[mythtv-users] leanfront no audio on FireTV

[John Pilkington]

On 27/01/2020 16:41, Peter Bennett wrote:
> 
> 
> On 1/26/20 9:45 PM, OpenMedia Support wrote:
>>> I'm running a Third generation Fire TV Pendant Model with the android
>> and leanback MythTV Frontends.
>>> The Android frontend has working audio
>>> (mythfrontend-20190625-arm-v30.0-60-gb9c1b41a6c0.apk ) but the latest
>> leanback version has no audio (leanfront-v0-91-g72cfd86_d.apk).
>>> I've also tried the older leanfront-v0-86-g57612f1_d.apk which still
>> doesn't play audio.
>>> The files I'm playing are MPEG-2 TS Streams with MP2 audio.
>>>
>>> Anyone else seeing this issue with the leanback gui?
>> I've just tested with some generic MP4/MPV files with AAC or AC3 audio 
>> and
>> those work so the issue appears to be MP2 audio.
>>
>>
>>
>>
>>
> I tried some files with MPEG audio on the fire stick 4K and the audio 
> does not play, as you have reported.
> 
> leanfront uses only the formats that are supported by the android device 
> hardware. I have not included any software decoding support.
> 
> Supported formats are listed here 
> https://developer.amazon.com/docs/fire-tv/device-specifications-fire-tv-stick.html 
> 
> 
> This has not been a problem for US broadcasts, but it clearly is a 
> problem for other countries. I will take a look at it and see what can 
> be done.
> 
> Peter

When I have tried leanfront, the quality of linear playback has been 
really good with some programmes - mainly non-interlaced h264 with AAC - 
but interlaced video hangs while the audio plays on.   And IIRC 
multichannel audio may kill playback.

It seems that broadcasters in the UK often mix interlaced and 
progressive content, which can give the viewing experience an extra 
frisson of unpredictability.

I have tried re-encoding to progressive, and it worked, but it was a 
very slow cpu-intensive process.

John