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• Documentation #3972 : template variants and possible bug ?

  6 juillet 2017, par Kamran Mir Hazar

  Yes, please update the documentation if it is the case.

  PS : Where can I have feature request for SPIP ?

  On Thu, Jul 6, 2017 at 2:34 PM, <redmine@spip.org> wrote :

  La demande #3972 a été mise à jour par marcimat Ÿ

• ADD Image overlay to ffmpeg video stream

  1er juillet 2017, par Chris

  I am new to ffmpeg and want to add an HUD to the video stream, so a few questions.

  1. What file do I need to edit.
  2. What do I need to do to achieve this.

  Thanks in advance. Also I am VERY new to all of this, I will need instructions step by step

  I saw other questions saying to add this : ffmpeg -n -i video.mp4 -i logo.png -filter_complex "[0:v]setsar=sar=1[v];[v][1]blend=all_mode='overlay':all_opacity=0.7" -movflags +faststart tmb/video.mp4

  But I dont know where to put it, i entered it in the terminal and got this :

  pi@raspberrypi:~ $ ffmpeg -n -i video.mp4 -i logo.png -filter_complex "[0:v]setsar=sar=1[v];[v][1]blend=all_mode='overlay':all_opacity=0.7" -movflags +faststart tmb/video.mp4
  
  ffmpeg version N-86215-gb5228e4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 4.9.2 (Raspbian 4.9.2-10)
  
    configuration: --arch=armel --target-os=linux --enable-gpl --enable-libx264 --enable-nonfree --extra-libs=-ldl
  
    libavutil      55. 63.100 / 55. 63.100
  
    libavcodec     57. 96.101 / 57. 96.101
  
    libavformat    57. 72.101 / 57. 72.101
  
    libavdevice    57.  7.100 / 57.  7.100
  
    libavfilter     6. 90.100 /  6. 90.100
  
    libswscale      4.  7.101 /  4.  7.101
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  video.mp4: No such file or directory

  I dont understand what i am supposed to do with the video.mp4 ?

  HERE IS THE SCRIPT THAT SENDS THE VIDEO.

  import subprocess
  
  import shlex
  
  import re
  
  import os
  
  import time
  
  import urllib2
  
  import platform
  
  import json
  
  import sys
  
  import base64
  
  import random
  
  
  
  
  
  import argparse
  
  
  
  parser = argparse.ArgumentParser(description='robot control')
  
  parser.add_argument('camera_id')
  
  parser.add_argument('video_device_number', default=0, type=int)
  
  parser.add_argument('--kbps', default=450, type=int)
  
  parser.add_argument('--brightness', default=75, type=int, help='camera brightness')
  
  parser.add_argument('--contrast', default=75, type=int, help='camera contrast')
  
  parser.add_argument('--saturation', default=15, type=int, help='camera saturation')
  
  parser.add_argument('--rotate180', default=False, type=bool, help='rotate image 180 degrees')
  
  parser.add_argument('--env', default="prod")
  
  
  
  
  
  
  
  args = parser.parse_args()
  
  
  
  
  
  
  
  server = "runmyrobot.com"
  
  #server = "52.52.213.92"
  
  
  
  
  
  from socketIO_client import SocketIO, LoggingNamespace
  
  
  
  # enable raspicam driver in case a raspicam is being used
  
  os.system("sudo modprobe bcm2835-v4l2")
  
  
  
  
  
  if args.env == "dev":
  
      print "using dev port 8122"
  
      port = 8122
  
  elif args.env == "prod":
  
      print "using prod port 8022"
  
      port = 8022
  
  else:
  
      print "invalid environment"
  
      sys.exit(0)
  
  
  
  
  
  print "initializing socket io"
  
  print "server:", server
  
  print "port:", port
  
  socketIO = SocketIO(server, port, LoggingNamespace)
  
  print "finished initializing socket io"
  
  
  
  #ffmpeg -f qtkit -i 0 -f mpeg1video -b 400k -r 30 -s 320x240 http://52.8.81.124:8082/hello/320/240/
  
  
  
