چند رسانه ايHTML Multimedia -
Previous > <Nextچند رسانه اي ها در وب صدا، موسيقي، فيلم، فيلم وانيميشن است.
چند رسانه اي چيستWhat is Multimedia -
،چند رسانه اي در فرمت هاي مختلفي ارائه ميشود .هر چيزيكه مي توانيد به بينيديا بشونيد مانند تصاوير، موسيقي، صدا، فيلم ، ضبط ، فيلم انيميشن وموارد ديگر را شامل ميشود.
صفحات وب اغلب حاوي عناصر چند رسانه اي در فرمت هاي مختلف ميباشند.
پشتيباني مرورگرهاBrowser Suppert -
اولين مرورگرها فقط از متن پشيباني ميكردند كه با ويژگيهاي رنگ وفونت ختم ميشد .بدنبال مرورگرهائي آمدند كه از رنگها، فونتها، تصاوير وچند رسانه اي پشتباني ميكنند.
فرمت هاي چندرسانه ايMultimedia Formats -
عناصر چند رسانه اي مانند صدا يا تصوير در فايلهاي رسانه اي ذخيره ميشوند.رايج ترين راه براي كشف نوع فايل نگاه پسوندآنست .فايل هاي چند رسانه اي داري فرمت وپسوند هاي مختلفي مانند .wav, .mp3 , .mp4 , .mpg , .vmv , .avi هستند
فرمت هاي رايج ويدوئيCommon Video Formats -
|
فرمت هائي در بيرون براي ويدئو وجودارد .اما فرمت هايMP4,WebM وOgg درHTML پشتيباني پشتيباني ميشوند .وMP4 براي YouTube توصيه شده است . |
فرمت وپسوند فايلهاي ويدئوئي مطابق جدول زير:
| Format | File | Description |
|---|---|---|
| MPEG | .mpg .mpeg |
MPEG. Developed by the Moving Pictures Expert Group. The first popular video format on the web. Not supported anymore in HTML. |
| AVI | .avi | AVI (Audio Video Interleave). Developed by Microsoft. Commonly used in video cameras and TV hardware. Plays well on Windows computers, but not in web browsers. |
| WMV | .wmv | WMV (Windows Media Video). Developed by Microsoft. Commonly used in video cameras and TV hardware. Plays well on Windows computers, but not in web browsers. |
| QuickTime | .mov | QuickTime. Developed by Apple. Commonly used in video cameras and TV hardware. Plays well on Apple computers, but not in web browsers. |
| RealVideo | .rm .ram |
RealVideo. Developed by Real Media to allow video streaming with low bandwidths. Does not play in web browsers. |
| Flash | .swf .flv |
Flash. Developed by Macromedia. Often requires an extra component (plug-in) to play in web browsers. |
| Ogg | .ogg | Theora Ogg. Developed by the Xiph.Org Foundation. Supported by HTML. |
| WebM | .webm | WebM. Developed by Mozilla, Opera, Adobe, and Google. Supported by HTML. |
| MPEG-4 or MP4 |
.mp4 | MP4. Developed by the Moving Pictures Expert Group. Commonly used in video cameras and TV hardware. Supported by all browsers and recommended by YouTube. |
نكته ـ فقط مواردMP4,WebM وOgg توسطHTML استاندارد پشتيباني ميشود.
فرمت هاي رايج صوتيCommon Audio Formats -
بهترين فرمت براي ضبط موسيقي روش فشردهMP3 است . اين نوع مترادف با موسيقي ديجيتال شده است .براي وب سايت هاي مشمول موسيقي اين بهترين گزينه است.
| Format | File | Description |
|---|---|---|
| MIDI | .mid .midi |
MIDI (Musical Instrument Digital Interface). Main format for all electronic music devices like synthesizers and PC sound cards. MIDI files do not contain sound, but digital notes that can be played by electronics. Plays well on all computers and music hardware, but not in web browsers. |
| RealAudio | .rm .ram |
RealAudio. Developed by Real Media to allow streaming of audio with low bandwidths. Does not play in web browsers. |
| WMA | .wma | WMA (Windows Media Audio). Developed by Microsoft. Plays well on Windows computers, but not in web browsers. |
| AAC | .aac | AAC (Advanced Audio Coding). Developed by Apple as the default format for iTunes. Plays well on Apple computers, but not in web browsers. |
| WAV | .wav | WAV. Developed by IBM and Microsoft. Plays well on Windows, Macintosh, and Linux operating systems. Supported by HTML. |
| Ogg | .ogg | Ogg. Developed by the Xiph.Org Foundation. Supported by HTML. |
| MP3 | .mp3 | MP3 files are actually the sound part of MPEG files. MP3 is the most popular format for music players. Combines good compression (small files) with high quality. Supported by all browsers. |
| MP4 | .mp4 | MP4 is a video format, but can also be used for audio. Supported by all browsers. |
نكته ـ فقطMP3 , WAV و Oggبوسيله HTML استاندارد پشتيباني ميشوند .
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