I am building on demand video streaming application based on user interaction at frontend using FFMPEG and RTMP, which eventually converted to HLS using nginx-rtmp-module, with hls_continuous flag set to true.
While running back to back FFMPEG command to RTMP(i.e. once one FFMPEG command done with execution at RTMP stream, another FFMPEG command is executed at same stream), observation at VideoJs player that some of the HLS segment keeps repeating.
Would be great help if someone could help me to figure out what could be possible reason, and how to fix the same?
Thanks in Advance.
Compare your code to this example
https://videojs.github.io/videojs-contrib-hls/
Related
How can I save the video after live streaming of nginx-rtmp-module and play it back with hls . I use record to save to flv and then convert flv to m3u8, it takes a lot of time if the video is large. If I use hls_cleanup off, I can't actively choose to turn the record on or off. What is the correct way to save and play back using hls ? Please or show me if you know . Thanks very much
For small video file, both DVR-FLV or HLS are OK.
For large video file, as you mentioned, HLS is better. You need to manage each ts file and its duration, to generate the m3u8 index when streaming finished.
If you need to merge multiple publish stream to one stream, HLS is also better, for example, if need to adjust the encoder, use another encoder, or reconnect to server for network fail. If use DVR-FLV, there will be more than one FLV file and it's hard to merge them(need to covert to ts, concat them, then transcoding).
Furthermore, HLS is much better for producing during streaming, like sport programs, you may need to produce many VoD files during live streaming, and we can't wait streaming end:
encoder ---RTMP---> Server --HLS--> VoD During Streaming
I have a server (not internet connected) that hosts a webpage with company data on an internal website. The server also contains videos (thousands of them) in a defined directory structure.
When a client connects I can display the videos to them on the internal website. The problem is some of the video files are 1Gb or larger and the connection to some clients is rather slow; the browser seems to be trying to download them in order to play them rather than stream them.
Is there a video streaming server that I could send a file path to and it would serve the video back to the client as a stream?
I guess this is essentially transcoding the video that I need done. I'm not sure if PLEX or something like that is able to do it dynamically as there are hundreds of videos and new videos added all the time.
Sorry if i'm not being clear on my need. Send me a question if I haven't been clear on a point.
...the browser seems to be trying to download them in order to play them rather than stream them.
To echo what #Offbeatmammal said in the comments, if you're using MP4 files, you need to ensure the MOOV atom is at the beginning of the file. Without it, the browser doesn't know what byte offsets to request.
Ideally, encode your video files as fragmented. In FFmpeg:
ffmpeg -i ... -f mp4 -movflags frag_keyframe+empty_moov output.mp4
See also: https://stackoverflow.com/a/9734251/362536
That should allow the client to stream the MP4 files from any web server that supports HTTP/1.1 range requests. (Most all do, unless configured otherwise.)
However, there is another point to address:
The problem is some of the video files are 1Gb or larger and the connection to some clients is rather slow...
While fixing the streaming issue means the clients won't have to download the whole file first, they still need the bandwidth to keep up with the stream. If it's possible they won't, you'll want to implement some sort of transcoder.
I would recommend using an existing segmented streaming method such as DASH or HLS. HLS is currently the most compatible, thanks to Apple's platform policies. Either will enable adaptive bitrate switching, which will allow slow clients to automatically switch to a lower bitrate stream that they can smoothly keep up with. That way, slower clients can still see the video, albeit a lower quality one, while fast clients can get the full quality video.
You can use FFmpeg to do the transcoding and HLS playlist creation.
I'm not sure if PLEX or something like that is able to do it dynamically as there are hundreds of videos and new videos added all the time.
As for when you do this transcode, I suppose it depends on how much load you're looking at. If this is just one or two people viewing the file, you can transcode on demand if your servers can keep up. Ideally, you have at least a couple stream variants around for less popular files, and add more later if needed.
If you're doing this live, I'd recommend doing all of your transcoding up front. You can always prune old files/variants if you need the storage back.
I'm trying to figure our what's the best method to receive live streaming video at a server, and making it available back to the client.
I noticed two modules for nginx:
https://github.com/arut/nginx-rtmp-module
https://github.com/arut/nginx-ts-module
It looks like both modules support HLS for video streaming.
What is the difference then between the options?
Apparently you can stream HLS/DASH with both but the nginx-ts-module has fewer features. You can setup both using docker and test which one suits your needs better. I'd almost always go with the simpler option.
I want to do encode a live stream for MPEG-DASH in various bitrates and resolutions for live playback.
Everything I found so far either uses only the source resolution (Nimble, nginx-rtmp-module) or seems to be only for VOD streaming(DASHEncoder).
Is it possible to use DASHEncoder with a live input (rtmp stream) and how would I do that?
If not, is it possible to use nginx-rtmp + ffmpeg for what I want to do?
There are several different services available which support such use-cases, like NGINX Plus.
I also successfully managed to run a live stream with Bitmovin and to the best of my knowledge livestream.com is also capable of doing that.
I'm trying to record a DVB-Channel with a DVB-T Tuner.
I already did much research on this topic but I don't get really "information" what to do.
Basically I'm already able to create a own Graph with the default GraphEdit, make a tune request and watch a channel. Converting the Graph to C# Code with the DirectShowLib or to C++ isn't a big problem for me.
But what I don't know, what is the right approach to record the movie. (Without decode it to mpeg / avi and so on.)
The most important parts of the graph are some tuning related filters, they connect to the demultiplexer (demux), and the demux will output a video and audio stream.
The easiest way to get the mpeg stream is putting a filter before the demux. For example a samplegrabber. There you will receive the complete transport stream as it is broadcasted. But that normally contains multiple programs which are multiplexed on the same frequency. If you only need one program, you need to filter the other programs out of the stream.
If you only need a single program, it is probably easier to directly connect the audio and video stream coming out of the demultiplexer, to a multiplexer, and write it's output to a file. You need to make sure there is no decoder or any other filter between the demux and the mux. The problem is that you need to find a directshow multiplexer, as windows does not contain a standard multiplexer. I don't know any free multiplexer.
What you also can do is write the audio and video directly to a file. (again without decoding, or anything else). Then use for example ffmpeg to join the audio and video to a single file.
C:\> ffmpeg -i input.m2v -i input.mp2 -vcodec copy -acodec copy output.mpg
You probably also need to delay the audio or video stream to get them in sync.
One addition, of course you can also use ffmpeg to convert the multi program transport stream to a single program stream.