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View Full Version : Need advice to fit HDTV film to DVD-5


Livesms
7th June 2007, 10:21
I've got Gladiator(2001) FullHD ts video. 1920*1080 with 2 audio streams (rus and eng). 21GB is rather big size to store it in to my HDD. I would like to reencode it using MPEG4-AVC (x264) to fit to DVD-5 media.
I would like to save both audio tracks.
I tried to reencode it without resize (1920*1080) saving both audio tracks (Rus 384kbit AC3, Eng 448kbit AC3).
I've got not so bad picture (IMHO)

http://img146.imagevenue.com/loc1037/th_07734_01_122_1037lo.jpg (http://img146.imagevenue.com/img.php?image=07734_01_122_1037lo.jpg)http://img7.imagevenue.com/loc884/th_07740_02_122_884lo.jpg (http://img7.imagevenue.com/img.php?image=07740_02_122_884lo.jpg)http://img21.imagevenue.com/loc880/th_07746_03_122_880lo.jpg (http://img21.imagevenue.com/img.php?image=07746_03_122_880lo.jpg)http://img19.imagevenue.com/loc722/th_07753_04_122_722lo.jpg (http://img19.imagevenue.com/img.php?image=07753_04_122_722lo.jpg)

But my P4 2.8Ghz (HT) is unable to play this video (1980*1080p X264 + AC3 audio) - there is 100% CPU Load and video lags.
So i think I need to resize (downsize) video and to encode it one's more.
Resize to 1280*720p (from 1920*1080) looks rather senseless.
32" LCD has 1366*768 - but i can't resize 1920*1080 because of mod4 restrictions for YV12()

What is the right way to keep both audio (rus and eng) and reencode 1920*1080p video with x264 to fit DVD-5.
May be I sould reencode audio from AC3 to AAC (384->192 and 448->256) to free some space for video? And what shall I do with resolution (resize)? 1920*1080p with x264 is too resource-intensive for my PC.

Atak_Snajpera
7th June 2007, 21:53
If I were you I would definitely resize to 1280x720. Simply more details plus faster decoding. Encoding 1080@~3mbps is completely pointless because all details which you have in source will be washed up after encoding! I also suggest to leave original sound tracks without transcoding. Regarding your native resolution I think your monitor is seen under windows as 1360x768 not 1366. I say that because friend of mine has 40'' LCD TV and the highest resolution is exactly 1360x768

Livesms
8th June 2007, 06:41
If I were you I would definitely resize to 1280x720. Simply more details plus faster decoding. Encoding 1080@~3mbps is completely pointless because all details which you have in source will be washed up after encoding! I also suggest to leave original sound tracks without transcoding. Regarding your native resolution I think your monitor is seen under windows as 1360x768 not 1366. I say that because friend of mine has 40'' LCD TV and the highest resolution is exactly 1360x768

As far as Google (http://66.102.9.104/search?q=cache:hTs_N5DrLBwJ:www.systemtrade.ru/subgroups/details/54.htm+32%22+768+resolution&hl=uk&ct=clnk&cd=4&client=opera) see :) 1366 x 768 is the resolution for 32" TV

And what about 1368*768 encoding at 3.5Mbps x264?
Encoding original AC3 Audio (384 + 448) to NeroAAC (256kbit) saves ~340mb. They say there is no difference beatween AC3 384-448kbit and AAC 224-256kbit.

Atak_Snajpera
8th June 2007, 13:29
Yes I agree! Your monitor may have 1366 horizontal pixels but windows uses only 1360! If you decide to convert audio tracks to AAC you will save 320 kbps. It's up to you. Honestly even 3.5mbps is rather low for 768p so it will be better to stay with standard HD resolution (720p).

twolfe18
13th June 2007, 23:25
well, first of all, have you tried to play x264 video at 3.5mb/s? that seems like a stretch on your p4 2.8ghz... not to mention how long it would take you to actually encode the entire movie (days?).

also, concerning transcoding your audio: even though aac @ 192kb/s may sound about the same as ac3 @ 384kb/s, this assumes that they are both encoded from a full quality initial source. when you transcode from ac3 to aac you loose quality. i would not recommend transcoding your audio, it is not worth it.

lastly, whether you decide to encode @ 1360x768 or 1280x720, you will notice little difference, but if i had a choice, i would go with 1360x768 because it is always nice to display video at its native resolution.