feat(hls): detect DV-composite tracks and restore signaling post-mux

Parse HLS SUPPLEMENTAL-CODECS to identify tracks that ship Dolby Vision RPU NALs in a stream whose primary codec is plain hvc1 (e.g. fMP4 ladders signalled as dvh1.08.x only via SUPPLEMENTAL-CODECS). Tag such tracks with the new `dv_compatible_bitstream` flag on Video.

Add DVFixup helper that runs `dovi_tool extract-rpu | inject-rpu` on flagged tracks before mux so the muxed MKV is recognised as Dolby Vision. Soft-fails to the source bitstream if dovi_tool is missing or any step errors.

Range stays whatever VIDEO-RANGE signalled. HDR10+ presence is a bitstream feature, not a codec-string feature, so services that know their encoder embeds HDR10+ SEI must override Video.range themselves.

unshackle/commands/dl.py

@@ -53,6 +53,7 @@ from unshackle.core.titles import Movie, Movies, Series, Song, Title_T
 from unshackle.core.titles.episode import Episode
 from unshackle.core.tracks import Audio, Subtitle, Tracks, Video
 from unshackle.core.tracks.attachment import Attachment
+from unshackle.core.tracks.dv_fixup import apply_dv_fixup
 from unshackle.core.tracks.hybrid import Hybrid
 from unshackle.core.utilities import (find_font_with_fallbacks, get_debug_logger, get_system_fonts, init_debug_logger,
                                       is_close_match, suggest_font_packages, time_elapsed_since)
@@ -2433,6 +2434,9 @@ class dl:
                     else:
                         # Normal mode: process each video track separately
                         for video_track in title.tracks.videos or [None]:
+                            if video_track and getattr(video_track, "dv_compatible_bitstream", False):
+                                apply_dv_fixup(video_track)
+
                             task_description = "Multiplexing"
                             if video_track:
                                 if len(quality) > 1:

unshackle/core/manifests/dash.py

@@ -853,6 +853,10 @@ class DASH:
     def get_video_range(
         codecs: str, all_supplemental_props: list[Element], all_essential_props: list[Element]
     ) -> Video.Range:
+        # TODO: Detect Dolby Vision composite streams in DASH manifests (DV RPU embedded but
+        # primary codec is plain hvc1, signaled via a separate AdaptationSet/Representation
+        # with DV codec strings or DolbyVisionConfigurationBox). When found, mark the track
+        # with dv_compatible_bitstream=True so DVFixup runs pre-mux. No DASH samples seen yet.
         if codecs.startswith(("dva1", "dvav", "dvhe", "dvh1")):
             return Video.Range.DV
 

unshackle/core/manifests/hls.py

@@ -5,6 +5,7 @@ import html
 import json
 import logging
 import os
+import re
 import shutil
 import subprocess
 import sys
@@ -36,8 +37,14 @@ from unshackle.core.utilities import get_debug_logger, get_extension, is_close_m
 
 
 class HLS:
+    SUPP_CODECS_RE = re.compile(r'SUPPLEMENTAL-CODECS="([^"]+)"', re.IGNORECASE)
+
     def __init__(
-        self, manifest: M3U8, session: Optional[Union[Session, RnetSession]] = None, url: Optional[str] = None
+        self,
+        manifest: M3U8,
+        session: Optional[Union[Session, RnetSession]] = None,
+        url: Optional[str] = None,
+        raw_text: Optional[str] = None,
     ):
         if not manifest:
             raise ValueError("HLS manifest must be provided.")
@@ -49,6 +56,7 @@ class HLS:
         self.manifest = manifest
         self.session = session or Session()
         self.url = url
+        self.raw_text = raw_text
 
     @classmethod
     def from_url(cls, url: str, session: Optional[Union[Session, RnetSession]] = None, **args: Any) -> HLS:
@@ -78,7 +86,7 @@ class HLS:
 
         master = m3u8.loads(content, uri=url)
 
-        return cls(master, session, url=url)
+        return cls(master, session, url=url, raw_text=content)
 
     @classmethod
     def from_text(cls, text: str, url: str) -> HLS:
@@ -94,7 +102,31 @@ class HLS:
 
         master = m3u8.loads(text, uri=url)
 
