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VP8 encoding
videotestsrc
ARM load: 156% but only videotestsrc consumes 100%. According to the NVIDIA forum when using videotestsrc the system is also doing memory copies to feed the encoder with NVMM memory buffers so that loads more of the ARM.
gst-launch-1.0 videotestsrc num-buffers=150 ! 'video/x-raw, format=(string)I420,width=(int)640, height=(int)480' ! omxvp8enc ! qtmux ! filesink location=test.mp4 -e
VLC can play the file correctly at 30fps and reports as codec: Google/On2's VP8 Video (VP80). The fan on top of the SoC didn't turn on.
nvcamerasrc
gst-launch-1.0 -e nvcamerasrc fpsRange="30.0 30.0" ! 'video/x-raw(memory:NVMM), width=(int)1920, height=(int)1080, format=(string)I420, framerate=(fraction)30/1' ! \ nvvidconv flip-method=2 ! 'video/x-raw(memory:NVMM), format=(string)I420' ! omxvp8enc bitrate=8000000 ! qtmux ! filesink location=test.mp4 -e
VLC reports a bitrate of ~8Mbps.
ARM consumption ~50% of one core (4 cores available 400% - this means something like 15.5% of total). However, only the capture is 11.25% so the VP8 consumes 4.25%
RAM 1442/7853MB (lfb 1134x4MB) cpu [0%@1267,off,off,0%@1267,0%@1267,0%@1267] RAM 1442/7853MB (lfb 1134x4MB) cpu [16%@345,off,off,12%@345,15%@345,14%@345] RAM 1442/7853MB (lfb 1134x4MB) cpu [11%@345,off,off,17%@345,14%@345,17%@345] RAM 1442/7853MB (lfb 1134x4MB) cpu [17%@345,off,off,18%@345,13%@345,10%@345] RAM 1442/7853MB (lfb 1134x4MB) cpu [19%@345,off,off,18%@345,14%@345,9%@345] RAM 1442/7853MB (lfb 1134x4MB) cpu [13%@499,off,off,14%@499,15%@499,17%@499] RAM 1442/7853MB (lfb 1134x4MB) cpu [16%@345,off,off,15%@345,8%@345,11%@345] RAM 1443/7853MB (lfb 1134x4MB) cpu [14%@345,off,off,13%@345,9%@345,15%@345] RAM 1442/7853MB (lfb 1134x4MB) cpu [9%@345,off,off,16%@345,13%@345,9%@345] RAM 1443/7853MB (lfb 1134x4MB) cpu [10%@345,off,off,15%@345,8%@345,14%@345] RAM 1442/7853MB (lfb 1134x4MB) cpu [11%@345,off,off,19%@345,10%@345,15%@345] RAM 1443/7853MB (lfb 1134x4MB) cpu [14%@345,off,off,23%@345,10%@345,13%@345] RAM 1443/7853MB (lfb 1134x4MB) cpu [14%@345,off,off,20%@345,8%@345,12%@345] RAM 1443/7853MB (lfb 1134x4MB) cpu [15%@345,off,off,21%@345,6%@345,10%@345]
1574 root 20 0 9.979g 264008 44716 S 45.7 3.3 14:43.58 nvcamera-daemon 13065 nvidia 20 0 719944 14140 9996 S 9.2 0.2 0:09.34 gst-launch-1.0
The encoder exposes the following parameters
bitrate : Target bitrate
flags: readable, writable, changeable in NULL, READY, PAUSED or PLAYING state
Unsigned Integer. Range: 0 - 4294967295 Default: 4000000
quant-i-frames : Quantization parameter for I-frames (0xffffffff=component default)
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295
quant-p-frames : Quantization parameter for P-frames (0xffffffff=component default)
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295
quant-b-frames : Quantization parameter for B-frames (0xffffffff=component default)
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295
iframeinterval : Encoding Intra Frame occurance frequency
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 0
SliceIntraRefreshEnable: Enable Slice Intra Refresh while encoding
flags: readable, writable, changeable only in NULL or READY state
Boolean. Default: false
SliceIntraRefreshInterval: Set SliceIntraRefreshInterval
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 60
bit-packetization : Whether or not Packet size is based upon Number Of bits
flags: readable, writable, changeable only in NULL or READY state
Boolean. Default: false
vbv-size : virtual buffer size = vbv-size * (bitrate/fps)
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 30 Default: 10
temporal-tradeoff : Temporal Tradeoff value for encoder
flags: readable, writable, changeable only in NULL or READY state
Enum "GstOmxVideoEncTemporalTradeoffType" Default: 0, "Do not drop frames"
(0): Do not drop frames - GST_OMX_VIDENC_DROP_NO_FRAMES
(1): Drop 1 in 5 frames - GST_OMX_VIDENC_DROP_1_IN_5_FRAMES
(2): Drop 1 in 3 frames - GST_OMX_VIDENC_DROP_1_IN_3_FRAMES
(3): Drop 1 in 2 frames - GST_OMX_VIDENC_DROP_1_IN_2_FRAMES
(4): Drop 2 in 3 frames - GST_OMX_VIDENC_DROP_2_IN_3_FRAMES
EnableMVBufferMeta : Enable Motion Vector Meta data for encoding
flags: readable, writable, changeable only in NULL or READY state
Boolean. Default: false
qp-range : Qunatization range for P and I frame,
Use string with values of Qunatization Range
in MinQpP-MaxQpP:MinQpI-MaxQpP:MinQpB-MaxQpB order, to set the property.
flags: readable, writable
String. Default: "-1,-1:-1,-1:-1,-1"
MeasureEncoderLatency: Enable Measure Encoder latency Per Frame
flags: readable, writable, changeable only in NULL or READY state
Boolean. Default: false
EnableTwopassCBR : Enable two pass CBR while encoding
flags: readable, writable, changeable only in NULL or READY state
Boolean. Default: false
preset-level : HW preset level for encoder
flags: readable, writable, changeable only in NULL or READY state
Enum "GstOMXVideoEncHwPreset" Default: 0, "UltraFastPreset"
(0): UltraFastPreset - UltraFastPreset for high perf
(1): FastPreset - FastPreset
(2): MediumPreset - MediumPreset
(3): SlowPreset - SlowPreset