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25 lines
1.3 KiB
Plaintext
25 lines
1.3 KiB
Plaintext
This file serves to document some of the decoder errata when using MediaCodec hardware decoders on certain devices.
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1. num_ref_frames is set to 16 by NVENC which causes decoders to allocate 16+ buffers. This can cause an error or lag on some devices.
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- Affected decoders: TI OMAP4, Allwinner A20
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2. Some decoders have a huge per-frame latency with the unmodified SPS sent from NVENC. Setting max_dec_frame_buffering fixes this latency issue.
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- Affected decoders: NVIDIA Tegra 3 and 4, Broadcom VideoCore IV
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3. Some decoders strictly require that you pass BUFFER_FLAG_CODEC_CONFIG and crash upon the IDR frame if you don't
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- Affected decoders: TI OMAP4
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4. Some decoders require num_ref_frames=1 and max_dec_frame_buffering=1 to avoid crashing on SPS on first I-frame
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- Affected decoders: Qualcomm in GS3 on 4.3+, Exynos 4 at 1080p only
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5. Some decoders will hang if max_dec_frame_buffering is not present
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- Affected decoders: MediaTek decoder in Fire HD 7 (2014)
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6. Some decoders will hang if max_dec_frame_buffering IS present
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- Affected decoders: Exynos 5 in Galaxy Note 10.1 (2014)
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7. Some decoders will not enter low latency mode if adaptive playback is enabled
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- Affected decoders: Intel decoder in Nexus Player
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8. Some decoders will not enter low latency mode if the profile isn't baseline in the first SPS.
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- Affected decoders: Intel decoder in Nexus Player |