GStreamer Decoding Parameters - 2023.1 English

H.264/H.265 Video Codec Unit v1.2 Solutions LogiCORE IP Product Guide (PG252)

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2023.1 English
Table 1. GStreamer Decoding Parameters
Parameter GStreamer property Description
Entropy Buffers internal-entropy-buffers Specifies decoder internal entropy buffers, used to smooth out entropy decoding performance. Specify values in integer between 2 and 16. Increasing buffering-count increases decoder memory footprint.

Default value: 5.

Set this value to 10 for higher bit-rate use cases. For example, uses cases where the bitrate is more than 100 Mb/s.

Latency latency-mode For 2019.1 and later releases:

Specifies decoder latency mode.

  • (0): false - Normal mode
  • (1): true - If alignment is AU, reduced-latency mode and if alignment is NAL, low-latency mode

Default value: 0.

For 2018.3 and prior releases:

  • 0 = default
  • 1 = reduced-latency (Low reference DPB mode)
  • 2 = low-latency
Note: When using low latency mode the encoder and decoder are limited by the number of internal cores. The encoder has a maximum of four streams and the decoder has a maximum of two stream. For more details, see VCU Latency Modes.
Split-input mode split-input When enabled, the decoder has 1 to 1 mapping for input and output buffers. When disabled, the decoder copies all the input buffers to internal circular buffer and processes them.

Default: FALSE

QoS Qos Drop late frames based on QOS events.

Default: FALSE