feat: update changelog for version 1.4.7

Add new session utility with curl_cffi support for anti-bot protection
Update all manifest parsers (DASH, HLS, ISM, M3U8) to accept curl_cffi sessions
Add browser impersonation support (Chrome, Firefox, Safari)
Fix cookie handling compatibility between requests and curl_cffi
Suppress HTTPS proxy warnings for better UX
Maintain full backward compatibility with requests.Session

CHANGELOG.md

@@ -5,6 +5,41 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.4.7] - 2025-09-25
+
+### Added
+
+- **curl_cffi Session Support**: Enhanced anti-bot protection with browser impersonation
+  - Added new session utility with curl_cffi support for bypassing anti-bot measures
+  - Browser impersonation support for Chrome, Firefox, and Safari user agents
+  - Full backward compatibility with requests.Session maintained
+  - Suppressed HTTPS proxy warnings for improved user experience
+- **Download Retry Functionality**: Configurable retry mechanism for failed downloads
+  - Added retry count option to download function for improved reliability
+- **Subtitle Requirements Options**: Enhanced subtitle download control
+  - Added options for required subtitles in download command
+  - Better control over subtitle track selection and requirements
+- **Quality Selection Enhancement**: Improved quality selection options
+  - Added best available quality option in download command for optimal track selection
+- **DecryptLabs API Integration**: Enhanced remote CDM configuration
+  - Added decrypt_labs_api_key to Config initialization for better API integration
+
+### Changed
+
+- **Manifest Parser Updates**: Enhanced compatibility across all parsers
+  - Updated DASH, HLS, ISM, and M3U8 parsers to accept curl_cffi sessions
+  - Improved cookie handling compatibility between requests and curl_cffi
+- **Logging Improvements**: Reduced log verbosity for better user experience
+  - Changed duplicate track log level to debug to reduce console noise
+  - Dynamic CDM selection messages moved to debug-only output
+
+### Fixed
+
+- **Remote CDM Reuse**: Fixed KeyError in dynamic CDM selection
+  - Prevents KeyError when reusing remote CDMs in dynamic selection process
+  - Creates copy of CDM dictionary before modification to prevent configuration mutation
+  - Allows same CDM to be selected multiple times within session without errors
+
 ## [1.4.6] - 2025-09-13
 
 ### Added

unshackle/commands/dl.py

@@ -173,6 +173,12 @@ class dl:
         help="Language wanted for Audio, overrides -l/--lang for audio tracks.",
     )
     @click.option("-sl", "--s-lang", type=LANGUAGE_RANGE, default=["all"], help="Language wanted for Subtitles.")
+    @click.option(
+        "--require-subs",
+        type=LANGUAGE_RANGE,
+        default=[],
+        help="Required subtitle languages. Downloads all subtitles only if these languages exist. Cannot be used with --s-lang.",
+    )
     @click.option("-fs", "--forced-subs", is_flag=True, default=False, help="Include forced subtitle tracks.")
     @click.option(
         "--proxy",
@@ -263,6 +269,13 @@ class dl:
     @click.option(
         "--reset-cache", "reset_cache", is_flag=True, default=False, help="Clear title cache before fetching."
     )
+    @click.option(
+        "--best-available",
+        "best_available",
+        is_flag=True,
+        default=False,
+        help="Continue with best available quality if requested resolutions are not available.",
+    )
     @click.pass_context
     def cli(ctx: click.Context, **kwargs: Any) -> dl:
         return dl(ctx, **kwargs)
@@ -322,6 +335,16 @@ class dl:
                 vault_copy = vault.copy()
                 del vault_copy["type"]
 
