Jump to content

no sound


mad_cow

Recommended Posts

vdatanet

What is the audio bitrate?

 

Stream #0:1: Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s (default)

Link to comment
Share on other sites

Guest asrequested

Reading this again, it appears as though downmixing is isn't being done correctly. What audio options does your TV have?

 

Does it have an option to process the sound to a pseudo surround sound? What is your TV doing with your audio?

Edited by Doofus
Link to comment
Share on other sites

mad_cow

Um, actually I have no idea what audio options my TV has.

 

But I found another AC3 media file in my library, which plays fine

TitleEnglish Dolby Digital 5.1
TaalEnglish
CodecAC3
Opmaak5.1
Kanalen6 ch
Bitrate640 kbps
Samplesnelheid48.000 Hz
StandaardNo
 
and the file where I get an issue with the audio stream
TitleDolby Digital 5.1 (Default)
CodecAC3
Opmaak5.1
Kanalen6 ch
Bitrate384 kbps
Samplesnelheid48.000 Hz
StandaardYes

 

I attached the server log when I played the other AC3 file which works fine

embyserver_otherAC3file.txt

Link to comment
Share on other sites

mad_cow

My TV's sound setting are:

 

Dual Sound: Stereo

Speakers: TV Speakers

 

Sound Mode: [standard]: Optimises sound quality for general content. 

Sound Booster On

Advanced Auto Volume Off

 

I dont see any setting that appears to be upmixing the surround sound

Link to comment
Share on other sites

Guest asrequested

Well, if other similar audio plays correctly, I'm wondering if the channel arrangement it wrong. I have an anime like that. The voice is on the front right channel etc. I keep meaning to fix it, but I forget about it. Can you share the file?

Link to comment
Share on other sites

vdatanet

The strange thing is when transcoding is downmixed fine, so channel arrangement should be ok. We definitely need a sample to take a look.

Link to comment
Share on other sites

Guest asrequested

The strange thing is when transcoding is downmixed fine, so channel arrangement should be ok. We definitely need a sample to take a look.

Yeah, it's a weird one. But if the channels are wrong, depending on how it's downmixed, it could omit some channels and give the output he's describing. He has sound, but it's the wrong sound.

Link to comment
Share on other sites

  • 2 weeks later...
Guest asrequested

I think I see the problem. The file header is saying that the audio is only 2 channel AC3, but ffprobe is reading the actual media correctly as 6 channels. There might be a simple fix..... 

Link to comment
Share on other sites

Guest asrequested

Yeah, that's the problem. If I leave the audio set to auto, it plays correctly. But If i set it downmix to stereo, you only get the extraneous audio. 

Edited by Doofus
Link to comment
Share on other sites

Guest asrequested

Someone with good knowledge of ffmpeg could probably give you a command line that would decode and re-encode it. I can do that in mpv, on playback.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...