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Forum: General Discussion

Topic: just coverted 600+ videos im amazed!!! - Page: 1

由于该帖子的部分内容已年深日久，可能包含陈旧过时或描述错误的信息。

yeah guys just converted 600+ videos to .vob since most were avi some mpeg and mp4...im so amazed of the quality playback on virtual dj i can actually backspin and scratch with no problems i like i like...i know vob is hella space consuming but ask me "do i care?" hell no not when the quality is dvd and the playback is awsome not to mention n$100.00 for 1 t.b. i can still fit in a couple g's of videos in a t.b. so damm worth it...peeps dont mess with other formats there is only one format that kinda works like vob...but really i rather use vob from now on...if you are a pro and dont want problems glitches, nicks and slow downs while loading a video while the other is playing i would change to vob....took me almost 2 days none stop but well worth it.
 
发表时间 Thu 01 Oct 09 @ 5:27 pm
Was there some sort of automation software that you used to do that many????

Any what benefits do you see in using VOBs instead of divx, or xvid, or anything else?
 
magic video converter its awsome just load all your video files and choose to what format you want to convert too. it converts any video format to any other video format including flv and mkv files.
 
been using that for about two years now and always recommend it...
 
I use aimersoft to rip and or convert. just set it and forget it. i also use vob on my gig machine i only load vob videos on it.
 
Converting videos is a drag.. luckily i dont have to do that. I get my videos in Mp4 format. I also get 1080p videos too.
 
Caliente123 wrote :
Converting videos is a drag.. luckily i dont have to do that. I get my videos in Mp4 format. I also get 1080p videos too.


Good deal, me too. :)
 
mp4? how can u backspin isnt it harsh on the system mp4 are the most hard on cpu to uncompress with virtual dj..some of my vids are originally mp4 but i convert them back to vob i can play vob like any mp3 works great..mp4 is too compressed for me though they look very nice. just keep al your original settings and bam all 600 at once.
 

Well converting those files back still creates loss...

It's all about H.264/AAC - by far the most efficent codecs going.

I can't backspin with them in VDJ but I'd never do that live anway.
 
does not create loss from what it already is as mp4,avi etc. to vob...its like saying mp3s lose by converting back to wave! if your mp3 is 128 kbps yeah the file is lossy already but you get same quality when you convert to wave it doesnt get worse.
 
VOB (MPEG2) is a compressed format and inferior to H.264, bagpuss is 100% right on this. The math (horizontal pixels x vertical pixels x framerate x 24 bit colour (16.7m)):

720 x 480 x 29.97 x 24 = 248,583,168 bits per second

If your music video is 4 minutes long (x 240), the video portion will be 59,659,960,320 bits. To convert into megabytes we divide by 8,388,608 (8 * 1,024 x 1,024). An uncompressed music video should be about 7GB!

VOB uses MPEG2 as it's video compressor and the format does not compress as well as H.264.
 
Andrew it's GREAT to see you posting again, I wish we had a video section and you were the President and Prime Minister in charge. Would you please address the poster here regarding him converting Mp4's to Vob.

Would it be correct to say the result would be a much larger file size with no increase in quality and possibilly just the opposite?
 
Hehe thanks djrenee. You're right, there will be a reduction in quality and an increase in filesize. It's understandable that not everyones gig machines are able to mix mpeg4 videos well and that this conversion may have been necessary for the op although it's the audio that can suffer the most, i.e. going from an aac file to an mp2 audio file (unless wav is being used).

If you are going to convert your entire collection make sure to always keep your source material, so that when you do get a more powerful machine your collection is the best quality it can be. If your machine can only handle vob well then it's best to build your collection using dvds and vob files rather than avi/mp4 formats and having to convert them afterwards - if you're buying music from iTunes and cannot play mp4 in Virtual DJ in realtime then you have little choice but to transcode your files to vob files, but do be aware there is a quality loss.
 
bagpuss wrote :

It's all about H.264/AAC - by far the most efficent codecs going.



I completely agree!

I personally have my entire mobile library in mp4 format and can fit MORE on an external drive for travel. I use Sorenson Squeeze to encode all my videos and it LOOKS GREAT!! It took some time to figure out the optimum settings but worth it!

