No audio

tms87 · 2025-03-02, 03:27 PM

Hello,
I recently added German channels using this M3U playlist: m3u playlist
I’ve mainly been focusing on these two channels:

https://daserste-live.ard-mcdn.de/dasers...aster.m3u8
http://zdf-hls-15.akamaized.net/hls/live...aster.m3u8

I imported the M3U links as a playlist, and when starting one of these channels, I get video but no audio. There is no audio stream available to select, as shown in the attached screenshot.

When running these links with VLC or ffplay, the sound works fine. I have already tried using AC3Filter and LAV Decoder as audio decoders, but I didn’t see any improvement.
Attached are the logs.

Can anyone suggest how to resolve the audio issue?

Thank you,
Thomas

mvallevand · (This post was last modified: 2025-03-02, 04:06 PM by mvallevand.)

Does it play in the browser? My gut says the m3u8 files have split audio and video and can't be direct played.

maybe show us the output from

curl -L https://daserste-live.ard-mcdn.de/dasers...aster.m3u8
curl -L http://zdf-hls-15.akamaized.net/hls/live...aster.m3u8

Also you didn't show a test with LAV 32 bit (not 64) Once there is video it probably will be AAC.

Martin

tms87 · 2025-03-02, 03:51 PM

(2025-03-02, 03:39 PM)mvallevand Wrote: Does it play in the browser? My gut says the m3u8 files have split audio and video and can't be direct played.

maybe show us the output from

curl -L https://daserste-live.ard-mcdn.de/dasers...aster.m3u8
curl -L http://zdf-hls-15.akamaized.net/hls/live...aster.m3u8

Also you didn't show a test with LAV 32 bit (not 64) Once there is video it probably will be AAC.

Martin

Curl outputs:

Code:
#EXTM3U
#EXT-X-VERSION:4
#EXT-X-INDEPENDENT-SEGMENTS
#EXT-X-STREAM-INF:BANDWIDTH=2147200,AVERAGE-BANDWIDTH=1460800,VIDEO-RANGE=SDR,CODECS="avc1.4d401f,mp4a.40.2",RESOLUTION=640x360,FRAME-RATE=50.000,AUDIO="program_audio",SUBTITLES="subs",HDCP-LEVEL=NONE
master360p1200.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=8500800,AVERAGE-BANDWIDTH=5640800,VIDEO-RANGE=SDR,CODECS="avc1.64002a,mp4a.40.2",RESOLUTION=1920x1080,FRAME-RATE=50.000,AUDIO="program_audio",SUBTITLES="subs",HDCP-LEVEL=NONE
master1080p5000.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=5491200,AVERAGE-BANDWIDTH=3660800,VIDEO-RANGE=SDR,CODECS="avc1.640020,mp4a.40.2",RESOLUTION=1280x720,FRAME-RATE=50.000,AUDIO="program_audio",SUBTITLES="subs",HDCP-LEVEL=NONE
master720p3200.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=2816000,AVERAGE-BANDWIDTH=1900800,VIDEO-RANGE=SDR,CODECS="avc1.4d401f,mp4a.40.2",RESOLUTION=960x540,FRAME-RATE=50.000,AUDIO="program_audio",SUBTITLES="subs",HDCP-LEVEL=NONE
master540p1600.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1311200,AVERAGE-BANDWIDTH=910800,VIDEO-RANGE=SDR,CODECS="avc1.4d401e,mp4a.40.2",RESOLUTION=480x270,FRAME-RATE=50.000,AUDIO="program_audio",SUBTITLES="subs",HDCP-LEVEL=NONE
master270p700.m3u8
#EXT-X-MEDIA:TYPE=AUDIO,LANGUAGE="de",NAME="Deutsch",AUTOSELECT=YES,DEFAULT=YES,CHANNELS="2",GROUP-ID="program_audio",URI="masteraudio1.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,LANGUAGE="de",NAME="Klare Sprache",AUTOSELECT=YES,DEFAULT=NO,CHANNELS="2",GROUP-ID="program_audio",URI="masteraudio2.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,LANGUAGE="de",NAME="Audiodeskription",CHARACTERISTICS="public.accessibility.describes-video",AUTOSELECT=YES,DEFAULT=NO,CHANNELS="2",GROUP-ID="program_audio",URI="masteraudio3.m3u8"
#EXT-X-MEDIA:TYPE=SUBTITLES,NAME="Deutsch",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE="de",GROUP-ID="subs",URI="mastersubs.m3u8"

