irriadin wrote:Could I submit my videos via disc in lossless .AVI using something like Lagarith / UTVideo?
I always submit that plus an mpeg2.
irriadin wrote:Could I submit my videos via disc in lossless .AVI using something like Lagarith / UTVideo?
Kazemon15 wrote:I sent one of my files as MP4 ACC.Only because I could not find my uncompressed lossless version of it though...
Same here.Rider4Z wrote:Kazemon15 wrote:I sent one of my files as MP4 ACC.Only because I could not find my uncompressed lossless version of it though...
all of my files were mp4 aac.
Rider4Z wrote:Kazemon15 wrote:I sent one of my files as MP4 ACC.Only because I could not find my uncompressed lossless version of it though...
all of my files were mp4 aac.
BasharOfTheAges wrote:Actually, the biggest problem with h264 playback in a con environment is dealing with the folks who insist quicktime will work.
mirkosp wrote:The problem with MP4 and AAC is that the sync will vary based on the muxer, encoder, and decoder. You can get a 1-2 frames desync in worst cases, which is not nice for AMVs. MP3 would have the same issue if it wasn't for the fact that LAME is so widespread that everything is synced based on that. AAC otoh has a few common formats: nero was very popular (and used in older builds of zarxgui), but nowadays the best encoder is apple's so zarxgui also shifted to qtaac. The muxer also has a say: zarxgui uses L-SMASH nowadays (and it's not the only one), but mp4box isn't exactly uncommon either. Couple the fact that there are o9k standards for MP4 and you can guess where this goes.
Vorbis/FLAC audio should be preferred when possible, as well as MKV as a container, as far as online distro goes.
The "MP4 for best compression" is particularly misunderstandable... the compression work on the video is done by the codec, which I guess you were referring to x264 in this case. And you definitely can and should mux avc videos in MKV nowadays (I'd actually go so far as to start suggesting 10bit encoding, but I think it's a bit too early for AMVs right now).
So yes, in a con playback situation, which will have further audio delay based on the speaker positioning and room dimension, audio sync is a particularly important thing, and a 1-2 frame desync will only get worse, so that's why a reliable format is even more important.
That said, for cons, if possible, a lossless video codec along with PCM audio in avi would be the best thing, since it allows the contest coordinator to encode to their best preferred format (unless they clearly state a preferred set of formats and settings to use, in which case going with that could be better if it isn't too much of a hassle). With the rules that were available this year for AX, xvid q1 with pcm audio in avi was possibly the safest solution, but if they can take UTVideo, I'd go with that starting next year.
irriadin wrote:Could I submit my videos via disc in lossless .AVI using something like Lagarith / UTVideo?
Melichan923 wrote:The thing is, I upgraded to the newest version of Zarx in February and I continue to have this issue. My very first encode with it came out fine, but I think that was a coincidence. The demuxing and replacing with a delayed mp3 and remuxing solution works sometimes, but still I can see an ever so slight difference from the test previews with other codecs I render from Vegas. Maybe another container will work like you said.
mirkosp wrote:I'll also note here that muxing with x264 with the l-smash patch and using als audio has proven to be the most sync safe solution in mp4, as extensively tested by Quu. Quite obviously, since als does not employ mdct.
So yes... mp4 and aac make for some major playback hell as far as sync goes. Hence why one should just use mkv and another audio format (ones that don't use mdct) for online distro. Makes it a lot easier. >_>
Or yes, als audio in mp4, if one is so inclined, but you know, fuck that.
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