And yes you can backspin and scratch videos in this format... maybe not as well in some configurations with VDJ but serato handles this format flawlessly.


Not saying go out and buy serato... just saying in reference to the video codec that is actually does work great. Hopefully soon VDJ will have some improvements to make it work better as far as backspinning, etc.
 
Strange, I have never had problems backspinning MP4s nor VOBs, and I am using a 5 year old P4 laptop.
However, I do agree with Bagpuss ans Andrew that VOBs are generally inferior to MP4s as far as quality and size, but VOBs are generally a bit easier to process due to a simpler compression algorithm and use of more keyframes, which greatly simplifies the processing and memory needed for backspinning.
 
well i have tried many converting softwares.. overtime SuperSetup, DVD Decrypter, Sony Vegas and a few more in my time... and having over 20,000 videos.... I am not going to suggest which format is the best or which format you should use..

I was introduced to Magic converter by Tayla quite a few months ago and have converted to many a formats. MPEG2.. VOB.. DVD..mp4.. 3gp... and must say that the quality.. playback... response in VDJ... Iphones..Black Berry.. and PCs are remarkable.. not hitches... etc.

Anyone needing a good converter... I recommend Magic Converter without hesitation.
It is also very simple to use.. and also does batch conversion
 
Andrew87 wrote :
VOB (MPEG2) is a compressed format and inferior to H.264, bagpuss is 100% right on this. The math (horizontal pixels x vertical pixels x framerate x 24 bit colour (16.7m)):

720 x 480 x 29.97 x 24 = 248,583,168 bits per second

If your music video is 4 minutes long (x 240), the video portion will be 59,659,960,320 bits. To convert into megabytes we divide by 8,388,608 (8 * 1,024 x 1,024). An uncompressed music video should be about 7GB!

VOB uses MPEG2 as it's video compressor and the format does not compress as well as H.264.



so with the video being close to only 200 - 300 mg on a standerd DvD as a vob file, Why? would you make it bigger when if you rip the DvD uncompressed to your hdd it is only 200 - 300mg per vob file???
 
When your ripping software says uncompressed it actually means no recompression/transcoding, i.e. the rip you create is the exact same quality as what is on the disc. However, the original contents on the disc are compressed - not even a 50GB dual-layered Blu-Ray disc could store an uncompressed movie at DVD quality. VOB/MPEG2 is a lossy format, but as long as you make a bit-for-bit copy (which is what the 'uncompressed' ripping process is) you incur no further quality loss - it's exactly the same concept as downloading an M4A/AAC track from the iTunes store.

The reason I used the maths part above was to demonstrate that VOB/MPEG2 is a compressed format - many users believe that it is the video counterpart to WAV but it is not. Therefore if you convert any video from any format to VOB/MPEG2 you will create a file of worse quality than your original. If the original file was an MP4 (H.264/AAC) like the original poster, then you've likely created a file with a larger filesize which will be of worse quality. I'm not saying not to do it, some peoples computers simply cannot mix video with high complexity formats such as MP4 - but it's best to be aware of this issue and always keep your original files.
 
ok i think we are both talking about too diffirent tihings here...

your on about changing from say avi - vob/mpg?

for me i talking about ripping straight from DvD...

i know so many kats that are ripping from DvD and saving it bigger then the original.......Why? is what i'm asking.......


i do undestand what your meaning by convertting to a dif format and the risk in doing so... i also have done this in the past.... and have paid the price for it........

but these days i have record companies sending me there promo vids on DvD and find that the vob file ripp works best for me....
 
Yeah looks like we meant different things. Most of the ripping utilities are intelligent enough to create an exact copy of the data that's on the disc with no increase in size but a lot of the material on these DVDs aren't club friendly which may result in editting. I don't know of anyone who saves the files bigger than the original, I can't think of any reason for doing that, unless it's been editted, e.g. adding an intro/outro, removing skits etc. Because VOB/MPEG2 is a lossy format, it makes sense to save editted videos at the highest bitrate DVD allows and which you have space for - most utilities offer 8000 kbps as an option but you can in fact go higher.
 
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