+                if vault_type.lower() == "api" and "decrypt_labs" in vault_name.lower():
+                    if "token" not in vault_copy or not vault_copy["token"]:
+                        if config.decrypt_labs_api_key:
+                            vault_copy["token"] = config.decrypt_labs_api_key
+                        else:
+                            self.log.warning(
+                                f"No token provided for DecryptLabs vault '{vault_name}' and no global "
+                                "decrypt_labs_api_key configured"
+                            )
+
                 if vault_type.lower() == "sqlite":
                     try:
                         self.vaults.load_critical(vault_type, **vault_copy)
@@ -442,6 +465,7 @@ class dl:
         v_lang: list[str],
         a_lang: list[str],
         s_lang: list[str],
+        require_subs: list[str],
         forced_subs: bool,
         sub_format: Optional[Subtitle.Codec],
         video_only: bool,
@@ -462,6 +486,7 @@ class dl:
         no_source: bool,
         workers: Optional[int],
         downloads: int,
+        best_available: bool,
         *_: Any,
         **__: Any,
     ) -> None:
@@ -469,6 +494,10 @@ class dl:
         self.search_source = None
         start_time = time.time()
 
+        if require_subs and s_lang != ["all"]:
+            self.log.error("--require-subs and --s-lang cannot be used together")
+            sys.exit(1)
+
         # Check if dovi_tool is available when hybrid mode is requested
         if any(r == Video.Range.HYBRID for r in range_):
             from unshackle.core.binaries import DoviTool
@@ -703,6 +732,12 @@ class dl:
                                 res_list = ", ".join([f"{x}p" for x in missing_resolutions[:-1]]) + " or "
                             res_list = f"{res_list}{missing_resolutions[-1]}p"
                             plural = "s" if len(missing_resolutions) > 1 else ""
+
+                            if best_available:
+                                self.log.warning(
+                                    f"There's no {res_list} Video Track{plural}, continuing with available qualities..."
+                                )
+                            else:
                                 self.log.error(f"There's no {res_list} Video Track{plural}...")
                                 sys.exit(1)
 
@@ -740,7 +775,21 @@ class dl:
                         title.tracks.videos = selected_videos
 
                     # filter subtitle tracks
-                    if s_lang and "all" not in s_lang:
+                    if require_subs:
+                        missing_langs = [
+                            lang
+                            for lang in require_subs
+                            if not any(is_close_match(lang, [sub.language]) for sub in title.tracks.subtitles)
+                        ]
+
+                        if missing_langs:
+                            self.log.error(f"Required subtitle language(s) not found: {', '.join(missing_langs)}")
+                            sys.exit(1)
+
+                        self.log.info(
+                            f"Required languages found ({', '.join(require_subs)}), downloading all available subtitles"
+                        )
+                    elif s_lang and "all" not in s_lang:
                         missing_langs = [
                             lang_
                             for lang_ in s_lang
@@ -880,7 +929,7 @@ class dl:
                             self.service, self.profile, drm="widevine", quality=highest_quality
                         )
                         if quality_based_cdm and quality_based_cdm != self.cdm:
-                            self.log.info(
+                            self.log.debug(
                                 f"Pre-selecting Widevine CDM based on highest quality {highest_quality}p across all video tracks"
                             )
                             self.cdm = quality_based_cdm
@@ -891,7 +940,7 @@ class dl:
                             self.service, self.profile, drm="playready", quality=highest_quality
                         )
                         if quality_based_cdm and quality_based_cdm != self.cdm:
-                            self.log.info(
+                            self.log.debug(
                                 f"Pre-selecting PlayReady CDM based on highest quality {highest_quality}p across all video tracks"
                             )
                             self.cdm = quality_based_cdm
@@ -1515,6 +1564,9 @@ class dl:
 
