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Dolby Vision Profile 7 is sent to a Profile 5 decoder on DV displays without a Profile 7 decoder

Aperta
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#3,486 0 commenti 0 reazioni 1 assegnatario Vedi su GitHub

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@microkatz ci sta già lavorando.

Dal 26/10/2026.

Valutazione

Difficoltà
4/5
Tempo stimato
1-2 giorni
Idoneità per principianti
48/100
Tipo di issue
Bug
Chiarezza
Abbastanza chiara
Stato di attività
Attiva
Stack tecnologico
android, java
Ambito
audio-video-rtc, backend

Direzione di ricerca

Start by tracing MediaCodecUtil.getAlternativeCodecMimeType and the Dolby Vision profile handling mentioned in the report; compare the profile 7 path with the existing profile 8 fallback. Reproduce in the demo app using an MKV with a Dolby Vision Profile 7 track (dvhe.07.06) on a device without a Profile 7 decoder. Done means playback selects an HEVC decoder for the HDR10-compatible base layer and displays correct HDR10 colours.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

Version

Media3 main branch (other)

More version details

main at 8c6678b ("Bump version to 1.11.1"). Also seen in Media3 1.10.1 and 1.11.1 as bundled by Stremio (1.10.1-stremio01, 1.11.1-stremio01).

Devices that reproduce the issue

TCL 43BP615 (Google TV, Android 12 / API 31, Realtek, device G10). The display supports Dolby Vision (HDR types 1, 2, 3). Its Dolby Vision decoders are OMX.realtek.video.dvhe.stn.decoder, OMX.realtek.video.dvhe.dtr.decoder, OMX.realtek.video.dvhe.st.decoder, OMX.realtek.video.dvav.se.decoder and OMX.realtek.video.dav1.10.decoder; none supports profile 7.

Devices that do not reproduce the issue

No response

Reproducible in the demo app?

Yes

Reproduction steps

Play an MKV with a Dolby Vision Profile 7 video track (UHD Blu-ray remux: dvhe.07.06, dv_bl_signal_compatibility_id=6, enhancement layer present) in the demo app.

Expected result

Playback of the HDR10-compatible base layer with an HEVC decoder, as Media3 already does for profile 8 when no Dolby Vision decoder supports it.

Actual result

No decoder supports dvhe.07.06, MediaCodecUtil.getAlternativeCodecMimeType returns null for DolbyVisionProfileDvheDtb, and Media3 picks the first Dolby Vision decoder anyway, the Profile 5 one:

D/MediaCodec: create +OMX.realtek.video.dvhe.stn.decoder
W/MediaCodecRenderer: Format exceeds selected codec's capabilities [id=1, mimeType=video/dolby-vision, container=video/x-matroska, codecs=dvhe.07.06, res=3840x2160, color=BT2020/Limited range/ST2084 PQ/10 ...]
I/DVO: +++ ... Dolby = 1 DolbyProfile = 83886080

The display then treats the HDR10 base layer as Profile 5 (with another remux it went to SDR instead: Dolby = 0, hdr=SDR), and the picture is grey and washed out. Every UHD Blu-ray remux with Dolby Vision is affected on this TV.

With #3160 applied to main (it applies cleanly with a three-way merge), the same file plays through the HEVC decoder in HDR10 with correct colours:

D/MediaCodec: create +OMX.realtek.video.decoder
I/OMX_VDEC: frame-info: 3840x2160/23976, hdr=1
D/DisplayManager: notify hdr type: ... type=1

This is broader than #3119 (closed without a bug report): it affects Dolby Vision displays too, wherever no decoder supports profile 7, which is most Android TV devices. If a general fallback is a concern, the base-layer compatibility id in the dvcC/dvvC record (6 for UHD Blu-ray) could limit it to streams whose base layer is HDR10.

Media

Commercial UHD Blu-ray content, which I can't share. Any UHD Blu-ray remux with Dolby Vision reproduces it; I tested a 30-second video-only cut (dvhe.07.06, full enhancement layer).

Bug Report
  • You will email the zip file produced by adb bugreport to [email protected] after filing this issue.

I can send an adb bugreport on request.

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Java
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