diff --git a/pype/lib.py b/pype/lib.py
index 2235efa2f4..ad3a863854 100644
--- a/pype/lib.py
+++ b/pype/lib.py
@@ -13,6 +13,62 @@ import avalon
 log = logging.getLogger(__name__)
 
 
+def get_paths_from_environ(env_key, return_first=False):
+    """Return existing paths from specific envirnment variable.
+
+    :param env_key: Environment key where should look for paths.
+    :type env_key: str
+    :param return_first: Return first path on `True`, list of all on `False`.
+    :type return_first: boolean
+
+    Difference when none of paths exists:
+    - when `return_first` is set to `False` then function returns empty list.
+    - when `return_first` is set to `True` then function returns `None`.
+    """
+
+    existing_paths = []
+    paths = os.environ.get(env_key) or ""
+    path_items = paths.split(os.pathsep)
+    for path in path_items:
+        # Skip empty string
+        if not path:
+            continue
+        # Normalize path
+        path = os.path.normpath(path)
+        # Check if path exists
+        if os.path.exists(path):
+            # Return path if `return_first` is set to True
+            if return_first:
+                return path
+            # Store path
+            existing_paths.append(path)
+
+    # Return None if none of paths exists
+    if return_first:
+        return None
+    # Return all existing paths from environment variable
+    return existing_paths
+
+
+def get_ffmpeg_tool_path(tool="ffmpeg"):
+    """Find path to ffmpeg tool in FFMPEG_PATH paths.
+
+    Function looks for tool in paths set in FFMPEG_PATH environment. If tool
+    exists then returns it's full path.
+
+    Returns tool name itself when tool path was not found. (FFmpeg path may be
+    set in PATH environment variable)
+    """
+
+    dir_paths = get_paths_from_environ("FFMPEG_PATH")
+    for dir_path in dir_paths:
+        for file_name in os.listdir(dir_path):
+            base, ext = os.path.splitext(file_name)
+            if base.lower() == tool.lower():
+                return os.path.join(dir_path, tool)
+    return tool
+
+
 # Special naming case for subprocess since its a built-in method.
 def _subprocess(*args, **kwargs):
     """Convenience method for getting output errors for subprocess."""
diff --git a/pype/plugins/ftrack/publish/collect_ftrack_api.py b/pype/plugins/ftrack/publish/collect_ftrack_api.py
index f79d74453b..0aad3b2433 100644
--- a/pype/plugins/ftrack/publish/collect_ftrack_api.py
+++ b/pype/plugins/ftrack/publish/collect_ftrack_api.py
@@ -35,7 +35,18 @@ class CollectFtrackApi(pyblish.api.ContextPlugin):
         # Find project entity
         project_query = 'Project where full_name is "{0}"'.format(project_name)
         self.log.debug("Project query: < {0} >".format(project_query))
-        project_entity = session.query(project_query).one()
+        project_entity = list(session.query(project_query).all())
+        if len(project_entity) == 0:
+            raise AssertionError(
+                "Project \"{0}\" not found in Ftrack.".format(project_name)
+            )
+        # QUESTION Is possible to happen?
+        elif len(project_entity) > 1:
+            raise AssertionError((
+                "Found more than one project with name \"{0}\" in Ftrack."
+            ).format(project_name))
+
+        project_entity = project_entity[0]
         self.log.debug("Project found: {0}".format(project_entity))
 
         # Find asset entity
@@ -44,7 +55,25 @@ class CollectFtrackApi(pyblish.api.ContextPlugin):
             ' and name is "{1}"'
         ).format(project_entity["id"], asset_name)
         self.log.debug("Asset entity query: < {0} >".format(entity_query))
-        asset_entity = session.query(entity_query).one()
+        asset_entities = []
+        for entity in session.query(entity_query).all():
+            # Skip tasks
+            if entity.entity_type.lower() != "task":
+                asset_entities.append(entity)
+
+        if len(asset_entities) == 0:
+            raise AssertionError((
+                "Entity with name \"{0}\" not found"
+                " in Ftrack project \"{1}\"."
+            ).format(asset_name, project_name))
+
+        elif len(asset_entities) > 1:
+            raise AssertionError((
+                "Found more than one entity with name \"{0}\""
+                " in Ftrack project \"{1}\"."
+            ).format(asset_name, project_name))
+
+        asset_entity = asset_entities[0]
         self.log.debug("Asset found: {0}".format(asset_entity))
 
