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I've been seeing ads for this. I was wonders how they do this. What codecs they use what bitrate and have it play on a regular dvd player.
What ads?
Of course you can put 25 movies on a regular DVD. If you don't mind sub-VHS quality...
Let's say an average movie is 90 minutes.
25 * 90 = 2250 min.
2250 * 60 = 135000 seconds
A writable DVD9 fits approx. 68000000 kbits.
Average bitrate would be
68000000 / 135000 = 504 kbits/s
Even if you use 352x288 MPEG-1 this gives bad quality. OK, you have 25 movies on a DVD, but they don't have DVD-quality.
Originally Posted by MrTroyLet's say an average movie is 90 minutes.
25 * 90 = 2250 min.
2250 * 60 = 135000 seconds
A writable DVD9 fits approx. 68000000 kbits.
Average bitrate would be
68000000 / 135000 = 504 kbits/s
Even if you use 352x288 MPEG-1 this gives bad quality. OK, you have 25 movies on a DVD, but they don't have DVD-quality.
And they don't have audio if u encode this way..
Originally Posted by CWR03What ads?
I think it was the scifi channel they where for 50 old scifi movies on two dvd's
these were in black and white mostly with mono audio. i never encoded anything like that i wonder what the quality would be for such low bitrate and resolution
Originally Posted by Boowi wonder what the quality would be for such low bitrate and resolution
Terrible imo.
There are very many different DVD-Players with MPEG4 ASP support - in this case you can use XviD for encoding and achieve much better quality. And there are some amount of DVD-Players with NeroDigital support - in this case you can use XviD + HE-AAC + MP4 container to save some bits @ audio and AVI container overhead
I actually have the 50 horror set advertised in the same commercial. There are five DVDs, not one, for a total of 10 sides. (Each side has five movies.) Using your figures, that gives 10*504kbits/sec or about 5Mbits/sec. I can’t remember what color-space DVDs are in, but even if it is in yuv420, b/w still uses two-thirds the bits as full color, and I believe some of the movies in the collection are in color. I wouldn’t be surprised if the audio was mono. Just remember that as far as quality goes, these movies were filmed 40-80 years ago on cheap film, and the analog artifacts are prominent.
well it's not impossible:
25 movies with average 100 min
8 500 000 ko for DVD9
8 500 000 * 8 / (25 * 100 * 60) = 453 Kbps
400 kbps for video
48 kbps for audio
With H264 and HE-AAC you can make that ...
Chuck Norris can do it better
400 kbps for video
48 kbps for audio
if it was a dvd18 (double sided dvd9) you could double those and have low vcd type quality(mpeg1 at quarter D1 is allowed by dvd specs) which should also play on all dvd players.
BUT since smallart said
I actually have the 50 horror set advertised in the same commercial. There are five DVDs, not one, for a total of 10 sides. (Each side has five movies.)
all these calculations are pointless. i am willing to bet that the ad Boow saw is actually more than 1 dvd aswell.
Originally Posted by modChuck Norris can do it better
LMFAO
Regards
cyph |
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Post at 2011-4-15 14:30
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