  
  
  def onHandleCameraCommand(*args):
  
      #thread.start_new_thread(handle_command, args)
  
      print args
  
  
  
  
  
  socketIO.on('command_to_camera', onHandleCameraCommand)
  
  
  
  
  
  def onHandleTakeSnapshotCommand(*args):
  
      print "taking snapshot"
  
      inputDeviceID = streamProcessDict['device_answer']
  
      snapShot(platform.system(), inputDeviceID)
  
      with open ("snapshot.jpg", 'rb') as f:
  
          data = f.read()
  
      print "emit"
  
  
  
      socketIO.emit('snapshot', {'image':base64.b64encode(data)})
  
  
  
  socketIO.on('take_snapshot_command', onHandleTakeSnapshotCommand)
  
  
  
  
  
  def randomSleep():
  
      """A short wait is good for quick recovery, but sometimes a longer delay is needed or it will just keep trying and failing short intervals, like because the system thinks the port is still in use and every retry makes the system think it's still in use. So, this has a high likelihood of picking a short interval, but will pick a long one sometimes."""
  
  
  
      timeToWait = random.choice((0.25, 0.25, 0.25, 0.25, 0.25, 0.25, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 5))
  
      print "sleeping", timeToWait
  
      time.sleep(timeToWait)
  
  
  
  
  
  
  
  def getVideoPort():
  
  
  
  
  
      url = 'http://%s/get_video_port/%s' % (server, cameraIDAnswer)
  
  
  
  
  
      for retryNumber in range(2000):
  
          try:
  
              print "GET", url
  
              response = urllib2.urlopen(url).read()
  
              break
  
          except:
  
              print "could not open url ", url
  
              time.sleep(2)
  
  
  
      return json.loads(response)['mpeg_stream_port']
  
  
  
  def getAudioPort():
  
  
  
  
  
      url = 'http://%s/get_audio_port/%s' % (server, cameraIDAnswer)
  
  
  
  
  
      for retryNumber in range(2000):
  
          try:
  
              print "GET", url
  
              response = urllib2.urlopen(url).read()
  
              break
  
          except:
  
              print "could not open url ", url
  
              time.sleep(2)
  
  
  
      return json.loads(response)['audio_stream_port']
  
  
  
  
  
  
  
  def runFfmpeg(commandLine):
  
  
  
      print commandLine
  
      ffmpegProcess = subprocess.Popen(shlex.split(commandLine))
  
      print "command started"
  
  
  
      return ffmpegProcess
  
  
  
  
  
  
  
  def handleDarwin(deviceNumber, videoPort, audioPort):
  
  
  
  
  
      p = subprocess.Popen(["ffmpeg", "-list_devices", "true", "-f", "qtkit", "-i", "dummy"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  
  
  
      out, err = p.communicate()
  
  
  
      print err
  
  
  
      deviceAnswer = raw_input("Enter the number of the camera device for your robot from the list above: ")
  
      commandLine = 'ffmpeg -f qtkit -i %s -f mpeg1video -b 400k -r 30 -s 320x240 http://%s:%s/hello/320/240/' % (deviceAnswer, server, videoPort)
  
  
  
      process = runFfmpeg(commandLine)
  
  
  
      return {'process': process, 'device_answer': deviceAnswer}
  
  
  
  
  
  def handleLinux(deviceNumber, videoPort, audioPort):
  
  
  
      print "sleeping to give the camera time to start working"
  
      randomSleep()
  
      print "finished sleeping"
  
  
  
  
  
      #p = subprocess.Popen(["ffmpeg", "-list_devices", "true", "-f", "qtkit", "-i", "dummy"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  
      #out, err = p.communicate()
  
      #print err
  
  
  
  
  
      os.system("v4l2-ctl -c brightness={brightness} -c contrast={contrast} -c saturation={saturation}".format(brightness=args.brightness,
  
                                                                                                               contrast=args.contrast,
  
                                                                                                               saturation=args.saturation))
  
  
  
  
  
      if deviceNumber is None:
  
          deviceAnswer = raw_input("Enter the number of the camera device for your robot: ")
  
      else:
  
          deviceAnswer = str(deviceNumber)
  
