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• Output always corrupt from FFMPEG using selenium python

  28 avril 2021, par Didit Setiawan

  i try to running testcase using selenium python and want to record video on every testacases, but when i try the output is always corrupted. FFMPEG process are running, no error appear on the output line. I attach my code, Please anyone help me is there anything i need to add or remove

  


  here's the first file, for recorder :

  


  import subprocess
from subprocess import Popen
from subprocess import call


class recorderMethod():
    videoRecording = None

    @staticmethod
    def recorder_start(res,name):
        rec_lib          = 'ffmpeg -y -rtbufsize 2000M -f dshow  -i video="screen-capture-recorder" -s '
        resolution       = res
        buffer           = ' -b:v 512k -r 20 -vcodec libx264 '
        filename         = name
        extension        = '.mp4'
        complete_command = rec_lib+resolution+buffer+filename+extension

        recorderMethod.videoRecording = Popen(str(complete_command))

    @staticmethod
    def recorder_stop():
        if recorderMethod.videoRecording.poll() is None:
            call('taskkill /F /T /PID ' + str(recorderMethod.videoRecording.pid))


  


  here's the main test file for record the video

  


  import unittest
import recorder_main
from selenium import webdriver
from time import sleep

class recordingTest(unittest.TestCase):
    #init test
    browser         = webdriver.Chrome()
    baseurl         = 'http://www.facebook.com/'
    record          = recorder_main.recorderMethod
    
    #setup
    def setUp(self):
        #declare to use browser
        self.driver = recordingTest.browser
        #make variable for easy access
        driver = self.driver
        #maximize Firefox
        driver.maximize_window()
        #go to maukerja
        driver.get(recordingTest.baseurl)

    #test001
    def test_001_record(self):
        #start recording
        recordingTest.record.recorder_start('1920x1080','Test_Sleep')
        sleep(10)
        #stop_recording
        recordingTest.record.recorder_stop()


    #teardown
    def test_999_ShutDownTest(self):
        self.driver.close()
        
if __name__ == '__main__':
    unittest.main(exit=False)


  


• avformat/dv : fix timestamps of audio packets in case of dropped corrupt audio frames

  31 octobre 2020, par Marton Balint

  avformat/dv : fix timestamps of audio packets in case of dropped corrupt audio frames
  By using the frame counter (and the video time base) for audio pts we lose some
  
  timestamp precision but we ensure that video and audio coming from the same DV
  
  frame are always in sync.
  This patch also makes timestamps after seek consistent and it should also fix
  
  the timestamps when the audio clock is unlocked and have a completely
  
  indpendent clock source. (E.g. runs on fixed 48009 Hz which should have been
  
  exact 48000 Hz)
  Fixes out of sync timestamps in ticket #8762.
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] libavformat/dv.c
  • [DH] tests/ref/seek/lavf-dv

• How to change PicOrderCntVal when decoding corrupt HEVC

  12 mai 2020, par Joe Harrison

  How can I change the PicOrderCntVal for duplicate packets ? When NAL units of type 0 or 1 are duplicated the image stay static. I'm trying to create the datamoshing blooming effect for HEVC by purposely duplicating P-frames. FFmpeg logs an error saying that duplicate POCs were found. This code is found here. My guess is that if the POC was a different number that the no error will be returned.

  



  8.3.1 of the ITU Recommendation for HEVC shows how to get the PicOrderCntVal. But what should I change for all following frames so that the decoder doesn't think there are duplicate frames ?