class Upload(VideoFilter):
"""
Uploads a stream to a hardware device
"""
filter = 'hwupload'
extra_hw_frames: int = param(default=64, init=False)
device: Device = param(skip=True)
def transform(self, *metadata: Meta) -> VideoMeta:
""" Marks a stream as uploaded to a device."""
meta = ensure_video(*metadata)
return replace(meta, device=self.device)
class SetPTS(AutoFilter):
"""
Change the PTS (presentation timestamp) of the input frames.
$ ffmpeg -y -i source.mp4 \
-vf trim=start=3:end=4,setpts=PTS-STARTPTS -an test.mp4
Supported cases for metadata handling:
* "PTS-STARTPTS" - resets stream start to zero.
"""
RESET_PTS = 'PTS-STARTPTS'
filter = 'setpts'
expr: str = param(default=RESET_PTS)
def transform(self, *metadata: Meta) -> Meta:
meta = metadata[0]
expr = self.expr.replace(' ', '')
if expr == self.RESET_PTS:
duration = meta.duration - meta.start
return replace(meta, start=TS(0), duration=duration)
raise NotImplementedError()
@property
def args(self) -> str:
return self.expr
class Scale(VideoFilter):
# noinspection PyUnresolvedReferences
"""
Video scaling filter.
:arg width: resulting video width
:arg height: resulting video height
"""
filter = "scale"
hardware = None # cpu only
width: int = param(name='w')
height: int = param(name='h')
def transform(self, *metadata: Meta) -> Meta:
meta = ensure_video(*metadata)
par = meta.dar / (self.width / self.height)
return replace(meta, width=self.width, height=self.height, par=par)
class Upload(VideoFilter):
"""
Uploads a stream to a hardware device
"""
filter = 'hwupload'
extra_hw_frames: int = param(default=64, init=False)
device: Device = param(skip=True)
def __post_init__(self) -> None:
if isinstance(self.device, dict):
# deserialize back after filter cloning
self.device = Device(**self.device)
super().__post_init__()
def transform(self, *metadata: Meta) -> VideoMeta:
""" Marks a stream as uploaded to a device."""
meta = ensure_video(*metadata)
return replace(meta, device=self.device)
class Format(VideoFilter):
"""
Converts pixel format of video stream
"""
filter = 'format'
format: str = param(name='pix_fmts')