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Converting 6 channel audio to 2 channel stereo- Help needed
drashkum
post Sep 6 2013, 06:33
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Hi guys,
This is my first post i this forum.
I have recently got a LG 3D smart Wifi TV for my home. I have many 3D HSBS blue ray rip movies in my hard disk which i would like to play in my tv( MKV, AVI, MP4 format). The TV supports all format and i am able to plug and play all movies from hard disk. But only problem is the audio. The audio for the HD movies which are 2 channel are perfect and i am able to hear the dialogues perfectly. But in those Bluray rips where the audio is 5.1 DTS/Dolby ( 6 channel) the dialogues are barely audible but the background music are perfect, which is spoiling the whole movie experience. I have tried changing the setting in TV but no improvement at all. Everytime i play the movie, the music background score is loud and dialogue is not properly audible.

I tried converting the movies to 2 channel in format factory and play but that also gives the same result of center channel audio of dialogues being suppressed.

Is there anyway i can re-encode this audio 5.1 and downmix it to 2 channel stereo without dialogues getting suppressed retaining the same video quality of Blueray rip and then play it on my TV.? are there any other softwares for it? can someone help me in detailing on how to do it or give me a pointer to any other tutorial sites on how to do it?. Sorry i am a noob in A/V kindly help me

Thanks
Drashkum

PS: I dont know if this is the right subforum to post this question. Moderators kindly move the topic to appropriate forum if it is wrong and oblige

This post has been edited by drashkum: Sep 6 2013, 06:40
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Brazil2
post Sep 7 2013, 10:49
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Give eac3to a try and especially its -downStereo option which is what you're looking for.
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CoRoNe
post Sep 7 2013, 22:28
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QUOTE (drashkum @ Sep 6 2013, 07:33) *
Is there anyway i can re-encode this audio 5.1 and downmix it to 2 channel stereo without dialogues getting suppressed retaining the same video quality of Blueray rip?
Let's assume you have a mkv-file with a H.264 video-stream, 2 DTS audiotracks and it's the 2nd DTS audiotrack you want to downmix to a, let's say, stereo AC3 audio-stream.

You could use eac3to...
CODE
eac3to.exe "movie.mkv" 3: "soundtrack.ac3" -downDpl -192
...to create a 192kbps Dolby Pro Logic II AC3-file, which you will have to mux manually afterwards.

You could also use FFmpeg...
CODE
ffmpeg.exe -i "movie.mkv" -map 0:0 -map 0:2 -c:v copy -c:a ac3 -ab 192k -ac 2 -af "aresample=matrix_encoding=dplii" "movie(downmix).mkv"
...to do it all at once; downmix (DPLII), encode to 192kbps AC3, mux video and the newly created AC3-stream (without the 1st DTS audio-stream) in a mkv-container.


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