     @staticmethod
     def save_cookies(path: Path, cookies: CookieJar):
+        if hasattr(cookies, 'jar'):
+            cookies = cookies.jar
+
         cookie_jar = MozillaCookieJar(path)
         cookie_jar.load()
         for cookie in cookies:
@@ -1583,31 +1635,31 @@ class dl:
                 for key in quality_keys:
                     if key.isdigit() and quality == int(key):
                         quality_match = cdm_name[key]
-                        self.log.info(f"Selected CDM based on exact quality match {quality}p: {quality_match}")
+                        self.log.debug(f"Selected CDM based on exact quality match {quality}p: {quality_match}")
                         break
                     elif key.startswith(">="):
                         threshold = int(key[2:])
                         if quality >= threshold:
                             quality_match = cdm_name[key]
-                            self.log.info(f"Selected CDM based on quality {quality}p >= {threshold}p: {quality_match}")
+                            self.log.debug(f"Selected CDM based on quality {quality}p >= {threshold}p: {quality_match}")
                             break
                     elif key.startswith(">"):
                         threshold = int(key[1:])
                         if quality > threshold:
                             quality_match = cdm_name[key]
-                            self.log.info(f"Selected CDM based on quality {quality}p > {threshold}p: {quality_match}")
+                            self.log.debug(f"Selected CDM based on quality {quality}p > {threshold}p: {quality_match}")
                             break
                     elif key.startswith("<="):
                         threshold = int(key[2:])
                         if quality <= threshold:
                             quality_match = cdm_name[key]
-                            self.log.info(f"Selected CDM based on quality {quality}p <= {threshold}p: {quality_match}")
+                            self.log.debug(f"Selected CDM based on quality {quality}p <= {threshold}p: {quality_match}")
                             break
                     elif key.startswith("<"):
                         threshold = int(key[1:])
                         if quality < threshold:
                             quality_match = cdm_name[key]
-                            self.log.info(f"Selected CDM based on quality {quality}p < {threshold}p: {quality_match}")
+                            self.log.debug(f"Selected CDM based on quality {quality}p < {threshold}p: {quality_match}")
                             break
 
                 if quality_match:
@@ -1630,13 +1682,22 @@ class dl:
                 if not cdm_name:
                     return None
 
-        cdm_api = next(iter(x for x in config.remote_cdm if x["name"] == cdm_name), None)
+        cdm_api = next(iter(x.copy() for x in config.remote_cdm if x["name"] == cdm_name), None)
         if cdm_api:
             is_decrypt_lab = True if cdm_api.get("type") == "decrypt_labs" else False
             if is_decrypt_lab:
                 del cdm_api["name"]
                 del cdm_api["type"]
 
+                if "secret" not in cdm_api or not cdm_api["secret"]:
+                    if config.decrypt_labs_api_key:
+                        cdm_api["secret"] = config.decrypt_labs_api_key
+                    else:
+                        raise ValueError(
+                            f"No secret provided for DecryptLabs CDM '{cdm_name}' and no global "
+                            "decrypt_labs_api_key configured"
+                        )
+
                 # All DecryptLabs CDMs use DecryptLabsRemoteCDM
                 return DecryptLabsRemoteCDM(service_name=service, vaults=self.vaults, **cdm_api)
             else:

unshackle/core/__init__.py

@@ -1 +1 @@
-__version__ = "1.4.6"
+__version__ = "1.4.7"

unshackle/core/config.py

@@ -88,6 +88,7 @@ class Config:
         self.tag_group_name: bool = kwargs.get("tag_group_name", True)
         self.tag_imdb_tmdb: bool = kwargs.get("tag_imdb_tmdb", True)
         self.tmdb_api_key: str = kwargs.get("tmdb_api_key") or ""
+        self.decrypt_labs_api_key: str = kwargs.get("decrypt_labs_api_key") or ""
         self.update_checks: bool = kwargs.get("update_checks", True)
         self.update_check_interval: int = kwargs.get("update_check_interval", 24)
         self.scene_naming: bool = kwargs.get("scene_naming", True)

unshackle/core/downloaders/n_m3u8dl_re.py

@@ -150,6 +150,7 @@ def download(
 
     track_type = track.__class__.__name__
     thread_count = str(config.n_m3u8dl_re.get("thread_count", max_workers))
+    retry_count = str(config.n_m3u8dl_re.get("retry_count", max_workers))
     ad_keyword = config.n_m3u8dl_re.get("ad_keyword")
 