         # Find task entity if task is set
@@ -53,8 +82,15 @@ class CollectFtrackApi(pyblish.api.ContextPlugin):
                 'Task where name is "{0}" and parent_id is "{1}"'
             ).format(task_name, asset_entity["id"])
             self.log.debug("Task entity query: < {0} >".format(task_query))
-            task_entity = session.query(task_query).one()
-            self.log.debug("Task entity found: {0}".format(task_entity))
+            task_entity = session.query(task_query).first()
+            if not task_entity:
+                self.log.warning(
+                    "Task entity with name \"{0}\" was not found.".format(
+                        task_name
+                    )
+                )
+            else:
+                self.log.debug("Task entity found: {0}".format(task_entity))
 
         else:
             task_entity = None
diff --git a/pype/plugins/global/publish/extract_jpeg.py b/pype/plugins/global/publish/extract_jpeg.py
index 0684d1e3ca..0b0e839529 100644
--- a/pype/plugins/global/publish/extract_jpeg.py
+++ b/pype/plugins/global/publish/extract_jpeg.py
@@ -2,6 +2,7 @@ import os
 
 import pyblish.api
 import pype.api
+import pype.lib
 
 
 class ExtractJpegEXR(pyblish.api.InstancePlugin):
@@ -56,9 +57,10 @@ class ExtractJpegEXR(pyblish.api.InstancePlugin):
             proj_name = os.environ.get('AVALON_PROJECT', '__default__')
             profile = config_data.get(proj_name, config_data['__default__'])
 
+            ffmpeg_path = pype.lib.get_ffmpeg_tool_path("ffmpeg")
+
             jpeg_items = []
-            jpeg_items.append(
-                os.path.join(os.environ.get("FFMPEG_PATH"), "ffmpeg"))
+            jpeg_items.append(ffmpeg_path)
             # override file if already exists
             jpeg_items.append("-y")
             # use same input args like with mov
diff --git a/pype/plugins/global/publish/extract_review.py b/pype/plugins/global/publish/extract_review.py
index 4d63e2c641..f5dba108c5 100644
--- a/pype/plugins/global/publish/extract_review.py
+++ b/pype/plugins/global/publish/extract_review.py
@@ -2,6 +2,7 @@ import os
 import pyblish.api
 import clique
 import pype.api
+import pype.lib
 
 
 class ExtractReview(pyblish.api.InstancePlugin):
@@ -40,6 +41,8 @@ class ExtractReview(pyblish.api.InstancePlugin):
         # get representation and loop them
         representations = inst_data["representations"]
 
+        ffmpeg_path = pype.lib.get_ffmpeg_tool_path("ffmpeg")
+
         # filter out mov and img sequences
         representations_new = representations[:]
         for repre in representations:
@@ -149,6 +152,9 @@ class ExtractReview(pyblish.api.InstancePlugin):
                 # necessary input data
                 # adds start arg only if image sequence
                 if isinstance(repre["files"], list):
+
+                    if start_frame != repre.get("detectedStart", start_frame):
+                        start_frame = repre.get("detectedStart")
                     input_args.append(
                         "-start_number {0} -framerate {1}".format(
                             start_frame, fps))
@@ -324,10 +330,7 @@ class ExtractReview(pyblish.api.InstancePlugin):
                         os.mkdir(stg_dir)
 
                 mov_args = [
-                    os.path.join(
-                        os.environ.get(
-                            "FFMPEG_PATH",
-                            ""), "ffmpeg"),
+                    ffmpeg_path,
                     " ".join(input_args),
                     " ".join(output_args)
                 ]
diff --git a/pype/plugins/global/publish/extract_review_slate.py b/pype/plugins/global/publish/extract_review_slate.py
index 9a720b77a9..699ed4a5eb 100644
--- a/pype/plugins/global/publish/extract_review_slate.py
+++ b/pype/plugins/global/publish/extract_review_slate.py
@@ -1,5 +1,6 @@
 import os
 import pype.api
+import pype.lib
 import pyblish
 
