rhaz
10th May 2013, 21:09
Actually its not just MeGUI, I searched entire net, mp4box, megui, yamb and etc. I even tracked down a thread in these forums from 2006 with same question: How in the world to mux audio with negative delay and get a proper results?
I encode .mkv (run File indexer and make .avs first) into lower quality .mp4 videos (using x264) and I also convert audio into AAC in .mp4 format too. So what I do is mux mp4 video and mp4 audio together into one mp4. And it works all fine with included MP4 muxer into MeGUI. It also works fine with positive delay, but when I want to add negative delay i.e. -200 miliseconds, all the fun begins.
I already posted that problem in one of the MeGUI threads, but no response, so I am creating this thread. There's a link to a log of muxing with negative delay: https://pastee.org/5y78n
Now what I get after muxing with negative delay:
I get .mp4 with double length of the movie, which means, somehow it muxes in the same movie twice and doubles its length and it also reduces its quality to fit into same exact size which you would get by using no delay or positive delay to get a fine working valid mp4. In overall its just some crazy shit. And I tried doing same with different movies, same defect.
Why in the world there is no such a simple tool which is able to mux negative delay audio? With mkv its a piece of cake, but mp4 makes it special for some reason.
I encode .mkv (run File indexer and make .avs first) into lower quality .mp4 videos (using x264) and I also convert audio into AAC in .mp4 format too. So what I do is mux mp4 video and mp4 audio together into one mp4. And it works all fine with included MP4 muxer into MeGUI. It also works fine with positive delay, but when I want to add negative delay i.e. -200 miliseconds, all the fun begins.
I already posted that problem in one of the MeGUI threads, but no response, so I am creating this thread. There's a link to a log of muxing with negative delay: https://pastee.org/5y78n
Now what I get after muxing with negative delay:
I get .mp4 with double length of the movie, which means, somehow it muxes in the same movie twice and doubles its length and it also reduces its quality to fit into same exact size which you would get by using no delay or positive delay to get a fine working valid mp4. In overall its just some crazy shit. And I tried doing same with different movies, same defect.
Why in the world there is no such a simple tool which is able to mux negative delay audio? With mkv its a piece of cake, but mp4 makes it special for some reason.