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Note that ffmpeg sends orientattion value but not angle itself.
Decoding buffer size management
When RTMP stream is published from software encoder supportin hardware acceleration on NVIDIA GPU, and contains B-frames, the stream picture can twitch in some RTMP or HLS players. To workaround this, since build 5.2.863 the parameter was added to set the maximum decoding buffer size passed in SPS
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h264_sps_max_dec_frame_buffering=-1 |
By default, buffer size is not limited. This eliminates picture twitching, but can inscrease latency due to excessive buffering. In this case, the buffer size can be limited to 2 frames (default value before build 5.2.863)
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h264_sps_max_dec_frame_buffering=2 |
or more frames to eliminate twitching without viewable latency.
Incoming RTMP stream buffering
RTMP stream published with high resolution and bitrate may be played non smoothly via WebRTC with freezes or low FPS if publishers channel is unstable. Incoming stream should be buffered to prevent playback issues
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rtmp_in_buffer_enabled=true |
Adaptive RTMP incoming buffer has the following parameters to tune:
Parameter | Description | Default value |
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rtmp_in_buffer_start_size | Minimum buffer volume to start, ms | 300 |
rtmp_in_buffer_initial_size | Maxumum buffer volume, ms | 2000 |
rtmp_in_buffer_max_bufferings_allowed | Maximum bufferings amout allowed | -1 (unlimited) |
rtmp_in_buffer_polling_time | Buffer polling period, ms | 100 |
rtmp_in_buffer_overflow_allowed_deviation | Maximum difference between minimum and maximum buffer volumes used, ms | 1000 |
rtmp_in_buffer_overflow_deviation_window | Window size to collect the difference, ms | 30000 |
rtmp_in_buffer_overflow_rate | Maximum buffer overflow rate | 0.15 |
rtmp_in_buffer_clear_threshold | Clear all the data exceeding maxumum buffer size when buffer reaches the threshold, ms | 30000 |
Known issues
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| From another server via RTMP |
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| From another server via RTMP |
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nopanel | true |
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