 
@@ -21,7 +22,7 @@ class ExtractReviewSlate(pype.api.Extractor):
 
         suffix = "_slate"
         slate_path = inst_data.get("slateFrame")
-        ffmpeg_path = os.path.join(os.environ.get("FFMPEG_PATH", ""), "ffmpeg")
+        ffmpeg_path = pype.lib.get_ffmpeg_tool_path("ffmpeg")
 
         to_width = 1920
         to_height = 1080
diff --git a/pype/plugins/global/publish/validate_ffmpeg_installed.py b/pype/plugins/global/publish/validate_ffmpeg_installed.py
index df7c330e95..f6738e6de1 100644
--- a/pype/plugins/global/publish/validate_ffmpeg_installed.py
+++ b/pype/plugins/global/publish/validate_ffmpeg_installed.py
@@ -1,13 +1,14 @@
 import pyblish.api
 import os
 import subprocess
+import pype.lib
 try:
     import os.errno as errno
 except ImportError:
     import errno
 
 
-class ValidateFfmpegInstallef(pyblish.api.Validator):
+class ValidateFFmpegInstalled(pyblish.api.Validator):
     """Validate availability of ffmpeg tool in PATH"""
 
     order = pyblish.api.ValidatorOrder
@@ -27,10 +28,8 @@ class ValidateFfmpegInstallef(pyblish.api.Validator):
         return True
 
     def process(self, instance):
-        self.log.info("ffmpeg path: `{}`".format(
-            os.environ.get("FFMPEG_PATH", "")))
-        if self.is_tool(
-                os.path.join(
-                    os.environ.get("FFMPEG_PATH", ""), "ffmpeg")) is False:
+        ffmpeg_path = pype.lib.get_ffmpeg_tool_path("ffmpeg")
+        self.log.info("ffmpeg path: `{}`".format(ffmpeg_path))
+        if self.is_tool(ffmpeg_path) is False:
             self.log.error("ffmpeg not found in PATH")
             raise RuntimeError('ffmpeg not installed.')
diff --git a/pype/plugins/maya/publish/validate_ass_relative_paths.py b/pype/plugins/maya/publish/validate_ass_relative_paths.py
new file mode 100644
index 0000000000..b0fd12a550
--- /dev/null
+++ b/pype/plugins/maya/publish/validate_ass_relative_paths.py
@@ -0,0 +1,97 @@
+import os
+import types
+
+import maya.cmds as cmds
+
+import pyblish.api
+import pype.api
+import pype.maya.action
+
+
+class ValidateAssRelativePaths(pyblish.api.InstancePlugin):
+    """Ensure exporting ass file has set relative texture paths"""
+
+    order = pype.api.ValidateContentsOrder
+    hosts = ['maya']
+    families = ['ass']
+    label = "ASS has relative texture paths"
+    actions = [pype.api.RepairAction]
+
+    def process(self, instance):
+        # we cannot ask this until user open render settings as
+        # `defaultArnoldRenderOptions` doesn't exists
+        try:
+            relative_texture = cmds.getAttr(
+                "defaultArnoldRenderOptions.absolute_texture_paths")
+            relative_procedural = cmds.getAttr(
+                "defaultArnoldRenderOptions.absolute_procedural_paths")
+            texture_search_path = cmds.getAttr(
+                "defaultArnoldRenderOptions.tspath"
+            )
+            procedural_search_path = cmds.getAttr(
+                "defaultArnoldRenderOptions.pspath"
+            )
+        except ValueError:
+            assert False, ("Can not validate, render setting were not opened "
+                           "yet so Arnold setting cannot be validate")
+
+        scene_dir, scene_basename = os.path.split(cmds.file(q=True, loc=True))
+        scene_name, _ = os.path.splitext(scene_basename)
+        project_root = "{}{}{}".format(
+            os.environ.get("AVALON_PROJECTS"),
+            os.path.sep,
+            os.environ.get("AVALON_PROJECT")
+        )
+        assert self.maya_is_true(relative_texture) is not True, \
+            ("Texture path is set to be absolute")
+        assert self.maya_is_true(relative_procedural) is not True, \
+            ("Procedural path is set to be absolute")
+
+        texture_search_path = texture_search_path.replace("\\", "/")
+        procedural_search_path = procedural_search_path.replace("\\", "/")
+        project_root = project_root.replace("\\", "/")
+
+        assert project_root in texture_search_path, \
+            ("Project root is not in texture_search_path")
+        assert project_root in procedural_search_path, \
+            ("Project root is not in procedural_search_path")
+
+    @classmethod
+    def repair(cls, instance):
+        texture_search_path = cmds.getAttr(
+            "defaultArnoldRenderOptions.tspath"
+        )
+        procedural_search_path = cmds.getAttr(
+            "defaultArnoldRenderOptions.pspath"
+        )
+
+        project_root = "{}{}{}".format(
+            os.environ.get("AVALON_PROJECTS"),
+            os.path.sep,
+            os.environ.get("AVALON_PROJECT"),
+        ).replace("\\", "/")
+
+        cmds.setAttr("defaultArnoldRenderOptions.tspath",
+                     project_root + os.pathsep + texture_search_path,
+                     type="string")
+        cmds.setAttr("defaultArnoldRenderOptions.pspath",
+                     project_root + os.pathsep + procedural_search_path,
+                     type="string")
+        cmds.setAttr("defaultArnoldRenderOptions.absolute_procedural_paths",
+                     False)
+        cmds.setAttr("defaultArnoldRenderOptions.absolute_texture_paths",
+                     False)
+
+    def maya_is_true(self, attr_val):
+        """
+        Whether a Maya attr evaluates to True.
+        When querying an attribute value from an ambiguous object the
+        Maya API will return a list of values, which need to be properly
+        handled to evaluate properly.
+        """
+        if isinstance(attr_val, types.BooleanType):
+            return attr_val
+        elif isinstance(attr_val, (types.ListType, types.GeneratorType)):
+            return any(attr_val)
+        else:
+            return bool(attr_val)
diff --git a/pype/plugins/standalonepublisher/publish/extract_review.py b/pype/plugins/standalonepublisher/publish/extract_review.py
index f06d9bcde0..66cdcdf4df 100644
--- a/pype/plugins/standalonepublisher/publish/extract_review.py
+++ b/pype/plugins/standalonepublisher/publish/extract_review.py
@@ -4,6 +4,7 @@ import tempfile
 import pyblish.api
 import clique
 import pype.api
+import pype.lib
 
