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• videostreaming in java with bytedeco maven dependencies

  22 octobre 2020, par faenschi

  we try to setup a videostreamig service in java. our applications runs in a docker container on openshift. therefore we install ffmpeg in the dockerfile.

  


  in java we use the bytedeco maven dependencies. but i'm really not sure which dependency version runs with which ffmpeg version installed in the container. is there somewhere a overview ? does anybody have a similar setup ?

  


  at the moment we use the 1.5.4 maven dependencies and ffmpgen v4.3.1 in the container :

  


   <dependency>&#xA;        <groupid>org.bytedeco</groupid>&#xA;        <artifactid>javacv-platform</artifactid>&#xA;        <version>1.5.4</version>&#xA;    </dependency>&#xA;&#xA;    <dependency>&#xA;        <groupid>org.bytedeco</groupid>&#xA;        <artifactid>javacpp-platform</artifactid>&#xA;        <version>1.5.4</version>&#xA;    </dependency>&#xA;&#xA;   &#xA;    <dependency>&#xA;        <groupid>org.bytedeco</groupid>&#xA;        <artifactid>ffmpeg-platform</artifactid>&#xA;        <version>4.3.1-1.5.4</version>&#xA;    </dependency>&#xA;

  


  this does not work. the pod crashes as soon as i start the streaming. if i use ffmpeg v 3.x with a older centos base image and the dependency above the pod does not crash..but the streaming does not work either.

  


  any help appreciated
angela

  


• Merging .flv chunks from stream site

  4 décembre 2016, par Iztooi

  I’m trying to download a video from an alternative version of the Ustream site. This site is apparently used for a DRM protection, in fact you can’t watch this video without having access to it through a login from this site.
  The video system should be the same used by ustream (same links), that is calling different flv chunks every x seconds and merging them into the stream (similar to an rtmp service, but it doesn’t use this protocol).

  I managed to download every .flv chunks composing this video, but i had issues on merging them into a single file. First of all these flvs files have some audio/video lags/problems, but since there is no other way to download this video i’m not complaining about lags.

  The real issue is that every flv file has an additive increase on the duration, despite having a normal size. Video duration is about 6 seconds, so the first chunk is 6 seconds long, the second chunk is 12 seconds long, although only the first 6 are visible (the remaining 6 are "corrupted"). If i try to merge (with ffmpeg or any video-joining software) all these files (about 600-700, for a total duration of 1 hour and 15 minutes) only the first two sections are visible, then I cannot see anything. (Being more clear, if i try to merge the first 2 chunks, file is 18 seconds long and i can see the first 12 ; if i try to merge the first 3 chunks, file is 36 seconds long and i can still only see the first 12 seconds.)

  Anyone has any idea ?

• two data streams into one ffmpeg stream

  1er juin 2022, par user5285766

  I have two data streams, each representing a rabbitmq subscriber. Inside audio and video streams, data is in the form of bytes. Something like :

  


  vp = VideoProcess()
ap = AudioProcess()


async def receive_video_data(message: IncomingMessage):
    async with message.process():
        await vp.process(frame=message.body)


async def receive_audio_data(message: IncomingMessage):
    async with message.process():
        await ap.process(packet=message.body)




  


  I wanted to take this data from each stream and put it in the ffmpeg stream, which would open the port on the service. So that I can broadcast this data to other subsystems in the form of an ffmpeg stream (for example, to broadcast audio and video to my html page). Can you tell me what are the options for this task ?

  


  process = sp.Popen(
    shlex.split(
        f"ffmpeg -i ...."
    ))