click 
on the toolbar to open the Effect window.
1)Add text watermark
Click 
near the top of the panel and enter the watermark text in the text box.
You can adjust the watermark as follows:
2) Add picture watermark. The same with Add Text Watermark.
Step 4: Set the output and Enter the Volume Label
Click the Destination drop-down button to select BD folder or ISO image image file from the drop-down list and then enter a name in the Volume Label field to name the output.
Step 5: Start burning
When all the above settings finished, click 
to start the burning process.
Related software: AVS Video Converter AVS Video Converter is a dedicated tool for vob to blue ray creator and converting video files, including DVD video, between different video formats and for creating DVD video discs.
Download free version 
Buy full version $39