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Questions tagged [decklink]

11 questions
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1 answer

Why the source order matters on working with multiple media sources in a single AVFormatContext?

avformat_open_input() deletes the AVFormatContext* and returns -6 when the source order changes. I am trying to open multiple media sources dynamically with different(mixed) formats and codecs in a single context (AVFormatContext). My media sources…
Mehmet YILMAZ
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I have a problem with srt source multiaudio output

Hallo i have a problem with gstreamer srt source multiaudio output on decklink card.when i switch the channes on sdi monitor ther is only one audio.GST_DEBUG=3 gst-launch-1.0 -v srtsrc uri=srt://xxxxxx:xxxx latency=200 !\ tsdemux name=demux demux. !…
Qutela
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adding audio delay in decoding pipeline - decklinkaudiosink

Dear gstreamer community, I am running gstreamer (1.20.3) on ubuntu 22.04 LTS with decklinkdrivers (12.4) After building (and playing around with gstreamer, wathing tutorials etc) the following pipeline I am able to decode a high quality HD SRT…
Roland Horak
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Implementing classes and methods DeckLink SDK

I am a Electrical Engineering student and for first code in my internship I have to write something that captures and saves image and video from a DeckLink Duo 2 card using exclusively the SDK for it, that being my first "real code", unlike the…
kurtiskraft
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Play mpeg-2 file with 608/708 embedded captions out Decklink SDI

I have built ffmpeg with decklink support, it plays my mpg file fine out the SDI but not seeing any captions on my works broadcast monitor (JVC DT-V17G1Z). This monitor shows captions on SDI from my Mojito card but trying to get it to work with a…
asperi
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Is there a minimal working example of C++ DeckLink output?

I would like to write a C++ program that outputs color patches to a monitor via a DeckLink card and samples the signal of a camera which is filming that monitor and also connected to the computer via a DeckLink card. Is there something like a…
filmmakerto
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Decoding H264 PES with PTS

I have a problem with libav. I am using a demuxer (not libav) and I am sure that it is working well. So, problem starts after demuxing. To decode H264 25 fps video, I am supplying PES PTS values to AVPacket PTS value. Libav then decodes AVPacket…
refunse
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Trying to use decklink output from ffmpeg's libavdevice in a C++ app

I'm trying to add support for decklink devices in an video streaming app that my company is developing. We're using C++ and FFMpeg as a processing library. Other types of inputs and outputs are working. Adding support for decklink inputs was really…
Raster
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FFmpeg Decklink playout audio PCM

I'm working on a ffmpeg playout application for Decklink but I'm facing some audio issues. I've seen other questions about this topic but none of them are currently helping. I've tried Reubens code (https://stackoverflow.com/a/15372417/12610231)…
Rick Jansen
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Decklink SDK & QtQuick

I'm trying to use BlackMagic Decklink SDK to display a video from a Decklink card into a QtQuick application. I successfully managed to do the same using QWidgets, so the video stream aquisition part is working. When using QWidgets (more…
Tim Autin
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C++: Read access violation (this-> x was nullptr) with Blackmagic DeckLink SDK

I write a little program depending on the Blackmagic Decklink SDK. When I use the DeckLinkInput interface I get the read access violation message "this->dl_input was nulltr". After hours of debugging I have no idea how to fix this issue. Maybe one…
Polo
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