Luc, the video producer, encodes the audio to AAC separately(free Nero AAC encoder iirc), and then muxes that with YAMB and the H264 MP4 video in to an MP4 video file, which is what gets uploaded to Youtube. I mix stuff for Extelevisions Youtube channel and we finally figured out the latency after going throught the complete tool chain. For that reason 16-bit PCM audio is amongst the safest choices, as is OGG audio(sample accurate) if the client can effortlessly play it.įor example. If you're going to send a client some video, test your workflow to make sure you don't screw up your audio in the process, because MP3 and AAC encoding do that. I've had to deal with this for quite some time. Every time you upload to Youtube, and the site transcodes it(always), the sound is sample-rate-converted to 44kHz and delayed by 1000-3000 samples. It produces a significant delay on encoding. Some advice on what kind of audio to use in videos.ĪAC encoding is pure shit for sync. Being too lazy not to try and make it happen when other people do is your choice to make or not. Making it happen by yourself is no excuse, if enough people do make it happen in a reasonable amount of time is where your solution currently is. I know you guys want an all-in-one package, but this stuff probably is not getting that level of focus, when there's so much other stuff people need to make workflows happen. If it's an MP4, use MP4box or one of its frontends like YAMB. If it's a Quicktime, you can use Quicktime Pro and probably some other apps out there, since virtually all post productions in the world use Quicktime. If you've got an AVI, you can use VirtualDub. For muxing audio tracks in to existing videos, replacing the audio track that's already there :
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