[mythtv-users] Recording from HDMI

Jan Ceuleers jan.ceuleers at gmail.com
Thu Mar 2 17:47:40 UTC 2023


On 02/03/2023 18:18, David Watkins wrote:
> This is very interesting.  So interesting in fact that I've bought one
> of the devices to play with.
> 
> Following the instructions it was easy enough to setup, even though I'm
> a bit out of my depth with some of it.
> 
> I'm using a Windows laptop as an HDMI test source and even though the
> laptop says it's connected at 1920x1080 and the LKV admin page shows the
> input as 1920x1080, ffmpeg is showing (and capturing) a 1728x1080 video
> stream, which was a surprise.  I don't think it's a resolution I've come
> across before.
> 
> ...
> Stream #0:0[0x7d1]: Video: h264 (Constrained Baseline) ([27][0][0][0] /
> 0x001B), yuv420p(progressive), 1728x1080, 29.97 fps, 29.97 tbr, 90k tbn
> Stream #0:1[0x7d2]: Audio: mp2 ([4][0][0][0] / 0x0004), 48000 Hz,
> stereo, fltp, 192 kb/s
> ...
> 
> Any ideas why that would be?  I'd rather have 1920 x 1080.

I'm afraid I can't help much since my STBs either output 720p or 1080i,
and I went for 720p. But perhaps you could play around with the web
settings: point a browser at the device and log in with admin/123456.

Having said that I went and checked a file thus recorded, and its
resolution is 1280x720. MythTV plays it just fine. Have you tried
playing yours with MythTV?

(Note that I ran ffprobe on a recording, so ffmpeg has changed the audio
encoding on the way into the backend).

$ ffprobe /mnt/disk4/mythtv/1044_20230220205000.ts
(...)
Input #0, mpegts, from '/mnt/disk4/mythtv/1044_20230220205000.ts':
  Duration: 01:24:38.62, start: 1.400000, bitrate: 12935 kb/s
  Program 1
    Stream #0:0[0x100]: Video: h264 (Constrained Baseline)
([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720, 50 fps, 50
tbr, 90k tbn, 100 tbc
    Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000
Hz, stereo, fltp, 149 kb/s

HTH, Jan


More information about the mythtv-users mailing list