Recherche avancée

Sur d’autres sites (5729)

• FFmpeg concatenate video and add watermark

  18 avril 2020, par user7356972

  I have command to overlay two video one on other.

  



  ffmpeg -i input.mp4 -vf "movie= overlay.mov [a]; [1][a]scale2ref[2nd][ref];[2nd][ref]overlay=0:0 [c]"  output.mp4 


  



  Now I want to add water watermark and concatenate a new video append.mov in above command. I have found a command to add watermark.

  



  ffmpeg -i output.mp4 -i watermark.png -filter_complex "overlay=10:10" outputwatermark.mp4


  



  But I want to merge both the command and also need to concatenate append.mov to output.mp4.

  



  Also above overlay two video command takes too long time to process if video size is large. Any suggestion on that(should not affect quality of video) ?

  



  I tried following command to concatenate video.

  



  ffmpeg -i abc.mp4 -i ../input/overlay2.mov append.mp4


  



  The video was not concatenate, below is the output.

  



  ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple clang version 11.0.0 (clang-1100.0.33.17)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'abc.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
  Duration: 00:00:37.40, start: 0.000000, bitrate: 474 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 960x540 [SAR 3:4 DAR 4:3], 324 kb/s, 1k fps, 1k tbr, 16k tbn, 2k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 69 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '../input/overlay2.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2020-03-27T16:32:23.000000Z
  Duration: 00:00:37.44, start: 0.000000, bitrate: 3519 kb/s
    Stream #1:0(eng): Video: qtrle (rle  / 0x20656C72), argb(progressive), 640x352, 3295 kb/s, SAR 1:1 DAR 20:11, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2020-03-27T16:32:23.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : Animation
      timecode        : 00:00:00:00
    Stream #1:1(eng): Data: none (tmcd / 0x64636D74) (default)
    Metadata:
      creation_time   : 2020-03-27T16:32:23.000000Z
      handler_name    : Time Code Media Handler
      timecode        : 00:00:00:00
File 'append.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x7ff35a012200] using SAR=3/4
[libx264 @ 0x7ff35a012200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7ff35a012200] profile High, level 5.2
[libx264 @ 0x7ff35a012200] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=6 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 'append.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
    Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 960x540 [SAR 3:4 DAR 4:3], q=-1--1, 1k fps, 16k tbn, 1k tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 69 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc58.54.100 aac
frame=37399 fps=378 q=-1.0 Lsize=    2138kB time=00:00:37.39 bitrate= 468.4kbits/s speed=0.378x    
video:1454kB audio:221kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 27.624002%
[libx264 @ 0x7ff35a012200] frame I:150   Avg QP:11.47  size:  1655
[libx264 @ 0x7ff35a012200] frame P:9423  Avg QP:14.43  size:    52
[libx264 @ 0x7ff35a012200] frame B:27826 Avg QP:17.67  size:    27
[libx264 @ 0x7ff35a012200] consecutive B-frames:  0.8%  0.0%  0.0% 99.2%
[libx264 @ 0x7ff35a012200] mb I  I16..4: 94.0%  4.3%  1.7%
[libx264 @ 0x7ff35a012200] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.1%  0.0%  0.0%  0.0%  0.0%    skip:99.8%
[libx264 @ 0x7ff35a012200] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.1%  0.0%  0.0%  direct: 0.0%  skip:99.9%  L0:54.5% L1:45.5% BI: 0.1%
[libx264 @ 0x7ff35a012200] 8x8 transform intra:4.8% inter:84.4%
[libx264 @ 0x7ff35a012200] coded y,uvDC,uvAC intra: 1.6% 2.3% 2.0% inter: 0.0% 0.0% 0.0%
[libx264 @ 0x7ff35a012200] i16 v,h,dc,p: 96%  0%  3%  0%
[libx264 @ 0x7ff35a012200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 58%  9% 28%  1%  1%  1%  1%  1%  1%
[libx264 @ 0x7ff35a012200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 38% 22% 15%  4%  4%  5%  5%  4%  4%
[libx264 @ 0x7ff35a012200] i8c dc,h,v,p: 97%  1%  1%  0%
[libx264 @ 0x7ff35a012200] Weighted P-Frames: Y:1.9% UV:1.9%
[libx264 @ 0x7ff35a012200] ref P L0: 86.3%  8.4%  4.5%  0.8%  0.0%
[libx264 @ 0x7ff35a012200] ref B L0: 75.4% 24.0%  0.5%
[libx264 @ 0x7ff35a012200] ref B L1: 98.1%  1.9%
[libx264 @ 0x7ff35a012200] kb/s:318.42
[aac @ 0x7ff35a013a00] Qavg: 152.336


