def _set_transform(self, value):
mp = mmal.MMAL_DISPLAYREGION_T(
mmal.MMAL_PARAMETER_HEADER_T(mmal.MMAL_PARAMETER_DISPLAYREGION, ct.sizeof(mmal.MMAL_DISPLAYREGION_T)),
set=mmal.MMAL_DISPLAY_SET_TRANSFORM,
transform=value,
)
mmal_check(mmal.mmal_port_parameter_set(self.renderer[0].input[0], mp.hdr), prefix="Failed to set transform")
def _add_exif_tag(self, tag, value):
# Format the tag and value into an appropriate bytes string, encoded
# with the Exif encoding (ASCII)
if isinstance(tag, str):
tag = tag.encode(self.exif_encoding)
if isinstance(value, str):
value = value.encode(self.exif_encoding)
elif isinstance(value, datetime.datetime):
value = value.strftime('%Y:%m:%d %H:%M:%S').encode(self.exif_encoding)
# MMAL_PARAMETER_EXIF_T is a variable sized structure, hence all the
# mucking about with string buffers here...
buf = ct.create_string_buffer(
ct.sizeof(mmal.MMAL_PARAMETER_EXIF_T) + len(tag) + len(value) + 1)
mp = ct.cast(buf, ct.POINTER(mmal.MMAL_PARAMETER_EXIF_T))
mp[0].hdr.id = mmal.MMAL_PARAMETER_EXIF
mp[0].hdr.size = len(buf)
if (b'=' in tag or b'\x00' in value):
data = tag + value
mp[0].keylen = len(tag)
mp[0].value_offset = len(tag)
mp[0].valuelen = len(value)
else:
data = tag + b'=' + value
ct.memmove(mp[0].data, data, len(data))
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp[0].hdr),
prefix="Failed to set Exif tag %s" % tag)
def _set_fullscreen(self, value):
mp = mmal.MMAL_DISPLAYREGION_T(
mmal.MMAL_PARAMETER_HEADER_T(mmal.MMAL_PARAMETER_DISPLAYREGION, ct.sizeof(mmal.MMAL_DISPLAYREGION_T)),
set=mmal.MMAL_DISPLAY_SET_FULLSCREEN,
fullscreen=bool(value),
)
mmal_check(mmal.mmal_port_parameter_set(self.renderer[0].input[0], mp.hdr), prefix="Failed to set fullscreen")
def _set_crop(self, value):
try:
x, y, w, h = value
except (TypeError, ValueError) as e:
raise PiCameraValueError("Invalid crop rectangle (x, y, w, h) tuple: %s" % value)
mp = mmal.MMAL_DISPLAYREGION_T(
mmal.MMAL_PARAMETER_HEADER_T(mmal.MMAL_PARAMETER_DISPLAYREGION, ct.sizeof(mmal.MMAL_DISPLAYREGION_T)),
set=mmal.MMAL_DISPLAY_SET_SRC_RECT,
src_rect=mmal.MMAL_RECT_T(x, y, w, h),
)
mmal_check(mmal.mmal_port_parameter_set(self.renderer[0].input[0], mp.hdr), prefix="Failed to set crop")
def _set_layer(self, value):
try:
if not (0 <= value <= 255):
raise PiCameraValueError("Invalid layer value: %d (valid range 0..255)" % value)
except TypeError:
raise PiCameraValueError("Invalid layer value: %s" % value)
mp = mmal.MMAL_DISPLAYREGION_T(
mmal.MMAL_PARAMETER_HEADER_T(mmal.MMAL_PARAMETER_DISPLAYREGION, ct.sizeof(mmal.MMAL_DISPLAYREGION_T)),
set=mmal.MMAL_DISPLAY_SET_LAYER,
layer=value,
)
mmal_check(mmal.mmal_port_parameter_set(self.renderer[0].input[0], mp.hdr), prefix="Failed to set layer")
def _create_encoder(self, quality=85, thumbnail=(64, 48, 35), bayer=False):
super(PiImageEncoder, self)._create_encoder()
try:
self.output_port[0].format[0].encoding = {
'jpeg': mmal.MMAL_ENCODING_JPEG,
'png': mmal.MMAL_ENCODING_PNG,
'gif': mmal.MMAL_ENCODING_GIF,
'bmp': mmal.MMAL_ENCODING_BMP,
}[self.format]
except KeyError:
raise PiCameraValueError("Unrecognized format %s" % self.format)
mmal_check(
mmal.mmal_port_format_commit(self.output_port),
prefix="Unable to set format on encoder output port")
if self.format == 'jpeg':
mmal_check(
mmal.mmal_port_parameter_set_uint32(
self.output_port,
mmal.MMAL_PARAMETER_JPEG_Q_FACTOR,
quality),
prefix="Failed to set JPEG quality")
mmal_check(
mmal.mmal_port_parameter_set_boolean(
self.camera_port,
mmal.MMAL_PARAMETER_ENABLE_RAW_CAPTURE,
int(bool(bayer))),
prefix="Failed to set raw capture")
if thumbnail is None:
mp = mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_THUMBNAIL_CONFIGURATION,
