{"id":555,"date":"2010-10-05T10:49:32","date_gmt":"2010-10-05T03:49:32","guid":{"rendered":"http:\/\/blog.iwayvietnam.com\/tuanta\/?p=555"},"modified":"2010-10-05T10:50:29","modified_gmt":"2010-10-05T03:50:29","slug":"dinh-dang-chuan-video-mo-webm","status":"publish","type":"post","link":"https:\/\/blog.iwayvietnam.com\/tuanta\/2010\/10\/dinh-dang-chuan-video-mo-webm\/","title":{"rendered":"\u0110\u1ecbnh d\u1ea1ng chu\u1ea9n video m\u1edf WebM"},"content":{"rendered":"

TTO – Hi\u1ec7n nay, \u0111\u1ec3 duy\u1ec7t video v\u00e0 n\u1ed9i dung \u0111a ph\u01b0\u01a1ng ti\u1ec7n tr\u00ean web n\u00f3i chung, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n d\u1ecbch v\u1ee5 v\u00e0 ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i ch\u1ee7 y\u1ebfu\u00a0d\u00f9ng n\u1ec1n t\u1ea3ng Flash. Tuy \u0111ang chi\u1ebfm l\u0129nh ph\u1ea7n l\u1edbn th\u1ecb ph\u1ea7n nh\u01b0ng c\u00f4ng ngh\u1ec7 n\u00e0y c\u1ed3ng k\u1ec1nh v\u00e0\u00a0tr\u1edf th\u00e0nh \u0111\u00edch ng\u1eafm c\u1ee7a tin t\u1eb7c khai th\u00e1c l\u1ed7i.<\/p>\n

C\u00e1c chu\u1ea9n web m\u1edbi ra \u0111\u1eddi l\u00e0 \u0111i\u1ec1u t\u1ea5t y\u1ebfu, trong \u0111\u00f3, VP8 v\u1edbi \u0111\u1ecbnh d\u1ea1ng WebM \u0111ang \u0111\u01b0\u1ee3c xem l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn thay th\u1ebf h\u00e0ng \u0111\u1ea7u ng\u00e0y nay khi \u0111\u1ea1i gia \u201cch\u1ed1ng l\u01b0ng\u201d ch\u00ednh l\u00e0 Google.<\/p>\n\n\n\n\n
\"\"<\/td>\n<\/tr>\n
Ph\u1ea7n th\u1eafng gi\u1eefa HTML5 v\u00e0 Flash v\u1eabn nghi\u00eang v\u1ec1 s\u1ea3n ph\u1ea9m c\u1ee7a Adobe, nh\u01b0ng VP8 v\u00e0 WebM s\u1ebd thay \u0111\u1ed5i c\u00e1n c\u00e2n n\u00e0y<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Trong v\u00f2ng 5 n\u0103m tr\u1edf l\u1ea1i \u0111\u00e2y, c\u00f9ng v\u1edbi s\u1ef1 l\u00ean ng\u00f4i c\u1ee7a c\u00e1c d\u1ecbch v\u1ee5 video tr\u1ef1c tuy\u1ebfn, n\u1ed5i b\u1eadt l\u00e0 Youtube, Flash tr\u1edf th\u00e0nh s\u1ef1 l\u1ef1a ch\u1ecdn s\u1ed1 m\u1ed9t v\u1edbi \u0111\u1ecbnh d\u1ea1ng\u00a0video nh\u1ecf g\u1ecdn FLV, c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng tr\u00ean h\u1ea7u h\u1ebft c\u00e1c m\u00f4i tr\u01b0\u1eddng h\u1ec7 th\u1ed1ng hay\u00a0thi\u1ebft b\u1ecb v\u1edbi \u0111i\u1ec1u ki\u1ec7n duy nh\u1ea5t l\u00e0 c\u00e0i \u0111\u1eb7t plug-in Flash Player ho\u00e0n to\u00e0n mi\u1ec5n ph\u00ed.<\/p>\n

