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import server
import folder_paths
import os
import subprocess
import re
import asyncio
from .utils import is_url, get_sorted_dir_files_from_directory, ffmpeg_path, \
validate_sequence, is_safe_path, strip_path, try_download_video, ENCODE_ARGS
from comfy.k_diffusion.utils import FolderOfImages
web = server.web
@server.PromptServer.instance.routes.get("/vhs/viewvideo")
@server.PromptServer.instance.routes.get("/viewvideo")
async def view_video(request):
query = request.rel_url.query
path_res = await resolve_path(query)
if isinstance(path_res, web.Response):
return path_res
file, filename, output_dir = path_res
if ffmpeg_path is None:
#Don't just return file, that provides arbitrary read access to any file
if is_safe_path(output_dir, strict=True):
return web.FileResponse(path=file)
frame_rate = query.get('frame_rate', 8)
if query.get('format', 'video') == "folder":
os.makedirs(folder_paths.get_temp_directory(), exist_ok=True)
concat_file = os.path.join(folder_paths.get_temp_directory(), "image_sequence_preview.txt")
skip_first_images = int(query.get('skip_first_images', 0))
select_every_nth = int(query.get('select_every_nth', 1)) or 1
valid_images = get_sorted_dir_files_from_directory(file, skip_first_images, select_every_nth, FolderOfImages.IMG_EXTENSIONS)
if len(valid_images) == 0:
return web.Response(status=400)
with open(concat_file, "w") as f:
f.write("ffconcat version 1.0\n")
for path in valid_images:
f.write("file '" + os.path.abspath(path) + "'\n")
f.write("duration 0.125\n")
in_args = ["-safe", "0", "-i", concat_file]
else:
in_args = ["-i", file]
if '%' in file:
in_args = ['-framerate', str(frame_rate)] + in_args
#Do prepass to pull info
#breaks skip_first frames if this default is ever actually needed
base_fps = 30
try:
proc = await asyncio.create_subprocess_exec(ffmpeg_path, *in_args, '-t',
'0','-f', 'null','-', stdout=subprocess.PIPE,
stderr=subprocess.PIPE, stdin=subprocess.DEVNULL)
_, res_stderr = await proc.communicate()
match = re.search(': Video: (\\w+) .+, (\\d+) fps,', res_stderr.decode(*ENCODE_ARGS))
if match:
base_fps = float(match.group(2))
if match.group(1) == 'vp9':
#force libvpx for transparency
in_args = ['-c:v', 'libvpx-vp9'] + in_args
except subprocess.CalledProcessError as e:
print("An error occurred in the ffmpeg prepass:\n" \
+ e.stderr.decode(*ENCODE_ARGS))
return web.Response(status=500)
vfilters = []
target_rate = float(query.get('force_rate', 0)) or base_fps
modified_rate = target_rate / float(query.get('select_every_nth',1) or 1)
start_time = 0
if 'start_time' in query:
start_time = float(query['start_time'])
elif int(query.get('skip_first_frames', 0)) > 0:
start_time = float(query.get('skip_first_frames'))/target_rate
if start_time > 1/modified_rate:
start_time += 1/modified_rate
if start_time > 0:
if start_time > 4:
post_seek = ['-ss', '4']
pre_seek = ['-ss', str(start_time - 4)]
else:
post_seek = ['-ss', str(start_time)]
pre_seek = []
else:
pre_seek = []
post_seek = []
args = [ffmpeg_path, "-v", "error"] + pre_seek + in_args + post_seek
if int(query.get('force_rate',0)) != 0:
args += ['-r', str(modified_rate)]
if query.get('force_size','Disabled') != "Disabled":
size = query['force_size'].split('x')
if size[0] == '?' or size[1] == '?':
size[0] = "-2" if size[0] == '?' else f"'min({size[0]},iw)'"
size[1] = "-2" if size[1] == '?' else f"'min({size[1]},ih)'"
else:
#Aspect ratio is likely changed. A more complex command is required
#to crop the output to the new aspect ratio
ar = float(size[0])/float(size[1])
vfilters.append(f"crop=if(gt({ar}\\,a)\\,iw\\,ih*{ar}):if(gt({ar}\\,a)\\,iw/{ar}\\,ih)")
size = ':'.join(size)
vfilters.append(f"scale={size}")
if len(vfilters) > 0:
args += ["-vf", ",".join(vfilters)]
if int(query.get('frame_load_cap', 0)) > 0:
args += ["-frames:v", query['frame_load_cap']]
#TODO:reconsider adding high frame cap/setting default frame cap on node
if query.get('deadline', 'realtime') == 'good':
deadline = 'good'
else:
deadline = 'realtime'
args += ['-c:v', 'libvpx-vp9','-deadline', deadline, '-cpu-used', '8', '-f', 'webm', '-']
try:
proc = await asyncio.create_subprocess_exec(*args, stdout=subprocess.PIPE,
stdin=subprocess.DEVNULL)
try:
resp = web.StreamResponse()
resp.content_type = 'video/webm'
resp.headers["Content-Disposition"] = f"filename=\"{filename}\""
await resp.prepare(request)
while len(bytes_read := await proc.stdout.read(2**20)) != 0:
await resp.write(bytes_read)
#Of dubious value given frequency of kill calls, but more correct
await proc.wait()