 
 class ExtractReviewSP(pyblish.api.InstancePlugin):
@@ -148,12 +149,7 @@ class ExtractReviewSP(pyblish.api.InstancePlugin):
                 # output filename
                 output_args.append(full_output_path)
 
-                ffmpeg_path = os.getenv("FFMPEG_PATH", "")
-                if ffmpeg_path:
-                    ffmpeg_path += "/ffmpeg"
-                else:
-                    ffmpeg_path = "ffmpeg"
-
+                ffmpeg_path = pype.lib.get_ffmpeg_tool_path("ffmpeg")
                 mov_args = [
                     ffmpeg_path,
                     " ".join(input_args),
diff --git a/pype/plugins/standalonepublisher/publish/extract_thumbnail.py b/pype/plugins/standalonepublisher/publish/extract_thumbnail.py
index 69a2e0fdad..daa3936359 100644
--- a/pype/plugins/standalonepublisher/publish/extract_thumbnail.py
+++ b/pype/plugins/standalonepublisher/publish/extract_thumbnail.py
@@ -3,6 +3,7 @@ import tempfile
 import subprocess
 import pyblish.api
 import pype.api
+import pype.lib
 
 
 class ExtractThumbnailSP(pyblish.api.InstancePlugin):
@@ -73,11 +74,7 @@ class ExtractThumbnailSP(pyblish.api.InstancePlugin):
                 config_data.get("__default__", {})
             )
 
