Recherche avancée

Sur d’autres sites (7152)

• FFMPEG - Why can't i record a video for more than 10 seconds ?

  12 février 2020, par gabriel

  I’m developing a screen recorder for windows with python but for some reason i can’t record the video for more than 10 seconds.However i can record the audio for more than 10 seconds.
  Also i’m using :

  FFMPEG - to record the video with mp4 extension

  PYAUDIO - to record the sound

  TKINTER - to design the GUI

  Since the problem is with the video recording i will leave the code that i used with ffmpeg :

  """
  
  cmdGen.py generates ffmpeg commands to record your screen
  
  
  
  """
  
  import os
  
  
  
  class cmdGen:
  
      def __init__(self):
  
          self.fps = 60
  
          self.source = "desktop"
  
          self.encoder = 'mpeg4'
  
          self.hwaccel = None
  
          self.drawMouse = 1
  
          self.enableWebcam = False
  
          self.audList = 0
  
      def config(self,
  
                  fps=None,source=None,encoder=None,
  
                  hwaccel='unchanged',drawMouse=None,
  
                  webcam=None,audList=None):
  
          if fps: self.fps = fps
  
          if source: self.source = source
  
          if encoder: self.encoder = encoder
  
          if hwaccel != 'unchanged': self.hwaccel = hwaccel
  
          if drawMouse: self.drawMouse = 0 if not self.drawMouse else 1
  
          if webcam: self.enableWebcam = bool(webcam)
  
          if audList: self.audList = audList
  
      def setSource(self,isWindow,windowName=""):
  
          if not isWindow:
  
              self.source = "desktop"
  
          else:
  
              self.source = "title="+windowName
  
      def setFps(self,fps):
  
          self.fps = fps
  
      def setEncode(self,encoder):
  
          self.encoder = encoder
  
      def getCmd(self,filename):
  
          print("ACK")
  
          finalCmd = ["ffmpeg.exe","-f","gdigrab"]
  
          finalCmd.extend(['-i',self.source])
  
          finalCmd.extend(['-framerate',str(self.fps)])
  
          finalCmd.extend(['-c:v',self.encoder])
  
          if self.encoder == 'mpeg4':
  
              finalCmd.extend(['-q:v','7'])
  
          if self.hwaccel: 
  
              finalCmd.extend(['-hwaccel',self.hwaccel])
  
          finalCmd.extend(['-draw_mouse',str(self.drawMouse)])
  
          finalCmd.extend(["-y", filename])
  
          print(finalCmd)
  
          return finalCmd
  
      def getCvtCmd(self,filename):
  
              # if self.rcchecked.get():
  
              #     self.mergeProcess = subprocess.Popen(args= ["ffmpeg","-i",'tmp/tmp.mkv','-i','tmp/tmp.wav','-i','tmp/webcamtmp.mkv','-filter_complex','[2:v] scale=640:-1 [inner]; [0:0][inner] overlay=0:0 [out]',"-shortest",'-map','[out]','-y',"ScreenCaptures/"+self.filename])
  
              # else:
  
              #     self.mergeProcess = subprocess.Popen(args= ["ffmpeg","-i",'tmp/tmp.mkv','-i','tmp/tmp.wav',"-shortest",'-y',"ScreenCaptures/"+self.filename], startupinfo=startupinfo)
  
          print("ACK")
  
          finalCmd = ["ffmpeg.exe"]
  
          finalCmd.extend(['-i','tmp/tmp.mkv'])
  
          for i in range(len(self.audList)):
  
              finalCmd.extend(['-i','tmp/tmp_'+str(i)+'.wav'])
  
          if len(self.audList) > 0:
  
              finalCmd.extend(['-filter_complex','amerge=inputs='+str(len(self.audList)),'-ac',str(len(self.audList))])
  
          # finalCmd.extend(['-c:v',self.encoder])
  
          if self.enableWebcam:
  
              finalCmd.extend(['-i','tmp/webcamtmp.mkv','-filter_complex','[2:v] scale=640:-1 [inner]; [0:0][inner] '
  
                                                                          'overlay=0:0 [out]','-map','[out]'])
  
