In 2.10.53.99 version the ability to process compressed video in embedded switch, Program module, Playout module and Recorder module was added.

This functionality can be used for:

• Splicing into transport streams using splicing technology;
• Increase CPU resource utilisation efficiency;
• Reduce quality loss due to re-compression.

The distinctive features of the function are the following:

• The audio is always re-encoded, which ensures the operation of audio functions (laudness, channel mixing)
• This implementation supports “splicing” anywhere, not necessarily in splice points. This is achieved by minimal re-coding of splice points if required.
• Full playlist functions are preserved: all transitions, splice points, background, overlapping layers, auto-generation of blocks, skipping no-media, hard-start, etc.
• It is possible to cut in not only by scte-35 cue-tones, but by any other conditions (dtmf, external-gpi, time (you can also by picture, but it will require decoding) ) )
• All functions of work with additional data are supported (SCTE-35, subtitles (608/708, teletext, dvb) can be inserted).
• In those cases where necessary, you can include the usual graphics, logo, open subtitles, insert other streams and files. In this case, will be included transcoding on the fragment where it is required.

The Recorder module can now accept a compressed video stream as input data, and if the destination compression settings are compatible with the input data, recording will be performed without decompressing or re-compressing the video.

In this mode, the Recorder module can still record starting from positions not necessarily aligned with keyframes. In this case, the Recorder module will re-encode a small portion of the input video to create a file that starts with a keyframe. The rest of the video will be kept intact.

This mode in the Recorder module allows you to:

• record a compressed input stream with minimal CPU usage since no decoding or encoding is required.
• avoid loss of video quality due to re-encoding.

The Use Compressed option in the Destination Profiles module Recorder settings allows you to directly use the compressed version of the input stream, if it is available, to record to a file.

The Playout module can now take compressed input video and re-multiplex it according to output settings such as MPEGTS, HLS or RTMP without decoding or re-encoding the video.

Video decoding or re-encoding is only performed if the input video compression settings do not match the configured output settings, allowing mixed pre-compressed and shared workflows to coexist for the same output signal.

The Use Compressed option allows the compressed version of the input stream to be used directly, if it is available, and if there is no format conversion, logo overlay, open subtitles, etc., and the codec matches the codec configured for the output.

The programme channel module is now able to keep video frames compressed, both when reading from files and when retrieving them from a background layer. In this mode, video decompression is only performed when necessary, for example for graphic overlay or at clip boundaries when playlist clips are not aligned to keyframe positions in the input compressed files.

The Output Mode option allows you to select one of three options for shaping the output stream given by the Program module to the virtual switcher:

• Uncompressed Only - only uncompressed video - this mode is completely similar to the classic variant of operation. Everything is decompressed, graphics are overlaid, and the result is output to the switcher.
• Compressed Only - only compressed version is output, if there are no graphics, transformations, etc., the original video from the file is not decompressed at all.
• Both - compressed and decompressed videos are generated. The principle of operation is similar to the previous variants. If graphics overlay is disabled, there is no format conversion, etc., and playback is from a file or from a compressed stream, then for such video fragments, in addition to the decompressed stream, the compressed version taken directly from the file/stream will go in parallel.

The function operation can be controlled by the readings of the corresponding counters on the Status tab. It is important to understand that the counters show current “instantaneous” FPS values of buffers for a certain time interval, so they can display values different from the frame rate specified in the module.

You can control the work of the function on the Status tab: Administrator Control Pnahel→Status→Recoder_N.

You can control the operation of the function on the Status tab: Administrator Control Pnahel→Status→Playout_N.

You can control the function operation on the Status tab: Administrator Control Pnahel→Status→Program_N.

The counters show the parameters at the output of the Program module.