  
  
  
  
      #commandLine = '/usr/local/bin/ffmpeg -s 320x240 -f video4linux2 -i /dev/video%s -f mpeg1video -b 1k -r 20 http://runmyrobot.com:%s/hello/320/240/' % (deviceAnswer, videoPort)
  
      #commandLine = '/usr/local/bin/ffmpeg -s 640x480 -f video4linux2 -i /dev/video%s -f mpeg1video -b 150k -r 20 http://%s:%s/hello/640/480/' % (deviceAnswer, server, videoPort)
  
      # For new JSMpeg
  
      #commandLine = '/usr/local/bin/ffmpeg -f v4l2 -framerate 25 -video_size 640x480 -i /dev/video%s -f mpegts -codec:v mpeg1video -s 640x480 -b:v 250k -bf 0 http://%s:%s/hello/640/480/' % (deviceAnswer, server, videoPort) # ClawDaddy
  
      #commandLine = '/usr/local/bin/ffmpeg -s 1280x720 -f video4linux2 -i /dev/video%s -f mpeg1video -b 1k -r 20 http://runmyrobot.com:%s/hello/1280/720/' % (deviceAnswer, videoPort)
  
  
  
  
  
      if args.rotate180:
  
          rotationOption = "-vf transpose=2,transpose=2"
  
      else:
  
          rotationOption = ""
  
  
  
      # video with audio
  
      videoCommandLine = '/usr/local/bin/ffmpeg -f v4l2 -framerate 25 -video_size 640x480 -i /dev/video%s %s -f mpegts -codec:v mpeg1video -s 640x480 -b:v %dk -bf 0 -muxdelay 0.001 http://%s:%s/hello/640/480/' % (deviceAnswer, rotationOption, args.kbps, server, videoPort)
  
      audioCommandLine = '/usr/local/bin/ffmpeg -f alsa -ar 44100 -ac 1 -i hw:1 -f mpegts -codec:a mp2 -b:a 32k -muxdelay 0.001 http://%s:%s/hello/640/480/' % (server, audioPort)
  
  
  
  
  
      print videoCommandLine
  
      print audioCommandLine
  
  
  
      videoProcess = runFfmpeg(videoCommandLine)
  
      audioProcess = runFfmpeg(audioCommandLine)
  
  
  
      return {'video_process': videoProcess, 'audioProcess': audioProcess, 'device_answer': deviceAnswer}
  
  
  
  
  
  
  
  def handleWindows(deviceNumber, videoPort):
  
  
  
      p = subprocess.Popen(["ffmpeg", "-list_devices", "true", "-f", "dshow", "-i", "dummy"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  
  
  
  
  
      out, err = p.communicate() 
  
      lines = err.split('\n')
  
  
  
      count = 0
  
  
  
      devices = []
  
  
  
      for line in lines:
  
  
  
          #if "]  \"" in line:
  
          #    print "line:", line
  
  
  
          m = re.search('.*\\"(.*)\\"', line)
  
          if m != None:
  
              #print line
  
              if m.group(1)[0:1] != '@':
  
                  print count, m.group(1)
  
                  devices.append(m.group(1))
  
                  count += 1
  
  
  
  
  
      if deviceNumber is None:
  
          deviceAnswer = raw_input("Enter the number of the camera device for your robot from the list above: ")
  
      else:
  
          deviceAnswer = str(deviceNumber)
  
  
  
      device = devices[int(deviceAnswer)]
  
      commandLine = 'ffmpeg -s 640x480 -f dshow -i video="%s" -f mpegts -codec:v mpeg1video -b 200k -r 20 http://%s:%s/hello/640/480/' % (device, server, videoPort)
  
  
  
  
  
      process = runFfmpeg(commandLine)
  
  
  
      return {'process': process, 'device_answer': device}
  
  
  
  
  
  
  
  def handleWindowsScreenCapture(deviceNumber, videoPort):
  
  
  
      p = subprocess.Popen(["ffmpeg", "-list_devices", "true", "-f", "dshow", "-i", "dummy"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  
  
