Hi guys,
It seem to be another quite rare case but I’m trying to use wiretap api for the next verson of TimewarpML in order to avoid exporting sequences and importing it back.
I can read image data well but really struggle to create correct buffer in order to write one.
I do have a little code snippet that should create an 8-bit red square:
import os
import sys
from adsk.libwiretapPythonClientAPI import WireTapClient
from adsk.libwiretapPythonClientAPI import WireTapServerHandle
from adsk.libwiretapPythonClientAPI import WireTapNodeHandle
from adsk.libwiretapPythonClientAPI import WireTapStr
from adsk.libwiretapPythonClientAPI import WireTapInt
from adsk.libwiretapPythonClientAPI import WireTapClipFormat
import ctypes
import flame
# assuming you have numpy unpacked in /var/tmp/numpy
# one can just unzip wheel
sys.path.insert(0, '/var/tmp/numpy')
import numpy as np
del sys.path[0]
python_api = ctypes.CDLL(sys.executable)
python_api.PyUnicode_FromKindAndData.argtypes = [ctypes.c_int, ctypes.c_char_p, ctypes.c_ssize_t]
python_api.PyUnicode_FromKindAndData.restype = ctypes.py_object
class WireTapException(Exception):
def __init__(self, msg):
flame.messages.show_in_dialog(
title = 'flameTimewrarpML',
message = msg,
type = 'error',
buttons = ['Ok']
)
server_handle = WireTapServerHandle('localhost')
num_frames = 4
library = flame.projects.current_project.create_shared_library('twml')
parent_node_handle = WireTapNodeHandle(server_handle, flame.PyClip.get_wiretap_node_id(library))
new_clip_node_handle = WireTapNodeHandle()
clip_format = WireTapClipFormat(
24,
24, # width, height
3 * 8, # bits per pixel
3, # number of channels
24, # frame rate
1, # pixel ratio
WireTapClipFormat.ScanFormat.SCAN_FORMAT_PROGRESSIVE,
WireTapClipFormat.FORMAT_RGB(),
)
if not parent_node_handle.createClipNode(
"MyNewClip", # display name
clip_format, # clip format
"CLIP", # extended (server-specific) type
new_clip_node_handle, # created node returned here
):
raise WireTapException(
"Unable to create clip node: %s." % parent_node_handle.lastError()
)
if not new_clip_node_handle.setNumFrames(int(num_frames)):
raise WireTapException(
"Unable to set the number of frames: %s." % new_clip_node_handle.lastError()
)
new_fmt = WireTapClipFormat()
if not new_clip_node_handle.getClipFormat(new_fmt):
raise WireTapException(
"Unable to obtain clip format: %s." % new_clip_node_handle.lastError()
)
# array of red
pattern = np.array([0xff, 0x00, 0x00], dtype=np.uint8)
repeated_array = np.tile(pattern, new_fmt.frameBufferSize() // len(pattern))
remainder = new_fmt.frameBufferSize() % len(pattern)
if remainder > 0:
arr = np.concatenate([repeated_array,
np.zeros(remainder, dtype=np.uint8)])
for frame_number in range(0, num_frames):
# method 1
buff_out = str(arr.tobytes(), 'latin-1')
# method 2
buff_out = python_api.PyUnicode_FromKindAndData(ctypes.c_int(1), arr.tobytes(), arr.nbytes)
print (":".join("{:02x}".format(ord(c)) for c in buff_out))
if not new_clip_node_handle.writeFrame(frame_number, buff_out, new_fmt.frameBufferSize()):
raise WireTapException(
"Unable to obtain write frame %i: %s."
% (frame_number, new_clip_node_handle.lastError())
)
print("Successfully wrote frame %i." % frame_number)
And I’m getting quite interesting clip instead:
you can check it out assuming you have numpy installed or unpacked somewhere.
Giving it a buffer read from another clip works just well, but I need to be able to write an amended image data here.
Any ideas and help are greatly appreciated!
Thank you
Andriy,