and

Code:
#EXTM3U

#EXT-X-INDEPENDENT-SEGMENTS

#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A1.1+A2.1+A3.1-510682780",NAME="TV Ton",LANGUAGE="deu",DEFAULT=YES,URI="https://zdf-hls-15.akamaized.net/hls/live/2016498/de/23ce7d09760ca6fef4b6d59aee85b3c1/5/5.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A1.1+A2.1+A3.1-510682780",NAME="Klare Sprache / Originalton",LANGUAGE="mul",URI="https://zdf-hls-15.akamaized.net/hls/live/2016498/de/23ce7d09760ca6fef4b6d59aee85b3c1/6/6.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A1.1+A2.1+A3.1-510682780",NAME="Audio-Deskription",LANGUAGE="deu",URI="https://zdf-hls-15.akamaized.net/hls/live/2016498/de/23ce7d09760ca6fef4b6d59aee85b3c1/7/7.m3u8"

#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A1.1+A2.1+A3.1-1266820252",NAME="TV Ton",LANGUAGE="deu",DEFAULT=YES,URI="https://zdf-hls-15.akamaized.net/hls/live/2016498-b/de/23ce7d09760ca6fef4b6d59aee85b3c1/5/5.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A1.1+A2.1+A3.1-1266820252",NAME="Klare Sprache / Originalton",LANGUAGE="mul",URI="https://zdf-hls-15.akamaized.net/hls/live/2016498-b/de/23ce7d09760ca6fef4b6d59aee85b3c1/6/6.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="A1.1+A2.1+A3.1-1266820252",NAME="Audio-Deskription",LANGUAGE="deu",URI="https://zdf-hls-15.akamaized.net/hls/live/2016498-b/de/23ce7d09760ca6fef4b6d59aee85b3c1/7/7.m3u8"

#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="T1-510682780",NAME="Untertitel deutsch",CODECS="wvtt",LANGUAGE="deu",DEFAULT=YES,AUTOSELECT=YES,URI="https://zdf-hls-15.akamaized.net/hls/live/2016498/de/23ce7d09760ca6fef4b6d59aee85b3c1/8/8.m3u8"

#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="T1-1266820252",NAME="Untertitel deutsch",CODECS="wvtt",LANGUAGE="deu",DEFAULT=YES,AUTOSELECT=YES,URI="https://zdf-hls-15.akamaized.net/hls/live/2016498-b/de/23ce7d09760ca6fef4b6d59aee85b3c1/8/8.m3u8"

#EXT-X-STREAM-INF:CODECS="avc1.4d401f,mp4a.40.2",BANDWIDTH=671111,AVERAGE-BANDWIDTH=581111,AUDIO="A1.1+A2.1+A3.1-510682780",SUBTITLES="T1-510682780",FRAME-RATE=25.000,RESOLUTION=480x270
https://zdf-hls-15.akamaized.net/hls/live/2016498/de/23ce7d09760ca6fef4b6d59aee85b3c1/1/1.m3u8
#EXT-X-STREAM-INF:CODECS="avc1.4d401f,mp4a.40.2",BANDWIDTH=671111,AVERAGE-BANDWIDTH=581111,AUDIO="A1.1+A2.1+A3.1-1266820252",SUBTITLES="T1-1266820252",FRAME-RATE=25.000,RESOLUTION=480x270
https://zdf-hls-15.akamaized.net/hls/live/2016498-b/de/23ce7d09760ca6fef4b6d59aee85b3c1/1/1.m3u8
#EXT-X-STREAM-INF:CODECS="avc1.4d401f,mp4a.40.2",BANDWIDTH=1173371,AVERAGE-BANDWIDTH=969371,AUDIO="A1.1+A2.1+A3.1-510682780",SUBTITLES="T1-510682780",FRAME-RATE=25.000,RESOLUTION=640x360
https://zdf-hls-15.akamaized.net/hls/live/2016498/de/23ce7d09760ca6fef4b6d59aee85b3c1/2/2.m3u8
#EXT-X-STREAM-INF:CODECS="avc1.4d401f,mp4a.40.2",BANDWIDTH=1173371,AVERAGE-BANDWIDTH=969371,AUDIO="A1.1+A2.1+A3.1-1266820252",SUBTITLES="T1-1266820252",FRAME-RATE=25.000,RESOLUTION=640x360
https://zdf-hls-15.akamaized.net/hls/live/2016498-b/de/23ce7d09760ca6fef4b6d59aee85b3c1/2/2.m3u8
#EXT-X-STREAM-INF:CODECS="avc1.4d401f,mp4a.40.2",BANDWIDTH=2257198,AVERAGE-BANDWIDTH=1807198,AUDIO="A1.1+A2.1+A3.1-510682780",SUBTITLES="T1-510682780",FRAME-RATE=25.000,RESOLUTION=960x540
https://zdf-hls-15.akamaized.net/hls/live/2016498/de/23ce7d09760ca6fef4b6d59aee85b3c1/3/3.m3u8
#EXT-X-STREAM-INF:CODECS="avc1.4d401f,mp4a.40.2",BANDWIDTH=2257198,AVERAGE-BANDWIDTH=1807198,AUDIO="A1.1+A2.1+A3.1-1266820252",SUBTITLES="T1-1266820252",FRAME-RATE=25.000,RESOLUTION=960x540
https://zdf-hls-15.akamaized.net/hls/live/2016498-b/de/23ce7d09760ca6fef4b6d59aee85b3c1/3/3.m3u8
#EXT-X-STREAM-INF:CODECS="avc1.640028,mp4a.40.2",BANDWIDTH=4504154,AVERAGE-BANDWIDTH=3544154,AUDIO="A1.1+A2.1+A3.1-510682780",SUBTITLES="T1-510682780",FRAME-RATE=50.000,RESOLUTION=1280x720
https://zdf-hls-15.akamaized.net/hls/live/2016498/de/23ce7d09760ca6fef4b6d59aee85b3c1/4/4.m3u8
#EXT-X-STREAM-INF:CODECS="avc1.640028,mp4a.40.2",BANDWIDTH=4504154,AVERAGE-BANDWIDTH=3544154,AUDIO="A1.1+A2.1+A3.1-1266820252",SUBTITLES="T1-1266820252",FRAME-RATE=50.000,RESOLUTION=1280x720
https://zdf-hls-15.akamaized.net/hls/live/2016498-b/de/23ce7d09760ca6fef4b6d59aee85b3c1/4/4.m3u8

