matiaspl

TS: VAAPI H264 to H265 transcode with deinterlacing

gst-launch-1.0 --gst-debug=2 -ev mpegtsmux name="mux"
souphttpsrc location=http://stream/url ! parsebin ! queue ! vaapih264dec ! vaapipostproc deinterlace-mode=1 deinterlace-method=4 width=1280 height=720 ! vaapih265enc rate-control=vbr bitrate=2000 keyframe-period=50 max-bframes=0 quality-level=4 ! video/x-h265,stream-format=hvc1 ! queue ! h265parse config-interval=1 ! video/x-h265,alignment=au,stream-format=byte-stream ! mux. tcpserversink host=0.0.0.0 port=1234

TS: audio transcode

gst-launch-1.0 --gst-debug=2 -ev souphttpsrc location=http://stream/url ! tsparse ! tsdemux ! queue ! flump3dec ! audioconvert ! avenc_aac ! aacparse ! mpegtsmux ! tcpserversink host=0.0.0.0 port=1234

TS: audio remux

matiaspl

You might ask why would anyone do it in the first place? Well, OBS is the only reasonable free tool for OSX for streaming but it has a flaw which makes it impossible to stream 1080p50/p60 on my i5 MacBook Pro. It works if you disable preview, but then if you can't see the video there's no reason for using OBS ;)

You need ffmpeg-dl from ffmpegdecklink brew package by AMIA Open Source (brew install ffmpegdecklink). It's worth noting that unlike brew's regular ffmpeg this one allows building ffmpeg with additional libraries (e.g. brew install ffmpegdecklink -with-srt in case you need SRT).

/usr/local/opt/ffmpegdecklink/bin/ffmpeg-dl -f decklink -i 'UltraStudio Mini Recorder' -video_input hdmi -format_code Hi50 -audio_input embedded -channels 2 -vf yadif=1 -c:v h264_videotoolbox -profile:v main -b:v 6M -pix_fmt yuv420p -color_range 1 -coder cabac -c:a aac_at -b:a 192k -f flv rtmp://your_server/app/key

What this does is capture 1080i50 signal from HDMI input (use *-vi

matiaspl

mpv --hwdec="no" --lavfi-complex="[aid1]asplit=3[sv][eb][av];[sv]showvolume=b=4:w=720:h=68[sv-v];[eb]ebur128=video=1:size=720x540:meter=18[eb-v][ao];[av]avectorscope=s=720x540:zoom=1.3:rc=2:gc=200:bc=10:rf=1:gf=8:bf=7[av-v];[sv-v][eb-v][av-v]vstack=3[1c];[vid1]split=4[v][wf][wfc][vs];[wf]waveform=m=1:d=0:r=0:c=7[wf-vus];[wf-vus][v]scale2ref=iw:1220-ih[wf-va][sig];[wf-va]setsar=1[wf-v];[wfc]waveform=m=0:d=0:r=0:c=7,scale=610x610,setsar=1[wfc-v];[vs]vectorscope=m=color3:g=color,scale=610x610,setsar=1[vs-v];[sig][wf-v]vstack[2c];[wfc-v][vs-v]vstack[3c];[1c][2c][3c]hstack=3,scale=1280:-1[vo]" rtmp://server/app/key

matiaspl

20 0.000
50 0.001
100 0.004
400 0.068
1000 0.409
2000 1.445
3000 2.761
4000 4.115
5000 5.400
6000 6.583

matiaspl

If you happen to have created a channels.conf after a lengthy scanning process using w_scan:

w_scan -f c -c PL -X -S 1 -v

(in this case a Polish DVB-C scan with SR 6875)

then you can use the following line to create your own scan table (you have to run it as root to write to /usr/share):

cut -d: -f2,3,4,5,6 channels.conf | sort -u | awk -F["/:"] '{ printf "[CHANNEL]\n\tDELIVERY_SYSTEM = DVBC/ANNEX_A\n\tFREQUENCY = %s\n\tSYMBOL_RATE =  %s\n\tINNER_FEC = %s\n\tMODULATION = %s\n\tINVERSION = %s\n\n", $1, $3, $4, $5, $2 }' > /usr/share/dvb/dvb-c/pl-Toya

matiaspl

U-Boot 2010.06 (Aug 11 2018 - 18:47:37)

Check Flash Memory Controller v100 ... Found
SPI Nor(cs 0) ID: 0xc2 0x20 0x17
Block:64KB Chip:8MB Name:"MX25L6436F"
SPI Nor total size: 8MB
Cannot found a valid SPI Nand Device
In:    serial
Out:   serial
Err:   serial

matiaspl

#!/bin/bash
fps=25
delay=2

width=640
height=360
bar_width=20
bar_height=$((height / 2))
bar_speed=4

matiaspl

Endeco's idea:

/etc/udev/rules.d/11-usb-hotplug.rules
ATTRS(idVendor)=="1edb", ATTRS(idProduct)=="be??",  RUN+="/etc/udev/atem.sh"

/etc/udev/atem.sh
echo "1edb be55" | tee /sys/bus/usb/drivers/uvcvideo/new_id
echo "1edb be49" | tee /sys/bus/usb/drivers/uvcvideo/new_id

atem mini: be49

matiaspl

C:\ffmpeg\bin>ffplay -f lavfi testsrc=s=1080x1920:r=60 -vf format=yuv444p,transpose=1,scroll=horizontal=0.005,chromashift=cbh=-50:crh=-50,extractplanes=y+u+v[y][u][v],[y][u][v]hstack

C:\ffmpeg\bin>ffmpeg -f lavfi -i colorchart=patch_size=320x320:r=60:d=10 -vf format=yuv420p,scroll=horizontal=0.005:vertical=0.005 -c:v h264 -cq 0 -f mp4 chroma_motion_patch_test_420.mp4

matiaspl

#!/bin/bash

: ${1?"Usage: $0 FPS (i.e. 25, 29.97, 60000/1001)"}

fps=$1
samplerate=48000
size=1920x1080
debug="-hide_banner"
#debug="-loglevel debug" # verbose
fontfile="UbuntuMono-R.ttf"