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H.264 to mpeg2 – very slow
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Hi Raven,
The truth is that, at least my self, need to learn more about H264.
MPG2 is around since 20 years, and the compression system and GOP structure is quite easy to understand.
H264 uses more complex compression techniques. So time to look for a document where everything is clearly explain. Any suggestion.
What I agree is that you should have started ripping the DVD to a high quality editable .mov. DV50, 8b Unc or even Prores.
Go MPG2>h264>MPG2 I don’t think is a good workflow.
Cheers,
rafael -
[Daniel Low] ” H.264 is capable of 10bit 4:4:4 at 4K to over 950Mb/s – andto wide spread acquisition formats like AVCHD “
But I think you need special software to compress with those HQ profiles.
MPG-2 is capable of 422 but you can not make a .m2v 422 with Compressor.
Rafael -
[Daniel Low] “Guys: Raven wants to know why one H.264 clip takes longer to compress than another H.264 clip. “
I now quote my last post on this thread.
[Zane Barker] “Not ALL h264 files are compressed equally. One of your files probably has a much higher amount of compassion thus taking it much longer to convert to something else. “
There are no “technical solutions” to your “artistic problems”.
Don’t let technology get in the way of your creativity! -
Hi Zane,
Normally acquisition formats are really fast to encode although some of them can take a certain time to decompress.
Delivery formats can take long to compress but they must be able to be decompress in RT.
rafael -
It’s been pointed out to me numerous times that I should not have gone from m2v to H.264 to m2v (which is unrelated to my original question, but I do appreciate the comments.) The problem was that the source DVD was copy-protected so my options were limited. (I wanted to simply extract the pertinent m2v file and burn a backup from that.) I had to use what I had at the moment (Handbrake, which only does H.264 and mpeg-4 I believe) since I didn’t have much time to look for other options.
So what are methods to rip a copy-protected DVD to a high quality .mov? (Bearing in mind this was strictly to create a backup copy for use at a conference – just in case the original when missing, snapped in two, etc.)
Let me know if I should start this as a new topic in a different forum.
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Raven,
Well, two things, if the material on the disc was truly a copyright violation to copy, then you’re stuck. If not, there are other methods to get around encryption besides Handbrake. (Odd, that name congers up scenes of Emergency!, which is another name for that thing in cars.)
When you capture from a disc player through a deck to some NLEs or third party capture software, encryption is sometimes not detected. Remember though, if it is protected, you stand liable for violations.
I don’t remember seeing this mentioned in your thread, but have you tried MpegStreamclip to export from the VOB files on the disk? Don’t know if it will see the encryption or not, worth a try as it’s free.
Have a wonderful day.
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Hi Raven,
If you have the right to copy the DVD, you can use MacTheRipper (https://www.mactheripper.org/).
If you don’t have the right you know you can’t do it.
Extract the VOBs. Then with MPGStreamClip, convert the MPG2 to QT.mov.
Export at least as DV50 to get the most of the picture.
Never export as DV.
Rafael -
Compassion has nothing to do with it 😉
Nor does higher compression.
What I think you might be referring to is GOP structure, reference frame distance, number of b-frames and the like.
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Please post back saying what solved your problem. It could help others, and saying ‘thanks’ is free!
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