-            ffmpeg_path = os.getenv("FFMPEG_PATH", "")
-            if ffmpeg_path:
-                ffmpeg_path += "/ffmpeg"
-            else:
-                ffmpeg_path = "ffmpeg"
+            ffmpeg_path = pype.lib.get_ffmpeg_tool_path("ffmpeg")
 
             jpeg_items = []
             jpeg_items.append(ffmpeg_path)
diff --git a/pype/scripts/otio_burnin.py b/pype/scripts/otio_burnin.py
index c61ea66d2d..7a724e22bf 100644
--- a/pype/scripts/otio_burnin.py
+++ b/pype/scripts/otio_burnin.py
@@ -1,33 +1,27 @@
 import os
 import sys
 import re
-import datetime
 import subprocess
 import json
 import opentimelineio_contrib.adapters.ffmpeg_burnins as ffmpeg_burnins
 from pypeapp.lib import config
-from pype import api as pype
-from subprocess import Popen, PIPE
-# FFmpeg in PATH is required
+from pypeapp import Logger
+import pype.lib
+
+log = Logger().get_logger("BurninWrapper", "burninwrap")
 
 
-log = pype.Logger().get_logger("BurninWrapper", "burninwrap")
+ffmpeg_path = pype.lib.get_ffmpeg_tool_path("ffmpeg")
+ffprobe_path = pype.lib.get_ffmpeg_tool_path("ffprobe")
 
 
-ffmpeg_path = os.environ.get("FFMPEG_PATH")
-if ffmpeg_path and os.path.exists(ffmpeg_path):
-    # add separator "/" or "\" to be prepared for next part
-    ffmpeg_path += os.path.sep
-else:
-    ffmpeg_path = ""
-
 FFMPEG = (
     '{} -loglevel panic -i %(input)s %(filters)s %(args)s%(output)s'
-).format(os.path.normpath(ffmpeg_path + "ffmpeg"))
+).format(ffmpeg_path)
 
 FFPROBE = (
     '{} -v quiet -print_format json -show_format -show_streams %(source)s'
-).format(os.path.normpath(ffmpeg_path + "ffprobe"))
+).format(ffprobe_path)
 
 DRAWTEXT = (
     "drawtext=text=\\'%(text)s\\':x=%(x)s:y=%(y)s:fontcolor="
@@ -41,6 +35,7 @@ TIMECODE = (
 
 MISSING_KEY_VALUE = "N/A"
 CURRENT_FRAME_KEY = "{current_frame}"
+CURRENT_FRAME_SPLITTER = "_-_CURRENT_FRAME_-_"
 TIME_CODE_KEY = "{timecode}"
 
 
@@ -136,7 +131,9 @@ class ModifiedBurnins(ffmpeg_burnins.Burnins):
         if options_init:
             self.options_init.update(options_init)
 
-    def add_text(self, text, align, frame_start=None, options=None):
+    def add_text(
+        self, text, align, frame_start=None, frame_end=None, options=None
+    ):
         """
         Adding static text to a filter.
 
@@ -152,11 +149,15 @@ class ModifiedBurnins(ffmpeg_burnins.Burnins):
         if frame_start:
             options["frame_offset"] = frame_start
 
+        # `frame_end` is only for meassurements of text position
+        if frame_end:
+            options["frame_end"] = frame_end
+
         self._add_burnin(text, align, options, DRAWTEXT)
 
     def add_timecode(
-        self, align, frame_start=None, frame_start_tc=None, text=None,
-        options=None
+        self, align, frame_start=None, frame_end=None, frame_start_tc=None,
+        text=None, options=None
     ):
         """
         Convenience method to create the frame number expression.
@@ -174,6 +175,10 @@ class ModifiedBurnins(ffmpeg_burnins.Burnins):
         if frame_start:
             options["frame_offset"] = frame_start
 
+        # `frame_end` is only for meassurements of text position
+        if frame_end:
+            options["frame_end"] = frame_end
+
         if not frame_start_tc:
             frame_start_tc = options["frame_offset"]
 