  
  
          #finalCmd.extend(['-shortest'])
  
          finalCmd.extend(["-y", filename])
  
          print(finalCmd)
  
          return finalCmd
  
  
  
  if __name__ == "__main__":
  
      cg = cmdGen()
  
      cg.setEncode("h264_nvenc")
  
      cg.setFps(60)
  
      cg.setSource(False)
  
      print(cg.getCmd("tmp"))

  Thanks guys

  Full log trying to record 1 minute :

  C:\Users\FabianoFreitas\AppData\Local\Programs\Python\Python37\python.exe C:/Users/FabianoFreitas/Desktop/PowerShare-v2.0/screenRecorder.py
  
  ACK
  
  ['ffmpeg.exe', '-f', 'gdigrab', '-i', 'desktop', '-framerate', '60', '-c:v', 'mpeg4', '-q:v', '7', '-draw_mouse', '1', '-y', 'tmp/tmp.mkv']
  
  * recording
  
  ACK
  
  ['ffmpeg.exe', '-i', 'tmp/tmp.mkv', '-i', 'tmp/tmp_0.wav', '-filter_complex', 'amerge=inputs=1', '-ac', '1', '-y', 'Videos/ScreenCapture24.mp4']
  
  * done recording
  
  ffmpeg version git-2020-02-05-e6891d1 Copyright (c) 2000-2020 the FFmpeg developers
  
    built with gcc 9.2.1 (GCC) 20200122
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  
    libavutil      56. 39.100 / 56. 39.100
  
    libavcodec     58. 67.101 / 58. 67.101
  
    libavformat    58. 37.100 / 58. 37.100
  
    libavdevice    58.  9.103 / 58.  9.103
  
    libavfilter     7. 74.100 /  7. 74.100
  
    libswscale      5.  6.100 /  5.  6.100
  
    libswresample   3.  6.100 /  3.  6.100
  
    libpostproc    55.  6.100 / 55.  6.100
  
  Input #0, matroska,webm, from 'tmp/tmp.mkv':
  
    Metadata:
  
      ENCODER         : Lavf58.37.100
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mpeg4 (Simple Profile), yuv420p, 2560x1080 [SAR 1:1 DAR 64:27], 29.97 fps, 29.97 tbr, 1k tbn, 30k tbc (default)
  
      Metadata:
  
        ENCODER         : Lavc58.67.101 mpeg4
  
  Guessed Channel Layout for Input Stream #1.0 : stereo
  
  Input #1, wav, from 'tmp/tmp_0.wav':
  
    Duration: 00:01:09.08, bitrate: 1411 kb/s
  
      Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
  
  Stream mapping:
  
    Stream #1:0 (pcm_s16le) -> amerge (graph 0)
  
    amerge (graph 0) -> Stream #0:0 (aac)
  
    Stream #0:0 -> #0:1 (mpeg4 (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [Parsed_amerge_0 @ 00000218cb4c1640] No channel layout for input 1
  
  [libx264 @ 00000218cb4acdc0] using SAR=1/1
  
  [libx264 @ 00000218cb4acdc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 00000218cb4acdc0] profile High, level 5.0, 4:2:0, 8-bit
  
  [libx264 @ 00000218cb4acdc0] 264 - core 159 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - 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=12 lookahead_threads=2 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 'Videos/ScreenCapture24.mp4':
  
    Metadata:
  
      encoder         : Lavf58.37.100
  
      Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 69 kb/s
  
      Metadata:
  
        encoder         : Lavc58.67.101 aac
  
      Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 2560x1080 [SAR 1:1 DAR 64:27], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
  
      Metadata:
  
        encoder         : Lavc58.67.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  
  [matroska,webm @ 00000218cb44af00] File ended prematurely
  
  frame=  297 fps=113 q=-1.0 Lsize=    2325kB time=00:01:09.07 bitrate= 275.8kbits/s dup=22 drop=0 speed=26.2x    
  
  video:1713kB audio:591kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.900237%
  
