Timeline weirdness after handbrake encode

[wayner]

I am having trouble playing back some files in SageTV and this just started recently. Look at the timeline in this screenshot.


This is a 30 minute recording in Sage done by a Hauppauge 1850 via s-video inputs. The originally captured file was fine. I run the original file through Comskip and I then run the file through handbrake - this is all done using an SJQ process. The handbrake call is:

handbrakecli.exe -i Inputfile -o outputfile -f mp4 -4  --deinterlace=fast -w 720 --loose-anamorphic  -e x264 -q 20 -r 29.97 --pfr  -a 1 -E faac -B 160 -6 dpl2 -R Auto -D 0 --gain=0 --audio-copy-mask none --audio-fallback ffac3 "

I got these parameters from looking at the handbrake logs when running handbrake using the iPad preset.

After running through handbrake the I have an mp4 file and the file looks like it has an extra 24:36 of pre-show padding??? And this preshow padding is missing, just like when you are missing the first little bit of a show and it shows up as red in the timeline.

In addition when you try to play the file in Sage it loops the first second over and over. If you press skip then it will skip fwd and the file will play without issues.

I have tried running these files through VideoReDo and it doesn't like them either. When trying to do a Quick Stream Fix it gets stuck shortly into the file.

Note that this does not happen all of the time, I would say I have this problem on about 20% of the files that I run through this process and it just started recently. Maybe an uprade of Handbrake caused the probs?

Is this due to bad indexing in the video file?

Has anyone seen this before? Any suggestions?

[nyplayer]

When you transcode the file are you cutting commercials??? ... if not are you Touching the file with the timestamp of the original file?

[wayner]

No I am not cutting commercials at all, other than creating a comskip edl file prior to running handrake. That is unless handbrake is trying to use the edl files to cut the commercials but I doubt it.

To cut commercials wouldn't you have to do something like create a vprj file and run it through VRD or something like that?

[nyplayer]

Originally Posted by wayner

No I am not cutting commercials at all, other than creating a comskip edl file prior to running handrake. That is unless handbrake is trying to use the edl files to cut the commercials but I doubt it.

To cut commercials wouldn't you have to do something like create a vprj file and run it through VRD or something like that?

The timestamp has to be the same as the original file or else Sage will not correctly see the timeline.

[wayner]

I am not consciously doing anything to the timeline but maybe running it through handrake slightly adjusts the timestamp in some files if there are a few bad frames somewhere (remember this problem only occurs about 25% of the time) which screws things up. Does that make sense?

Any idea on how to resolve this? Do you have this problem with your process as it seems pretty similar to what I do?

[nyplayer]

I use a utility touch.exe to get the timestamp from the original file and alter the timestamp of the new file.

see this post.
http://forums.sagetv.com/forums/show...postcount=1355

[wayner]

Sorry, I was misunderstanding you above when you were saying timestamp I was interpreting this as time index.

So using touch with the -r parameter sets the timeline of the "outputfile" to that of the "inputfile: if used as : touch.exe -r inputfile outputfile, correct?

I will have to modify my code. Slugger convinced me of the joys of Groovy so I write all of my SJQ4 routines in Groovy and don't use batch files at all. But it is easy to run a batch file from groovy and/or I can use a groovy or java function to do this timestamp updating.