tv.sh

#!/bin/bash
cd "$(dirname "$0")"
source .qstr.bash

echo -ne "Content-Type: video/x-matroska\r\n\r\n"

if [ -f /tmp/tv.pid ]; then
    if kill -0 $(cat /tmp/tv.pid) >/dev/null 2>&1; then
        exit
    fi
fi

echo $$ > /tmp/tv.pid

export DISPLAY=:0

URL="http://localhost:9981/stream/channelnumber/${GET[vid]}?weight=50"

ffmpeg -loglevel quiet -i "${URL}" -frames 10 -c:v copy -map 0:v:0 -f matroska - 2>/dev/null | ffprobe - -show_frames -loglevel quiet > /tmp/framedata.txt 2>/dev/null || exit

IS_INTERLACED="$(grep interlaced_frame /tmp/framedata.txt | head -n 1 | sed -r 's|^.*?=||g')"
HEIGHT="$(grep height /tmp/framedata.txt | head -n 1 | sed -r 's|^.*?=||g')"

if [ "$IS_INTERLACED" == "1" ]; then
    if [ "$HEIGHT" -gt 720 ]; then
        VFILTER="-vf scale=w=trunc(oh*a/2)*2:h=min(720\,ih):interl=1,yadif=1:-1:1"
    else
        VFILTER="-vf yadif=1:-1:1,scale=w=trunc(oh*a/2)*2:h=min(720\,ih)"
    fi
else
    VFILTER="-vf scale=w=trunc(oh*a/2)*2:h=min(720\,ih)"
fi

AENCODER="-c:a libfdk_aac -ac 2 -ar 44100 -b:a 128k"
VENCODER="-c:v libx264 -preset veryfast -profile:v high -crf 22 -maxrate 5500k -bufsize 5500k"

exec ffmpeg -loglevel quiet -hwaccel vdpau -i "${URL}" $VFILTER $VENCODER $AENCODER -map 0:v:0 -map 0:a:0 -f matroska - 2>ffmpeg.log