adamschroeder
19th January 2004, 19:35
I know this is a long shot... if anyone has any suggestions we would greatly appreciate it. Right now it seems like we are just grasping at straws.
Here are some ideas we have running around in our head.
1.) the problem has something to do with the deinterlacer or line double on DVD player... or possibly the playback device when dealing with two different types of video.
2.) the white levels on the computer generated graphics are level 255 white, while the white shot on video would be less than this....
Here is the situation:
There is a very strange audio problem with a DVD we created using TMPGencoder and TMPG DVD Author 1.5 on SOME players.
The audio is a PCM stream as mentioned above. We had created a 14 minutes clip that consisted of a spokesperson keyed over computer created graphics and several talking heads shot with a white background (but not keyed). The source was edited on an Avid DS system and exported using Huffy2.2, the audio is synced perfectly on the huffy AVI.
On my Panasonic XP30 DVD player the audio on the talking heads was slightly out of sync, while the audio from the spokes person was fine. The video switches between both types of scenes probably 10 times throughout the video.
On all other DVD players we tested and all software DVD players on the computer the audio is synced perfectly throughout the entire video.
Interestingly, when I disabled the progressive output on my Panasonic it fixed the problem.
Our client has informed us that they are expierencing the same audio syncing problems (with a Pioneer player and Pionneer Plasma screen) although disabling the progressive output on their player did not fix the problem.
We burned a new DVD using the latest versions of the TMPG encoder and DVD author and I encoded the audio to AC3 format.
This seemed to fix the problem on my player, the audio and video played fine throughout the entire video with or without progressive output enabled.
However when we tried to verify that this solved the issue and played the old DVD. The old DVD which yesterday had reliably produced audio syncing problems was suddenly working fine.
Obviously this doesn't make any sense and is probably impossible to troubleshoot but I thought I would give it a shot in case you have ever heard of similar problems or have any suggestions.
We have sent the new DVD along to the client but they are still reporting the same audio problems. The client is at trade show in Orlando so we do not have access to there equipment. And since we can no longer reproduce the error on the Panasonic we are at a loss.
The client is ouputing from the DVD player to the plasma screen using the composite output, and using the DVD player to output stereo audio to a wireless headphone transmitter. If the wireless transmission is a problem then it should be wrong throughout.. not just on certain scenes.
Any thoughts or suggestions would be greatly appreciated!
Thanks for your time,
Adam Schroeder
Here are some ideas we have running around in our head.
1.) the problem has something to do with the deinterlacer or line double on DVD player... or possibly the playback device when dealing with two different types of video.
2.) the white levels on the computer generated graphics are level 255 white, while the white shot on video would be less than this....
Here is the situation:
There is a very strange audio problem with a DVD we created using TMPGencoder and TMPG DVD Author 1.5 on SOME players.
The audio is a PCM stream as mentioned above. We had created a 14 minutes clip that consisted of a spokesperson keyed over computer created graphics and several talking heads shot with a white background (but not keyed). The source was edited on an Avid DS system and exported using Huffy2.2, the audio is synced perfectly on the huffy AVI.
On my Panasonic XP30 DVD player the audio on the talking heads was slightly out of sync, while the audio from the spokes person was fine. The video switches between both types of scenes probably 10 times throughout the video.
On all other DVD players we tested and all software DVD players on the computer the audio is synced perfectly throughout the entire video.
Interestingly, when I disabled the progressive output on my Panasonic it fixed the problem.
Our client has informed us that they are expierencing the same audio syncing problems (with a Pioneer player and Pionneer Plasma screen) although disabling the progressive output on their player did not fix the problem.
We burned a new DVD using the latest versions of the TMPG encoder and DVD author and I encoded the audio to AC3 format.
This seemed to fix the problem on my player, the audio and video played fine throughout the entire video with or without progressive output enabled.
However when we tried to verify that this solved the issue and played the old DVD. The old DVD which yesterday had reliably produced audio syncing problems was suddenly working fine.
Obviously this doesn't make any sense and is probably impossible to troubleshoot but I thought I would give it a shot in case you have ever heard of similar problems or have any suggestions.
We have sent the new DVD along to the client but they are still reporting the same audio problems. The client is at trade show in Orlando so we do not have access to there equipment. And since we can no longer reproduce the error on the Panasonic we are at a loss.
The client is ouputing from the DVD player to the plasma screen using the composite output, and using the DVD player to output stereo audio to a wireless headphone transmitter. If the wireless transmission is a problem then it should be wrong throughout.. not just on certain scenes.
Any thoughts or suggestions would be greatly appreciated!
Thanks for your time,
Adam Schroeder