except (ConnectionResetError, ConnectionError) as e:
proc.kill()
except BrokenPipeError as e:
pass
return resp
query_cache = {}
@server.PromptServer.instance.routes.get("/vhs/queryvideo")
async def query_video(request):
query = request.rel_url.query
filepath = await resolve_path(query)
#TODO: cache lookup
if isinstance(filepath, web.Response):
return filepath
filepath = filepath[0]
if filepath.endswith(".webp"):
# ffmpeg doesn't support decoding animated WebP https://trac.ffmpeg.org/ticket/4907
return web.json_response({})
if filepath in query_cache and query_cache[filepath][0] == os.stat(filepath).st_mtime:
source = query_cache[filepath][1]
else:
args_dummy = [ffmpeg_path, "-i", filepath, '-c', 'copy', '-frames:v', '1', "-f", "null", "-"]
try:
dummy_res = subprocess.run(args_dummy, stdout=subprocess.DEVNULL,
stderr=subprocess.PIPE, check=True)
except subprocess.CalledProcessError as e:
raise Exception("An error occurred in the ffmpeg subprocess:\n" \
+ e.stderr.decode(*ENCODE_ARGS))
lines = dummy_res.stderr.decode(*ENCODE_ARGS)
source = {}
for line in lines.split('\n'):
match = re.search("^ *Stream .* Video.*, ([1-9]|\\d{2,})x(\\d+)", line)
if match is not None:
source['size'] = [int(match.group(1)), int(match.group(2))]
fps_match = re.search(", ([\\d\\.]+) fps", line)
if not fps_match:
return web.json_response({})
source['fps'] = float(fps_match.group(1))
if re.search("(yuva|rgba)", line):
source['alpha'] = True
break
else:
raise Exception("Failed to parse video/image information. FFMPEG output:\n" + lines)
durs_match = re.search("Duration: (\\d+:\\d+:\\d+\\.\\d+),", lines)
if not (durs_match and 'fps' in source):
return web.json_response({})
durs = durs_match.group(1).split(':')
duration = int(durs[0])*360 + int(durs[1])*60 + float(durs[2])
source['duration'] = duration
source['frames'] = int(duration*source['fps'])
query_cache[filepath] = (os.stat(filepath).st_mtime, source)
loaded = {}
if 'duration' not in source:
return web.json_response({})
loaded['duration'] = source['duration']
loaded['duration'] -= float(query.get('start_time',0))
loaded['fps'] = float(query.get('force_rate', 0)) or source['fps']
loaded['duration'] -= int(query.get('skip_first_frames', 0)) / loaded['fps']
loaded['fps'] /= int(query.get('select_every_nth', 1)) or 1
loaded['frames'] = loaded['duration'] * loaded['fps']
return web.json_response({'source': source, 'loaded': loaded})
async def resolve_path(query):
if "filename" not in query:
return web.Response(status=404)
filename = query["filename"]
#Path code misformats urls on windows and must be skipped
if is_url(filename):
file = await asyncio.to_thread(try_download_video, filename) or file
filname, output_dir = os.path.split(file)
return file, filename, output_dir
else:
filename, output_dir = folder_paths.annotated_filepath(filename)
type = query.get("type", "output")
if type == "path":
#special case for path_based nodes
#NOTE: output_dir may be empty, but non-None
output_dir, filename = os.path.split(strip_path(filename))
if output_dir is None:
output_dir = folder_paths.get_directory_by_type(type)
if output_dir is None:
return web.Response(status=400)
if not is_safe_path(output_dir):
return web.Response(status=403)
if "subfolder" in query:
output_dir = os.path.join(output_dir, query["subfolder"])
filename = os.path.basename(filename)
file = os.path.join(output_dir, filename)
if query.get('format', 'video') == 'folder':
if not os.path.isdir(file):
return web.Response(status=404)
else:
if not os.path.isfile(file) and not validate_sequence(file):
return web.Response(status=404)
return file, filename, output_dir
@server.PromptServer.instance.routes.get("/vhs/getpath")
@server.PromptServer.instance.routes.get("/getpath")
async def get_path(request):
query = request.rel_url.query
if "path" not in query:
return web.Response(status=404)
#NOTE: path always ends in `/`, so this is functionally an lstrip
path = os.path.abspath(strip_path(query["path"]))
if not os.path.exists(path) or not is_safe_path(path):
return web.json_response([])
#Use get so None is default instead of keyerror
valid_extensions = query.get("extensions")
valid_items = []
for item in os.scandir(path):
try:
if item.is_dir():
valid_items.append(item.name + "/")
continue
if valid_extensions is None or item.name.split(".")[-1].lower() in valid_extensions:
valid_items.append(item.name)
except OSError:
#Broken symlinks can throw a very unhelpful "Invalid argument"
pass
valid_items.sort(key=lambda f: os.stat(os.path.join(path,f)).st_mtime)
return web.json_response(valid_items)
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