Breaking News! MXF Captioning Solutions Posted on: 05/25/2011 3:52 pm under Solutions mxf-cc- ... VITAC has added MXF captioning solutions to our growing list of encode services: MXF Creation: We create a captioned MXF file from your proxy. Please provide your specifications: bitrate (35 or 50 Mbits/sec) and sampling (4:2:0 or 4:2:2) along with your proxy. MXF Captioning: We add captions to your existing MXF file. VITAC has provided this service for network producers, networks and others. Please contact us for help with your MXF questions.