gstreamer/ges/python/gesotioformatter.py

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#!/usr/bin/env python
# -*- Mode: Python -*-
# vi:si:et:sw=4:sts=4:ts=4
#
# Copyright (C) 2019 Igalia S.L
# Authors:
# Thibault Saunier <tsaunier@igalia.com>
#
import sys
import gi
import tempfile
gi.require_version("GES", "1.0")
gi.require_version("Gst", "1.0")
from gi.repository import GObject
from gi.repository import Gst
Gst.init(None)
from gi.repository import GES
from gi.repository import GLib
from collections import OrderedDict
import opentimelineio as otio
otio.adapters.from_name('xges')
class GESOtioFormatter(GES.Formatter):
def do_save_to_uri(self, timeline, uri, overwrite):
if not Gst.uri_is_valid(uri) or Gst.uri_get_protocol(uri) != "file":
Gst.error("Protocol not supported for file: %s" % uri)
return False
with tempfile.NamedTemporaryFile(suffix=".xges") as tmpxges:
timeline.get_asset().save(timeline, "file://" + tmpxges.name, None, overwrite)
linker = otio.media_linker.MediaLinkingPolicy.ForceDefaultLinker
otio_timeline = otio.adapters.read_from_file(tmpxges.name, "xges", media_linker_name=linker)
location = Gst.uri_get_location(uri)
out_adapter = otio.adapters.from_filepath(location)
otio.adapters.write_to_file(otio_timeline, Gst.uri_get_location(uri), out_adapter.name)
return True
def do_can_load_uri(self, uri):
try:
if not Gst.uri_is_valid(uri) or Gst.uri_get_protocol(uri) != "file":
return False
except GLib.Error as e:
Gst.error(str(e))
return False
if uri.endswith(".xges"):
return False
try:
return otio.adapters.from_filepath(Gst.uri_get_location(uri)) is not None
except Exception as e:
Gst.info("Could not load %s -> %s" % (uri, e))
return False
def do_load_from_uri(self, timeline, uri):
location = Gst.uri_get_location(uri)
in_adapter = otio.adapters.from_filepath(location)
assert(in_adapter) # can_load_uri should have ensured it is loadable
linker = otio.media_linker.MediaLinkingPolicy.ForceDefaultLinker
otio_timeline = otio.adapters.read_from_file(
location,
in_adapter.name,
media_linker_name=linker
)
with tempfile.NamedTemporaryFile(suffix=".xges") as tmpxges:
otio.adapters.write_to_file(otio_timeline, tmpxges.name, "xges")
formatter = GES.Formatter.get_default().extract()
timeline.get_asset().add_formatter(formatter)
return formatter.load_from_uri(timeline, "file://" + tmpxges.name)
GObject.type_register(GESOtioFormatter)
known_extensions_mimetype_map = [
("otio", "xml", "fcpxml"),
("application/vnd.pixar.opentimelineio+json", "application/vnd.apple-xmeml+xml", "application/vnd.apple-fcp+xml")
]
extensions = []
for adapter in otio.plugins.ActiveManifest().adapters:
if adapter.name != 'xges':
extensions.extend(adapter.suffixes)
extensions_mimetype_map = [[], []]
for i, ext in enumerate(known_extensions_mimetype_map[0]):
if ext in extensions:
extensions_mimetype_map[0].append(ext)
extensions_mimetype_map[1].append(known_extensions_mimetype_map[1][i])
extensions.remove(ext)
extensions_mimetype_map[0].extend(extensions)
GES.FormatterClass.register_metas(GESOtioFormatter, "otioformatter",
"GES Formatter using OpenTimelineIO",
','.join(extensions_mimetype_map[0]),
';'.join(extensions_mimetype_map[1]), 0.1, Gst.Rank.SECONDARY)