Very slow DIVX/XVID playback

[celtic_druid]

i dont know y the problem is high resolution xvid?

not ALL avi work bad only the high res ones

it makes a huge improvment to normal res avi's, but not high res avi.

Bit of a contradiction there. You don't think that high res matters, but then you have problems with high res files. Trust me a 720p file takes more CPU to decode than a 576p one, etc.

Decoding the audio also takes CPU and AC3 requires more than say mp3 I would imagine. Check out your CPU usage during playback. VLC is ok, but mplayer still uses less resources.

VLC still uses decoders, but as you said built in ones. From recollection it uses the same decoder as AC3Filter, ffdshow, etc. and it still requires CPU.

[varun1]

u r right about the high res problem, but then why does the video play perfectly n i mean PERFECTLY when i disable the audio in vlc. n it wont work like that in any other program.
also i dont understand, there are other people that can veiw high res xvids with almost the same amount proccessor speed n there pcs are celleron, yet i have amd, arent supposed to be a tad faster then there listed?
also a long time ago like 3 reformats before i could run high res xvids, like .avis n .ogm this just happend one day that i couldnt run them properly anymore, but then a while later i gave n reformated my pc, n it didnt help??? isnt that weird. i cant exactly tell u for sure that the ones that played a long time ago were high res xvids, but they are by the same release group that i cant properly veiw today

[celtic_druid]

Well as I said decoding audio isn't free. It requires CPU power to, so no audio means more CPU for the video.

Maybe the files that used to work didn't use bframes and these do? If your CPU isn't maxed out during playback, then it is something else. If the CPU is maxed out, then I would say that is it. The other thing is that your CPU wouldn't have SSE, SSE2, etc. There is a fair bit of assembly involved in libavcodec, etc. Maybe try: http://ffdshow.faireal.net/mirror/mp...02.15.tbird.7z

[varun1]

i cant install the aplication, it just opens up a little dos window, n the illegal opperation error comes up n forces me to close it. both the apllication files i couldnt install. Im just gonna install mplayer through google, just let me know if i have to get the other file u put in there too, cuase for now ill just get mplayer, bbut if mdecoder is necessary then let me know, n also let me know if I i have to get a specific one, cause i alway get the wrong ****.

[varun1]

man is linyx a special type of operationg system??? cause i have windows 98SE, i hope its able to run on win98

[celtic_druid]

Well that was compiled for a AMD Athlon tbird. I figured it would run, but I guess your CPU doesn't have full mmx, etc. Also, I don't test builds other than the AMD 64 ones so it is possible that there is a problem and no one downloads my tbird builds, so no one noticed to report it.

You could try a build with cpu runtime detection. It should work but would be slower.

I wouldn't really call Linux "special", but yes it is an operating system. Unlike windows it is free though. Bit of a learning curve coming from windows to linux but I would have to say that it functions better with lower resources than windows.

[varun1]

i just tried lynix at the unversity computers, and i tell its a whole new thing, u cant use the same kebooad shortcut commands and may other things. it looks unique but i myself perfer windows, just cause im alot alot faster at it.

[daniel-ntl]

hi i need help on avi playback, the avi file always choppy playback on my old computer via cyrix III (via c3)cpu clock 700Mhz, RAM 256MB,OS Windows ME, the file is high bitrate XVID 899Kbps, 25fps,resolution 720*576,the sound is mp3 192Kbps.I use ffdshow from all version from the old ones to the newest, and the player is MPC from winME(it's the fastest),i try xvid decoder it still choppy,i try vlc-gom player-allplay-divxplayer-everything, but all other movie it's fine,it's because the high bitrate file,any suggestion what codec to solve this?or player with build-in codec?

[Chewy]

welcome to the forum

Codec : XviD
Codec/Family : MPEG-4
Codec/Info : XviD project
Codec settings/Packe : No
Codec settings/BVOP : Yes
Codec settings/QPel : No
Codec settings/GMC : 0
Codec settings/Matri : Default
PlayTime : 56mn 13s
Bit rate : 1590 Kbps
Width : 672 pixels
Height : 368 pixels
Aspect ratio : 16/9
Frame rate : 25.000 fps

I am running an athlon xp 3200(@ 2.2Ghz), better cpu core and 3 times faster, twice as much ram, which is probably a whole lat faster than yours, a radeon 7000 pci/64 megs and mpc w/ffdshow also

here's a cpu use graph, as you can see my avi is only 50% more bitrate than yours but with probably 4 times the horsepower of your setup I am still using 50% cpu

older computers don't work well with mpeg4

there's no way around it

[daniel-ntl]

welcome to the forum



I am running an athlon xp 3200(@ 2.2Ghz), better cpu core and 3 times faster, twice as much ram, which is probably a whole lat faster than yours, a radeon 7000 pci/64 megs and mpc w/ffdshow also

here's a cpu use graph, as you can see my avi is only 50% more bitrate than yours but with probably 4 times the horsepower of your setup I am still using 50% cpu

older computers don't work well with mpeg4

there's no way around it

well your computer is great, but i want my old comp to play nice high bitrate,which codec should i use? or player with build in codec?

[Chewy]

which codec should i use? or player with build in codec?

as far as I know you are using the best one already

more ram might help, a clean install and optimizing your computer might help

burning the avi to cd and playing on a divx capable standalone would be your best option

[daniel-ntl]

thank you for the advice, but could anybody help me to compile ffdshow build on via cyrix III(via c3)?or anyone could upload the fastest fersion of ffdshow(lite)?

[locoeng]

I think it is time for a new PC if these are the things you are wanting to do.

[daniel-ntl]

finally to those of you who want to watch high bitrate xvid/divx up to 1000Kbps and not getting slow or choppy,on old computer such as Pentium3,via cyrix III(via c3),AMD k6(without graphic card,just on board graphic card), I got the solution by tial and error:
1.minimum requirements are:memory 128Mb or higher, CPU clock 700Mhz or higher. OS windows98 or windowsME.
2.No running program on the background (such as antivirus or else)
3.Windows media player classic (MPC) original from your OS,you could find it in program files>windows media player>mplayer2.exe
4.install ffdshow-20050822MSVC71.exe(the most lite and stable for old PC)
5.the avi files resolution width must NOT exceed 688 if it's 720 then you must resize the avi file.
6.if the sound from avi is mp3 don't use from ffdshow. you should use the one from windows98 or windowsME MPC (go to ffdshow audio configuration and disable the mp3 codec)
7.if the sound from avi is ac3 just enable it from ffdshow audio configuration.(if there is an error in the ff_liba52.dll, you should use the ff_liba52.dll from ffdshow-20051103.exe) just install it then copy the dll,paste outside ffdshow folder,uninstall ffdshow,install ffdshow-20050822MSVC71.exe and replace the dll. don't use ac3 filter because it's not lite(use much cpu,make the sound slower than picture-out of sync).
here're the specs of my computer:
on board PCchip m755mlr,CPU via cyrix III(via c3) 700Mhz,
ram 256Mb share,can play high bitrate up to 1000Kbps xvid/divx but the resolution width under 688.