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• Merge video with ffmpeg(or alternatives) with extra properties(an overlay)

  28 juin 2021, par dconixDev

  I'll be scraping clips from twitch and merging them to create a single video file.
I already figured out the scraping of twitch clip links(but i only get 16-20 videos because i need to scroll with selenium but i dont really mind it, if you have a working solution then make an answer about it) and also the simple merging videos.

  


  I'm scraping links with :

  


  #!/usr/bin/python3.9
import bs4
import requests
import time
from datetime import datetime
from selenium import webdriver
from selenium.webdriver.firefox.options import Options

# Initialize driver and run it headless
options = Options()
options.headless = True
driver = webdriver.Firefox(options=options)

def extract_source(url):
     agent = {"User-Agent":"Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Firefox/78.0"}
     source=requests.get(url, headers=agent).text
     return source

def extract_data(source):
     soup=bs4.BeautifulSoup(source, 'html.parser')
     names=soup.find_all('a', attrs={'data-a-target':'preview-card-image-link'})
     return names

driver.get('https://www.twitch.tv/directory/game/League%20of%20Legends/clips?range=24hr')

# I wait 3 seconds for the clips to get pulled in
# I'd like here to scroll down a bit so i can scrape more clips, but even after i tried some solutions my firefox(was debugging in GUI mode, not headless as it is now) wasnt scrolling
time.sleep(3)
extract_links=extract_data(driver.page_source)
for a in extract_links:
    print(a.get('href'))

driver.quit()

# I tried scrolling using this but didnt work, not sure why
# this script is supposed to scroll until youre at the end of the page
# SCROLL_PAUSE_TIME = 0.5

# # Get scroll height
# last_height = driver.execute_script("return document.body.scrollHeight")

# for i in range(3):
    # # Scroll down to bottom
    # driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")

    # # Wait to load page
    # time.sleep(SCROLL_PAUSE_TIME)

    # # Calculate new scroll height and compare with last scroll height
    # new_height = driver.execute_script("return document.body.scrollHeight")
    # if new_height == last_height:
        # break
    # last_height = new_height


  


  I'm joining videos together after downloading(with youtube-dl) with ffmpeg :

  


  ffmpeg -safe 0 -f concat -segment_time_metadata 1 -i videos.txt -vf select=concatdec_select -af aselect=concatdec_select,aresample=async=1 out.mp4

  


  Where videos.txt is as follows :

  


  file 'video_file1.mp4'
file 'video_file2.mp4'
...


  


  I can't really find answers on how to add a watermark(different for each video, although i found this it doesnt explain how to add a unique watermark to individual videos but the same watermark to two videos) without having to render each and every video twice but doing so in one go.

  


  I think I stumbled upon some people who made their videos.txt as follows in purpose of adding extra options to each video :

  


  file 'video_file1.mp4'
option 1(for video_file1.mp4)
option 2(for video_file1.mp4)
file 'video_file2.mp4'
option 1(for video_file2.mp4)
option 2(for video_file2.mp4)
...


  


  Would this work for unique watermarks for each videos(lets suppose watermarks are named video_file1.png, ... meaning the same as the videos, also the watermark is transparent in case that needs more configuration)

  


• avfilter/vf_guided : Don't needlessly copy properties, fix potential NPD

  14 mai 2021, par Andreas Rheinhardt

  avfilter/vf_guided : Don't needlessly copy properties, fix potential NPD
  ref_frame is owned by the framesync structure and should therefore not
  
  be modified ; furthermore, these properties that are copied don't seem to
  
  be used at all, so copying is unnecessary. Finally copying when the
  
  destination frame is NULL gives a guaranteed segfault.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavfilter/vf_guided.c

• xvfb-run Could not get a valid VA display org.freedesktop.DBus.Properties.Get

  28 mars 2021, par Jintor

  When I try xvfb-run google-chrome I get error about Could not get a valid VA display

  


  Here the full command :

  


      /usr/bin/xvfb-run --listen-tcp --server-num 49 
--server-args="-ac -screen 0 1920x1080x24  -noreset" google-chrome 
--kiosk --start-maximized --test-type --no-sandbox --disable-infobars 
--disable-gpu --disable-popup-blocking --window-size=1920x1080 
--window-position=0,0 --no-first-run --ignore-certificate-errors 
--disable-dev-shm-usage --autoplay-policy=no-user-gesture-required 
--simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT' google.com


  


  the Errors

  


  [82942:82942:0327/210500.657801:ERROR:vaapi_wrapper.cc(573)] Could not get a valid VA display
[82906:83000:0327/210501.005473:ERROR:object_proxy.cc(621)] Failed to call method: org.freedesktop.DBus.Properties.Get: object_path= /org/freedesktop/UPower: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.UPower was not provided by any .service files
[82906:83000:0327/210501.005734:ERROR:object_proxy.cc(621)] Failed to call method: org.freedesktop.UPower.GetDisplayDevice: object_path= /org/freedesktop/UPower: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.UPower was not provided by any .service files
[82906:83000:0327/210501.006408:ERROR:object_proxy.cc(621)] Failed to call method: org.freedesktop.UPower.EnumerateDevices: object_path= /org/freedesktop/UPower: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.UPower was not provided by any .service files


  


  •••• What I want to to do : create a browser (server-num x) and ffmpeg -f x11grab -i 127.0.0.1:49

  


  In Centos I'm able to do it, but in other linux I get those errors

  


  Why and how to fix this ? (if this is fixable ?) (or changing attributes....)