trustfm Δημοσ. 9 Μαΐου 2002 Δημοσ. 9 Μαΐου 2002 Meta apo polu psa3imo alla kai dokimes 8a sas dei3w mia me8odo ka8ara dikia mou opou mporeitai na breite to max bitate sthn max analush me thn max poiothta . To kurio problhma einai oti nai men mporoume me diafora programata na metrhsoume to bitrate ths tainias mas alla den mas lene ti kadro-analush (meta apo cropping) na epilexoume . Ayto to katafernei to gordian gnot sto doom9 alla den mas leei pws . Omws psaxnontas brika thn idea ths me8odologias . Etsi sas thn parousiazw me KA8E EPIFULA3H . Gia na broume to bitrate kanoume : Bitrate(Divx3)=8192*MB/time(sec) Bitrate(Divx5)=8388,608*MB/time(sec) Opou Mb einai poso 8eloume na bgei h tainia . (XWRIS TON HXO). Etsi mporoume ex arxhs na gnwrizoume to bitrate gia ton apaitoumeno xwro pou dia8etoume (1-2-3 cds) Ws edw ola kala. Twra omws 8a broume thn me8odo na AXIOPOIHSOUME AYTO TO BITRATE me ton megisto dunato tropo! Poio kadro/analush 8a epilexoume ? 3ekiname me tis dunates NON CROPPED ANALUSEIS 4:3 . Oi analuseis opws xeroume prepei na einai pollalasio tou 16 etsi exoume : 400*300 = 120000 = RESOLUTION 408*306 416*312 424*318 432*324 . . . 632*474 640*480 = 307200 = RESOLUTION . . . 704*528 712*534 720*540 Ena mono apo ayta ta kadra 8a mas dwsei to kalutero apotelesma ! Pws 8a to broume ? Gia na to broume ayto kanoume to exhs . Pernoume ena kadro opoio na nai px to 640*480 kai kanoume croping . etsi to para8uro apo 640*480 ginetai 624*308 (px). Orizoume ton logo P=Resolution full/Resolution cropped. Sto paradeigma mas bgainei P=1,5984. Ypo8etoume oti o logos P einai ametablhtos gia ta diafora para8ura . Twra h IDANIKH CROPPED RESOLUTION DINETAI APO TON TUPO : RES(cropped)=1000*bitrate/FPS*0,27 (an exoume 2cds tainia) RES(cropped)=1000*bitrate/FPS*0,2 (an exoume 1cd tainia) Opote gnwrizoume thn RES CROPPED . Alla 3eroume kai ton oro P. Opote kanoume : P*RES CROPPED kai briskoume to RES FULL ! (sto peripou). To res full einai to IDANIKO KARDO to opoio an ginei cropped sthn sunexeia 8a mas 8wsei thn max apodosh ! Pisteuw pws etsi douleuei to guardian gnot ! Dokimaste kai peste mou . Elpizw na katalabate ! <img border="0" title="" alt="[big Grin]" src="images/icons/grin.gif" />
philippas Δημοσ. 9 Μαΐου 2002 Δημοσ. 9 Μαΐου 2002 Kiomos de douleuei etsi. H methodos pou perigrafeis sou dinei mia endiksi se poia Resoloution na kaneis to Compressibility test sto GordianKnot. Oso pio konta peseis stin resolution toso pio sosto tha einai to compressibility test. Pos douleuei ------------ Ftiaxneis to avs script me to GKnot kai p.x epilegeis 10% Compressibility test, diladi ti n entoli=>SelectRangeEvery(130,13). Simpiezis tin tainia me stathero quant=2 kai perneis to megethos tou avi arxeiou. Gia paradeigma to megetos tou arxeiou vgike 150mb opote theoritika to megethos ollis tis tainias an simpiesti me stathero quant=2 tha einai 150*10=1500mb, pou antoistoixei se quality=100% (epidi epileksame 10% comp test). Opote an theloume na dosoume sto video 600mb to quality sto Gordian Knot tha einai 600/1500 = 0.4 diladi 40% Tora i mpara tou Gnot pos douleuei: ---------------------------------- Gia paradeigma ekanes to Comp Test se 640x480 resolution kai to quality vgike 50% kai gia to video afieroneis 600mb. An metakiniseis tin mpara sto 320x240 to quality tha ginei: (640*480)/(320*240)*0.5 =2 => 200% Opote auksaneis to resolution mexri to quality na ftasei konta sto 100%. Fisika merikes fores den mporeis na ftaseis to 100% se ikanopioitiki resoloution opote prepei na thisiaseis ligo tin piotita tou video. Genika ego den peigeno kato apo 400 x XXX resolution kai kato apo 60% Quality. O genikos tipos pou xrisimopoiei to Gnot einai: (Megali resolution)/(Mikri Resolution) * quality tou compTest O parapano tupos den einai 100% sostos giati theorei oti ta codec Xvid,divx5,divx3 kanoun scale grammika opos to asimpiesto avi. Stin pragmatikotita ooms gia kathe tainia ta codec kanoun diaforetiko scale, tis perisoteres fores einai konta sto 1 diladi isxuei o parapano tupos. alles fores p.x mporei na kanei to codec scale me logo 0.7 diladi o tupos ginetai (Megali resolution)/(Mikri Resolution) * quality tou compTest *0.7 O tupos einai ligo poliplokos gia na vreis to scale tou kathe codec gia tin sigkekrimeni tainia opote xrisimopoieis ton Tupo tou GKnot kai prospatheis na mantepseis se poia resolution prepei na kaneis to compressibility test (oso pio konta peseis toso pio akrives tha einai to test). Ekei mpainoun ta bits/pixel pou sou dixnei to GordianKnot diladi 0.27=> 2cd kai 0.21=> 1cd. Meta otan kaneis to Comp Test agnoeis ta bits/pixel <small>[ 09-05-2002, 05:49: Το μήνυμα επεξεργάστηκε από: philippas ]</small>
trustfm Δημοσ. 9 Μαΐου 2002 Μέλος Δημοσ. 9 Μαΐου 2002 to diabasa to munhma sou 4 fores alla den katalaba pou exw la8os <img border="0" title="" alt="[big Grin]" src="images/icons/grin.gif" /> mporei kai na kanw la8os . pantws ton panw tupo ton brika sto doom9 . Twra prose3e na deis ... mporoume na to diapistwsoume polu eukolotera an o tipos autos einai swstos h oxi ! kaneis me gordian knot mia tainia kai meta prospa8hse na epalu8euseis thn resolution pou sou edwse o tupos (an einai ontws auth)! egw mexri stigmhs (ekane enas filos mou mia tainia me gnot) bgainei to idio ! gia des ligo ... Apo oti katalaba esu paizeis me thn analush gia na bgaleis ta telika mb . Egw apla exw fixed bitrate ara kai telika mb kai aplws 8elw na brw to katalhlo kadro . <small>[ 09-05-2002, 08:16: Το μήνυμα επεξεργάστηκε από: trustfm ]</small>
philippas Δημοσ. 9 Μαΐου 2002 Δημοσ. 9 Μαΐου 2002 An eitan sostos o tupos sou olles oi tainies tha sumpiezontan to idio. Giauto kaneis kai to comp Test sto GKnot, giati kathe tainia simpiezete diaforetika, opote gia kathe tainia exeis diaforetiko template(kadro opos les).
crAss Δημοσ. 9 Μαΐου 2002 Δημοσ. 9 Μαΐου 2002 Akrivos opos ta eipe o Filippas. Apla ego na prostheso pos pote den mporoume na xeroume apo prin to idaniko kadro. Giati mporei to 10 % pou kanoume na einai gemato arges skines kai skoura xromata i to antitheto. Auto pou xero ego apo empeiria einai oti opoiadipote tainia einai kodikopoiimeni me bitrate 2000 kai pano kai tautoxrona to kadro tis einai 576*x (x oti vganei gia na exoume sosti analogia kadrou) paizei teleia me ti xrisi ton direct show filters gia streching stin analisi pou theloume (1024x768 kai 1152 x 864 exo dokimasei) se mia cpu apo 1GHz kai pano... crAss
philippas Δημοσ. 9 Μαΐου 2002 Δημοσ. 9 Μαΐου 2002 Oxi to test einai poli diskolo na pesei ekso, eixa parei meros sto testing tis entolis SelectRangeEvery sto doom9.net kai nomizo to megisto lathos pou evgaze eitan 1%.
