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ittiam-systems / libmpegh

MPEG-H 3D Audio Low Complexity Profile Decoder. Encoder: https://github.com/ittiam-systems/libmpeghe
http://www.ittiam.com/
BSD 3-Clause Clear License
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Extracting Object only #26

Closed TimsVolcanion closed 1 year ago

TimsVolcanion commented 1 year ago

I'm currently testing out the decoder and I can't get it to extract the objects, I've checked the documents provided, it didn't give me any information.

SakethSathuvalli commented 1 year ago

Hi,

Please refer to the entries in tables 3-1 and 3-2 of the API document. These tables have details about the buffers that carry the object audio information when external rendering is enabled. The interfaces are provided as per the specification for MPEG-H and expects the user of this data to have prior knowledge of programming and digital audio formats(PCM data of multichannel).

Thanks!

m41c0n commented 1 year ago

Hi,

Please refer to the entries in tables 3-1 and 3-2 of the API document. These tables have details about the buffers that carry the object audio information when external rendering is enabled. The interfaces are provided as per the specification for MPEG-H and expects the user of this data to have prior knowledge of programming and digital audio formats(PCM data of multichannel).

Thanks!

Hello, I have a doubt: If a song is encoded with 22.2 channels, and I use your software to decode it with -cicp:19 (wishing for a 7.1.4 file), the conversion merges the channels to form the output, or it just erases the extra channels? Thank you!

SakethSathuvalli commented 1 year ago

Hi, Please refer to the entries in tables 3-1 and 3-2 of the API document. These tables have details about the buffers that carry the object audio information when external rendering is enabled. The interfaces are provided as per the specification for MPEG-H and expects the user of this data to have prior knowledge of programming and digital audio formats(PCM data of multichannel). Thanks!

Hello, I have a doubt: If a song is encoded with 22.2 channels, and I use your software to decode it with -cicp:19 (wishing for a 7.1.4 file), the conversion merges the channels to form the output, or it just erases the extra channels? Thank you!

Hi @m41c0n ,

The conversion merges the channels using an algorithm which takes into consideration the input and output channel formats. It does not erase the extra channels.

m41c0n commented 1 year ago

Hi @m41c0n ,

The conversion merges the channels using an algorithm which takes into consideration the input and output channel formats. It does not erase the extra channels.

Thank you so much for the answer! And by the way, thank you for this amazing project, it's so useful and works perfectly... Have a nice day.

SakethSathuvalli commented 1 year ago

Hi @m41c0n

We have recently added a wiki page on external rendering interfaces. Can You please check if it helps you with the issue you are facing?

Thanks!

SakethSathuvalli commented 1 year ago

Hi @TimsVolcanion,

I was wondering if you got a chance to try the -ext_ren: command line switch for extracting objects. Here's a wiki page that talks about this command line switch.

Thanks!

SakethSathuvalli commented 1 year ago

Hi @TimsVolcanion,

We will be closing this issue soon due to inactivity for long-time!