-        return cls(master)
+        return cls(master, raw_text=text)
+
+    def supplemental_codecs_by_uri(self) -> dict[str, str]:
+        """Map each variant URI to its SUPPLEMENTAL-CODECS value.
+
+        python-m3u8 drops this attribute, so we re-parse the raw text to recover it for
+        Dolby Vision composite detection (dvh1.08.x advertised only in SUPPLEMENTAL-CODECS
+        while primary CODECS stays plain hvc1).
+        """
+        if not self.raw_text:
+            return {}
+        out: dict[str, str] = {}
+        lines = self.raw_text.splitlines()
+        for i, line in enumerate(lines):
+            if not line.startswith("#EXT-X-STREAM-INF"):
+                continue
+            supp_match = self.SUPP_CODECS_RE.search(line)
+            if not supp_match:
+                continue
+            for j in range(i + 1, len(lines)):
+                uri = lines[j].strip()
+                if uri and not uri.startswith("#"):
+                    out[uri] = supp_match.group(1)
+                    break
+        return out
 
     def to_tracks(self, language: Union[str, Language]) -> Tracks:
         """
@@ -126,6 +158,9 @@ class HLS:
                 )
         tracks = Tracks()
 
+        supplemental_codecs = self.supplemental_codecs_by_uri()
+        dv_supp_prefixes = ("dva1", "dvav", "dvhe", "dvh1")
+
         for playlist in self.manifest.playlists:
             audio_group = playlist.stream_info.audio
             audio_codec: Optional[Audio.Codec] = None
@@ -146,6 +181,26 @@ class HLS:
             else:
                 primary_track_type = Video
 
+            primary_codecs = (playlist.stream_info.codecs or "").lower()
+            primary_has_dv = any(codec.split(".")[0] in dv_supp_prefixes for codec in primary_codecs.split(","))
+
+            supp_codecs_str = supplemental_codecs.get(playlist.uri, "")
+            supp_dv_codec: Optional[str] = None
+            for codec in supp_codecs_str.lower().split(","):
+                token = codec.strip().split("/")[0]
+                if token.split(".")[0] in dv_supp_prefixes:
+                    supp_dv_codec = token
+                    break
+
+            video_range = (
+                Video.Range.DV if primary_has_dv else Video.Range.from_m3u_range_tag(playlist.stream_info.video_range)
+            )
+            # DV-composite track: primary codec is plain HEVC but SUPPLEMENTAL-CODECS advertises
+            # a DV codec. Range stays whatever VIDEO-RANGE signaled (HDR10/HLG/SDR); DVFixup will
+            # restore DV signaling post-download. Services that know their encoder embeds HDR10+
+            # SEI must override `range` themselves (see services/ATV).
+            dv_compatible_bitstream = primary_track_type is Video and not primary_has_dv and supp_dv_codec is not None
+
             tracks.add(
                 primary_track_type(
                     id_=hex(crc32(str(playlist).encode()))[2:],
@@ -164,18 +219,14 @@ class HLS:
                     # video track args
                     **(
                         dict(
-                            range_=Video.Range.DV
-                            if any(
-                                codec.split(".")[0] in ("dva1", "dvav", "dvhe", "dvh1")
-                                for codec in (playlist.stream_info.codecs or "").lower().split(",")
-                            )
-                            else Video.Range.from_m3u_range_tag(playlist.stream_info.video_range),
+                            range_=video_range,
                             width=playlist.stream_info.resolution[0] if playlist.stream_info.resolution else None,
                             height=playlist.stream_info.resolution[1] if playlist.stream_info.resolution else None,
                             fps=playlist.stream_info.frame_rate,
                             closed_captions=cc_by_group_id.get(
                                 (playlist.stream_info.closed_captions or "").strip('"'), []
                             ),
+                            dv_compatible_bitstream=dv_compatible_bitstream,
                         )
                         if primary_track_type is Video
                         else {}