  


• Revision 31199 : L’utilisation de document.write pouvait poser problème de temps en temps ...

  29 août 2009, par kent1@… — Log

  L’utilisation de document.write pouvait poser problème de temps en temps ... si jQuery est disponible, on utilise jQuery.getScript pour charger le script

• Encoding frames to video with ffmpeg

  5 septembre 2017, par Mher Didaryan

  I am trying to encode a video in Unreal Engine 4 with C++. I have access to the separate frames. Below is the code which reads viewport's displayed pixels and stores in buffer.

  //Safely get render target resource.
  
  FRenderTarget* RenderTarget = TextureRenderTarget->GameThread_GetRenderTargetResource();
  
  FIntPoint Size = RenderTarget->GetSizeXY();
  
  auto ImageBytes = Size.X* Size.Y * static_cast<int32>(sizeof(FColor));
  
  TArray<uint8> RawData;
  
  RawData.AddUninitialized(ImageBytes);
  
  
  
  //Get image raw data.
  
  if (!RenderTarget->ReadPixelsPtr((FColor*)RawData.GetData()))
  
  {
  
      RawData.Empty();
  
      UE_LOG(ExportRenderTargetBPFLibrary, Error, TEXT("ExportRenderTargetAsImage: Failed to get raw data."));
  
      return false;
  
  }
  
  
  
  Buffer::getInstance().add(RawData);
  
  </uint8></int32>

  Unreal Engine has IImageWrapperModule with which you can get an image from frame, but noting for video encoding. What I want is to encode frames in real time basis for live streaming service.

  I found this post Encoding a screenshot into a video using FFMPEG which is kind of what I want, but I have problems adapting this solution for my case. The code is outdated (for example avcodec_encode_video changed to avcodec_encode_video2 with different parameters).

  Bellow is the code of encoder.

  void Compressor::DoWork()
  
  {
  
  AVCodec* codec;
  
  AVCodecContext* c = NULL;
  
  //uint8_t* outbuf;
  
  //int /*i, out_size,*/ outbuf_size;
  
  
  
  UE_LOG(LogTemp, Warning, TEXT("encoding"));
  
  
  
  codec = avcodec_find_encoder(AV_CODEC_ID_MPEG1VIDEO);            // finding the H264 encoder
  
  if (!codec) {
  
      UE_LOG(LogTemp, Warning, TEXT("codec not found"));
  
      exit(1);
  
  }
  
  else UE_LOG(LogTemp, Warning, TEXT("codec found"));
  
  
  
  c = avcodec_alloc_context3(codec);
  
  c->bit_rate = 400000;
  
  c->width = 1280;                                        // resolution must be a multiple of two (1280x720),(1900x1080),(720x480)
  
  c->height = 720;
  
  c->time_base.num = 1;                                   // framerate numerator
  
  c->time_base.den = 25;                                  // framerate denominator
  
  c->gop_size = 10;                                       // emit one intra frame every ten frames
  
  c->max_b_frames = 1;                                    // maximum number of b-frames between non b-frames
  
  c->keyint_min = 1;                                      // minimum GOP size
  
  c->i_quant_factor = (float)0.71;                        // qscale factor between P and I frames
  
