On Thu, 2008-03-27 at 11:36 -0600, Robin Laing wrote: > Paul Lemmons wrote: > > I am looking for a way to look at an AVI file and see how it was encoded > > with enough detail that I could reproduce the process using transcode or > > mencoder. I have a media server (D-Link DSM520) that plays most videos > > absolutely perfectly. Some, though, it has trouble keeping audio sync. I > > would like to compare the videos that work without issue to those that > > have issues to see if I can identify what the differentiator might be. I > > should then be able to identify those with problems and re-transcode > > them to look like the files without the problem. That is the goal, anyway. > > > > I suspect this is real easy but I am just not finding it and I am > > completely Googled out. Any pointers in the right direction would be > > much appreciated! > > > > I had a weird situation on the weekend with a whole set of files that I > downloaded from usenet. All the audio was up to 15 seconds in advance > of the action. I found out it was related to the black before the video > started as the sound started as soon as I hit play on the DVD player. > > What I found was if I fast forwarded and then reversed, the audio was > almost synced. > > These were DVIX encoded files. They worked okay on the computer though. > > This points to an issue with the software on the player. > > File a bug report with D-Link when you get more info. Happens to me frequently on a standard DVD player using DVIX files (the player's an LG, which I'm otherwise very happy with). The sync problem seems to increase the further into the video you get. I suspect, off the top of my head, that it has to do with imprecision in specifying the frame rate at encoding time but I'm no expert. poc
