Opened 11 years ago

Closed 11 years ago

#6673 closed defect (fixed)

Mythtv current trunk couldn't play sound of french HD dvb-t

Reported by: eltorio@… Owned by: Janne Grunau
Priority: minor Milestone: 0.22
Component: MythTV - DVB/ATSC Version: head
Severity: medium Keywords:
Cc: Ticket locked: no


There is no playable sound this is a sample from TF1-HD... Video is played correctly in VDPAU or in ffmpeg mode.


Change History (7)

comment:1 Changed 11 years ago by gronan_roro@…

Same for me in north of France in all 3 1080i/1080p h264 channels (TF1 HD, France2 HD and M6 HD). For example on TF1-HD mythtv frontend see 2 audio tracks one is AC3 2 channels, and the other is "reserved for futur use") for this 2 tracks the sound is like you plug a speaker in a digital output.

comment:2 Changed 11 years ago by ookaze@…

For a temporary solution, eventuelly look here :

Basically, since 1st of june 2009, the HD multiplex for TF1, FR2 and M6 send E-AC3, with extensions not supported in the current FFMPEG and as such, also unsupported in the current MythTV's FFMPEG. The FFMPEG patch surely won't be accepted for now. But at least it works for me, so I've made a temporary patch for FFMPEG (SVN from 20090620) and also one for MythTV SVN 20710, which is the one I use for now. And it works until now. Like I said in this thread in MythTV-FR, this is a temporary solution, as it comes with some problems. For example, I was forced to remove both AC3 and DTS passthrough as my receiver doesn't understand E-AC3, and it seems like when these options are activated, MythTV passes E-AC3 directly to the receiver. So I have decoded sound now. The patches is there :

Also, these new channels include two sound streams most of the time, and I don't remember if we can select which one to choose by channel in MythTV, but it causes problems, as sometimes, we have one MPEG2 2 ch and one AC3 0 ch (meaning no sound at all), and unfortunately MythTV always chooses the AC3 0 ch one, which means no sound unless manually selected everytime.

comment:3 Changed 11 years ago by danielk

Milestone: unknown0.22
Owner: changed from danielk to janneg
Status: newassigned
Version: unknownhead

Reassigning to janneg since he's doing the ffmpeg merge.

comment:4 Changed 11 years ago by anonymous

ookaze patch wich is adapted from jbr work from ffmpeg is working perfectly for the french HD dvb-t channels

comment:5 Changed 11 years ago by Janne Grunau

Owner: changed from janneg to Janne Grunau

comment:6 Changed 11 years ago by Janne Grunau

(In [21465]) applies a couple of ffmpeg changes for eac3 spectral extension support. Refs #4862, Refs #6673

the applied changes are ffmpeg revision 19496, 19497, 19498, 19500, 19501, 19577, 19584-19589

comment:7 Changed 11 years ago by Janne Grunau

Resolution: fixed
Status: assignedclosed

(In [21466]) apply patch for EAC3 spectral extension support. Refs #4862, Closes #6673

requires configure rerun

patch on ffmpeg devel ml: Subject: Re: [FFmpeg-devel] [PATCH] E-AC-3 spectral extension From: Justin Ruggles <redacted> Date: Wed, 05 Aug 2009 18:14:39 -0400

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