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More => Old Versions => JRiver Media Center 25 for Windows => Topic started by: andrewberg on June 01, 2020, 07:43:51 pm

Title: What are "Mp3float" audio tracks?
Post by: andrewberg on June 01, 2020, 07:43:51 pm
I have some videos for which MC 25 identifies "Mp3float" as audio track codec... What kind of format is that, and how is it different to MP3? I only found one older posting on the keyword in the forum, and no useful information on the web at all...

Interestingly, MC 25 does distinguish between 'Mp3' and 'Mp3float'...

The problem is, videos using this audio codec often fail to play on my TV via DLNA... Only after converting these tracks to AC3 do they play properly...

Thanks in advance!
Title: Re: What are "Mp3float" audio tracks?
Post by: Hendrik on June 02, 2020, 03:45:56 am
This is not a different format, its normal mp3, just an indication of the decoder MC is using.
Title: Re: What are "Mp3float" audio tracks?
Post by: andrewberg on June 02, 2020, 03:41:53 pm
Sorry, I should have specified, 'mp3float' is what MC displays under 'Audio:...' in the Compression field (for video files only), but without the file playing, so no decoding in progress...

I would think that MC is simply reading these data from off the files' headers... However, when I analyzed some 'Mp3 / float' files in another program ('MediaInfo' by MediaArea.net), all have identical audio information as follows:

"Format: MPEG Audio, Version: 1, Profile: Layer 3, Codec-ID: 55, Codec-Info: MP3"

Note: Although 'Version' and 'Codec-ID' sometimes say '2' (not '55' or '1' as normally), this has no (!) impact on what MC displays for audio compression, so either can be 'Mp3' or 'mp3float'...

So I keep wondering, what is the difference, and why would some fail to play via DLNA?
Title: Re: What are "Mp3float" audio tracks?
Post by: Hendrik on June 02, 2020, 05:42:04 pm
My previous answer remains unchanged. There is no difference. Its just a detail how mp3 in video is being handled by MC.
Title: Re: What are "Mp3float" audio tracks?
Post by: andrewberg on June 02, 2020, 05:55:39 pm
My previous answer remains unchanged. There is no difference. Its just a detail how mp3 in video is being handled by MC.

I see, thanks. Not very helpful though in cases where videos are played on other devices (who do the rendering)...

It would also be interesting how MC decides which audio compression type to display (mp3 w/o float) when all files have what seem like standard MP3 tracks...