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Autor Thema: Audio problems with Amazon Prime Videos  (Gelesen 766 mal)

MyronAub

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Audio problems with Amazon Prime Videos
« am: August 06, 2019, 22:27:19 »
Hi,

I have just purchased TS Doctor 2.2 and it works great with Netflix and Sky recordings (via a Hauppauge Colossus 2 device) but when I use it to fix Amazon Prime Videos I end up with no audio.

The weird thing is that MediaInfo reports the corrupted original file only has 5s of audio when actually the audio always plays for the full duration of the video (e.g. for 3 hours in the file below:)


ORIGINAL FILE Audio
ID                                       : 4352 (0x1100)
Menu ID                                  : 1 (0x1)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : 129
Duration                                 : 5 s 216 ms
Bit rate mode                            : Constant
Bit rate                                 : 640 kb/s
Channel(s)                               : 6 channels
Channel layout                           : L R C LFE Ls Rs
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Bit depth                                : 16 bits
Compression mode                         : Lossy
Stream size                              : 408 KiB (0%)
Service kind                             : Complete Main

Whereas the TS Doctor Fixed File has the correct duration but no sound actually plays...
FIXED FILE Audio
ID                                       : 4352 (0x1100)
Menu ID                                  : 1 (0x1)
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Format version                           : Version 2
Muxing mode                              : ADTS
Codec ID                                 : 15-2
Duration                                 : 3 h 16 min
Bit rate mode                            : Variable
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Delay relative to video                  : -420 ms
Language                                 : English
Language, more info                      : Clean effects

Does anyone have any ideas how I can get audio to work on Amazon Video fixed files?

Cypheros

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Re: Audio problems with Amazon Prime Videos
« Antwort #1 am: August 06, 2019, 23:52:02 »
What are the audio settings for the Haupauge?

AAC or AC3?

MyronAub

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Re: Audio problems with Amazon Prime Videos
« Antwort #2 am: August 07, 2019, 22:55:55 »
What are the audio settings for the Haupauge? AAC or AC3?

I can't find any way to choose either however I do have LAV Audio AC3 decoders installed so I assume AC3 (and Netflix and Sky recordings do record using AC3 and they work fine.)

I generally record TV show episodes and one weird thing I have noticed is that when I play back the TS Doctor Fixed file, the initial mouse click is audible when I press Play, the Amazon 15 second promo trailer is audible too but as soon as the main video starts playing at around 20s the sound just stops and there is only silence.

Cypheros

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Re: Audio problems with Amazon Prime Videos
« Antwort #3 am: August 08, 2019, 12:26:05 »
I guess the audio codec is changing from AAC to AC3, what is not allowed regarding mpeg standards and maybe kill the audio playback. Try to cut off the promo trailer.

MyronAub

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Re: Audio problems with Amazon Prime Videos
« Antwort #4 am: August 13, 2019, 08:32:33 »
I guess the audio codec is changing from AAC to AC3, what is not allowed regarding mpeg standards and maybe kill the audio playback. Try to cut off the promo trailer.

Thanks! Yes, that was it! If I wait until the promo trailer has finished and only start the recording once the main video starts then the audio is recorded correctly and plays back as expected.

Thank you for your help.

 


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