ct.sizeof(mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T)
),
0, 0, 0, 0)
else:
mp = mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_THUMBNAIL_CONFIGURATION,
ct.sizeof(mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T)
),
1, *thumbnail)
mmal_check(
mmal.mmal_port_parameter_set(self.encoder[0].control, mp.hdr),
prefix="Failed to set thumbnail configuration")
mmal_check(
mmal.mmal_component_enable(self.encoder),
prefix="Unable to enable encoder component")
def _set_alpha(self, value):
try:
if not (0 <= value <= 255):
raise PiCameraValueError(
"Invalid alpha value: %d (valid range 0..255)" % value)
except TypeError:
raise PiCameraValueError("Invalid alpha value: %s" % value)
mp = mmal.MMAL_DISPLAYREGION_T(mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_DISPLAYREGION,
ct.sizeof(mmal.MMAL_DISPLAYREGION_T)),
set=mmal.MMAL_DISPLAY_SET_ALPHA,
alpha=value)
mmal_check(mmal.mmal_port_parameter_set(self.renderer[0].input[0],
mp.hdr),
prefix="Failed to set alpha")
def _create_encoder(self, format, **options):
super(PiImageEncoder, self)._create_encoder(format, **options)
try:
self.output_port[0].format[0].encoding = {
'jpeg': mmal.MMAL_ENCODING_JPEG,
'png': mmal.MMAL_ENCODING_PNG,
'gif': mmal.MMAL_ENCODING_GIF,
'bmp': mmal.MMAL_ENCODING_BMP,
}[format]
except KeyError:
raise PiCameraValueError("Unrecognized format %s" % format)
mmal_check(
mmal.mmal_port_format_commit(self.output_port),
prefix="Unable to set format on encoder output port")
if format == 'jpeg':
mmal_check(
mmal.mmal_port_parameter_set_uint32(
self.output_port,
mmal.MMAL_PARAMETER_JPEG_Q_FACTOR,
options.get('quality', 85)),
prefix="Failed to set JPEG quality")
thumbnail = options.get('thumbnail', (64, 48, 35))
if thumbnail is None:
mp = mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_THUMBNAIL_CONFIGURATION,
ct.sizeof(mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T)
),
0, 0, 0, 0)
else:
mp = mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_THUMBNAIL_CONFIGURATION,
ct.sizeof(mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T)
),
1, *thumbnail)
mmal_check(
mmal.mmal_port_parameter_set(self.encoder[0].control, mp.hdr),
prefix="Failed to set thumbnail configuration")
mmal_check(
mmal.mmal_component_enable(self.encoder),
prefix="Unable to enable encoder component")
def _create_encoder(self, quality=85, thumbnail=(64, 48, 35), bayer=False):
super(PiImageEncoder, self)._create_encoder()
try:
self.output_port[0].format[0].encoding = {
'jpeg': mmal.MMAL_ENCODING_JPEG,
'png': mmal.MMAL_ENCODING_PNG,
'gif': mmal.MMAL_ENCODING_GIF,
'bmp': mmal.MMAL_ENCODING_BMP,
}[self.format]
except KeyError:
raise PiCameraValueError("Unrecognized format %s" % self.format)
mmal_check(mmal.mmal_port_format_commit(self.output_port),
prefix="Unable to set format on encoder output port")
if self.format == 'jpeg':
mmal_check(mmal.mmal_port_parameter_set_uint32(
self.output_port, mmal.MMAL_PARAMETER_JPEG_Q_FACTOR, quality),
prefix="Failed to set JPEG quality")
mmal_check(mmal.mmal_port_parameter_set_boolean(
self.camera_port, mmal.MMAL_PARAMETER_ENABLE_RAW_CAPTURE,
int(bool(bayer))),
prefix="Failed to set raw capture")
if thumbnail is None:
mp = mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_THUMBNAIL_CONFIGURATION,
ct.sizeof(mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T)), 0,
0, 0, 0)
else:
mp = mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_THUMBNAIL_CONFIGURATION,
ct.sizeof(mmal.MMAL_PARAMETER_THUMBNAIL_CONFIG_T)), 1,
*thumbnail)
mmal_check(mmal.mmal_port_parameter_set(self.encoder[0].control,
mp.hdr),
prefix="Failed to set thumbnail configuration")
mmal_check(mmal.mmal_component_enable(self.encoder),