Khi iPad ra \u0111\u1eddi, m\u1ed9t \u0111i\u1ec1u kh\u00e1 ng\u1ea1c nhi\u00ean l\u00e0 Apple kh\u00f4ng h\u1ec1 m\u1eb7n m\u00e0 v\u1edbi chuy\u1ec7n h\u1ed7 tr\u1ee3 Flash, do\u00a0\u0111\u00f3\u00a0kh\u00f4ng th\u1ec3 xem \u0111\u01b0\u1ee3c Youtube tr\u1ef1c ti\u1ebfp tr\u00ean tr\u00ecnh duy\u1ec7t. C\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh l\u00e0 Apple h\u01b0\u1edbng t\u1edbi chu\u1ea9n web\u00a0m\u1edbi HTML5, h\u1ee9a h\u1eb9n s\u1ebd ph\u1ed5 bi\u1ebfn trong nay mai. Ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng c\u00f2n g\u1eb7p tr\u1edf ng\u1ea1i v\u1edbi vi\u1ec7c c\u00f3 c\u00e0i Flash Player hay kh\u00f4ng. T\u1ea5t c\u1ea3 nh\u1eefng g\u00ec h\u1ecd c\u1ea7n bi\u1ebft l\u00e0\u00a0k\u1ebft n\u1ed1i\u00a0m\u1ea1ng, t\u00ecm c\u00e1c nh\u00e0 cung c\u1ea5p n\u1ed9i dung qua chu\u1ea9n HTML5 v\u00e0 duy\u1ec7t video.<\/p>\n\n\n\n\n
\"\"<\/td>\n<\/tr>\n
C\u00e1c t\u00f9y ch\u1ecdn s\u1eb5n s\u00e0ng tr\u00ean tr\u00ecnh duy\u1ec7t th\u1ebf h\u1ec7 m\u1edbi c\u00f9ng HTML5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

HTML5\u00a0\u0111\u1ea5u c\u00f9ng\u00a0Flash<\/p>\n

\u1ede th\u1eddi \u0111i\u1ec3m hi\u1ec7n t\u1ea1i, tr\u00ecnh duy\u1ec7t kh\u00f4ng c\u00e0i Adobe Flash Player b\u1ecb coi l\u00e0 “qu\u00e8 qu\u1eb7t”.<\/p>\n

X\u00e9t v\u1ec1 m\u1eb7t b\u1ea3n ch\u1ea5t, HTML5 kh\u00f4ng \u201c\u0111\u1ed1i kh\u00e1ng\u201d v\u1edbi Flash. HTML 5 l\u00e0 n\u1ec1n t\u1ea3ng, chu\u1ea9n m\u1edbi cho ph\u00e9p c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 mang n\u1ed9i dung, s\u1ea3n ph\u1ea9m c\u1ee7a m\u00ecnh t\u1edbi tay ng\u01b0\u1eddi d\u00f9ng m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i l\u1ec7 thu\u1ed9c v\u00e0o Flash hay c\u00e1c ph\u1ee5 ki\u1ec7n kh\u00e1c. S\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a th\u1ebb l\u1ec7nh <video>, c\u00f3 th\u1ec3 s\u1ebd l\u00e0 m\u1ed9t cu\u1ed9c c\u00e1ch m\u1ea1ng\u00a0cho c\u00e1c trang web b\u1ecb ch\u00ea l\u00e0 k\u00e9m ho\u1ea1t n\u0103ng, t\u0129nh, ch\u00e1n ng\u1eaft v\u1edbi ch\u1eef (text) v\u00e0 h\u00ecnh \u1ea3nh x\u00e2y d\u1ef1ng tr\u00ean n\u1ec1n t\u1ea3ng HTML.<\/p>\n

HTM5 gi\u00fap video tr\u1edf th\u00e0nh m\u1ed9t th\u00e0nh ph\u1ea7n t\u01b0\u01a1ng t\u1ef1 nh\u01b0 \u1ea3nh hay ch\u1eef, do \u0111\u00f3, ch\u00fang d\u1ec5 d\u00e0ng \u0111\u01b0\u1ee3c c\u00e1c c\u1ed7 m\u00e1y t\u00ecm ki\u1ebfm nh\u1eadn di\u1ec7n.<\/p>\n

