Flv progressive download seek

For example, JW Player uses "start" as can be seen in the following code fragment:. The above sample code assumes that the requested video was encoded using H. It will seek 30 seconds into an H. However, you may also configure a link to always start at a certain position.

In such a case, our CDN will always generate truncated video content that starts at the specified position. By default, seeking within a video will allow the viewer to view the entire video from that point forward. Alternatively, define the seek end parameter i.

Our CDN service will only serve the content that falls between the specified seek start and end time. Setup information for video encoded using the H. This term represents the position in the video where the video will start or end.

This position should be specified as the number of seconds from the beginning of the video asset. This term represents the total number of bytes that is represented by 1 second in the scrubber bar. A scrubber bar is the progress bar that allows you to seek within a video. How you choose to deploy your video will determine how you create your video content and how you integrate it for use with Flash.

Although in this article I focus only on the delivery of FLV files, you can use the same methods to deliver MP3 audio files: embed, progressively download, or stream. The technical methods of delivering audio—as well as the features and benefits for each delivery approach—are identical to those for delivering video discussed here. Let me start with the embedded video delivery option.

Since the introduction of Flash MX and Flash Player 6, multimedia developers have been able to embed video within Flash movies by importing video and placing it on the Timeline using the Video Import Wizard see Figure 1. Figure 1 Embedded video on the Timeline. When the Flash movie is published, the video is fully contained in the SWF file, only requiring a normal web server for delivery. With this method, the video content is placed on the Flash Timeline and "baked in" the SWF file with other Flash content.

As with an imported bitmap or vector artwork file, an embedded video file becomes part of the Flash document. For this reason, you can import only very short video clips. Other content, events, and interactivity in the SWF file can be synchronized with the video through the Timeline.

Perhaps the biggest benefit of the embed method of delivering Flash video is that it is easy to use and understand. Anyone familiar with the Flash Timeline should have no trouble delivering video with this method. However, when using this method, you are likely to experience the following drawbacks:. Because of these limitations, embedded delivery is recommended only for special cases in which you absolutely need both the video and Flash content to be in the same SWF file and when the video is short and small.

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Generally speaking, a live website tends to use various streaming methods in different lines because there is no method that can fit all platforms and all application scenarios very well. Here we focus on http. Content-Length header in http response indicates the length of body in bytes.

HTTP clients will receive the specified length of data after parsing headers. There are 2 special cases where no Content-Length is provided:.

The latter is better because the tcp connection can keep alive useless in live scenario. Since chunked encoding is introduced from http1. The typical response headers of a http-flv request is like this:. Streaming servers that support http-flv must be able to convert rtmp stream into flv stream. Here are 2 streaming servers that support http-flv:. I am going to clarify some concept in rtmp protocol:.

FLV is the simplest video containing format. A flv video file consist of a header and a series of tags. A tag also has header and body.