DATV: How to encode in h.265 with an external HDMI encoder

Seconde méthode automatique de pilotage

As a reminder, this method will only work if you have successfully sent the “video” request to the encoder server, asking it to transmit the audio channel (see above).

  1. In the H264/H265 box control section of the PlutoDVB Controller page, enter the IP address of your encoder so that PlutoDVB can send the optimum parameters to the encoding box. Indeed after having entered the parameters of your DATV broadcast, PlutoDVB will determine the characteristics of the stream that the encoder will have to send. These parameters are in particular the definition (size) of the image, the frame rate automatically calculated from your configuration indicated in the Modulator part.

  2. In the Modulator section, enter your callsign and the usual characteristics of your DATV transmission: Frequency, Mode, Symbal Rate, FEC. Apply your settings by clicking on the Apply Settings button.

  3. Launch VLC (VideoLan). Open the network stream (Media Menu Open Network Stream or CTRL-N) of what the box is able to encode. The channel to connect is the Main stream which is numbered zero, by typing rtsp:// in VLC
    The resolution of the displayed image corresponds to the one that will be sent by the encoder to the PlutoSDR. It is determined by a PlutoDVB script (strategy.sh), depending on the bitrate of the encoded stream (and thus directly from your SR and FEC).
    The resolution of the image corresponds to this table.
    Video RateResolution W (px)Resolution H (px)Audio Video Rate (fps)
    < 100 k38421632 k x110
    < 200 k38421632 k x115
    < 250 k57632432 k x115
    < 400 k76843232 k x225
    < 1200 k128072064 k x 225
    >= 1200 k1920108064 k x 225

    To display the definition, and check the codec used, do CTRL-J

5 thoughts on “DATV: How to encode in h.265 with an external HDMI encoder

  1. Merci pour ce guide.
    Concernant la mise à jour des fichiers système par la clé USB, il faut un hub dit “OTG”, dans mon cas j’utilise un HAMA Hub USB 2 OTG (ou un hub standard + un câble OTG). Il semble également que le disque USB se monte pas automatiquement forcément sous /media/sda… Sur mon Pluto, il apparaît sous /media/sda1.
    Voir nos discussions à ce sujet ici : https://forum.batc.org.uk/viewtopic.php?f=15&t=6626
    73 qro de michel, hb9dug

    Thank you for this guide.
    Concerning the update of the system files by the USB key, you need a hub called “OTG”, in my case I use a HAMA Hub USB 2 OTG (or a standard hub + an OTG cable). It also seems that the USB disk doesn’t automatically mount itself under /media/sda… On my Pluto, it appears under /media/sda1.
    See our discussions on this subject here: https://forum.batc.org.uk/viewtopic.php?f=15&t=6626
    73 qro de michel, hb9dug

    1. Merci Michel pour votre contribution intéressante,
      73 Christian

      Thank you Michel for your interesting contribution,
      73 Christian

  2. Greetings from New Zealand.

    I notice that you have done some work with this inexpensive h264 encoder.
    I have been trying to find out if it can encode 1080i50 as well as 1080p50
    Would this be something you could test? It seems to be very difficult to find.

    Best Regards,

    Salutations de la Nouvelle-Zélande.

    Je remarque que vous avez fait un peu de travail avec ce codeur h264 peu coûteux.
    J’ai essayé de savoir s’il pouvait encoder aussi bien le 1080i50 que le 1080p50
    Serait-ce quelque chose que vous pourriez tester ? Il semble très difficile à trouver.

    Bonne chance,

    1. Stuart,
      Here is a capture where we see that the output is indicated 1080p. Concerning the input I have no way to test the variant. I use a notebook, and I have no other source available. Sorry for the poor help.
      H264 H265 ecnoder 1080p
      Voici une capture où l’on voit que la sortie est indiquée 1080p. Concernant l’entrée je n’ai pas moyen de tester la variante. J’utilise un notebook, et je n’ai pas d’autre source disponible. Désolé pour le peu d’aide.

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