View Full Version : pts jump in 464 output

April 8th, 2006, 01:19 AM
I've run the output of 464 through project-x for one reason or another and have noticed that occasionally there is an inexplicable PTS jump reported by project-x. pvastrumento reports a problem as two dropped video framesl, but curiously at a different time offset. Running a QSF on file reveals no complaints, but the output of the QSF also has the problem according to project-x and pvastrumento.

[05:23:42.484] -> starting export of video data @ GOP# 0
[05:24:14.703] !> dropping GOP# 1290 @ orig.PTS 00:10:19.080 (55717200)
[05:24:14.734] -> Pics exp/cnt 12/12, inGOP PTS diff. -40ms, new Timecode 00:10:18.880
[05:24:14.750] !> PTS difference of 43200 (00:00:00.480) to last exported GOP detected
[05:24:14.750] !> dropping useless B-Frames @ GOP# 1291 / new Timecode 00:10:18.880

I no longer have the original transport recording, but when I processed it with VR, no errors were reported or noted in the logs. I also happened to run the transport file through project-x and didn't notice any problems with it either.

A short trim that includes the error has been uploaded as pts_jump.mpg and this message sent as an email to support.

April 8th, 2006, 09:50 AM
thanks for uploading and sending the email. We will check it out in the next day or two.

April 8th, 2006, 05:40 PM
I've caught it in action and have uploaded two additional files - sample2.mpg is the section of the output from VR that has the jump, sample2.ts covers the area in the recording file. There doesn't seem to be anything wrong with the input file.

If I simple demux the audio and video from the VR output without attempting to do any sync / repair, they appear to be in sync for the entire file, so it seems its just the PTS that is wrong.

April 9th, 2006, 12:34 PM
DrP: How do I re-create the ProjectX message? So far, I've processed all the files you've uploaded and haven't seen any PTS warnings.

April 9th, 2006, 02:08 PM
I've uploaded my x.ini file, copy it to your project-x directory and see if it shows the jump.