Non-HD H.264 mp4 Audio Sync Issue

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  • #23714
    xdigital
    Participant

    The Audio Delay option in the control panel won’t go above 2.0 (when I try anything higher, even 2.1, and save the changes, I check back and find it reset to 0.0). The audio, even with the delay value at 2.0, is between 5 and 7 seconds ahead of the video. As the video plays, the audio continues to get farther and farther ahead, and the video looks like it’s playing in slow-motion. I have also tried with both frameskip options, to no avail.

    I am sharing the video files over FTP with WiiMC 1.1.8 from a 2.4GHz Core2Duo MacBook Pro with 4GB RAM running OS 10.6.8. The network router in-between is a Netgear WGR614v9 54Mbps wi-fi router. The video files in question are all H.264 720×400 encoded at 29.97 FPS, with AAC 5.1 audio at 24 kHz. Each file is in the area of 45-46 minutes in length.

    Is there some way around this issue? Since these are not HD video files, I should not be encountering the slow-motion playback issue which I have read about. Additionally, being able to stream media to my Wii is not such a high requirement that I am willing to re-encode hundreds of video files to make it “easier on my Wii” to play them back.

    Ah, if only Nintendo had thought ahead and made the Wii suitable for streaming media, they would have another leg up over their competitors. Stupid Gamecube in a fancy slim case with a new controller scheme…why u no awesome?

    So…anyway…if anyone has any idea how I can fix this issue, please let me know. I’ll continue Googling for a solution until then.

    EDIT:

    I also tried sharing the video files over SMB, in case there was some kind of arbitrary bandwidth limitation associated with FTP on the mac, but the audio is still 5-7 seconds behind, and even though the video now appears to be playing at something approaching normal speed, somehow the audio is getting even farther ahead even faster.

    This is very frustrating and makes no sense to me, as the video files I am playing appear to fall precisely within the bounds of what is acceptable and should play fine, based on what I’ve read in these forums and the documentation.

    Thanks,

    -Dash

    #29378
    cadbusca
    Participant

    My experience is anything over 640 wide is subject to the lag. Depends on the complexity of the encode as well which can increase the cycles needed to decode the video.Workaround is to use VLC-Shares.

    #29379
    xdigital
    Participant

    Ok, so to use a VLC share from a mac, I just use the streaming/transcoding wizard to down-convert it to an MPEG-2 stream, then add my computer’s IP into the Internet Sources section of the config file on my Wii’s SD card? I can’t just run the .bat like the forum sticky tells me to, since I’m not on Windows.

    Is there anything more to it, or is the most complicated part really just editing the config? Would you be able to recommend some specific VLC settings for streaming/transcoding to WiiMC over a network that will be more or less guaranteed to work (or should MPEG-2 video 1024kbps with MPEG audio 192kbps be sufficient)?

    Thank you.

    #29380
    cadbusca
    Participant

    Just follow the setup in the VLC-Shares thread http://www.wiimc.org/forum/viewtopic.php?f=8&t=562 and use the settings it gives you. The bat that I created was the forerunner that proved the concept that VLC-Shares automated.

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