unshackle/core/tracks/dv_fixup.py

@@ -0,0 +1,117 @@
+"""
+DV fixup for HLS composite HEVC streams.
+
+Some services deliver DV Profile 8.1 in a stream whose primary CODECS is plain
+hvc1, with DV advertised only via SUPPLEMENTAL-CODECS. The fMP4 carries DV RPU NALs but
+the container does not signal DV, so muxing produces an MKV that mediainfo and DV-capable
+TVs see as plain HDR10/HDR10+.
+
+A dovi_tool extract-rpu / inject-rpu round-trip rewrites the bitstream so it is recognised
+as DV after muxing. HDR10+ SEI NALs and HDR10 base layer signaling survive untouched.
+"""
+
+from __future__ import annotations
+
+import logging
+from pathlib import Path
+from typing import TYPE_CHECKING
+
+from rich.padding import Padding
+from rich.rule import Rule
+
+from unshackle.core.binaries import FFMPEG, DoviTool
+from unshackle.core.config import config
+from unshackle.core.console import console
+from unshackle.core.utilities import get_debug_logger
+from unshackle.core.utils import dovi
+from unshackle.core.utils.subprocess import run_step
+
+if TYPE_CHECKING:
+    from unshackle.core.tracks import Video
+
+
+class DVFixup:
+    """Round-trip a DV-composite HEVC track through dovi_tool to restore DV signaling."""
+
+    def __init__(self, video: "Video") -> None:
+        self.log = logging.getLogger("dv-fixup")
+        self.debug_logger = get_debug_logger()
+        self.video = video
+
+        if not DoviTool:
+            raise EnvironmentError("dovi_tool is required for DV-composite fixup but was not found.")
+        if not FFMPEG:
+            raise EnvironmentError("ffmpeg is required for DV-composite fixup but was not found.")
+        if not video.path or not Path(video.path).exists():
+            raise ValueError(f"Video track {video.id} was not downloaded before DV fixup.")
+
+    def run(self) -> Path:
+        """Execute the fixup. Returns the DV-signaled HEVC path, or the original
+        source path on any failure so muxing can proceed with the as-downloaded file."""
+        source = Path(self.video.path)
+        height = self.video.height or 0
+        console.print(Padding(Rule(f"[rule.text]DV Composite Fixup ({height}p)"), (1, 2)))
+
+        fixed_hevc = source.with_name(f"{self.video.id}.dv.hevc")
+        if fixed_hevc.exists() and fixed_hevc.stat().st_size > 0:
+            self.log.info("✓ DV signaling already restored (reusing existing fixup)")
+            return fixed_hevc
+
+        tmp = config.directories.temp
+        tmp.mkdir(parents=True, exist_ok=True)
+        suffix = f"{self.video.id}_{height or 'na'}"
+        raw_hevc = tmp / f"dvfix_{suffix}.hevc"
+        rpu = tmp / f"dvfix_{suffix}_rpu.bin"
+
+        try:
+            run_step(
+                [FFMPEG, "-nostdin", "-y", "-i", source, "-c:v", "copy", "-f", "hevc", raw_hevc],
+                status="Demuxing HEVC bitstream...",
+                output=raw_hevc,
+                label="ffmpeg demux",
+            )
+            dovi.extract_rpu_with_fallback(raw_hevc, rpu)
+            dovi.inject_rpu(raw_hevc, rpu, fixed_hevc, status="Re-injecting DV RPU with proper signaling...")
+        except Exception as e:
+            self.log.warning(f"DV fixup failed ({e}); muxing source as-is.")
+            if self.debug_logger:
+                self.debug_logger.log(
+                    level="WARNING",
+                    operation="dv_fixup",
+                    message="DV fixup failed; falling back to source",
+                    context={"error": str(e), "source": str(source)},
+                )
+            for leftover in (raw_hevc, rpu, fixed_hevc):
+                leftover.unlink(missing_ok=True)
+            return source
+
+        for leftover in (raw_hevc, rpu):
+            leftover.unlink(missing_ok=True)
+
+        self.log.info("✓ DV signaling restored")
+        if self.debug_logger:
+            self.debug_logger.log(
+                level="INFO",
+                operation="dv_fixup",
+                message="DV fixup complete",
+                context={"source": str(source), "output": str(fixed_hevc)},
+                success=True,
+            )
+        return fixed_hevc
+
+
+def apply_dv_fixup(video: "Video") -> None:
+    """Run DV fixup on `video` if flagged as DV-composite. Updates `video.path` in place
+    and deletes the original source file so the standard mux cleanup handles the new path."""
+    if not getattr(video, "dv_compatible_bitstream", False):
+        return
+    if not video.path or not Path(video.path).exists():
+        return
+    original = Path(video.path)
+    fixed = DVFixup(video).run()
+    if fixed != original:
+        video.path = fixed
+        original.unlink(missing_ok=True)
+
+
+__all__ = ("DVFixup", "apply_dv_fixup")

unshackle/core/tracks/video.py

@@ -228,6 +228,7 @@ class Video(Track):
         fps: Optional[Union[str, int, float]] = None,
         scan_type: Optional[Video.ScanType] = None,
         closed_captions: Optional[list[dict[str, Any]]] = None,
+        dv_compatible_bitstream: bool = False,
         **kwargs: Any,
     ) -> None:
         """
@@ -294,6 +295,7 @@ class Video(Track):
         self.scan_type = scan_type
         self.closed_captions: list[dict[str, Any]] = closed_captions or []
         self.needs_duration_fix = False
+        self.dv_compatible_bitstream = dv_compatible_bitstream
 
     def __str__(self) -> str:
         return " | ".join(