     arguments = [
@@ -160,6 +161,8 @@ def download(
         output_dir,
         "--thread-count",
         thread_count,
+        "--download-retry-count",
+        retry_count,
         "--no-log",
         "--write-meta-json",
         "false",

unshackle/core/drm/clearkey.py

@@ -8,6 +8,7 @@ from urllib.parse import urljoin
 
 from Cryptodome.Cipher import AES
 from Cryptodome.Util.Padding import unpad
+from curl_cffi.requests import Session as CurlSession
 from m3u8.model import Key
 from requests import Session
 
@@ -69,8 +70,8 @@ class ClearKey:
         """
         if not isinstance(m3u_key, Key):
             raise ValueError(f"Provided M3U Key is in an unexpected type {m3u_key!r}")
-        if not isinstance(session, (Session, type(None))):
+        if not isinstance(session, (Session, CurlSession, type(None))):
-            raise TypeError(f"Expected session to be a {Session}, not a {type(session)}")
+            raise TypeError(f"Expected session to be a {Session} or {CurlSession}, not a {type(session)}")
 
         if not m3u_key.method.startswith("AES"):
             raise ValueError(f"Provided M3U Key is not an AES Clear Key, {m3u_key.method}")

unshackle/core/manifests/dash.py

@@ -15,6 +15,7 @@ from uuid import UUID
 from zlib import crc32
 
 import requests
+from curl_cffi.requests import Session as CurlSession
 from langcodes import Language, tag_is_valid
 from lxml.etree import Element, ElementTree
 from pyplayready.system.pssh import PSSH as PR_PSSH
@@ -47,7 +48,7 @@ class DASH:
         self.url = url
 
     @classmethod
-    def from_url(cls, url: str, session: Optional[Session] = None, **args: Any) -> DASH:
+    def from_url(cls, url: str, session: Optional[Union[Session, CurlSession]] = None, **args: Any) -> DASH:
         if not url:
             raise requests.URLRequired("DASH manifest URL must be provided for relative path computations.")
         if not isinstance(url, str):
@@ -55,8 +56,8 @@ class DASH:
 
         if not session:
             session = Session()
-        elif not isinstance(session, Session):
+        elif not isinstance(session, (Session, CurlSession)):
-            raise TypeError(f"Expected session to be a {Session}, not {session!r}")
+            raise TypeError(f"Expected session to be a {Session} or {CurlSession}, not {session!r}")
 
         res = session.get(url, **args)
         if res.url != url:
@@ -103,6 +104,10 @@ class DASH:
                 continue
             if next(iter(period.xpath("SegmentType/@value")), "content") != "content":
                 continue
+            if "urn:amazon:primevideo:cachingBreadth" in [
+                x.get("schemeIdUri") for x in period.findall("SupplementalProperty")
+            ]:
+                continue
 
             for adaptation_set in period.findall("AdaptationSet"):
                 if self.is_trick_mode(adaptation_set):

unshackle/core/manifests/hls.py

@@ -14,9 +14,10 @@ from typing import Any, Callable, Optional, Union
 from urllib.parse import urljoin
 from zlib import crc32
 
-import httpx
 import m3u8
 import requests
+from curl_cffi.requests import Response as CurlResponse
+from curl_cffi.requests import Session as CurlSession
 from langcodes import Language, tag_is_valid
 from m3u8 import M3U8
 from pyplayready.cdm import Cdm as PlayReadyCdm
@@ -35,7 +36,7 @@ from unshackle.core.utilities import get_extension, is_close_match, try_ensure_u
 
 
 class HLS:
-    def __init__(self, manifest: M3U8, session: Optional[Union[Session, httpx.Client]] = None):
+    def __init__(self, manifest: M3U8, session: Optional[Union[Session, CurlSession]] = None):
         if not manifest:
             raise ValueError("HLS manifest must be provided.")
         if not isinstance(manifest, M3U8):
@@ -47,7 +48,7 @@ class HLS:
         self.session = session or Session()
 