trustfm Δημοσ. 9 Μαΐου 2002 Μέλος Δημοσ. 9 Μαΐου 2002 filipe akou akou ... den exeis piasei ton sullogismo mou ! Fysika kai oles oi tainies den bgainoun to idio ALLA ! Ti kanei o tupos ... akou na sou pw ti exw katalabei : Se periptesh pou h tainia einai KORESMENH : dhl exei arges skhnes / mauro ktl 8A SOU BGEI UNDERSIZED sthn resolution pou 8a sou dwsei o tupos . Ma ayto DEN mas endiaferei ! H tainia auth einai etsi ti na kanoume twra ? na arxsoume ta tests me monadiko skopo na gemisoume to cd ? ANTI8ETA sto 99% twn periptwsewn o tupos EINAI SWSTOS kai epimenw ! Se tainies pou DEN einai koresmenes einai h swsth me8odologia eureshs kadrou (prosexe eureshs kadrou! oxi gemisma full twn cds) . An h tainia den einai koresmenh apla 8a sou gemisei kai ta cds ! Sthn ousia o tupos sou dinei ena akrotato megisto den paei na pei oti den mporei na sou bgei undersized . Alla oxi oversized ! 3anaskepsou to kai paidia elen3te ton tupo . epali8euetai 8a deite ! Diabasa ta compatibitity tests alla ti na kanoume twra na arxisoume na thn kwdikopoioume 100 fores thn tainia ? to 8ema einai na petuxoume sto peripou to teliko apotelesma me thn prwth ! Kante to exhs : me gnot kodikopoihste thn tainia grapste kapou to bitrate pou thn kanate kai deite an h resolution prossegistika einai auth . (xwris xrhsh compatibility test opws leei to guide sto doom9). Stis ousia o tupos isws na einai : RES(cropped)=1000*bitrate/FPS*0,27*suntelesths argothtas tainias (an exoume 2cds tainia) opou an h tainia einai kanonikh (oxi koresmenh) 8a exei suntelesth 1 . Emeis ton agnooumai gia ton aploustato logo oti pernoume thn XEIROTERH PERIPRWSH h opoia einai h tainia na exei polles skhnes ktl opote pernoume to megisto ths sunarthshs ! <small>[ 09-05-2002, 17:02: Το μήνυμα επεξεργάστηκε από: trustfm ]</small>
philippas Δημοσ. 10 Μαΐου 2002 Δημοσ. 10 Μαΐου 2002 Auto to 0,27 gia dio cd kai to 0,21 gia ena cd einai lathos kai apla opos ksanaeipa einai mia endiksi oste na epilekseis mia resolution gia na kaneis to Comp test, tipota allo. To GordianKnot simperilamvanei kai tin diarkeia tis tainias giautin tin endiksi! Afou meta kaneis to test agnoeis telios to 0,27 h 0,21. p.x To "Driven" eithele 0.7 bits/pixel!!! gia na vgalei 100% quality(an thimame kala)se 512x288 analisi me soft bicubic Resize. O monos tropos gia na min kaneis 2-pass einai na kaneis ena Comp Test kai na peseis akrivos sto 100% gia tin resolution pou thes. Opote tote den uparxei noima na kaneis 2-pass afou i tainia tha simpiestei me stathero quant=2. Diladi ena 1-pass quality mode me quant2(gia to divx5 kai analoga gia to xvid) ftanei. Gia undersized einai poli provlepsimo, an sou dosei to comp Test pano apo 100% tote i tainia tha vgei mikroteri apo oso perimenis kai prepei na auksiseis to resolution i na valeis ac3 eixo... ktl. To ollo thema tou 2-pass einai oti otan i tainia einai kato apo to 100% => den mporeis na ksereis me ena pass se pia meroi tis tainias na xrisimopioiseis quant 2, quant 3... giauto kai kaneis to 2-pass encoding. Opos eipa kai parapano xoris na simpiesis ena pososto tis tainias den mporeis na ksereis poso kala simpiezetai mia tainia. Elpizo na egina katanoitos. <small>[ 09-05-2002, 17:24: Το μήνυμα επεξεργάστηκε από: philippas ]</small>
trustfm Δημοσ. 10 Μαΐου 2002 Μέλος Δημοσ. 10 Μαΐου 2002 ma egw milaw gia 2pass encoding panta ! o tropos pou mou parousiazeis den exei kammia sxesh me to doom9 guide. sthn guide leei apla na baleis suntelesth 0,27 kai den anaferei pou8ena to test pou les ! ti diaolo tuflos eimai !!! <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" /> mono sto forum to grafei etsi den einai ? <small>[ 09-05-2002, 17:42: Το μήνυμα επεξεργάστηκε από: trustfm ]</small>
philippas Δημοσ. 10 Μαΐου 2002 Δημοσ. 10 Μαΐου 2002 Sto GKnot to graphei,ala ego to kano monos mou apla perno to script pou ftiaxnei to GKnot. Tora gia paradeigma ena compressibility test p.x vgazei quality 100% stin resolution 640x352 se 1300mb afieromena gia to video. Einai lipon asfales na kaneis olli tin tainia se quality mode 100%(quant=2) dioti to codec tha sou dosei tin megisti dinati piotita(denmporei na dosei parapano). To 2-pass se autin tin periptosi einai axristo. Opos eipa sto proigoumeno minima mou parapano, to 2-pass einai eksipnos tropos na epilegeis times gia ta quant(kai tis upolipes settings)an kai mono an to test vgazei ligotero apo 100%.
