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  1. #1
    Junior Member
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    BBC IPlayer runs late and slow

    BBC radio runs both late and slow. I shall explain.

    When I switch on in the morning the time checks are in sync with real-life, but progressively during the day the time slips - as much as an hour or so at the end of the day.

    And speech is ever so slightly slow - with the effect that presenters' voices sound deeper than they should.

    I'm running LMS (Max2Play) on a Raspberry Pi. I have a mix of original Squeezebox devices and RPi using piCorePlayer. I've tried limiting the number of devices running simultaneously, but it make no difference. I have updated kernels and versions of everything else I can think of.

    I have terrific broadband and a fast home wifi network.

    Any thoughts?

  2. #2
    Senior Member
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    Quote Originally Posted by johnbeverley View Post
    Any thoughts?

    What version of plugin ?
    What settings ?
    Have you changed the default Settings/Advanced/Filetypes AAC setting ? Can it still play native ?
    Does this happen on a single Touch/Radio player, not synced ?
    What other plugins installed ?

    BBC audio is at 48kHz- it "feels" like audio is being played back at 44.1kHz - this can happen if LMS settings are changed so that a player should play in PCM and not in Flac or native codecs.

  3. #3
    Junior Member
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    May 2015
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    Settings

    Quote Originally Posted by bpa View Post
    What version of plugin ?
    What settings ?
    Have you changed the default Settings/Advanced/Filetypes AAC setting ? Can it still play native ?
    Does this happen on a single Touch/Radio player, not synced ?
    What other plugins installed ?

    BBC audio is at 48kHz- it "feels" like audio is being played back at 44.1kHz - this can happen if LMS settings are changed so that a player should play in PCM and not in Flac or native codecs.
    Thanks for speedy response.

    I'm running BBC iPlayer (1.5.4.5)

    Configured thus:

    Live stream Dash>HLS>MP3>FlashAAC
    On Demand Dash>HLS

    Settings/Advanced/Filetypes:

    AAC:
    AAC Disabled
    FLAC Disabled
    MP3 Disabled
    PCM faad

    Other plugins:

    BBC iPlayer Extra
    Date & Time
    Network Test
    Powersave
    Radio
    Visualiser Screensaver

    The phenomenon occurs across the estate, with different devices running independently. Coincidentally I cannot get synchronisation to stick, and have to re-enable it manually each time I want to use it.

    Regards
    John

  4. #4
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    Quote Originally Posted by johnbeverley View Post
    AAC:
    AAC Disabled
    FLAC Disabled
    MP3 Disabled
    PCM faad
    This is your problem. You have only enabled AAC to PCM transcoding. PCM has no header providing audio format details and so player assume a 44.1kHz 2ch 16bits stream.

    Use defautl AAC setting (i.e. enable AAC natove, AAC Flac ) and all will be OK.

  5. #5
    Junior Member
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    18

    Thank you

    Quote Originally Posted by bpa View Post
    This is your problem. You have only enabled AAC to PCM transcoding. PCM has no header providing audio format details and so player assume a 44.1kHz 2ch 16bits stream.

    Use defautl AAC setting (i.e. enable AAC natove, AAC Flac ) and all will be OK.
    I shall try that. Thank you.

  6. #6
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    Worked. Thanks again.

    Quote Originally Posted by johnbeverley View Post
    I shall try that. Thank you.

    Worked. Thanks again.

  7. #7
    Member NMarshall's Avatar
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    BBC IPlayer runs late and slow

    I had the same problem for around 36 hours, then the delay disappeared. So
    it must have been a BBC issue, rather than the iPlayer plugin.
    Neil

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  8. #8
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    Quote Originally Posted by NMarshall View Post
    I had the same problem for around 36 hours, then the delay disappeared. So
    it must have been a BBC issue, rather than the iPlayer plugin.
    Delay is not the same as slow. OP problem was that plaback ran at about 90% normal speed so 1 hours program would start at right time but take about 66 minutes to play.

    A delay is when a program starts late but runs at the correct speed and so completed in the correct duration.

  9. #9

    Iplayer running late and slow on one device only

    I have the same problem but it limited to only one device - My very first Slim Devices Squeezebox running firmware 40. iPlayer is v1.5.3 and LMS is 7.9.1 . All AAC file settings are 'on' and my 2 Picore players, 2 ipads and 2 iphones all play at the correct speed. It's most frustrating as after many years of not working with Spotify the Spotty plugin as brought it new life ! Any thoughts apart from 'get a more modern device?'

  10. #10
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    Quote Originally Posted by mikebainbridge View Post
    I have the same problem but it limited to only one device - My very first Slim Devices Squeezebox running firmware 40. iPlayer is v1.5.3 and LMS is 7.9.1 . All AAC file settings are 'on' and my 2 Picore players, 2 ipads and 2 iphones all play at the correct speed. It's most frustrating as after many years of not working with Spotify the Spotty plugin as brought it new life ! Any thoughts apart from 'get a more modern device?'
    The player with firmware 40 is a SB1 which cannot play AAC natively and cannot play Flac so AAC is transcoded into 48KHz PCM which has no header so SB1 plays it has 44.1Khz. I'm not clear what you are talking about wrt Spotty as this a BBCiPlayer thread.

    That is the problem and has been true for all files & stream 48kHz AAC on SB1 - not just BBCiPlayer and known for a long time ( http://forums.slimdevices.com/showth...48KHz-playback )

    AFAICT no solution has been posted over the years but IIRC for most of that time 48kHz was only used in WMA and DVD and transcoding WMA solution for SB1 did resampling.

    The only solution I can think of is to add sox in the "AAC-> PCM" trasncoding for SB1 to ensure a 44.1kHz but this will put a load on the LMS processor.
    No details on your LMS server - so the following is for a Linux based server.
    If lines below are edited to use correct MAC address (i.e. replace with AMAC of your SB1) and then saved in a custom-convert.conf file (make sure tabs are saved as tabs and not spaces) in the same directory as the LMS convert.conf file then after LMS restart LMS will always convert AAC streams to the device with MAC address into 44.1Khz streams.

    MAC address of player can be found in LMS WebUI Setting/Information tab or on label of player.

    Code:
    aac pcm * aa:bb:cc:dd:ee:ff
    	# IF
    	[faad] -q -w -f 1 -b 1 $FILE$ | [sox] -q -t wav $FILE$ -t raw -r 44100 -c 2 -2 -s -
    In theory for all SB1 type devices - the following would work.
    Code:
    aac pcm Squeezebox *
    	# IF
    	[faad] -q -w -f 1 -b 1 $FILE$  | [sox] -q -t wav  $FILE$ -t raw -r 44100 -c 2 -2 -s -
    Last edited by bpa; 2018-02-25 at 02:56.

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