     @classmethod
-    def from_url(cls, url: str, session: Optional[Union[Session, httpx.Client]] = None, **args: Any) -> HLS:
+    def from_url(cls, url: str, session: Optional[Union[Session, CurlSession]] = None, **args: Any) -> HLS:
         if not url:
             raise requests.URLRequired("HLS manifest URL must be provided.")
         if not isinstance(url, str):
@@ -55,22 +56,22 @@ class HLS:
 
         if not session:
             session = Session()
-        elif not isinstance(session, (Session, httpx.Client)):
+        elif not isinstance(session, (Session, CurlSession)):
-            raise TypeError(f"Expected session to be a {Session} or {httpx.Client}, not {session!r}")
+            raise TypeError(f"Expected session to be a {Session} or {CurlSession}, not {session!r}")
 
         res = session.get(url, **args)
 
-        # Handle both requests and httpx response objects
+        # Handle requests and curl_cffi response objects
         if isinstance(res, requests.Response):
             if not res.ok:
                 raise requests.ConnectionError("Failed to request the M3U(8) document.", response=res)
             content = res.text
-        elif isinstance(res, httpx.Response):
+        elif isinstance(res, CurlResponse):
-            if res.status_code >= 400:
+            if not res.ok:
                 raise requests.ConnectionError("Failed to request the M3U(8) document.", response=res)
             content = res.text
         else:
-            raise TypeError(f"Expected response to be a requests.Response or httpx.Response, not {type(res)}")
+            raise TypeError(f"Expected response to be a requests.Response or curl_cffi.Response, not {type(res)}")
 
         master = m3u8.loads(content, uri=url)
 
@@ -229,7 +230,7 @@ class HLS:
         save_path: Path,
         save_dir: Path,
         progress: partial,
-        session: Optional[Union[Session, httpx.Client]] = None,
+        session: Optional[Union[Session, CurlSession]] = None,
         proxy: Optional[str] = None,
         max_workers: Optional[int] = None,
         license_widevine: Optional[Callable] = None,
@@ -238,15 +239,13 @@ class HLS:
     ) -> None:
         if not session:
             session = Session()
-        elif not isinstance(session, (Session, httpx.Client)):
+        elif not isinstance(session, (Session, CurlSession)):
-            raise TypeError(f"Expected session to be a {Session} or {httpx.Client}, not {session!r}")
+            raise TypeError(f"Expected session to be a {Session} or {CurlSession}, not {session!r}")
 
         if proxy:
             # Handle proxies differently based on session type
             if isinstance(session, Session):
                 session.proxies.update({"all": proxy})
-            elif isinstance(session, httpx.Client):
-                session.proxies = {"http://": proxy, "https://": proxy}
 
         log = logging.getLogger("HLS")
 
@@ -257,13 +256,8 @@ class HLS:
                 log.error(f"Failed to request the invariant M3U8 playlist: {response.status_code}")
                 sys.exit(1)
             playlist_text = response.text
-        elif isinstance(response, httpx.Response):
-            if response.status_code >= 400:
-                log.error(f"Failed to request the invariant M3U8 playlist: {response.status_code}")
-                sys.exit(1)
-            playlist_text = response.text
         else:
-            raise TypeError(f"Expected response to be a requests.Response or httpx.Response, not {type(response)}")
+            raise TypeError(f"Expected response to be a requests.Response or curl_cffi.Response, not {type(response)}")
 
         master = m3u8.loads(playlist_text, uri=track.url)
 
@@ -533,13 +527,9 @@ class HLS:
                         if isinstance(res, requests.Response):
                             res.raise_for_status()
                             init_content = res.content
-                        elif isinstance(res, httpx.Response):
-                            if res.status_code >= 400:
-                                raise requests.HTTPError(f"HTTP Error: {res.status_code}", response=res)
-                            init_content = res.content
                         else:
                             raise TypeError(
-                                f"Expected response to be requests.Response or httpx.Response, not {type(res)}"
+                                f"Expected response to be requests.Response or curl_cffi.Response, not {type(res)}"
                             )
 
