I have a website where I stream my own videos, I use 2 video formats: MP4 and FLV they both have almost the same size
I notice that FLV load almost instantly but the MP4 takes like 35-60 seconds before it start playing
Media info:
MP4:
http://pastebin.com/kCET5YKP
FLV:
http://pastebin.com/tfKgZEBg
Tested with Apache and Litespeed web-server
Server config:
CPU: Intel Xeon E3
RAM: 8GB
HDD: 1TB
Network: 1Gbps dedicated
first, you should understand that flv is mainly used to live streaming and mp4 for vod(video-on-demand). generally, mp4 format has a big header contains metadata of all frames, so the player start playing it until download entire headers(many boxes).But flv has a little bit header(codec data), each tag contains a frame and tag's header describe tagtype, codecID, pts, dts.... It's similar to TS.
On the other hand, may be related to behavior of the player.
My English is very poor, please bear with me.
Related
I set up a nginx server and I can broadcast using rtmp. I do this by compressing it with h264, but I also need to compress it with h265. rtmp and flv do not support h265.
as a result can you offer me a server and protocol to use h265? get open source if possible.
edit:
okey should not explain the problem a little more. I can send a video to my nginx server with a client and watch this video in hls and dash.
But what I have to do is compress this video with a h265 applet with a converter like ffmpeg and then watch it or send it to another client. I couldn't find anything other than rtmp to send and receive videos.
MP4 and MKV both support H.265 video streams.
You can use DASH or HLS to stream your MP4 segments.
I want to play the video simultaneously while it is downloading via unitywebrequest. Will AVPro video support this? If so please provide me some guidance, as i am new to unity and avpro video. I can able to play the video which is downloaded fully through FullscreenVideo.prefab in AVPro demo. Any help will be much appreciated.
There are two main options you could use for displaying the video while it is still downloading.
Through livestream
You can stream a video to AVPro video using the "absolute path or URL" option on the media player component, then linking this to a stream in rtsp, MPEG-DASH, HLS, or HTTP progressive streaming format. Depending on what platforms you will be targeting some of these options will work better than others
A table of which file format supports what platform can be found in the AVProVideo Usermanual that is included with AVProVideo from page 12 and onwards.
If you want to use streaming you also need to set the "internet access" option to "required" in the player settings, as a video cannot stream without internet access.
A video that is being streamed will automatically start/resume playing when enough video is buffered.
This does however require a constant internet connection which may not be ideal if you're targeting mobile devices, or unnecessary if you're planning to play videos in a loop.
HLS m3u8
HTTP Live Streaming (HLS) works by cutting the overall stream into shorter, manageable hunks of data. These chunks will then get downloaded in sequence regardless of how long the stream is. m3u8 is a file format that works with playlists that keeps information on the location of multiple media files instead of an entire video, this can then be fed into a HLS player that will play the small media files in sequence as dictated in the m3u8 file.
using this method is usefull if you're planning to play smaller videos on repeat as the user will only have to download each chunk of the video once, which you can then store for later use.
You can also make these chunks of video as long or short as you want, and set a buffer of how many chunks you want to have pre-loaded. if for example you set the chunk size to 5 seconds, with a buffer of 5 videos the only loading time you'll have is when loading the first 25 seconds of the video. once these first 5 chunks are loaded it will start playing the video and load the rest of the chunks in the background, without interrupting the video (given your internet speed can handle it)
a con to this would be that you have to convert all your videos to m3u8 yourself. a tool such as FFMPEG can help with this though.
references
HLS
m3u8
AVPro documentation
I am seeking the following three items, which I cannot find on STACKOVERFLOW or anywhere:
sample code for AVFoundation capturing to file chunks (~10seconds) that are ready for compression?
sample code for compressing the video and audio for transmisison across the Internet?
ffmpeg?
sample code for HTTP Live Streaming sending files from iPhone to Internet server?
My goal is to use the iPhone as a high quality AV camcorder that streams to a remote server.
If the intervening data rate bogs down, files should buffer at the iPhone.
thanks.
You can use AVAssetWriter to encode a MP4 file of your desired length. The AV media will be encoded into the container in H264/AAC. You could then simply upload this to a remote server. If you wanted you could segment the video for HLS streaming, but keep in mind that HLS is designed as a server->client streaming protocol. There is no notion of push as far as I know. You would have to create a custom server to accept pushing of segmented video streams (which does not really make a lot of sense given the way HLS is designed. See the RFC Draft. A better approach might be to simply upload the MP4(s) via a TCP socket and have your server segment the video for streaming to client viewers. This could be easily done with FFmpeg either on the command line, or via a custom program.
I also wanted to add that if you try and stream 720p video over a cellular connection your app will more then likely get rejected for excessive data use.
Capture Video and Audio using AVFouncation. You can specify the Audio and Video codecs to kCMVideoCodecType_H264 and kAudioFormatMPEG4AAC, Frame sizes, Frame rates in AVCaptureformatDescription. It will give you Compressed H264 video and AAC aduio.
Encapsulate this and transmit to server using any RTP servers like Live555 Media.
I have a doubt jwplayer can read only flv files or it can read every files
With over one million active users,
the JW Player™ is the Internet's most
popular and flexible open source media
player. It can support playback of any
format the Adobe Flash Player can
handle (FLV, MP4, MP3, AAC, JPG, PNG
and GIF).
http://www.longtailvideo.com/
EDIT
If you need to deal with any other formats, you can run the conversions server side using ffmpeg
Reference
http://www.ffmpeg.org/
What's the best way to encode video (with audio) on the iPhone? It looks like QTKit isn't available... so I might have to link with ffmpeg, but ffmpeg doesn't look like it encodes H.264 (judging from their home page.)
If it is possible, I'm also curious how fast I can expect it to perform on the ARM. I imagine it might take minutes to encode a 20sec movie.
Both ffmpeg and mencoder will encode H2.264 videos when combined with x264, but I'd imagine getting it all running iPhone would be an absolute nightmare, let alone the performance of it once you've got it running.
A while ago I wrote an AVI encoder for the iPhone that used raw file I/O. I just started work on a QuickTime encoder that encodes BMP data into a quicktime container. If it is H.264 you want to encode, I would try making a server that uses QTKit and having your app connect to that for conversion.