Recherche avancée

Sur d’autres sites (5469)

• Combine 2 .FLV videos

  4 décembre 2015, par Rune

  For the last 4 hours I’ve been trying to combine 2 .flv files into one using ffmpeg (or well, just C# in general).

  Here’s what I got so far :
  I’ve converted both the videos to .mp4 videos :

  "-i " + videoFileLocation + " -c copy -copyts " + newConvertedFileLocation

  I have then combined the two .mp4 files into a single one using :
  (txtPath is the text file with the two mp4 file locations)

  "-f concat -i " + txtPath + " -c copy " + saveLocation

  This ends up with an mp4 file which contains the combination of both the videos BUT with the following fault :

  The length of the first video is 0:05

  The length of the second video is 6:11

  However the length of the combined video is for some reason 07:51 - thus the video runs at a slower pace than it should.

  Furthermore the audio is async with the video.

  What am I doing wrong here ?

  I haven’t used ffmpeg before and I just wanna get this working.

  Any help is greatly appreciated !

  As requested here is the output from running ’ffmpeg -i input1.flv -i input2.flv’ :

  ffmpeg version 2.7 Copyright (c) 2000-2015 the FFmpeg developers   built with gcc 4.9.2 (GCC)...
  
  
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'filepath\input1.flv':   Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 1970-01-01 00:00:00
  
      encoder         : Lavf53.24.2   Duration: 00:00:05.31, start: 0.000000, bitrate: 1589 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1205 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 384 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01 00:00:00
  
        handler_name    : SoundHandler Input #1, flv, from 'filepath\input2.flv':   Metadata:
  
      audiosize       : 4476626
  
      canSeekToEnd    : true
  
      datasize        : 23876671
  
      videosize       : 19004263
  
      hasAudio        : true
  
      hasCuePoints    : false
  
      hasKeyframes    : true
  
      hasMetadata     : true
  
      hasVideo        : true
  
      lasttimestamp   : 372
  
      metadatacreator : flvtool++ (Facebook, Motion project, dweatherford)
  
      totalframes     : 9298
  
      encoder         : Lavf56.36.100   Duration: 00:06:11.92, start: 0.080000, bitrate: 513 kb/s
  
      Stream #1:0: Video: h264 (High), yuv420p, 646x364 [SAR 1:1 DAR 323:182], 400 kb/s, 25 fps, 25 tbr, 1k tbn, 50 tbc
  
      Stream #1:1: Audio: aac (LC), 44100 Hz, stereo, fltp, 96 kb/s At least one output file must be specified

• avcodec/v210dec : add support for frame and slice threading

  25 novembre 2019, par Limin Wang

  avcodec/v210dec : add support for frame and slice threading
  1, Test server configure :
  
  [root@localhost ]# cat /proc/cpuinfo  |grep "model name"
  
   model name : Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz
  
   model name : Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz
  
   ...
  [root@localhost ]# free -h
  
                total        used        free      shared  buff/cache   available
  
                Mem :           102G        1.1G        100G         16M        657M        100G
  
                Swap :          4.0G          0B        4.0G
  2, Test result :
  
  encode the v210 input data for testing :
  
  ./ffmpeg -y -i 4k_422.ts  -c:v v210 -vframes 10 test.avi
  master :
  
  ./ffmpeg -y -threads 1 -stream_loop 1000 -i ./test.avi -benchmark -f null -
  
  frame=10010 fps= 60 q=-0.0 Lsize=N/A time=00:38:26.30 bitrate=N/A speed=13.7x
  
  video:5240kB audio:432432kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : unknown
  
  bench : utime=101.869s stime=66.181s rtime=167.996s
  
  bench : maxrss=186552kB
  patch applied :
  
  ./ffmpeg -y -threads 2 -thread_type slice -stream_loop 1000 -i ./test.avi -benchmark -f null -
  
  frame=10010 fps= 72 q=-0.0 Lsize=N/A time=00:38:26.30 bitrate=N/A speed=16.5x
  
  video:5240kB audio:432432kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : unknown
  
  bench : utime=103.562s stime=74.858s rtime=139.599s
  
  bench : maxrss=188616kB
  ./ffmpeg -y -threads 2 -thread_type frame -stream_loop 1000 -i ./test.avi -benchmark -f null -
  
  frame=10010 fps= 85 q=-0.0 Lsize=N/A time=00:38:26.30 bitrate=N/A speed=19.6x
  
  video:5240kB audio:432432kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : unknown
  
  bench : utime=114.310s stime=92.685s rtime=117.693s
  
  bench : maxrss=231896kB
  Signed-off-by : Limin Wang <lance.lmwang@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/v210dec.c
  • [DH] libavcodec/v210dec.h

• 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)