prefix="Unable to enable encoder component")
def _create_encoder(self,
bitrate=17000000,
intra_period=0,
profile='high',
quantization=0,
inline_headers=True,
sei=False):
super(PiVideoEncoder, self)._create_encoder()
try:
self.output_port[0].format[0].encoding = {
'h264': mmal.MMAL_ENCODING_H264,
'mjpeg': mmal.MMAL_ENCODING_MJPEG,
}[self.format]
except KeyError:
raise PiCameraValueError('Unrecognized format %s' % self.format)
if not (0 <= bitrate <= 25000000):
raise PiCameraValueError(
'bitrate must be between 0 (VBR) and 25Mbps')
if quantization and bitrate:
warnings.warn('Setting bitrate to 0 as quantization is non-zero',
PiCameraWarning)
bitrate = 0
self.output_port[0].format[0].bitrate = bitrate
mmal_check(mmal.mmal_port_format_commit(self.output_port),
prefix="Unable to set format on encoder output port")
if self.format == 'h264':
mp = mmal.MMAL_PARAMETER_VIDEO_PROFILE_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_PROFILE,
ct.sizeof(mmal.MMAL_PARAMETER_VIDEO_PROFILE_T),
), )
try:
mp.profile[0].profile = {
'baseline':
mmal.MMAL_VIDEO_PROFILE_H264_BASELINE,
'main':
mmal.MMAL_VIDEO_PROFILE_H264_MAIN,
'high':
mmal.MMAL_VIDEO_PROFILE_H264_HIGH,
'constrained':
mmal.MMAL_VIDEO_PROFILE_H264_CONSTRAINED_BASELINE,
}[profile]
except KeyError:
raise PiCameraValueError("Invalid H.264 profile %s" % profile)
mp.profile[0].level = mmal.MMAL_VIDEO_LEVEL_H264_4
mmal_check(mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set encoder H.264 profile")
mmal_check(mmal.mmal_port_parameter_set_boolean(
self.output_port,
mmal.MMAL_PARAMETER_VIDEO_ENCODE_INLINE_HEADER,
int(inline_headers)),
prefix="Unable to set inline_headers")
mmal_check(mmal.mmal_port_parameter_set_boolean(
self.output_port, mmal.MMAL_PARAMETER_VIDEO_ENCODE_SEI_ENABLE,
int(sei)),
prefix="Enable to set SEI")
if not (bitrate and inline_headers):
# If inline_headers is disabled, or VBR encoding is configured,
# disable the split function
self._next_output = None
if intra_period:
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_INTRAPERIOD,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
), intra_period)
mmal_check(mmal.mmal_port_parameter_set(
self.output_port, mp.hdr),
prefix="Unable to set encoder intra_period")
if quantization:
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_VIDEO_ENCODE_INITIAL_QUANT,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
), quantization)
mmal_check(mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set initial quantization")
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_VIDEO_ENCODE_MIN_QUANT,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
),
quantization,
)
mmal_check(mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set minimum quantization")
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_VIDEO_ENCODE_MAX_QUANT,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
),
quantization,
)
mmal_check(mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set maximum quantization")
mmal_check(mmal.mmal_port_parameter_set_boolean(
self.encoder[0].input[0],
mmal.MMAL_PARAMETER_VIDEO_IMMUTABLE_INPUT, 1),
prefix="Unable to set immutable flag on encoder input port")
mmal_check(mmal.mmal_component_enable(self.encoder),
prefix="Unable to enable video encoder component")
def _create_encoder(
self, bitrate=17000000, intra_period=0, profile="high", quantization=0, inline_headers=True, **options
):
super(PiVideoEncoder, self)._create_encoder(**options)
try:
self.output_port[0].format[0].encoding = {
"h264": mmal.MMAL_ENCODING_H264,
"mjpeg": mmal.MMAL_ENCODING_MJPEG,
}[self.format]
except KeyError:
raise PiCameraValueError("Unrecognized format %s" % self.format)