B\u1eaft \u0111\u1ea7u\u00a0t\u1eeb c\u00e1ch \u0111\u00e2y g\u1ea7n 6 n\u0103m nh\u01b0ng HTML5 v\u1eabn ch\u1ec9 l\u00e0 m\u1ed9t\u00a0\u00fd t\u01b0\u1edfng\u00a0thu\u1ea7n t\u00fay, khi th\u1ef1c t\u1ebf tri\u1ec3n khai g\u1eb7p kh\u00f4ng \u00edt kh\u00f3 kh\u0103n v\u00ec thi\u1ebfu codec (m\u00e3)\u00a0h\u1ed7 tr\u1ee3, c\u00e1c tr\u00ecnh duy\u1ec7t ch\u01b0a s\u1eb5n s\u00e0ng. M\u00e3i g\u1ea7n \u0111\u00e2y, c\u00e1c \u00f4ng l\u1edbn nh\u01b0 Apple, Mozilla, Google, Opera v\u00e0\u00a0Microsoft m\u1edbi b\u1eaft \u0111\u1ea7u tung ra c\u00e1c phi\u00ean b\u1ea3n tr\u00ecnh duy\u1ec7t m\u1edbi h\u1ed7 tr\u1ee3 HTML5.<\/p>\n

Ti\u1ec1m n\u0103ng nh\u01b0ng tr\u01b0\u1edbc m\u1eaft, HTML5 ch\u01b0a th\u1ec3 nhanh ch\u00f3ng \u0111\u00e1nh b\u1ea1i Flash hi\u1ec7n c\u00f3 m\u1eb7t tr\u00ean 95% PC to\u00e0n c\u1ea7u. V\u00ec th\u1ebf, c\u00f3 ng\u01b0\u1eddi v\u00ed HTML5 nh\u01b0 ch\u00e0ng hi\u1ec7p s\u0129 \u0111ang \u201c\u0111\u00e1nh nhau v\u1edbi c\u1ed1i xay gi\u00f3\u201d.<\/p>\n\n\n\n\n
\"\"<\/td>\n<\/tr>\n
Th\u01b0\u1edfng th\u1ee9c Youtube 720p v\u00e0 tr\u1ea3i nghi\u1ec7m \u0111\u1ecbnh d\u1ea1ng t\u1ed1i \u01b0u WebM s\u1ebd kh\u00f4ng c\u00f2n l\u00e0 \u0111i\u1ec1u xa l\u1ea1 trong t\u01b0\u01a1ng lai<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

M\u1edf m\u00e3, WebM s\u1ebd l\u00ean ng\u00f4i?<\/p>\n

Tuy v\u1eady, m\u1ecdi chuy\u1ec7n \u0111ang b\u1eaft \u0111\u1ea7u thay th\u1ed5i, v\u1edbi s\u1ef1 c\u00f3 m\u1eb7t c\u1ee7a VP8, m\u1ed9t chu\u1ea9n codec m\u01a1 \u01b0\u1edbc \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c hai ti\u00eau ch\u00ed mi\u1ec5n ph\u00ed v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng ho\u00e0n h\u1ea3o.<\/p>\n

L\u00e2u nay, m\u1ed7i \u0111\u1ecbnh d\u1ea1ng video th\u01b0\u1eddng ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng v\u1edbi m\u1ed9t s\u1ed1 thu\u1eadt to\u00e1n codec ri\u00eang, n\u1ed5i b\u1eadt c\u00f3 H.263, H.264, Theora v\u00e0 VP8. Flash c\u00f3 \u0111\u1ecbnh d\u1ea1ng FLV s\u1eed d\u1ee5ng H.263, trong khi Flash VP6 ch\u1ec9 \u201cch\u01a1i\u201d v\u1edbi VP6.<\/p>\n

\u0110\u1ec3 chuy\u1ec3n ph\u00e1t video, HTML5 ph\u1ea3i s\u1eed d\u1ee5ng c\u00e1c codec nh\u1ea5t \u0111\u1ecbnh, trong khi c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t tr\u00ecnh duy\u1ec7t v\u1eabn ch\u01b0a th\u1ed1ng nh\u1ea5t s\u1ebd ch\u1ecdn codec n\u00e0o. IE c\u1ee7a Microsoft v\u00e0 Safari h\u1ee9a h\u1eb9n s\u1ebd h\u1ed7 tr\u1ee3 HTML5 v\u1edbi chu\u1ea9n H.264 (codec \u0111\u00f3ng c\u1ee7a MPEG-LA c\u00f3 ph\u00ed s\u1eed d\u1ee5ng r\u1ea5t cao, m\u1eb7c d\u00f9 \u0111\u01b0\u1ee3c xem l\u00e0 c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t nh\u1ea5t hi\u1ec7n nay). Firefox v\u00e0 Opera ch\u1ecdn Theora, m\u1ed9t codec m\u00e3 m\u1edf. Ri\u00eang Chrome th\u1ecfa m\u00e3n c\u1ea3 hai lo\u1ea1i codec H.264 v\u00e0 Theora.<\/p>\n