  
  
  
      out, err = p.communicate()
  
  
  
      lines = err.split('\n')
  
  
  
      count = 0
  
  
  
      devices = []
  
  
  
      for line in lines:
  
  
  
          #if "]  \"" in line:
  
          #    print "line:", line
  
  
  
          m = re.search('.*\\"(.*)\\"', line)
  
          if m != None:
  
              #print line
  
              if m.group(1)[0:1] != '@':
  
                  print count, m.group(1)
  
                  devices.append(m.group(1))
  
                  count += 1
  
  
  
  
  
      if deviceNumber is None:
  
          deviceAnswer = raw_input("Enter the number of the camera device for your robot from the list above: ")
  
      else:
  
          deviceAnswer = str(deviceNumber)
  
  
  
  
  
  
  
      device = devices[int(deviceAnswer)]
  
      commandLine = 'ffmpeg -f dshow -i video="screen-capture-recorder" -vf "scale=640:480" -f mpeg1video -b 50k -r 20 http://%s:%s/hello/640/480/' % (server, videoPort)
  
  
  
      print "command line:", commandLine
  
  
  
      process = runFfmpeg(commandLine)
  
  
  
      return {'process': process, 'device_answer': device}
  
  
  
  
  
  
  
  
  
  def snapShot(operatingSystem, inputDeviceID, filename="snapshot.jpg"):    
  
  
  
      try:
  
          os.remove('snapshot.jpg')
  
      except:
  
          print "did not remove file"
  
  
  
      commandLineDict = {
  
          'Darwin': 'ffmpeg -y -f qtkit -i %s -vframes 1 %s' % (inputDeviceID, filename),
  
          'Linux': '/usr/local/bin/ffmpeg -y -f video4linux2 -i /dev/video%s -vframes 1 -q:v 1000 -vf scale=320:240 %s' % (inputDeviceID, filename),
  
          'Windows': 'ffmpeg -y -s 320x240 -f dshow -i video="%s" -vframes 1 %s' % (inputDeviceID, filename)}
  
  
  
      print commandLineDict[operatingSystem]
  
      os.system(commandLineDict[operatingSystem])
  
  
  
  
  
  
  
  def startVideoCapture():
  
  
  
      videoPort = getVideoPort()
  
      audioPort = getAudioPort()
  
      print "video port:", videoPort
  
      print "audio port:", audioPort
  
  
  
      #if len(sys.argv) >= 3:
  
      #    deviceNumber = sys.argv[2]
  
      #else:
  
      #    deviceNumber = None
  
      deviceNumber = args.video_device_number
  
  
  
      result = None
  
      if platform.system() == 'Darwin':
  
          result = handleDarwin(deviceNumber, videoPort, audioPort)
  
      elif platform.system() == 'Linux':
  
          result = handleLinux(deviceNumber, videoPort, audioPort)
  
      elif platform.system() == 'Windows':
  
          #result = handleWindowsScreenCapture(deviceNumber, videoPort)
  
          result = handleWindows(deviceNumber, videoPort, audioPort)
  
      else:
  
          print "unknown platform", platform.system()
  
  
  
      return result
  
  
  
  
  
  def timeInMilliseconds():
  
      return int(round(time.time() * 1000))
  
  
  
  
  
  
  
  def main():
  
  
  
      print "main"
  
  
  
      streamProcessDict = None
  
  
  
  
  
      twitterSnapCount = 0
  
  
  
      while True:
  
  
  
  
  
  
  
          socketIO.emit('send_video_status', {'send_video_process_exists': True,
  
                                              'camera_id':cameraIDAnswer})
  
  
  
  
  
          if streamProcessDict is not None:
  
              print "stopping previously running ffmpeg (needs to happen if this is not the first iteration)"
  
              streamProcessDict['process'].kill()
  
  
  
          print "starting process just to get device result" # this should be a separate function so you don't have to do this
  
          streamProcessDict = startVideoCapture()
  
          inputDeviceID = streamProcessDict['device_answer']
  
          print "stopping video capture"
  
          streamProcessDict['process'].kill()
  