Attached there is also a log using LAV decoder (32 bit).

mvallevand · 2025-03-02, 03:58 PM

Unless the m3u8 downloader has changed those should be being passed to ffmpeg Did you try with the browser?

Martin

tms87 · 2025-03-02, 04:09 PM

(2025-03-02, 03:58 PM)mvallevand Wrote: Unless the m3u8 downloader has changed those should be being passed to ffmpeg Did you try with the browser?

Martin

Yes, i tried it in the browser, but it doesn't work. There isn't even video. I receive this error:

Streaming Failed (transcoder exited)

mvallevand · 2025-03-02, 04:16 PM

That means that it is direct play too, the browser doesn't work with video only streams.

I think that maybe NextPVR thinks application/vnd.apple.mpegurl can be direct played.

You probably need an extra. Here is an example you can likely follow https://forums.nextpvr.com/showthread.ph...#pid598682

Martin

tms87 · 2025-03-02, 06:53 PM

(2025-03-02, 04:16 PM)mvallevand Wrote: That means that it is direct play too, the browser doesn't work with video only streams.

I think that maybe NextPVR thinks application/vnd.apple.mpegurl can be direct played.

You probably need an extra. Here is an example you can likely follow https://forums.nextpvr.com/showthread.ph...#pid598682

Martin

I tried extra and it works Smile

Possibly Related Threads…
Thread		Author	Replies	Views	Last Post
	Desktop Client lost it's audio	Rich A	6	420	2026-08-23, 03:37 AM Last Post: sub
	Robotic audio in Chromium browsers (Firefox, Kodi and Android work correctly)	digitaltuner	33	1,965	2026-08-07, 01:55 PM Last Post: mvallevand
	Will new release fix my audio synch issues?	Ricknextpvr	102	6,807	2026-07-28, 12:50 AM Last Post: mvallevand
	Help. IPTV audio. 1ch works. 1ch doesn't. w/examples+logs	snard	11	2,881	2026-02-16, 05:48 PM Last Post: mvallevand
	Audio and video not synchronized?	Berger	1	529	2026-02-02, 10:53 AM Last Post: Bobins
	AUDIO PROBLEM - Web app	JohnMark	2	771	2025-12-09, 09:44 AM Last Post: JohnMark
	Audio out of synch with nextPVR.exe	Higgo	33	7,696	2025-08-24, 11:02 PM Last Post: Ricknextpvr
	Audio garbled	antarmbreacdearg	7	2,075	2025-07-13, 10:00 PM Last Post: mvallevand
	No Audio Stream on most IPTV Channels	pascholnahui	15	5,332	2025-05-24, 09:35 PM Last Post: mvallevand
	Synchronization of video and audio still an issue	Ricknextpvr	21	5,541	2025-03-08, 04:36 PM Last Post: mvallevand