Live Stream to HTML5 Video Tag #598
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FFmpeg supports the HTTP protocol, sure: https://ffmpeg.org/ffmpeg-protocols.html#http |
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I'm not sure what you mean by "range packets" though. Could you elaborate on why this isn't possible with now with FFmpegFrameRecorder? |
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FYI, there is some sample code here: |
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Thanks a lot I will try and let you know, this should be able to start an HTTP Server running inside FFMPEG and do the streaming. My second question was whether I can use my own http server or a web container like tomcat. To do that I will have to implement a Servlet that will respond to Range requests that Chrome and some other browsers will send to download video see example range serlvet here: https://gist.github.com/jsfeng/2629858 . The Range request will usually have an "Accept-Ranges: bytes" header and it will split the video downloading in many byte range requests. So how can I get bytes from the FrameGrabber or the Recorder and get an encoded n amount of bytes? What I am actually trying to achieve is to stream a sequence of images that I receive from a socket in JPEG format into an HTML Canvas element as a live video stream. |
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I see. You can't expect FFmpeg to know magically how many bytes you're going to have before encoding happens... |
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I tried your suggestion and I can't seem to start the FFMPEG HTTP Server. I am getting the following exception: Output #0, webm, to 'http://localhost:9090': This is how I am trying to initialize the WEBM HTTP Streaming Server: |
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regarding second question the HTML5 tag performs a progressive download so if there is nothing encoded yet we will simply wait until there is and in the range requested, meaning that recording will be done in a separate thread somehow. From my understanding It is not actually streaming but endless progressive downloading of byte array pieces. So is there a way to get an encoded packet based on a range? |
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For some reason, it seems like the URLs need to start with "tcp" instead of "http". This works fine here: FFmpegFrameRecorder recorder = new FFmpegFrameRecorder("tcp://localhost:9090?listen", imageWidth, imageHeight);
recorder.setFormat("webm");
recorder.start();For your questions concerning FFmpeg specifically, you should ask on FFmpeg's mailing list, not here. |
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Actually, |
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Hallo, I can not build the javacv-master using mvn install: [ERROR] Failed to execute goal on project javacv: Could not resolve dependencies for project org.bytedeco:javacv:jar:1.3.2-SNAPSHOT: The following artifacts could not be resolved: org.bytedeco:javacpp:jar:1.3.2-SNAPSHOT, org.bytedeco.javacpp-presets:opencv:jar:3.1.0-1.3.2-SNAPSHOT, org.bytedeco.javacpp-presets:ffmpeg:jar:3.2.1-1.3.2-SNAPSHOT, org.bytedeco.javacpp-presets:flycapture:jar:2.9.3.43-1.3.2-SNAPSHOT, org.bytedeco.javacpp-presets:libdc1394:jar:2.2.4-1.3.2-SNAPSHOT, org.bytedeco.javacpp-presets:libfreenect:jar:0.5.3-1.3.2-SNAPSHOT, org.bytedeco.javacpp-presets:libfreenect2:jar:0.2.0-1.3.2-SNAPSHOT, org.bytedeco.javacpp-presets:librealsense:jar:1.9.6-1.3.2-SNAPSHOT, org.bytedeco.javacpp-presets:videoinput:jar:0.200-1.3.2-SNAPSHOT, org.bytedeco.javacpp-presets:artoolkitplus:jar:2.3.1-1.3.2-SNAPSHOT, org.bytedeco.javacpp-presets:flandmark:jar:1.07-1.3.2-SNAPSHOT: Could not find artifact org.bytedeco:javacpp:jar:1.3.2-SNAPSHOT -> [Help 1] |
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Reset the version to 1.3 and try again. |
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Changed pom.xml to 1.3 Now getting same for 1.3: [ERROR] Failed to execute goal on project javacv: Could not resolve dependencies for project org.bytedeco:javacv:jar:1.3: Failure to find org.bytedeco.javacpp-presets:libfreenect2:jar:0.2.0-1.3 in https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced -> [Help 1] |
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Right, you can remove that since you don't need it. |
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I've just released version 1.3.1 with the fix, so no need to build from source. Enjoy! |
Hallo,
Is it possible to use JavaCV to live-stream a sequence of images from a FrameGrabber into an HTML5 Canvas as an html5 video stream (currently OGV, MP4, WEBM are supported from browsers). I can see that FFMPEG supports http streaming using an expiramental http server: https://ffmpeg.org/ffmpeg-protocols.html#http but how can that be possible using javacv?
Identically could it be possible to use the framegrabber on a servlet and serve Range packets using the FFMPEGRecorder?
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