  [aac @ 00000218cb4ab780] Qavg: 24995.135
  
  [libx264 @ 00000218cb4acdc0] frame I:4     Avg QP:15.13  size:199596
  
  [libx264 @ 00000218cb4acdc0] frame P:85    Avg QP:21.15  size:  9466
  
  [libx264 @ 00000218cb4acdc0] frame B:208   Avg QP:24.93  size:   725
  
  [libx264 @ 00000218cb4acdc0] consecutive B-frames:  5.1%  2.7%  6.1% 86.2%
  
  [libx264 @ 00000218cb4acdc0] mb I  I16..4: 48.0% 45.3%  6.7%
  
  [libx264 @ 00000218cb4acdc0] mb P  I16..4:  1.6%  1.9%  0.8%  P16..4:  1.4%  0.4%  0.3%  0.0%  0.0%    skip:93.7%
  
  [libx264 @ 00000218cb4acdc0] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8:  3.0%  0.1%  0.0%  direct: 0.0%  skip:96.6%  L0:51.2% L1:48.3% BI: 0.6%
  
  [libx264 @ 00000218cb4acdc0] 8x8 transform intra:44.4% inter:69.1%
  
  [libx264 @ 00000218cb4acdc0] coded y,uvDC,uvAC intra: 23.8% 27.4% 19.5% inter: 0.2% 0.3% 0.1%
  
  [libx264 @ 00000218cb4acdc0] i16 v,h,dc,p: 54% 45%  1%  0%
  
  [libx264 @ 00000218cb4acdc0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 20% 41%  2%  2%  1%  2%  1%  5%
  
  [libx264 @ 00000218cb4acdc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 35% 17%  2%  3%  3%  4%  2%  4%
  
  [libx264 @ 00000218cb4acdc0] i8c dc,h,v,p: 61% 25% 11%  2%
  
  [libx264 @ 00000218cb4acdc0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 00000218cb4acdc0] ref P L0: 68.0%  6.3% 16.6%  9.1%
  
  [libx264 @ 00000218cb4acdc0] ref B L0: 70.2% 23.7%  6.1%
  
  [libx264 @ 00000218cb4acdc0] ref B L1: 91.1%  8.9%
  
  [libx264 @ 00000218cb4acdc0] kb/s:1415.80

• How to record browser animation to video, on Server/VPS

  11 novembre 2015, par Andy B

  I have one big question : How to record an animation that plays in the browser on a server/VPS ? We’re looking for a open/source or even proprietary solution.

  The use-case :

  We have an online project that generates animations and we want to record them on the server side.
  Practically it’s as simple as that, as opening a url(eg : https://greensock.com/gsap) in the browser and record the animation.

  On the local PC it works if we use ffmpeg, but we want to record the video on the server side, especially on a VPS without GUI.

  There are some solutions :

  1. Install a Lightweight GUI on the VPS, accesible through VNC

  Something like this :
  https://vpsboard.com/topic/2786-running-a-lightweight-gui-on-your-vps/

  Then create a cron job that will do the following :

  • open the browser with the correct url and play the animation
  • use ffmpeg to record the animation
  • save the video somewhere

  This solution allows a SINGLE execution thread at the same time and I don’t really like the setup.

  2. Use a fake X server

  Create/use a fake X server, tell the browser to run in there, tell ffmpeg to record that screen !?

  The question is : HOW ?

  3. Virtual Machines within the VPS

  The question is : HOW ?

  I would like to have the possibility to execute this job in a sort of container (be it docker or virtual machines within the VPS), having also the possibility to execute multiple jobs in parallel.

  Thank you all in advance !

• How to record 720p videos without dropping frames in Android

  20 novembre 2015, par user2880229

  I compiled ffmpeg and h264 libraries for android using NDK.
  I am recording videos using the muxing.c example from the ffmpeg library. Everything works correct (still haven’t worked on the audio) but the camera is dropping frames and it takes around 100ms to save each frame, which is unacceptable.

  I have also tried making a queue and saving them into another thread (let’s call it B) but at the end I need to wait for around 120 seconds because the background thread (B)is still recording the frames.

  Is there a workaround for this issue, besides reducing the video size ? Ideally I would like to save the frames in real time, at least reduce the saving time. Is it just that Android is incapable of doing this ? .