trustfm Δημοσ. 10 Μαΐου 2002 Μέλος Δημοσ. 10 Μαΐου 2002 ok katalaba alla as perioristoume sto exhs : estw oti enas to kanei opws to leei sto guide tou doom9 kai me 2 pass (asxeta an polles fores mporei na apodixtei axristo sto telos ),xwris to test, o tupos 8a isxusei ? egw exw endi3eis pws nai ! <small>[ 09-05-2002, 18:09: Το μήνυμα επεξεργάστηκε από: trustfm ]</small>
philippas Δημοσ. 10 Μαΐου 2002 Δημοσ. 10 Μαΐου 2002 To Compressibility test uparxei sto GKnot(sto readme) alla den uparxei sta guides tou doom9(uparxei sto forum omos). Ena paradeigma enos avs script gia mia tainia: </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> LoadPlugin("C:\DIVX\GORDIA~1\mpeg2dec.dll") mpeg2source("C:\DRIVEN\vts_02.d2v") crop(6,78,708,418) BicubicResize(512,288,0.333,0.333) SelectRangeEvery(130,13) </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">H teleutai entoli leei xorise to video se kommatia apo 130 frames(eikones) kai apo autes epelekse 13 frames diladi me alla logia simpiese to 10% tis tainias alla se tuxaia kommatia tis. Kai giauto sou dinei kathara mia endiksei pos simpiezetai mia tainia. <small>[ 09-05-2002, 18:15: Το μήνυμα επεξεργάστηκε από: philippas ]</small>
trustfm Δημοσ. 10 Μαΐου 2002 Μέλος Δημοσ. 10 Μαΐου 2002 ok alla auto den mas endiaferei ! mas endiaferei xwris to test kai me 2 pass encoding sto ntoukou (akoma kai me xmpeg !) , mporoume na poume oti o tupos mas dinei meses akres to swsto para8iro gia mia NON koresmenh tainia ? (to polu polu na bgei undersized an einai koresmenh) ! isxurizomai pws nai . <small>[ 09-05-2002, 18:19: Το μήνυμα επεξεργάστηκε από: trustfm ]</small>
philippas Δημοσ. 10 Μαΐου 2002 Δημοσ. 10 Μαΐου 2002 </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> ok katalaba alla as perioristoume sto exhs : estw oti enas to kanei opws to leei sto guide tou doom9 kai me 2 pass (asxeta an polles fores mporei na apodixtei axristo sto telos ),xwris to test, o tupos 8a isxusei ? egw exw endi3eis pws nai ! </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">O tupos den einai sostos apla sou dinei mia endiksei(ena meso oro) giati poli apla kathe tainia simpiezetai diaforetika. Diavase ligo ta parapano minimata kai tha katalaveis.
philippas Δημοσ. 10 Μαΐου 2002 Δημοσ. 10 Μαΐου 2002 </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> ok katalaba alla as perioristoume sto exhs : estw oti enas to kanei opws to leei sto guide tou doom9 kai me 2 pass (asxeta an polles fores mporei na apodixtei axristo sto telos ),xwris to test, o tupos 8a isxusei ? egw exw endi3eis pws nai ! </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">O tupos den einai sostos apla sou dinei mia endiksei(ena meso oro) giati poli apla kathe tainia simpiezetai diaforetika. Diavase ligo ta parapano minimata kai tha katalaveis.
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