[FFmpeg-user] Decklink output can't produce 1080i50

[Mustafa Al Ani]

ffmpeg -f libndi_newtek -i "MED-GW-01 (IO-ENC-01-NDI-01_VR)" -f
decklink 'DeckLink Duo (1)'

ffmpeg version N-90713-g955fa23 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
  configuration: --enable-libndi_newtek
--extra-cflags='-I/home/ls/ffmpeg/ndi/include
-I/home/ls/ffmpeg/decklink/Linux/include'
--extra-ldflags=-L/home/ls/ffmpeg/ndi/lib/x86_64-linux-gnu
--enable-libsrt --enable-ffplay --enable-decklink --enable-libx264
--enable-nonfree --enable-gpl --enable-libfdk-aac --enable-libx265
--enable-openssl
  libavutil      56. 13.100 / 56. 13.100
  libavcodec     58. 17.100 / 58. 17.100
  libavformat    58. 11.101 / 58. 11.101
  libavdevice    58.  2.100 / 58.  2.100
  libavfilter     7. 15.100 /  7. 15.100
  libswscale      5.  0.102 /  5.  0.102
  libswresample   3.  0.101 /  3.  0.101
  libpostproc    55.  0.100 / 55.  0.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, libndi_newtek, from 'MED-GW-01 (IO-ENC-01-NDI-01_VR)':
  Duration: N/A, start: 148649.520000, bitrate: 830976 kb/s
    Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    Stream #0:1: Video: rawvideo (UYVY / 0x59565955), uyvy422(top
first), 1920x1080 [SAR 1:1 DAR 16:9], 829440 kb/s, 25 tbr, 10000k tbn
Stream mapping:
  Stream #0:1 -> #0:0 (rawvideo (native) -> wrapped_avframe (native))
  Stream #0:0 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[decklink @ 0x2f08b00] Found Decklink mode 1920 x 1080 with rate 25.00
Output #0, decklink, to 'DeckLink Duo (1)':
  Metadata:
    encoder         : Lavf58.11.101
    Stream #0:0: Video: wrapped_avframe, uyvy422, 1920x1080 [SAR 1:1
DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.17.100 wrapped_avframe
    Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    Metadata:
      encoder         : Lavc58.17.100 pcm_s16le

frame= 2371 fps= 25 q=-0.0 size=N/A time=00:01:34.84 bitrate=N/A
dup=25 drop=0 speed=1.01x


"Progressive output" means decklink SDI output signal is 1080P at 25FPS


R,

Mustafa


On Wed, Aug 29, 2018 at 12:16 PM Carl Eugen Hoyos <ceffmpeg at gmail.com>
wrote:

> 2018-08-29 10:52 GMT+02:00, Mustafa Al Ani <mustafalani at gmail.com>:
>
> > I'm trying to output an NDI stream (1080i50) using Decklink but the
> output
> > is always progressive, my decklink setting is set to 1080i50 and the NDI
> is
> > 100% interlaced.
> >
> > I'm not using any flags in the output side because I presume it should
> take
> > the input as is, but even when I use flags like " -flags +ilme" or
> setting
> > frame rate like "-r 25000/1000" or format code "-format_code Hi50" I'm
> > still getting progressive output.
> >
> > Is this something I need to check in the Decklink SDK?
>
> Command line and complete, uncut console output missing.
>
> What does "progressive output" mean in this context?
>
> Carl Eugen
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