Ch\u00ednh s\u1ef1 chia r\u1ebd gi\u1eefa c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t tr\u00ecnh duy\u1ec7t v\u00e0 kh\u00f3 kh\u0103n tr\u01b0\u1edbc gi\u00e1 c\u1ea3 qu\u00e1 \u0111\u1eaft khi s\u1eed d\u1ee5ng m\u00e3 \u0111\u00f3ng chu\u1ea9n codec H.264 \u0111\u00e3 l\u00e0m cho HTML5 gi\u1eadm ch\u00e2n t\u1ea1i ch\u1ed7.<\/p>\n

WebM, \u0111\u1ecbnh d\u1ea1ng video m\u1edbi d\u1ef1a tr\u00ean chu\u1ea9n VP8 ch\u00ednh l\u00e0 c\u00e2u tr\u1ea3 l\u1eddi.<\/p>\n\n\n\n
WebM<\/strong> vi\u1ebft t\u1eaft c\u1ee7a\u00a0Web Media<\/strong>, h\u1ee9a h\u1eb9n s\u1ebd thay th\u1ebf FLV trong nay mai nh\u1edd ch\u1ea5t l\u01b0\u1ee3ng video r\u1ea5t t\u1ed1t, dung l\u01b0\u1ee3ng nh\u1ecf g\u1ecdn, thu\u1eadn ti\u1ec7n cho vi\u1ec7c ph\u00e1t qua web. Youtube khi ph\u00e1t clip chu\u1ea9n 720p s\u1ebd s\u1eed d\u1ee5ng \u0111\u1ecbnh d\u1ea1ng WebM.<\/span><\/span><\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

VP8 l\u00e0 codec video m\u1edbi xu\u1ea5t hi\u1ec7n tr\u00ean th\u1ecb tr\u01b0\u1eddng, do On2 ph\u00e1t tri\u1ec3n, thay th\u1ebf c\u00e1c th\u1ebf h\u1ec7 VP6, VP7 tr\u01b0\u1edbc \u0111\u00f3. Khi so s\u00e1nh VP8 v\u1edbi H.264, ng\u01b0\u1eddi ta kh\u00f4ng th\u1ea5y s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng, \u0111\u1ed3ng th\u1eddi VP8 t\u1ecf ra v\u01b0\u1ee3t tr\u1ed9i khi \u0111\u1ecbnh d\u1ea1ng t\u1eadp tin nh\u1ecf h\u01a1n r\u1ea5t nhi\u1ec1u l\u1ea7n.<\/p>\n

\u0110\u1ebfn khi Google quan t\u00e2m t\u1edbi VP8 b\u1eb1ng vi\u1ec7c mua l\u1ea1i On2, VP8 b\u1eaft \u0111\u1ea7u tr\u1edf th\u00e0nh \u0111\u1ec1 t\u00e0i n\u00f3ng. Th\u00e1ng 5-2010, m\u1ed9t chuy\u1ec7n \u0111\u01b0\u1ee3c xem l\u00e0 \u201c\u0111\u1ed9ng tr\u1eddi\u201d v\u1edbi HTML5, khi Google m\u1edf m\u00e3 VP8, mi\u1ec5n ph\u00ed s\u1eed d\u1ee5ng, c\u00f9ng v\u1edbi \u0111\u1ecbnh d\u1ea1ng m\u1edbi WebM v\u00e0 d\u1ef1 \u00e1n\u00a0www.webmproject.org<\/a>.<\/p>\n

