Resize DVD to HDTV (newbie question) 1080, resolution, something, question

andy

if i want to resize my 720x480 DVD to 1920x1080 HD-Resolution, is this possible with AVC Encoder ?

how about the quality ? (if i watch it in monitor with resolution larger than 1080)
any recommendation for application and encoder ? (i'm using nero recode but wanna try something new )

also any tips for the best setting to resize that big ?

Thanks!

why you would resize 720 to 1920 ???????

that is stupid, the quality is the same , you can not do beter than the original video


Originally Posted by carlo_0000why you would resize 720 to 1920 ???????

that is stupid, the quality is the same , you can not do beter than the original video

Actually with AVISynth filter like LimitedSharped() and PixieDust() you CAN do better than the original video. Not to mention that a movie encoded at 1920x1080 played back on a screen of that size will look much better than the same video at 640x480 on the same screen. The 640x480 video will have artifacts blown up massively on screen, and will look worse even at the same bitrate.

why you would resize 720 to 1920 ???????

actually i'm just curious about the result

that is stupid, the quality is the same , you can not do beter than the original video

thats why i'm asking about the quality.. heheheh

Actually with AVISynth filter like LimitedSharped() and PixieDust() you CAN do better than the original video. Not to mention that a movie encoded at 1920x1080 played back on a screen of that size will look much better than the same video at 640x480 on the same screen. The 640x480 video will have artifacts blown up massively on screen, and will look worse even at the same bitrate.

emm.. is AVISynth applied while encoding or decoding (playback) ? which encoder support AVISynth ?

Thanks!

apart from the quality issues you will also need a very fast cpu for being able to play the stream in realtime

btw its 1920x1088, not 1920x1080


Originally Posted by Oline 61Actually with AVISynth filter like LimitedSharped() and PixieDust() you CAN do better than the original video. Not to mention that a movie encoded at 1920x1080 played back on a screen of that size will look much better than the same video at 640x480 on the same screen. The 640x480 video will have artifacts blown up massively on screen, and will look worse even at the same bitrate.

you can filter out some defects or rise some sharpness, but if a movie is already good you cant get better results.
also rising the resolution means you will need more bitrate, and if you apply the same bitrate to the standard resolution you will not get artifacts... so what you said is all wrong.

Not to mention the enourmous encoding time it would take. Not worth it I would say.

1) It's better to use PAL 720*576 for make that.
2) 720*576@1920*1088 is perhaps too high upscaling (X6). IMO it will be better to make 720*576@1280*720 upscaling (X2.5).
3) IMO 720*576@1280*720 reencoding with high interpolation quality and sharpening filter done better result for eyes than 720*576@1280*720 hardware upscaling

Not to mention the enourmous encoding time it would take. Not worth it I would say.

with Xvid default settings, it encodes at ~0.xx fps with a 1..4 ghz CPU......well x264.... predicted to be even slower


Originally Posted by Sagittaire1) It's better to use PAL 720*576 for make that.
2) 720*576@1920*1088 is perhaps too high upscaling (X6). IMO it will be better to make 720*576@1280*720 upscaling (X2.5).
3) IMO 720*576@1280*720 reencoding with high interpolation quality and sharpening filter done better result for eyes than 720*576@1280*720 hardware upscaling

Sharpening and high quality interpolation will be useless if you dont rise the bitrate.
at that point i prefer using a custom matrix (that gives more details than standard quantization) and sharpening at standard resolution with the same quot;highquot; bitrate.
also if you want high quality interpolation you can do it during playback using media player classic (hardware resize thru PS2.0) or even using lanczos with ffdshow...


Originally Posted by Sharktoothyou can filter out some defects or rise some sharpness, but if a movie is already good you cant get better results.
also rising the resolution means you will need more bitrate, and if you apply the same bitrate to the standard resolution you will not get artifacts... so what you said is all wrong.

Thats just not true. Right now I am encoding a movie at 640x480 at 2204 kbit/s (1/2 DVD5 backup). The 640x480 version must be blown up to 1280x960 to fit my screen, so any small artifacts are drastically increased in size, and look much worse.
However, if I resize to 1280x960, then encode the artifacts remain very small at 2204 kbit/s and the video looks much better on playback. It is not nessecary to increase the bitrate because of the effeciency of x264. For example the high resolution trailers posted in this forum (For Superman amp; X3 IIRC) demonstrate the ability of AVC to encode high quality high res video @ 1600 kbit/s. So of course a lower res (1280x960) and higher bitrate (2204) should be very high quality, no?
About increasing quality, using PixieDustpp(limit=3) along with LimitedSharpen() with an output res of 1280x960, the output uncompressed looks better than the 640x480 on my screen. Drawn your own conclusions, but for my particular screen, for this particular backup target size, I can achieve much greater results.

Not to mention the enourmous encoding time it would take. Not worth it I would say.

heheheh, i started it yesterday and maybe it will finish tomorrow afternoon.

also rising the resolution means you will need more bitrate

yes, for experiment i'm using 5000 kbps. it should be enough right ??

Thanks everyone!


Originally Posted by Oline 61Thats just not true. Right now I am encoding a movie at 640x480 at 2204 kbit/s (1/2 DVD5 backup). The 640x480 version must be blown up to 1280x960 to fit my screen, so any small artifacts are drastically increased in size, and look much worse.
However, if I resize to 1280x960, then encode the artifacts remain very small at 2204 kbit/s and the video looks much better on playback. It is not nessecary to increase the bitrate because of the effeciency of x264. For example the high resolution trailers posted in this forum (For Superman amp; X3 IIRC) demonstrate the ability of AVC to encode high quality high res video @ 1600 kbit/s. So of course a lower res (1280x960) and higher bitrate (2204) should be very high quality, no?
About increasing quality, using PixieDustpp(limit=3) along with LimitedSharpen() with an output res of 1280x960, the output uncompressed looks better than the 640x480 on my screen. Drawn your own conclusions, but for my particular screen, for this particular backup target size, I can achieve much greater results.

i do not agree. a good encode will show no artifacts, so upscaling wont do any good.
however i admit it can produce more pleasing results for low bitrate encodings.

Originally Posted by ilsalso rising the resolution means you will need more bitrate

yes, for experiment i'm using 5000 kbps. it should be enough right ??

Thanks everyone!

5000 is generally an overkill, it depends on the source though.