if not (0 <= bitrate <= 25000000):
raise PiCameraValueError("bitrate must be between 0 (VBR) and 25Mbps")
if quantization and bitrate:
warnings.warn("Setting bitrate to 0 as quantization is non-zero", PiCameraWarning)
bitrate = 0
self.output_port[0].format[0].bitrate = bitrate
mmal_check(mmal.mmal_port_format_commit(self.output_port), prefix="Unable to set format on encoder output port")
if self.format == "h264":
mp = mmal.MMAL_PARAMETER_VIDEO_PROFILE_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_PROFILE, ct.sizeof(mmal.MMAL_PARAMETER_VIDEO_PROFILE_T)
)
)
try:
mp.profile[0].profile = {
"baseline": mmal.MMAL_VIDEO_PROFILE_H264_BASELINE,
"main": mmal.MMAL_VIDEO_PROFILE_H264_MAIN,
"high": mmal.MMAL_VIDEO_PROFILE_H264_HIGH,
"constrained": mmal.MMAL_VIDEO_PROFILE_H264_CONSTRAINED_BASELINE,
}[profile]
except KeyError:
raise PiCameraValueError("Invalid H.264 profile %s" % profile)
mp.profile[0].level = mmal.MMAL_VIDEO_LEVEL_H264_4
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr), prefix="Unable to set encoder H.264 profile"
)
mmal_check(
mmal.mmal_port_parameter_set_boolean(
self.output_port, mmal.MMAL_PARAMETER_VIDEO_ENCODE_INLINE_HEADER, int(inline_headers)
),
prefix="Unable to set inline_headers",
)
if not (bitrate and inline_headers):
# If inline_headers is disabled, or VBR encoding is configured,
# disable the split function
self._next_output = None
if intra_period:
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_INTRAPERIOD, ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T)
),
intra_period,
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr), prefix="Unable to set encoder intra_period"
)
if quantization:
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_VIDEO_ENCODE_INITIAL_QUANT, ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T)
),
quantization,
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr), prefix="Unable to set initial quantization"
)
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_VIDEO_ENCODE_MIN_QUANT, ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T)
),
quantization,
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr), prefix="Unable to set minimum quantization"
)
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_VIDEO_ENCODE_MAX_QUANT, ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T)
),
quantization,
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr), prefix="Unable to set maximum quantization"
)
mmal_check(
mmal.mmal_port_parameter_set_boolean(
self.encoder[0].input[0], mmal.MMAL_PARAMETER_VIDEO_IMMUTABLE_INPUT, 1
),
prefix="Unable to set immutable flag on encoder input port",
)
mmal_check(mmal.mmal_component_enable(self.encoder), prefix="Unable to enable video encoder component")
def _create_encoder(
self, bitrate=17000000, intra_period=0, profile='high',
quantization=0, inline_headers=True, sei=False):
super(PiVideoEncoder, self)._create_encoder()
try:
self.output_port[0].format[0].encoding = {
'h264': mmal.MMAL_ENCODING_H264,
'mjpeg': mmal.MMAL_ENCODING_MJPEG,
}[self.format]
except KeyError:
raise PiCameraValueError('Unrecognized format %s' % self.format)
if not (0 <= bitrate <= 25000000):
raise PiCameraValueError('bitrate must be between 0 (VBR) and 25Mbps')
if quantization and bitrate:
warnings.warn('Setting bitrate to 0 as quantization is non-zero', PiCameraWarning)
bitrate = 0
self.output_port[0].format[0].bitrate = bitrate
mmal_check(
mmal.mmal_port_format_commit(self.output_port),
prefix="Unable to set format on encoder output port")
if self.format == 'h264':
mp = mmal.MMAL_PARAMETER_VIDEO_PROFILE_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_PROFILE,
ct.sizeof(mmal.MMAL_PARAMETER_VIDEO_PROFILE_T),
),
)