                         map_data = (segment.init_section, init_content)
@@ -707,7 +697,7 @@ class HLS:
 
     @staticmethod
     def parse_session_data_keys(
-        manifest: M3U8, session: Optional[Union[Session, httpx.Client]] = None
+        manifest: M3U8, session: Optional[Union[Session, CurlSession]] = None
     ) -> list[m3u8.model.Key]:
         """Parse `com.apple.hls.keys` session data and return Key objects."""
         keys: list[m3u8.model.Key] = []
@@ -798,7 +788,8 @@ class HLS:
 
     @staticmethod
     def get_drm(
-        key: Union[m3u8.model.SessionKey, m3u8.model.Key], session: Optional[Union[Session, httpx.Client]] = None
+        key: Union[m3u8.model.SessionKey, m3u8.model.Key],
+        session: Optional[Union[Session, CurlSession]] = None,
     ) -> DRM_T:
         """
         Convert HLS EXT-X-KEY data to an initialized DRM object.
@@ -810,8 +801,8 @@ class HLS:
 
         Raises a NotImplementedError if the key system is not supported.
         """
-        if not isinstance(session, (Session, httpx.Client, type(None))):
+        if not isinstance(session, (Session, CurlSession, type(None))):
-            raise TypeError(f"Expected session to be a {Session} or {httpx.Client}, not {type(session)}")
+            raise TypeError(f"Expected session to be a {Session} or {CurlSession}, not {type(session)}")
         if not session:
             session = Session()
 

unshackle/core/manifests/ism.py

@@ -10,6 +10,7 @@ from pathlib import Path
 from typing import Any, Callable, Optional, Union
 
 import requests
+from curl_cffi.requests import Session as CurlSession
 from langcodes import Language, tag_is_valid
 from lxml.etree import Element
 from pyplayready.system.pssh import PSSH as PR_PSSH
@@ -34,11 +35,13 @@ class ISM:
         self.url = url
 
     @classmethod
-    def from_url(cls, url: str, session: Optional[Session] = None, **kwargs: Any) -> "ISM":
+    def from_url(cls, url: str, session: Optional[Union[Session, CurlSession]] = None, **kwargs: Any) -> "ISM":
         if not url:
             raise requests.URLRequired("ISM manifest URL must be provided")
         if not session:
             session = Session()
+        elif not isinstance(session, (Session, CurlSession)):
+            raise TypeError(f"Expected session to be a {Session} or {CurlSession}, not {session!r}")
         res = session.get(url, **kwargs)
         if res.url != url:
             url = res.url

unshackle/core/manifests/m3u8.py

@@ -2,9 +2,10 @@
 
 from __future__ import annotations
 
-from typing import Optional
+from typing import Optional, Union
 
 import m3u8
+from curl_cffi.requests import Session as CurlSession
 from requests import Session
 
 from unshackle.core.manifests.hls import HLS
@@ -15,7 +16,7 @@ def parse(
     master: m3u8.M3U8,
     language: str,
     *,
-    session: Optional[Session] = None,
+    session: Optional[Union[Session, CurlSession]] = None,
 ) -> Tracks:
     """Parse a variant playlist to ``Tracks`` with basic information, defer DRM loading."""
     tracks = HLS(master, session=session).to_tracks(language)

