[RPi3B/RPi3B+] 3D MVC Playback problems

    Hi Everyone,


    I have recently been looking for a way to play my 3d bd iso's in native format (MVC).
    I've got a raspberry pi 3B and 3B+, and running libreelec 9.2.8.
    Seems like this version should be te best for use with 3D MVC video's on a raspberry pi ?

    The 3B can play 3d MVC iso's fine without problems, but does not give any sound, not trough decoding trough LPCM or passtrough, the 3B+ gives perfect sound, but does give video artifacts all over when playing 3D BD iso's (MVC).

    How can I fix this problem, so I can at least use one of them to play normally with audio, I prefer decoding to 5.1 LPCM since that works best with my Meridian DSP digital surround theatre..

    Anyone knows how to fix my problem ?

    Thanks in advance,

    Hi there,


    Thanks for your message.

    I thought an OC was not needed for a pi3 model, only for pi2 models playing 3d video's, since the pi3 should have enough horse power ?

    Specially the 3b+ ?


    Anyway, I will try to OC the pi, I think LE has some options for this.. ?

    I have changed force_turbo=1 from 0 to 1, this should make the performance better, from what I see.


    Also I see that the 3B+ does not need a further more OC, since it is already running 1400mhz, seems like my other pi3 is a regular B model, and should be clocked at 1200Mhz ?
    Anyhow, after further testing with the 3B+ still the same problem, no sound at all, and graphic artifacts all over the place running a 3d bd iso like Avatar for example..

    Thanks for the log. If it's a legal ISO, then it looks like an FFmpeg bug to me:

    Code
    2026-04-18 13:59:21.868 T:1523102592   DEBUG: ffmpeg[5AC8B380]: [mpegts] PES packet size mismatch
2026-04-18 13:59:22.060 T:1523102592   DEBUG: Previous line repeats 3 times.
2026-04-18 13:59:22.060 T:1523102592   ERROR: ffmpeg[5AC8B380]: [mp3float] Header missing
2026-04-18 13:59:22.518 T:1523102592    INFO: ffmpeg[5AC8B380]: [mpegts] decoding for stream 12 failed
2026-04-18 13:59:22.518 T:1523102592   DEBUG: ffmpeg[5AC8B380]: [mpegts] Could not find codec parameters for stream 5 (Subtitle: hdmv_pgs_subtitle (pgssub) ([144][0][0][0] / 0x0090)): unspecified size

    You can try to compile your own LE with latest FFmpeg, but you need skills for that.

    We don't support 3D on newer LE versions, sorry. /shrug

    Thanks for looking into the log file.


    After further testing, and hooking the Raspberry Pi straight into my beamer, audio works perfect. (through the beamer speaker)
    I think now there is a HDMI link problem with my Meridian HD621 and this device, a PlayStation 3 Phat works perfect with my Meridian and also sends out 3d MVC from the same BD iso.

    This makes me assume the pi is doing it's job wel..

    Quote from Da Flex

    then it looks like an FFmpeg bug to me:

    In logs "error" does not always equal a fatal problem. In fact most of the time it is nothing more than the application following some kind of if/then/else decision tree when processing data. Is the file mp3; no (so log error on that path, keep processing) is more likely to be the cause (or something of that nature). If you read the log further the file is clearly being played so it wasn't fatal.

    BokitoNL You didn't share the output of pastekodi so we don't see the system log (only kodi log) but I'm not seeing anything in the kodi log to indicate an HDMI output problem. I would advise to check cables and ports and also ensure config.txt is in a clean or default state without any kind of helper overrrides being used.

    Quote from BokitoNL

    After further testing, and hooking the Raspberry Pi straight into my beamer, audio works perfect. (through the beamer speaker)

    Please check the LE audio settings in expert mode. The 44.1kHz sampling rate is common, but could be too low for some hi-res audio codecs. So your beamer seems to handle that sampling rate, but the Meridian AVR could have a problem with it.

    Code
    2026-04-18 13:59:22.897 T:1906250624   DEBUG: CActiveAESink::OpenSink - SinkPi Initialized:
2026-04-18 13:59:22.897 T:1906250624   DEBUG:   Output Device : HDMI
2026-04-18 13:59:22.898 T:1906250624   DEBUG:   Sample Rate   : 44100
2026-04-18 13:59:22.898 T:1906250624   DEBUG:   Sample Format : AE_FMT_FLOAT
2026-04-18 13:59:22.898 T:1906250624   DEBUG:   Channel Count : 2
2026-04-18 13:59:22.898 T:1906250624   DEBUG:   Channel Layout: FL, FR
2026-04-18 13:59:22.898 T:1906250624   DEBUG:   Frames        : 2205
2026-04-18 13:59:22.898 T:1906250624   DEBUG:   Frame Size    : 8

    chewitt : Thx for explaining.