46 lines
1.5 KiB
ReStructuredText
46 lines
1.5 KiB
ReStructuredText
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``nxcodec`` NxCodec video codec test application
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================================================
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This application is a command-line tool that verifies the functionality of
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NuttX codecs. Specifically, it serves as a verification tool for v4l2m2m.
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Usage
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-----
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This page shows nxcodec options, For a complete list of nxcodec options
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just run ``nxcodec -h``::
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ap> nxcodec -h
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NxCodec Version: 1.00
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Usage: nxcodec -d devname -s [wxh] -f [informt] -i infile -f [outformat] -o outfile
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Default settings for decoder parameters
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[-d | --device] Video device name
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[-s | --size] Size of stream
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[-h | --help] Print this message
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[-f | --format] Format of stream
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[-i | --infile] Input filename for M2M devices
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[-o | --outfile] Outputs stream to filename
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By default, it is the decodeing mode, with a default parameter size of
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640x480, input format of H264, and output format of YUV420. The ``-i``
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parameter corresponds to the input parameter before it, and the ``-i``
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parameter corresponds to the output parameter after it.
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Examples
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--------
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Decode an H264 stream file into a yuv420 file::
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mount -t hostfs -o fs=/path/from/ /stream
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nxcodec -d /dev/video1 -s 256x144 -i /stream/256x144.h264 -o /stream/256x144-yuv420p.yuv
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Encode a yuv420 file as an h264 stream file::
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mount -t hostfs -o fs=/path/from/ /stream
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nxcodec -d /dev/video2 -s 256x144 -f YU12 -i /stream/256x144-yuv420p.yuv -f H264 -o /stream/256x144.h264
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Author: ZhengHui SHI
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Date: 9 July 2024
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