Streamclip Quirk?

[Lt. Dang]

Hello All,

My first post here so please forgive me if I have posted to the wrong section.

I am using Streamclip 1.2 to edit a couple of VOB files.

I use it to join them into one VOB which I then Save As a VOB back to an external disk.

However, if I use the Fix Timecode option it will not let me Save As a VOB. It will only let me Save As an MPG file.
This would not matter but my media player plays the resulting MPG file without sound but always plays a VOB file with no issues. This also happens if I edit or clip a single VOB file.

Am I using Streamclip incorrectly or missing a CODEC perhaps?
I have Alternative Quicktime 1.81 installed with the additional plugins selected.

Any help/advice gratefully accepted.

Regards,

Lt. Dang

[usually_quiet]

No, it's not a quirk. Allowing you to join VOBs and save them as a VOB is quirky. In general, you can't save anything you have edited/joined as a VOB. VOBs are a product of authoring, and need IFOs and BUPs to be useful with a hardware DVD player. VOB's are limited to 1GB in size and they have navigational information included in them that has to be added during authoring. mpgs have no such limitations.

I can't fathom why the sound is missing on the mpg. What type of mpg are you choosing to export? What types of files is your media player supposed to accept?

You could use the demultiplex option with MPEG Streamclip, and then use IFOEdit to create all the files needed for a menuless DVD, using the demultiplexed audio and video files. Burn to DVD using ImgBurn, and you will have a DVD that should be compatible with both software and hardware DVD player, assuming your burner and media are good.

(I almost forgot!) Welcome to our forums.

[Lt. Dang]

Thanks for the response.

I am not trying to author a structured DVD. Just using Streamclip to join separate VOBs into a single contiguous file for playback via a media player. The player has no problems playing a VOB file on its own without IFOs etc.

From your response I take it you are saying that any edit to a VOB file other than a simple join changes the structure/composition of the data in some way that requires it to be recoded? The Fix Timecodes function must therefore alter the data in this fashion.

I suppose I need to instead find out why Streamclip is producing an MPG file which plays back differently to a VOB file on my media player.

Regards,

Lt. Dang

[usually_quiet]

Fixing the timecodes would change the file, like editing. The video and audio aren't being recoded, but some of the other information that is present is being removed or new information is being added. Demultiplexing is not recoding either. It merely splits VOB into separate audio and video files, discarding the VOB-specific information. Multiplexing combines the files into one container, but not necessarily a VOB. Usually it's an mpg.

VOBs are a product of authoring. They are supposed to comply to the DVD standard, They are supposed be split into segments of 1 GB or less. What MPEG streamclip does by joining them into one file is a bastardization, not a valid VOB file. VOBs are supposed to have IFOs and BUPs associated with them. Your media player and most software players may play any VOB file by itself, but VOBs are not intended to be used like that. See https://www.videohelp.com/glossary?V#VOB to find out what is included in a VOB.

MPEG streamclip's mpg files play fine with the software video playes I have, but there may be something wrong with the files, although I don't know what it is. My authoring program rejects them though it is supposed to accept mpg files. If you don't need a structured DVD, try VOB2MPG to see if your media player can play the audio in the mpg files it creates.

[Lt. Dang]

Thanks for the helpful information.

I will give VOB2MPG a try and see f that does the job for me.

Regards,

Lt. Dang