Transcode pipelines split across two devices and decoding a 4K60 H.264 10-bit input stream will not perform at real-time speed.ĤK60 encode-only and decode-only use cases involve significant transfers of raw data between the host and the device. For 4k streams with bitrates significantly higher than the ones typically used for live streaming, it may not be possible to sustain real-time performance. The Xilinx video pipeline is optimized for live-streaming use cases. The Xilinx Video SDK solution supports real-time decoding and encoding of 4k streams with the following notes: The complete list of options is described below. Takes one input and up to 8 output streams.

multiscale_xma ¶įilter implementing the Xilinx ABR multiscaler. This section describes the options of the multiscale_xma complex filter. The Xilinx hardware scaler is leveraged in FFmpeg by using the multiscale_xma complex filter and the FFmpeg filter graph syntax. Since the output of one scaling stage is passed as an input to the next, video quality will be negatively affected if frame rate is increased after it has been lowered.įor the complete list of features and capabilities of the Xilinx hardware scaler, refer to the Adaptive Bitrate Scaler features section of the Specs and Features chapter of the documentation. The frame rate and resolution of a given output should be smaller or equal than the rate of the previous output. For best results, the outputs must be configured in descending order. Increasing resolutions between outputs is supported but will reduce video quality. IMPORTANT: The scaler is tuned for downscaling and expects non-increasing resolutions in an ABR ladder.

Scaling ladder: the output from one rung is passed to the next for further scaling ¶

Ffmpeg map filter