unshackle/core/session.py

@@ -0,0 +1,79 @@
+"""Session utilities for creating HTTP sessions with different backends."""
+
+from __future__ import annotations
+
+import warnings
+
+from curl_cffi.requests import Session as CurlSession
+
+from unshackle.core.config import config
+
+# Globally suppress curl_cffi HTTPS proxy warnings since some proxy providers
+# (like NordVPN) require HTTPS URLs but curl_cffi expects HTTP format
+warnings.filterwarnings(
+    "ignore", message="Make sure you are using https over https proxy.*", category=RuntimeWarning, module="curl_cffi.*"
+)
+
+
+class Session(CurlSession):
+    """curl_cffi Session with warning suppression."""
+
+    def request(self, method, url, **kwargs):
+        with warnings.catch_warnings():
+            warnings.filterwarnings(
+                "ignore", message="Make sure you are using https over https proxy.*", category=RuntimeWarning
+            )
+            return super().request(method, url, **kwargs)
+
+
+def session(browser: str | None = None, **kwargs) -> Session:
+    """
+    Create a curl_cffi session that impersonates a browser.
+
+    This is a full replacement for requests.Session with browser impersonation
+    and anti-bot capabilities. The session uses curl-impersonate under the hood
+    to mimic real browser behavior.
+
+    Args:
+        browser: Browser to impersonate (e.g. "chrome124", "firefox", "safari").
+                 Uses the configured default from curl_impersonate.browser if not specified.
+                 See https://github.com/lexiforest/curl_cffi#sessions for available options.
+        **kwargs: Additional arguments passed to CurlSession constructor:
+                  - headers: Additional headers (dict)
+                  - cookies: Cookie jar or dict
+                  - auth: HTTP basic auth tuple (username, password)
+                  - proxies: Proxy configuration dict
+                  - verify: SSL certificate verification (bool, default True)
+                  - timeout: Request timeout in seconds (float or tuple)
+                  - allow_redirects: Follow redirects (bool, default True)
+                  - max_redirects: Maximum redirect count (int)
+                  - cert: Client certificate (str or tuple)
+
+    Returns:
+        curl_cffi.requests.Session configured with browser impersonation, common headers,
+        and equivalent retry behavior to requests.Session.
+
+    Example:
+        from unshackle.core.session import session
+
+        class MyService(Service):
+            @staticmethod
+            def get_session():
+                return session()  # Uses config default browser
+    """
+    if browser is None:
+        browser = config.curl_impersonate.get("browser", "chrome124")
+
+    session_config = {
+        "impersonate": browser,
+        "timeout": 30.0,
+        "allow_redirects": True,
+        "max_redirects": 15,
+        "verify": True,
+    }
+
+    session_config.update(kwargs)
+    session_obj = Session(**session_config)
+    session_obj.headers.update(config.headers)
+
+    return session_obj

unshackle/core/tracks/track.py

@@ -13,6 +13,7 @@ from typing import Any, Callable, Iterable, Optional, Union
 from uuid import UUID
 from zlib import crc32
 
+from curl_cffi.requests import Session as CurlSession
 from langcodes import Language
 from pyplayready.cdm import Cdm as PlayReadyCdm
 from pywidevine.cdm import Cdm as WidevineCdm
@@ -585,8 +586,8 @@ class Track:
             raise TypeError(f"Expected url to be a {str}, not {type(url)}")
         if not isinstance(byte_range, (str, type(None))):
             raise TypeError(f"Expected byte_range to be a {str}, not {type(byte_range)}")
-        if not isinstance(session, (Session, type(None))):
+        if not isinstance(session, (Session, CurlSession, type(None))):
-            raise TypeError(f"Expected session to be a {Session}, not {type(session)}")
+            raise TypeError(f"Expected session to be a {Session} or {CurlSession}, not {type(session)}")
 
         if not url:
             if self.descriptor != self.Descriptor.URL:

unshackle/core/tracks/tracks.py

@@ -181,7 +181,7 @@ class Tracks:
         log = logging.getLogger("Tracks")
 
         if duplicates:
-            log.warning(f" - Found and skipped {duplicates} duplicate tracks...")
+            log.debug(f" - Found and skipped {duplicates} duplicate tracks...")
 
     def sort_videos(self, by_language: Optional[Sequence[Union[str, Language]]] = None) -> None:
         """Sort video tracks by bitrate, and optionally language."""