  
  
          #print "sleeping"
  
          #time.sleep(3)
  
          #frameCount = int(round(time.time() * 1000))
  
  
  
          videoWithSnapshots = False
  
          while videoWithSnapshots:
  
  
  
              frameCount = timeInMilliseconds()
  
  
  
              print "taking single frame image"
  
              snapShot(platform.system(), inputDeviceID, filename="single_frame_image.jpg")
  
  
  
              with open ("single_frame_image.jpg", 'rb') as f:
  
  
  
                  # every so many frames, post a snapshot to twitter
  
                  #if frameCount % 450 == 0:
  
                  if frameCount % 6000 == 0:
  
                          data = f.read()
  
                          print "emit"
  
                          socketIO.emit('snapshot', {'frame_count':frameCount, 'image':base64.b64encode(data)})
  
                  data = f.read()
  
  
  
              print "emit"
  
              socketIO.emit('single_frame_image', {'frame_count':frameCount, 'image':base64.b64encode(data)})
  
              time.sleep(0)
  
  
  
              #frameCount += 1
  
  
  
  
  
          if False:
  
           if platform.system() != 'Windows':
  
              print "taking snapshot"
  
              snapShot(platform.system(), inputDeviceID)
  
              with open ("snapshot.jpg", 'rb') as f:
  
                  data = f.read()
  
              print "emit"
  
  
  
              # skip sending the first image because it's mostly black, maybe completely black
  
              #todo: should find out why this black image happens
  
              if twitterSnapCount > 0:
  
                  socketIO.emit('snapshot', {'image':base64.b64encode(data)})
  
  
  
  
  
  
  
  
  
          print "starting video capture"
  
          streamProcessDict = startVideoCapture()
  
  
  
  
  
          # This loop counts out a delay that occurs between twitter snapshots.
  
          # Every 50 seconds, it kills and restarts ffmpeg.
  
          # Every 40 seconds, it sends a signal to the server indicating status of processes.
  
          period = 2*60*60 # period in seconds between snaps
  
          for count in range(period):
  
              time.sleep(1)
  
  
  
              if count % 20 == 0:
  
                  socketIO.emit('send_video_status', {'send_video_process_exists': True,
  
                                                      'camera_id':cameraIDAnswer})
  
  
  
              if count % 40 == 30:
  
                  print "stopping video capture just in case it has reached a state where it's looping forever, not sending video, and not dying as a process, which can happen"
  
                  streamProcessDict['video_process'].kill()
  
                  streamProcessDict['audio_process'].kill()
  
                  time.sleep(1)
  
  
  
              if count % 80 == 75:
  
                  print "send status about this process and its child process ffmpeg"
  
                  ffmpegProcessExists = streamProcessDict['process'].poll() is None
  
                  socketIO.emit('send_video_status', {'send_video_process_exists': True,
  
                                                      'ffmpeg_process_exists': ffmpegProcessExists,
  
                                                      'camera_id':cameraIDAnswer})
  
  
  
              #if count % 190 == 180:
  
              #    print "reboot system in case the webcam is not working"
  
              #    os.system("sudo reboot")
  
  
  
              # if the video stream process dies, restart it
  
              if streamProcessDict['video_process'].poll() is not None or streamProcessDict['audio_process'].poll():
  
                  # wait before trying to start ffmpeg
  
                  print "ffmpeg process is dead, waiting before trying to restart"
  
                  randomSleep()
  
                  streamProcessDict = startVideoCapture()
  
  
  
          twitterSnapCount += 1
  
  
  
  if __name__ == "__main__":
  
  
  
  
  
      #if len(sys.argv) > 1:
  
      #    cameraIDAnswer = sys.argv[1]
  
      #else:
  
      #    cameraIDAnswer = raw_input("Enter the Camera ID for your robot, you can get it by pointing a browser to the runmyrobot server %s: " % server)
  
  
  
      cameraIDAnswer = args.camera_id
  
  
  
  
  
      main()

