Search found 18 matches

by scyrax
Tue Jul 25, 2006 6:36 pm
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

If this would run into trouble,please just ignore what I said above,sorry.
by scyrax
Tue Jul 25, 2006 4:04 pm
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

UMD sdk leaked,we should be able to encode MPS & PMF.I think it also Might be helpful for PMPmod AVC using larger resolution.
by scyrax
Wed Jul 19, 2006 9:58 pm
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

@jonny

Any progress on how to make 720x480 AVC working?
by scyrax
Tue Jun 20, 2006 12:49 am
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

Yeah,audio was perfect now~ Excellent work jonny :)
by scyrax
Mon Jun 19, 2006 9:32 am
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

Actually 120mhz was enough for performance for I`ve tested a 480x272 30fps clip with very complex scene at quantizer=10 and peak bitrate reaches to 17000kbps without stuttering. but there is another problem with audio:It seem that it usually accompanied by some random noise,similar to a very very sh...
by scyrax
Wed Jun 14, 2006 1:15 am
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

According to the offical Authoring Introduction, the existing Resolution/info available for UMD: Video Codec H.264/AVC Main Profile Level3 progressive Picture size: 720x480, 352x480, 352x240 interlaced Picture size: 720x480, 352x480 progressive Frame Rate: 23.976Hz, 29.97Hz interlaced Frame Rate: 29...
by scyrax
Tue Jun 13, 2006 7:17 pm
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

what about MPS??which decoding library does it use?
by scyrax
Mon Jun 12, 2006 3:44 pm
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

jonny,is it possible to decode 4:2:2 AVC format???
then we were away from the chroma problem.
by scyrax
Mon Jun 12, 2006 12:16 am
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

@jonny
Is it possible to decode 720x480 avc in later build??( That would also help to increase chroma info :)
by scyrax
Sun Jun 11, 2006 11:51 pm
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

wow...that`sss definitely a revolution!

ps:does this awesome PMP Mod AVC upsampling chroma info???(offical player does not...)
by scyrax
Sat Jun 03, 2006 4:03 pm
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

ok, welcome to the stuttering club :) it's a normal behavior of the app. happen when the psp is not able to decode audio/video in realtime. (the current resolution limit, to have smooth playback, is something slightly more than 480x272, so you must reencode the clip using a lower resolution) i'll g...
by scyrax
Mon May 29, 2006 10:28 am
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

making the OSD transparent may noticably downgrade performance....but I think the bookmark feature really could be a useful one without affecting performance.
by scyrax
Thu Feb 09, 2006 11:02 pm
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

I had a questions jonny.
The interleaved AVframe would definitely be faster for using mechanical HardDisk,but I doubt if there were any help for using electronic Memory Stick??
by scyrax
Wed Feb 08, 2006 1:42 am
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

your analysis is useful and bring a good point (!!!). 1.interpolate the Chroma info in software modes. i'll do this in the future, but with the gu (this is implicitly covered by an optimization i've planned - move the csc to the gu) not in the next version, but probably in the next-next :) Wow,can`...
by scyrax
Wed Feb 08, 2006 1:26 am
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

after "googled" the color step problem I think I`ve got the idea~~ xvid using YV12 formats,which means Chroma were store in half resolution than luma. To display on a Progressive RGB device(CRT,LCD etc...) needs YV12-->RGB convertion. on PC,the convertion were done by videocards when using...
by scyrax
Tue Feb 07, 2006 9:42 pm
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

@kaveman I have a single frame from Madagascar trailer without PS(which captured from mpc`s saveimage option ) to show these artifacts~~ ,watch the red edge! http://xs.to/xs.php?h=xs67&d=06062&f=blocky.png I`ve just tried that :'chroma_opt' or simply increasing bitrates were no help to elimi...
by scyrax
Tue Feb 07, 2006 7:53 pm
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

in part, the cause could be the psp lcd you have also to take into account that on psp there is no postprocessing (i'm sure on pc you have deblocking/deringing activated) emm,it seems to be related to the postprocessing. UMD video suffers no kinds of this blocky because its original resolution was ...
by scyrax
Tue Feb 07, 2006 11:56 am
Forum: PSP Development
Topic: PMP Mod v2.02 & PMP Mod AVC v1.02
Replies: 1856
Views: 8854191

@jonny I`ve had an interesting finding,as we all known audio stutters when playing heavy scene especially at high bitrates or high framerates. but if you pause playing as soon as it began to stutter,and then resume,you will find it stutters no more~~ and stutter only recurs in several seconds if hea...