try:
mp.profile[0].profile = {
'baseline': mmal.MMAL_VIDEO_PROFILE_H264_BASELINE,
'main': mmal.MMAL_VIDEO_PROFILE_H264_MAIN,
'high': mmal.MMAL_VIDEO_PROFILE_H264_HIGH,
'constrained': mmal.MMAL_VIDEO_PROFILE_H264_CONSTRAINED_BASELINE,
}[profile]
except KeyError:
raise PiCameraValueError("Invalid H.264 profile %s" % profile)
mp.profile[0].level = mmal.MMAL_VIDEO_LEVEL_H264_4
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set encoder H.264 profile")
mmal_check(
mmal.mmal_port_parameter_set_boolean(
self.output_port,
mmal.MMAL_PARAMETER_VIDEO_ENCODE_INLINE_HEADER,
int(inline_headers)),
prefix="Unable to set inline_headers")
mmal_check(
mmal.mmal_port_parameter_set_boolean(
self.output_port,
mmal.MMAL_PARAMETER_VIDEO_ENCODE_SEI_ENABLE,
int(sei)),
prefix="Enable to set SEI")
if not (bitrate and inline_headers):
# If inline_headers is disabled, or VBR encoding is configured,
# disable the split function
self._next_output = None
# We need the intra-period to calculate the SPS header timeout in
# the split method below. If one is not set explicitly, query the
# encoder's default
if intra_period:
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_INTRAPERIOD,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
),
intra_period
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set encoder intra_period")
self._intra_period = intra_period
else:
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_INTRAPERIOD,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
))
mmal_check(
mmal.mmal_port_parameter_get(self.output_port, mp.hdr),
prefix="Unable to get encoder intra_period")
self._intra_period = mp.value
elif self.format == 'mjpeg':
# MJPEG doesn't have an intra_period setting as such, but as every
# frame is a full-frame, the intra_period is effectively 1
self._intra_period = 1
if quantization:
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_VIDEO_ENCODE_INITIAL_QUANT,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
),
quantization
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set initial quantization")
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_VIDEO_ENCODE_MIN_QUANT,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
),
quantization,
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set minimum quantization")
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_VIDEO_ENCODE_MAX_QUANT,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
),
quantization,
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set maximum quantization")
mmal_check(
mmal.mmal_port_parameter_set_boolean(
self.encoder[0].input[0],
mmal.MMAL_PARAMETER_VIDEO_IMMUTABLE_INPUT,
1),
prefix="Unable to set immutable flag on encoder input port")
mmal_check(
mmal.mmal_component_enable(self.encoder),
prefix="Unable to enable video encoder component")
def _create_encoder(
self, format, bitrate=17000000, intra_period=0, profile='high',
quantization=0, inline_headers=True, **options):
super(PiVideoEncoder, self)._create_encoder(format, **options)
try:
self.output_port[0].format[0].encoding = {
'h264': mmal.MMAL_ENCODING_H264,
}[format]
except KeyError:
raise PiCameraValueError('Unrecognized format %s' % format)
if not (0 <= bitrate <= 25000000):
raise PiCameraValueError('bitrate must be between 0 (VBR) and 25Mbps')
if quantization and bitrate:
warnings.warn('Setting bitrate to 0 as quantization is non-zero', PiCameraWarning)
bitrate = 0
self.output_port[0].format[0].bitrate = bitrate
mmal_check(
mmal.mmal_port_format_commit(self.output_port),
prefix="Unable to set format on encoder output port")
if intra_period:
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_INTRAPERIOD,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