  //c->b_frame_strategy = 20;                               ///// find out exactly what this does
  
  c->qcompress = (float)0.6;                              ///// find out exactly what this does
  
  c->qmin = 20;                                           // minimum quantizer
  
  c->qmax = 51;                                           // maximum quantizer
  
  c->max_qdiff = 4;                                       // maximum quantizer difference between frames
  
  c->refs = 4;                                            // number of reference frames
  
  c->trellis = 1;                                         // trellis RD Quantization
  
  c->pix_fmt = AV_PIX_FMT_YUV420P;                           // universal pixel format for video encoding
  
  c->codec_id = AV_CODEC_ID_MPEG1VIDEO;
  
  c->codec_type = AVMEDIA_TYPE_VIDEO;
  
  
  
  if (avcodec_open2(c, codec, NULL) < 0) {
  
      UE_LOG(LogTemp, Warning, TEXT("could not open codec"));         // opening the codec
  
      //exit(1);
  
  }
  
  else UE_LOG(LogTemp, Warning, TEXT("codec oppened"));
  
  
  
  FString FinalFilename = FString("C:/Screen/sample.mpg");
  
  auto &PlatformFile = FPlatformFileManager::Get().GetPlatformFile();
  
  auto FileHandle = PlatformFile.OpenWrite(*FinalFilename, true);
  
  
  
  if (FileHandle)
  
  {
  
      delete FileHandle; // remove when ready
  
      UE_LOG(LogTemp, Warning, TEXT("file opened"));
  
      while (true)
  
      {
  
          UE_LOG(LogTemp, Warning, TEXT("removing from buffer"));
  
  
  
          int nbytes = avpicture_get_size(AV_PIX_FMT_YUV420P, c->width, c->height);                                      // allocating outbuffer
  
          uint8_t* outbuffer = (uint8_t*)av_malloc(nbytes * sizeof(uint8_t));
  
  
  
          AVFrame* inpic = av_frame_alloc();
  
          AVFrame* outpic = av_frame_alloc();
  
  
  
          outpic->pts = (int64_t)((float)1 * (1000.0 / ((float)(c->time_base.den))) * 90);                              // setting frame pts
  
          avpicture_fill((AVPicture*)inpic, (uint8_t*)Buffer::getInstance().remove().GetData(),
  
              AV_PIX_FMT_PAL8, c->width, c->height); // fill image with input screenshot
  
          avpicture_fill((AVPicture*)outpic, outbuffer, AV_PIX_FMT_YUV420P, c->width, c->height);                        // clear output picture for buffer copy
  
          av_image_alloc(outpic->data, outpic->linesize, c->width, c->height, c->pix_fmt, 1);
  
  
  
          /* 
  
          inpic->data[0] += inpic->linesize[0]*(screenHeight-1);                                                      
  
          // flipping frame
  
          inpic->linesize[0] = -inpic->linesize[0];                                                                   
  
          // flipping frame
  
  
  
          struct SwsContext* fooContext = sws_getContext(screenWidth, screenHeight, PIX_FMT_RGB32, c->width, c->height, PIX_FMT_YUV420P, SWS_FAST_BILINEAR, NULL, NULL, NULL);
  
          sws_scale(fooContext, inpic->data, inpic->linesize, 0, c->height, outpic->data, outpic->linesize);          // converting frame size and format
  
  
  
          out_size = avcodec_encode_video(c, outbuf, outbuf_size, outpic);                                            
  
          // save in file
  
  
  
          */
  
  
  
      }
  
      delete FileHandle;
  
  }
  
  else
  
  {
  
      UE_LOG(LogTemp, Warning, TEXT("Can't open file"));
  
  }
  
  }

  Can someone explain flipping frame part (why it’s done ?) and how to use avcodec_encode_video2 function instead of avcodec_encode_video ?