Recently I converted four .mp4 files(that were originally a BDrip H264 5.1ch) into DVD using ConvertxtoDVD. These four .mp4 file are pity similar in their sizes, stating 1280x544 (i mean, when you place your cursor at it, it show) and its around 2-2.1gb, each movie is about 2hr long. However, the result is that two of the Video_TS folder is 4.1-4.2gb while the other two is only around 2.5 - 2.7gb. What would be the possible cause of the differences? I did not change any setting in the ConvertxtoDVD when converting these four files.
Also, when we convert a .mp4 file that states 1280x544 into a PAL video, does it actually reduce the video quanlity? considering that PAL's max resolution is only 720 width...
Thanks for any advise...
Try StreamFab Downloader and download from Netflix, Amazon, Youtube! Or Try DVDFab and copy Blu-rays! or rip iTunes movies!
+ Reply to Thread
Results 1 to 3 of 3
Thread
-
-
I think you're dealing with two separate issues here - bitrate and resolution.
It would seem you are actually using different bitrates on the mp4 files when converting to dvd. If they are both the same length then using the same bitrate will get you the same size in the end. The only difference being if one has dts sound versus ac3 sound (dts being large than ac3 all things being equal) OR you have motion menus on one of them. Motion menus or other bells and whistles on a dvd will take up more space. - also you did not mention if one of the mp4 files have multiple audio tracks, that will also take up more space - though if they are commentary tracks rather than full digital surround tracks they usually have negligible impact as far as space is concerned - ie not as large.
As far as the quality yes there is reduction when going from a high def bluray (I'm assuming bluray since you said bdrip) to a standard definition. You are reducing the resolution to fit a lower quality standard. Standard dvd (pal or ntsc for that matter) is less quality than a "good" properly sourced true bluray movie (there are of course can be bluray movies that don't look as good as a dvd if the master source wasn't good or if it was a homemade job from questionable or manually upconverted sources.Donatello - The Shredder? Michelangelo - Maybe all that hardware is for making coleslaw? -
However, the result is that two of the Video_TS folder is 4.1-4.2gb while the other two is only around 2.5 - 2.7gb. What would be the possible cause of the differences? I did not change any setting in the ConvertxtoDVD when converting these four files.
It would seem you are actually using different bitrates on the mp4 files when converting to dvd. If they are both the same length then using the same bitrate will get you the same size in the end.
To the OP, seeing as you have a high quality source try the free AVStoDVD (lock in HCenc 2 pass encoding). It should provide a better result.
Similar Threads
-
DVD to MP4 conversion playback not quite smooth.
By scottb721 in forum Video ConversionReplies: 1Last Post: 21st Jun 2010, 09:45 -
ini file conversion to mp4
By pacific77 in forum Newbie / General discussionsReplies: 3Last Post: 29th Apr 2010, 14:02 -
MKV (h.264 file) conversion to AVI or MP4
By killwill169 in forum MacReplies: 43Last Post: 12th Aug 2009, 18:35 -
Conversion from VOB-File into a MP4 File stopps after 9 minutes...
By Fly Eagle in forum ffmpegX general discussionReplies: 2Last Post: 6th Aug 2009, 11:41 -
MP4 conversion to mpeg for DVD authoring
By npereira in forum Video ConversionReplies: 8Last Post: 2nd Jun 2009, 04:20