),
intra_period
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set encoder intra_period")
if quantization:
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_VIDEO_ENCODE_INITIAL_QUANT,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
),
quantization
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set quantization")
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_VIDEO_ENCODE_QP_P,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
),
quantization + 6,
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set quantization")
mp = mmal.MMAL_PARAMETER_VIDEO_PROFILE_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_PROFILE,
ct.sizeof(mmal.MMAL_PARAMETER_VIDEO_PROFILE_T),
),
)
try:
mp.profile[0].profile = {
'baseline': mmal.MMAL_VIDEO_PROFILE_H264_BASELINE,
'main': mmal.MMAL_VIDEO_PROFILE_H264_MAIN,
'high': mmal.MMAL_VIDEO_PROFILE_H264_HIGH,
'constrained': mmal.MMAL_VIDEO_PROFILE_H264_CONSTRAINED_BASELINE,
}[profile]
except KeyError:
raise PiCameraValueError("Invalid H.264 profile %s" % profile)
mp.profile[0].level = mmal.MMAL_VIDEO_LEVEL_H264_4
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set encoder H.264 profile")
mmal_check(
mmal.mmal_port_parameter_set_boolean(
self.input_port,
mmal.MMAL_PARAMETER_VIDEO_IMMUTABLE_INPUT,
1),
prefix="Unable to set immutable flag on encoder input port")
mmal_check(
mmal.mmal_port_parameter_set_boolean(
self.output_port,
mmal.MMAL_PARAMETER_VIDEO_ENCODE_INLINE_HEADER,
int(inline_headers)),
prefix="Unable to set inline_headers")
if not (bitrate and inline_headers):
# If inline_headers is disabled, or VBR encoding is configured,
# disable the split function
self._next_output = None
mmal_check(
mmal.mmal_component_enable(self.encoder),
prefix="Unable to enable video encoder component")
def _create_encoder(self, format, **options):
super(PiVideoEncoder, self)._create_encoder(format, **options)
try:
self.output_port[0].format[0].encoding = {
'h264': mmal.MMAL_ENCODING_H264,
}[format]
except KeyError:
raise PiCameraValueError('Unrecognized format %s' % format)
bitrate = options.get('bitrate', 17000000)
if bitrate > 25000000:
raise PiCameraValueError('25Mbps is the maximum bitrate')
self.output_port[0].format[0].bitrate = bitrate
mmal_check(
mmal.mmal_port_format_commit(self.output_port),
prefix="Unable to set format on encoder output port")
if 'intraperiod' in options:
mp = mmal.MMAL_PARAMETER_UINT32_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_INTRAPERIOD,
ct.sizeof(mmal.MMAL_PARAMETER_UINT32_T),
),
int(options['intraperiod'])
)
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set encoder intraperiod")
if 'profile' in options:
mp = mmal.MMAL_PARAMETER_VIDEO_PROFILE_T(
mmal.MMAL_PARAMETER_HEADER_T(
mmal.MMAL_PARAMETER_PROFILE,
ct.sizeof(mmal.MMAL_PARAMETER_VIDEO_PROFILE_T),
),
)
mp.profile[0].profile = {
'baseline': mmal.MMAL_VIDEO_PROFILE_H264_BASELINE,
'main': mmal.MMAL_VIDEO_PROFILE_H264_MAIN,
'high': mmal.MMAL_VIDEO_PROFILE_H264_HIGH,
'constrained': mmal.MMAL_VIDEO_PROFILE_H264_CONSTRAINED_BASELINE,
}[options['profile']]
mp.profile[0].level = mmal.MMAL_VIDEO_LEVEL_H264_4
mmal_check(
mmal.mmal_port_parameter_set(self.output_port, mp.hdr),
prefix="Unable to set encoder H.264 profile")
# XXX Why does this fail? Is it even needed?
#try:
# mmal_check(
# mmal.mmal_port_parameter_set_boolean(
# enc_in,
# mmal.MMAL_PARAMETER_VIDEO_IMMUTABLE_INPUT,
# 1),
# prefix="Unable to set immutable flag on encoder input port")
#except PiCameraError as e:
# print(str(e))
# # Continue rather than abort...
mmal_check(
mmal.mmal_component_enable(self.encoder),
prefix="Unable to enable video encoder component")
