如视频所示， 我可以下载打开 fb 直播之前的 15 分钟剧情 (从少林足球比赛进行中， 倒退 15 分钟 ， 能看到刚刚开始集合的剧情。)
有时你打开直播， miss 掉之前重要的画面， 直播后也可能被隐藏或删除, 所以这招很有用。
Bash代码:
# rf: https://stackoverflow.com/questions/12498304/using-bash-to-display-a-progress-working-indicator
progressBarWidth=20
# Function to draw progress bar
progressBar () {
taskCount="$1"
tasksDone="$2"
# Calculate number of fill/empty slots in the bar
progress=$(echo "$progressBarWidth/$taskCount*$tasksDone" | bc -l)
fill=$(printf "%.0f\n" $progress)
if [ $fill -gt $progressBarWidth ]; then
fill=$progressBarWidth
fi
empty=$(($fill-$progressBarWidth))
# Percentage Calculation
percent=$(echo "100/$taskCount*$tasksDone" | bc -l)
percent=$(printf "%0.2f\n" $percent)
if [ $(echo "$percent>100" | bc) -gt 0 ]; then
percent="100.00"
fi
# Output to screen
printf "\r["
printf "%${fill}s" '' | tr ' ' '#'
printf "%${empty}s" '' | tr ' ' ' '
printf "] $percent%% - $text "
}
fb_live_backward ()
{
echo lili;
##no nid care if `firefox -no-remote -ProfileManager` then create lolo.default collision, overkill
cookie_f='/tmp/fb_cookie';
printf ".mode tabs \n
select host, case when host glob '.*' then 'TRUE' else 'FALSE' end, path, case when isSecure then 'TRUE' else 'FALSE' end, expiry, name, value
from moz_cookies where host = '.facebook.com';" | sqlite3 ~/.mozilla/firefox/*.default/cookies.sqlite > "$cookie_f";
echo "$cookie_f";
#echo > "$cookie_f";
#curl -b "$cookie_f" -vLk "https://www.facebook.com/video/playback/playlist.m3u8?v=$vid" -H 'Host: www.facebook.com' -H 'User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0' -H 'Accept: */*' -H 'Accept-Language: en-US,en;q=0.5' --compressed -H 'Referer: https://www.facebook.com/live' -H 'Connection: keep-alive'
#curl -b "$cookie_f" -vLk 'https://video.fkul8-1.fna.fbcdn.net/hvideo-prn1/v/rvgvfRr3mfgtrG9-5YYe0/live-md/320741391732419.m3u8?_nc_rl=AfACJUPO37BnG6-k&oh=ca49b289cfe55cc22554f06974a11197&oe=597BC9DD'
vid="$1";
url="$(curl -b "$cookie_f" -s "https://www.facebook.com/video/playback/playlist.m3u8?v=$vid" -H 'Host: www.facebook.com' -H 'User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0' -H 'Accept: */*' -H 'Accept-Language: en-US,en;q=0.5' --compressed -H 'Referer: https://www.facebook.com/live' -H 'Connection: keep-alive' | tail -1)";
if [[ $url != http* ]]; then
echo "url failed";
else
curl -b "$cookie_f" -s "$url" | awk '/^#EXTINF/,/ts$/' > /tmp/tss;
awk 'NR==2' /tmp/tss > /tmp/ts;
awk 'NR==1 {first = $0} END {print}' /tmp/tss > /tmp/ts2;
endI2="$(awk 'NR > 1 {print $1}' RS='__-' FS='.ts' /tmp/ts2 | tail -1)";
endI="$(awk 'NR > 1 {print $1}' RS='__-' FS='.ts' /tmp/ts | tail -1)";
echo '###';
echo "$endI";
echo "$endI2";
echo '#####';
if [[ -z "$endI" || -z "$endI2" ]]; then
echo "Abort.";
else
startI=$(($endI - 300)); #Backward up to 15 minutes * 60 seconds
if [ "$startI" -lt "0" ]; then
startI=0;
fi;
fi;
furl="$(awk -F'__-' '{print $1}' /tmp/ts)";
startURL="${url%/*}";
endURL="$(echo "${url##*/}" | awk -F? '{print $NF}')";
rm /tmp/$vid.mp4 2> /dev/null;
for n in `seq "$startI" "$endI2"`;
do
text=$(echo "Saving to /tmp/$vid.mp4 ..." `ls -lah /tmp/$vid.mp4 2>/dev/null | awk -F " " {'print $5'}` );
progressBar $(($endI2 - $startI)) $(($n - $startI)) "$text";
curl -b "$cookie_f" -s "$startURL"'/'"$furl"'__-'"$n"'.ts?'"$endURL" -H 'User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0' -H 'Accept: */*' -H 'Accept-Language: en-US,en;q=0.5' --compressed -H 'Referer: https://www.facebook.com/live' -H 'Connection: keep-alive' >> /tmp/$vid.mp4;
done;
echo "Download completed :)";
fi
}
虽然这 2017 年的招已经 deprecated， 我也没时间研究 fb 新招， 不过希望可以带给你一点 idea 关于倒退直播的可能性 :D
至于 Android 版本， either nougat 和 lollipop 都中， 手头上没 marshmallow test 不过理论上应该一样中。