@@ -197,10 +202,31 @@ class ModifiedBurnins(ffmpeg_burnins.Burnins):
         :param enum align: alignment, must use provided enum flags
         :param dict options:
         """
+
+        final_text = text
+        text_for_size = text
+        if CURRENT_FRAME_SPLITTER in text:
+            frame_start = options["frame_offset"]
+            frame_end = options.get("frame_end", frame_start)
+            if not frame_start:
+                replacement_final = replacement_size = str(MISSING_KEY_VALUE)
+            else:
+                replacement_final = "\\'{}\\'".format(
+                    r'%%{eif\:n+%d\:d}' % frame_start
+                )
+                replacement_size = str(frame_end)
+
+            final_text = final_text.replace(
+                CURRENT_FRAME_SPLITTER, replacement_final
+            )
+            text_for_size = text_for_size.replace(
+                CURRENT_FRAME_SPLITTER, replacement_size
+            )
+
         resolution = self.resolution
         data = {
             'text': (
-                text
+                final_text
                 .replace(",", r"\,")
                 .replace(':', r'\:')
             ),
@@ -208,7 +234,7 @@ class ModifiedBurnins(ffmpeg_burnins.Burnins):
             'size': options['font_size']
         }
         timecode_text = options.get("timecode") or ""
-        text_for_size = text + timecode_text
+        text_for_size += timecode_text
         data.update(options)
         data.update(
             ffmpeg_burnins._drawtext(align, resolution, text_for_size, options)
@@ -272,7 +298,7 @@ class ModifiedBurnins(ffmpeg_burnins.Burnins):
         )
         print(command)
 
-        proc = Popen(command, shell=True)
+        proc = subprocess.Popen(command, shell=True)
         proc.communicate()
         if proc.returncode != 0:
             raise RuntimeError("Failed to render '%s': %s'"
@@ -368,6 +394,7 @@ def burnins_from_data(
     burnin = ModifiedBurnins(input_path, options_init=options_init)
 
     frame_start = data.get("frame_start")
+    frame_end = data.get("frame_end")
     frame_start_tc = data.get('frame_start_tc', frame_start)
 
     stream = burnin._streams[0]
@@ -382,7 +409,7 @@ def burnins_from_data(
 
     # Check frame start and add expression if is available
     if frame_start is not None:
-        data[CURRENT_FRAME_KEY[1:-1]] = r'%%{eif\:n+%d\:d}' % frame_start
+        data[CURRENT_FRAME_KEY[1:-1]] = CURRENT_FRAME_SPLITTER
 
     if frame_start_tc is not None:
         data[TIME_CODE_KEY[1:-1]] = TIME_CODE_KEY
@@ -432,7 +459,7 @@ def burnins_from_data(
 
         # Handle timecode differently
         if has_timecode:
-            args = [align, frame_start, frame_start_tc]
+            args = [align, frame_start, frame_end, frame_start_tc]
             if not value.startswith(TIME_CODE_KEY):
                 value_items = value.split(TIME_CODE_KEY)
                 text = value_items[0].format(**data)
@@ -442,7 +469,7 @@ def burnins_from_data(
             continue
 
         text = value.format(**data)
-        burnin.add_text(text, align, frame_start)
+        burnin.add_text(text, align, frame_start, frame_end)
 
     codec_args = ""
     if codec_data:
diff --git a/pype/standalonepublish/widgets/widget_drop_frame.py b/pype/standalonepublish/widgets/widget_drop_frame.py
index 73b9f0e179..c85105a333 100644
--- a/pype/standalonepublish/widgets/widget_drop_frame.py
+++ b/pype/standalonepublish/widgets/widget_drop_frame.py
@@ -4,6 +4,7 @@ import json
 import clique
 import subprocess
 from pypeapp import config
+import pype.lib
 from . import QtWidgets, QtCore
 from . import DropEmpty, ComponentsList, ComponentItem
 
@@ -224,12 +225,7 @@ class DropDataFrame(QtWidgets.QFrame):
         self._process_data(data)
 
     def load_data_with_probe(self, filepath):
-        ffprobe_path = os.getenv("FFMPEG_PATH", "")
-        if ffprobe_path:
-            ffprobe_path += '/ffprobe'
-        else:
-            ffprobe_path = 'ffprobe'
-
+        ffprobe_path = pype.lib.get_ffmpeg_tool_path("ffprobe")
         args = [
             ffprobe_path,
             '-v', 'quiet',