meri.akvarist.ee

Olen katsetamas veebikaamerat reaalajas video edastamiseks. Parim aeg vaatamiseks on 11.00-19.00, siis on akvaariumil tuled peal, alguses ainult sinine, alates 13.00 täisvalgus. Muul ajal, eriti kui väljas on pime, suurt midagi näha pole, kuigi ülekanne toimub.

Kahjuks on sidekanali ribalaius piiratud (128 Kbps), nii et kvaliteetset pilti on raske edastada, eriti kui vaatajaid on mitu, aga midagi ikka näeb. Kui on huvi, siis testiks kasutatav link on http://hepatus.mine.nu/aquarium/et/v_wme.htm

Kui masin ei tööta, või on probleeme Internetiga (Starman!), siis peaksid saama vastava ingliskeelse teate domeeni haldajalt (tegemist on dünaamilise IP-ga).

Kui sa ei saa alljärgnevatest tehnilistest nüanssidest mõhkugi aru, ära lase end nendest häirida, vaid proovi julgesti. Kui veab, siis näed!

Praegu katsetan Windows Media Encoder varianti, mis eeldab, et sul on oma masinas Windows Media Player-i (WMP) vähemalt versioon 7.1 tugi olemas (soovitatav v. 9). Selleks toeks võib olla vastav ActiveX object (CLSID:22d6f312-b0f6-11d0-94ab-0080c74c7e95), kui kasutad Internet Explorerit ja opratsioonsüsteemiks on Windows. Kõigil teistel juhtudel on vajalik WMP plugin (MIME: application/x-mplayer2).

Maksimaalse võimaliku kvaliteediga pilt vajab 86 Kbps ribalaiust, vähema puhul häälestab ennast automaatselt ümber madalama peale, millega kaasneb kvaliteedi langus ja väiksem pilt. Viimane väljendub ekraanil selles, et pildi vaateväli väheneb nagu oleks zoomitud, kuigi pildi suurus ekraanil ei muutu. Seega maksimaalse kvaliteediga pilti näeb tõenäoliselt ainult ühe kasutaja puhul. Maksimaalne samaaegselt teenindavate klientide arv on viis, selle arvu ületamisel näete korraks all teksti 'Connecting' ja siis 'Ready' ning pilt jääb mustaks.

Seal olevaid eelnevalt salvestatud videoklippe õnnestub tõenäoliselt näha ainult WMP abil.

Vastan meeleldi kõigile küsimustele!

Lisaks eelpooltoodule teatab Microsoft:

Content encoded with the Windows Media Audio and Video 9 Series codecs (except for the Windows Media Audio 9 codec) is not supported in Windows Media Player version 6.4. Content encoded with the codecs can be played in Windows Media Player version 7.1 and Windows Media Player for Windows XP; however, the codecs must be downloaded before the content can be played.

Video 9 Series koodek on just see, mida antud juhul kasutatakse!

Ja veel
Windows Media Video 9 codec format change
The format of content encoded with the Windows Media Video 9 codec has changed since the release of the Windows Media 9 Series beta. This change will cause some content to be unreadable by some players. The effects of this change are:
Content created with the beta version of the Windows Media Video 9 codec will decode properly using Windows Media Player or applications built with the Windows Media Format SDK.
Content created with any version of the Windows Media Video 9 codec will decode properly using the latest Windows Media Player or applications built with the latest Windows Media Format SDK. This content can also be decoded by older applications if they download the Windows Media Video 9 decoder after October 31, 2002.
To decode content created with the latest version of the Windows Media Video 9 codec, users of Windows Media Player 7.0, 7.1, or Windows Media Player for Windows XP should take the following steps to force the player to download the latest decoder:
1. Start Microsoft Internet Explorer.
2. On the Tools menu, click Internet Options.
3. On the General tab, click Settings, and then click View Objects.
4. Delete the object named {33564D57-9980-0010-8000-00AA00389B71}.
5. On the Start menu, click Run.
6. Type the following command:
rundll32 advpack.dll,LaunchINFSection c:\windows\inf\wmv9dmo.inf,Uninstall

The next time a file containing Windows Media Video 9 content is loaded into Windows Media Player (or a player that implements codec downloading), the latest version of the decoder will be installed. Users of the beta version of Windows Media Player 9 Series must upgrade to a later release to play content encoded with the new Windows Media Video 9 codec.

Couple of words in English...
There is a webcam installed nearby my tank, so you can see in live what's going on. Unfortunately the bandwidth is limited to 128 kbps, so the quality wouldn't be the best. The webcam page is http://hepatus.mine.nu/aquarium/en/v_wme.htm

Live video is transmitted by Windows Media Encoder 9 Series, which means you need Windows Media Player (WMP) (at least V7.1, V9 recommended) support. This support could be the ActiveX object(CLSID:22d6f312-b0f6-11d0-94ab-0080c74c7e95) if you are using Internet Explorer on Windows platform. In any other cases a WMP plugin (MIME: application/x-mplayer2) is required for your browser.