V\u1edbi WebM, ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i kh\u00f4ng c\u1ea7n quan t\u00e2m t\u1edbi c\u00e1c Plugin hay c\u00e0i c\u00e1c codec kh\u00e1c, khi s\u1eed d\u1ee5ng ch\u1ebf \u0111\u1ed9 m\u00e3 h\u00f3a video theo chu\u1ea9n VP8 v\u00e0 audio theo Vorbis (m\u00e3 m\u1edf). \u0110i\u1ec1u quan tr\u1ecdng h\u01a1n, c\u00e1c tr\u00ecnh duy\u1ec7t th\u1ebf h\u1ec7 m\u1edbi nh\u01b0 Mozilla Firefox, Opera, Google Chrome v\u00e0 IE9 \u0111\u1ec1u s\u1eb5n s\u00e0ng h\u1ed7 tr\u1ee3, trong khi Safari c\u0169ng h\u1ed7 tr\u1ee3 b\u1ea5t k\u00ec codec n\u00e0o c\u00e0i v\u00e0o QuickTime v\u00e0 t\u01b0\u01a1ng lai c\u0169ng s\u1ebd cho ph\u00e9p WebM.<\/p>\n

Epiphany \u0111\u00e3 b\u1eaft \u0111\u1ea7u h\u1ed7 tr\u1ee3 WebM th\u00f4ng qua n\u1ec1n t\u1ea3ng Gstreamer. C\u00e1c tr\u00ecnh ph\u00e1t \u0111a ph\u01b0\u01a1ng ti\u1ec7n nh\u01b0 VLC, Miro, Moovida, Winamp, Mplayer c\u0169ng \u0111\u00e3 s\u1eb5n s\u00e0ng h\u1ed7 tr\u1ee3. Nh\u00f3m ph\u00e1t tri\u1ec3n Ffmpeg c\u0169ng nhanh ch\u00e2n h\u1ed7 tr\u1ee3 VP8. Theo th\u1ed1ng k\u00ea, hi\u1ec7n c\u00f3 \u0111\u1ebfn g\u1ea7n 50 \u0111\u1ed1i t\u00e1c, n\u1ec1n t\u1ea3ng \u0111\u00e3 s\u1eb5n s\u00e0ng v\u1edbi WebM v\u00e0 VP8, trong \u0111\u00f3 c\u00f3 Android (c\u00f4ng b\u1ed1 v\u00e0o qu\u00fd 4 \u2013 2010), AMD, ARM, Broadcom, Intel, Qualcomm, NVIDIA, Sorenson Media, Logitech<\/p>\n

Ch\u1ec9 c\u00f2n ch\u1edd th\u1eddi gian, cu\u1ed9c chi\u1ebfn s\u1ed1ng c\u00f2n gi\u1eefa WebM\u00a0c\u00f9ng VP8\u00a0\u0111\u1ed1i\u00a0\u0111\u1ea7u v\u1edbi\u00a0Flash!<\/p>\n

Theo: TTO<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

TTO – Hi\u1ec7n nay, \u0111\u1ec3 duy\u1ec7t video v\u00e0 n\u1ed9i dung \u0111a ph\u01b0\u01a1ng ti\u1ec7n tr\u00ean web n\u00f3i chung, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n d\u1ecbch v\u1ee5 v\u00e0 ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i ch\u1ee7 y\u1ebfu\u00a0d\u00f9ng n\u1ec1n t\u1ea3ng Flash. Tuy \u0111ang chi\u1ebfm l\u0129nh ph\u1ea7n l\u1edbn th\u1ecb ph\u1ea7n nh\u01b0ng c\u00f4ng ngh\u1ec7 n\u00e0y c\u1ed3ng k\u1ec1nh v\u00e0\u00a0tr\u1edf th\u00e0nh \u0111\u00edch ng\u1eafm c\u1ee7a tin t\u1eb7c khai th\u00e1cContinue reading “\u0110\u1ecbnh d\u1ea1ng chu\u1ea9n video m\u1edf WebM”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"class_list":["post-555","post","type-post","status-publish","format-standard","hentry","category-open-standards","entry"],"_links":{"self":[{"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/posts\/555"}],"collection":[{"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/comments?post=555"}],"version-history":[{"count":4,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/posts\/555\/revisions"}],"predecessor-version":[{"id":559,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/posts\/555\/revisions\/559"}],"wp:attachment":[{"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/media?parent=555"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/categories?post=555"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/tags?post=555"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}