  ERROR :

  ffmpeg -n -f mpegts -i http://54.183.232.63:12221 -i logo.png -filter_complex "[0:v]setsar=sar=1[v];[v][1]blend=all_mode='overlay':all_opacity=0.7" -movflags +faststart tmb/video.mp4
  
  ffmpeg version N-86215-gb5228e4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 4.9.2 (Raspbian 4.9.2-10)
  
    configuration: --arch=armel --target-os=linux --enable-gpl --enable-libx264 --enable-nonfree --extra-libs=-ldl
  
    libavutil      55. 63.100 / 55. 63.100
  
    libavcodec     57. 96.101 / 57. 96.101
  
    libavformat    57. 72.101 / 57. 72.101
  
    libavdevice    57.  7.100 / 57.  7.100
  
    libavfilter     6. 90.100 /  6. 90.100
  
    libswscale      4.  7.101 /  4.  7.101
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  [mpegts @ 0x1a57390] Could not detect TS packet size, defaulting to non-FEC/DVHS
  
  http://54.183.232.63:12221: could not find codec parameters

• ffmpeg got stuck while trying to crossfade merge two videos

  30 juin 2017, par Jeflopo

  I’m trying to do a crossfade merge (1s) between two videos. An intro (39secs duration) video with the main video. When I executed the command it started working without throwing errors but at some frame ffmpeg gets stuck.

  I read a lot of q/a here in stackoverflow, and the official docs but I can’t solve this so :

  This is the command :

  ffmpeg -i "inputs/intro.mp4" -i "inputs/240p.mp4" -an -filter_complex \
  
      "[0:v]trim=start=0:end=38,setpts=PTS-STARTPTS[firstclip]; \
  
      [0:v]trim=start=38:end=39,setpts=PTS-STARTPTS[fadeoutsrc]; \
  
      [1:v]trim=start=1,setpts=PTS-STARTPTS[secondclip]; \
  
      [1:v]trim=start=0:end=1,setpts=PTS-STARTPTS[fadeinsrc]; \
  
      [fadeinsrc]format=pix_fmts=yuva420p, fade=t=in:st=0:d=1:alpha=1[fadein]; \
  
      [fadeoutsrc]format=pix_fmts=yuva420p, fade=t=out:st=0:d=1:alpha=1[fadeout]; \
  
      [fadein]fifo[fadeinfifo]; \
  
      [fadeout]fifo[fadeoutfifo]; \
  
      [fadeoutfifo][fadeinfifo]overlay[crossfade]; \
  
      [firstclip][crossfade][secondclip]concat=n=3[output]; \
  
      [0:a][1:a] acrossfade=d=1 [audio]" -vcodec libx264 -map "[output]" -map "[audio]" "outputs/240p.mp4"

  Here’s the raw command (the exact command I used) :

  ffmpeg -i "inputs/intro.mp4" -i "inputs/240p.mp4" -an -filter_complex "[0:v]trim=start=0:end=38,setpts=PTS-STARTPTS[firstclip]; [0:v]trim=start=38:end=39,setpts=PTS-STARTPTS[fadeoutsrc]; [1:v]trim=start=1,setpts=PTS-STARTPTS[secondclip]; [1:v]trim=start=0:end=1,setpts=PTS-STARTPTS[fadeinsrc]; [fadeinsrc]format=pix_fmts=yuva420p, fade=t=in:st=0:d=1:alpha=1[fadein]; [fadeoutsrc]format=pix_fmts=yuva420p, fade=t=out:st=0:d=1:alpha=1[fadeout]; [fadein]fifo[fadeinfifo]; [fadeout]fifo[fadeoutfifo]; [fadeoutfifo][fadeinfifo]overlay[crossfade]; [firstclip][crossfade][secondclip]concat=n=3[output]; [0:a][1:a] acrossfade=d=1 [audio]" -vcodec libx264 -map "[output]" -map "[audio]" "outputs/240p.mp4"

  The "error" is reproducible with and without the -an and the acrossfade filters.

