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DVR - UK Channel 4 HD | Channel 4+1 HD | audio problems recorded files

Added by Marc Ominus almost 6 years ago

I have problems playing recorded files from Channel 4 HD / Channel 4+1 HD
Channel 4 SD recordings play fine with music and audio

Movie sound is working, but audio in sense conversations between people is not, but as soon as the adds are on,
all works as it should.

When I play the file in VLC (Channel 4 HD/4+1 HD), I can see when moving forward where the ADDS are (grey markers) which is quite unusual, never seen this before ..

ITV HD works fine, but when playing in VLC there are no markers when moving playback to see where the adds are ...

mediainfo of recorded file:
General
Unique ID : 62265975018518161388086700545522611645 (0x2ED7FD96AE655F17E288C6EA5DE535BD)
Complete name : Predator-Channel-4-HD2018-12-1500-05.mkv
Format : Matroska
Format version : Version 2
File size : 4.96 GiB
Duration : 1 h 55 min
Overall bit rate : 6 176 kb/s
Movie name : Predator
ContentType : Movie / Drama
Writing application : Tvheadend 4.2.7-36~ga1a94dce3
Writing library : Tvheadend Matroska muxer
Original source form : TV
DATE_BROADCASTED : 2018-12-15 00:05:00
SUMMARY : (1987) Cult sci-fi action. Arnold Schwarzenegger plays the leader of a commando unit hunted in the South American jungle by a creature from another planet. Strong language/violent scenes. [S]
TVCHANNEL : Channel 4 HD

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 1 h 55 min
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Language : English
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : A_AAC-2
Duration : 1 h 55 min
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Delay relative to video : -1 s 1 ms
Language : English
Default : Yes
Forced : No

Text
ID : 3
Format : DVB Subtitle
Codec ID : S_DVBSUB
Codec ID/Info : Picture based subtitle format used on DVBs
Language : English
Default : Yes
Forced : No

I am running latest version HTS Tvheadend 4.2.7-36~ga1a94dce3 on Debian Stretch 64bit


Replies (5)

RE: DVR - UK Channel 4 HD | Channel 4+1 HD | audio problems recorded files - Added by Em Smith almost 6 years ago

Try using "ts" ("pass" in config->stream->profiles) instead of "matroska".

I've had problems in the past with audio in mkv (I don't know if they are fixed or not), but some of the channels have multiple audio streams such as "audio described", so it might be that the channel has an audio described English audio, but the programme does not have the audio for the programme, but some adverts do have audio description hence you hear audio in the adverts.

RE: DVR - UK Channel 4 HD | Channel 4+1 HD | audio problems recorded files - Added by Marc Ominus almost 6 years ago

Em Smith wrote:

Try using "ts" ("pass" in config->stream->profiles) instead of "matroska".

I've had problems in the past with audio in mkv (I don't know if they are fixed or not), but some of the channels have multiple audio streams such as "audio described", so it might be that the channel has an audio described English audio, but the programme does not have the audio for the programme, but some adverts do have audio description hence you hear audio in the adverts.

It's only problem on recorded files from UK Channel 4 HD | Channel 4+1 HD :(
Streaming works fine ...

RE: DVR - UK Channel 4 HD | Channel 4+1 HD | audio problems recorded files - Added by Em Smith almost 6 years ago

Sorry, I meant the option in config->recording->dvr profile the "stream profile" is probably set to "matroska" so set that to "pass".

RE: DVR - UK Channel 4 HD | Channel 4+1 HD | audio problems recorded files - Added by Hiro Protagonist almost 6 years ago

Em Smith wrote:

Try using "ts" ("pass" in config->stream->profiles) instead of "matroska".

I've been using 'pass' to record Channel 4, and I still sometimes get recordings with no audio.

RE: DVR - UK Channel 4 HD | Channel 4+1 HD | audio problems recorded files - Added by Marc Ominus almost 6 years ago

I think I have solved it:

Configuration - Recording - Digital Video Recorder Profiles:
Default profile: View level: Expert -> Recording file options -> Skip commercials UNTICK ....... !!!!

I now do not have "adds" segments showing on timeline when playing in VLC, but have sound :) in pass, I will try with MKV later ..

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