  This is the output :

  PS C:\scripts\ffmpeg> ffmpeg -i "inputs/intro.mp4" -i "inputs/240p.mp4" -an -filter_complex "[0:v]trim=start=0:end=38,setpts=PTS-STARTPTS[firstclip]; [0:v]trim=start=38:end=39,setpts=PTS-STARTPTS[fadeoutsrc]; [1:v]trim=start=1,setpts=PTS-STARTPTS[secondclip]; [1:v]trim=start=0:end=1,setpts=PTS-STARTPTS[fadeinsrc]; [fadeinsrc]format=pix_fmts=yuva420p, fade=t=in:st=0:d=1:alpha=1[fadein]; [fadeoutsrc]format=pix_fmts=yuva420p, fade=t=out:st=0:d=1:alpha=1[fadeout]; [fadein]fifo[fadeinfifo]; [fadeout]fifo[fadeoutfifo]; [fadeoutfifo][fadeinfifo]overlay[crossfade]; [firstclip][crossfade][secondclip]concat=n=3[output]; [0:a][1:a] acrossfade=d=1 [audio]" -map "[output]" -map "[audio]" "outputs/240p.mp4"
  
  ffmpeg version N-86669-gc1d1274 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 7.1.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
    libavutil      55. 67.100 / 55. 67.100
  
    libavcodec     57.100.102 / 57.100.102
  
    libavformat    57. 75.100 / 57. 75.100
  
    libavdevice    57.  7.100 / 57.  7.100
  
    libavfilter     6. 94.100 /  6. 94.100
  
    libswscale      4.  7.101 /  4.  7.101
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'inputs/intro.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.72.101
  
    Duration: 00:06:24.45, start: 0.000000, bitrate: 491 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 426x240 [SAR 1:1 DAR 71:40], 353 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 130 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'inputs/240p.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.40.101
  
    Duration: 00:06:24.43, start: 0.000000, bitrate: 375 kb/s
  
      Stream #1:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 426x240 [SAR 1:1 DAR 71:40], 243 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Stream mapping:
  
    Stream #0:0 (h264) -> trim
  
    Stream #0:0 (h264) -> trim
  
    Stream #0:1 (aac) -> acrossfade:crossfade0
  
    Stream #1:0 (h264) -> trim
  
    Stream #1:0 (h264) -> trim
  
    Stream #1:1 (aac) -> acrossfade:crossfade1
  
    concat -> Stream #0:0 (libx264)
  
    acrossfade -> Stream #0:1 (aac)
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 00000000026b2240] using SAR=1/1
  
  [libx264 @ 00000000026b2240] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 00000000026b2240] profile High, level 2.1
  
  [libx264 @ 00000000026b2240] 264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=7 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'outputs/240p.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.75.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 426x240 [SAR 1:1 DAR 71:40], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        encoder         : Lavc57.100.102 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc57.100.102 aac
  
  frame=10369 fps=503 q=28.0 size=   24064kB time=00:06:55.68 bitrate= 474.2kbits/s speed=20.2x

  At frame 10000 it gets stuck... I waited for 1hour but it keeps stuck.

  I’ve updated ffmpeg :

  ffmpeg -version
  
  ffmpeg version N-86669-gc1d1274 Copyright (c) 2000-2017 the FFmpeg developers
  
  built with gcc 7.1.0 (GCC)
  
  configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
  libavutil      55. 67.100 / 55. 67.100
  
  libavcodec     57.100.102 / 57.100.102
  
  libavformat    57. 75.100 / 57. 75.100
  
  libavdevice    57.  7.100 / 57.  7.100
  
  libavfilter     6. 94.100 /  6. 94.100
  
  libswscale      4.  7.101 /  4.  7.101
  
  libswresample   2.  8.100 /  2.  8.100
  
  libpostproc    54.  6.100 / 54.  6.100

  I used these references :

  • https://www.youtube.com/watch?v=INiRu2_XdJE
  • How to use FFMPEG for a cutaway with audio crossfade ?
  • https://superuser.com/questions/778762/crossfade-between-2-videos-using-ffmpeg
  • https://ffmpeg.org/ffmpeg-filters.html#trim
  • https://ffmpeg.org/ffmpeg.html