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• AForge.Video.VideoFileWriter, Video Quality loss after a second

  29 décembre 2019, par Just another Dev

  I tried to use AForge to create mp4 video from images..but experience this quality loss after about 1 - 2 second into the video. Just wondering if anyone knows what went wrong with my code ?

  using AForge.Video.FFMPEG;
  
  VideoFileWriter writer = new VideoFileWriter();
  
  writer.Open(fileName, _width, _height, _frameRate, VideoCodec.MPEG4, 800000);
  
  var s = AForge.Imaging.Image.FromFile(@"[path]\image.jpg");
  
  int frameCount = _frameRate * scene.Time;
  
  for (int i = 0; i < frameCount; i++)
  
  {
  
      writer.WriteVideoFrame(s);
  
  }
  
  writer.Close();

  I use the above code to create a 3 second 1080p video with frame rate 60, bit rate 800k, and using this image as an example : https://www.bushandbeach.co.nz/wp-content/uploads/2019/05/A-Taste-of-Auckland-Full-Day-1-opt.jpg

  the output video is in here : https://youtu.be/j0z7711cyOM

  as you can see the image quality seems to be ok, for about 2 seconds and then it blurs out in the last second.

  Thanks so much

• FFMPEG command works on Mac but not on Windows [duplicate]

  24 décembre 2019, par Arthur

  This question is an exact duplicate of :

  • Creating video from images produces black screen video for certain image formats [duplicate]
    
    1 answer
    

  Hi I’m working on a project which needs to create animations by playing 2000 charts in 50 fps using FFMPEG, the command is :

  ffmpeg -y -framerate 50 -i img-%04d.png -vb 40M -vcodec h264 esez.mp4

  charts are located in the same folder with name as img-0001.png img-2000.png

  It worked well on my Mac. On Windows, the command can run and generate a mp4 file. But the animation is just black screen on Windows media player. I also tried open with VLC, it has some image, but not proper at all.

  log from Windows CMD :

  ffmpeg version git-2019-12-11-4110029 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9.2.1 (GCC) 20191125
  
    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. 36.101 / 56. 36.101
  
    libavcodec     58. 64.101 / 58. 64.101
  
    libavformat    58. 35.101 / 58. 35.101
  
    libavdevice    58.  9.101 / 58.  9.101
  
    libavfilter     7. 68.100 /  7. 68.100
  
    libswscale      5.  6.100 /  5.  6.100
  
    libswresample   3.  6.100 /  3.  6.100
  
    libpostproc    55.  6.100 / 55.  6.100
  
  Input #0, image2, from 'img-%04d.png':
  
    Duration: 00:00:40.18, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: png, rgba(pc), 1000x800, 50 fps, 50 tbr, 50 tbn, 50 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 00000242aaacc6c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 00000242aaacc6c0] profile High 4:4:4 Predictive, level 3.2, 4:4:4, 8-bit
  
  [libx264 @ 00000242aaacc6c0] 264 - core 158 - 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=4 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=abr mbtree=1 bitrate=40000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'esez.mp4':
  
    Metadata:
  
      encoder         : Lavf58.35.101
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1000x800, q=-1--1, 40000 kb/s, 50 fps, 12800 tbn, 50 tbc
  
      Metadata:
  
        encoder         : Lavc58.64.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/40000000 buffer size: 0 vbv_delay: N/A
  
  frame= 2009 fps= 90 q=-1.0 Lsize=    7569kB time=00:00:40.12 bitrate=1545.6kbits/s speed= 1.8x
  
  video:7545kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.322921%
  
  [libx264 @ 00000242aaacc6c0] frame I:9     Avg QP: 0.35  size: 60878
  
  [libx264 @ 00000242aaacc6c0] frame P:511   Avg QP: 0.74  size:  5275
  
  [libx264 @ 00000242aaacc6c0] frame B:1489  Avg QP: 4.35  size:  3010
  
  [libx264 @ 00000242aaacc6c0] consecutive B-frames:  0.7%  0.7%  2.2% 96.4%
  
  [libx264 @ 00000242aaacc6c0] mb I  I16..4: 85.1%  1.6% 13.3%
  
  [libx264 @ 00000242aaacc6c0] mb P  I16..4:  0.7%  0.0%  0.2%  P16..4:  1.3%  0.8%  0.4%  0.0%  0.0%    skip:96.7%
  
  [libx264 @ 00000242aaacc6c0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  1.6%  0.7%  0.2%  direct: 0.1%  skip:97.2%  L0:48.2% L1:39.0% BI:12.8%
  
  [libx264 @ 00000242aaacc6c0] final ratefactor: -35.51
  
  [libx264 @ 00000242aaacc6c0] 8x8 transform intra:2.6% inter:5.9%
  
  [libx264 @ 00000242aaacc6c0] coded y,u,v intra: 12.9% 2.5% 2.6% inter: 0.9% 0.5% 0.6%
  
  [libx264 @ 00000242aaacc6c0] i16 v,h,dc,p: 84% 14%  2%  0%
  
  [libx264 @ 00000242aaacc6c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18%  2% 77%  0%  1%  1%  0%  0%  0%
  
  [libx264 @ 00000242aaacc6c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 22% 19%  4%  4%  4%  4%  6%  2%
  
  [libx264 @ 00000242aaacc6c0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 00000242aaacc6c0] ref P L0: 60.2%  0.7% 21.4% 17.7%
  
  [libx264 @ 00000242aaacc6c0] ref B L0: 72.6% 20.2%  7.3%
  
  [libx264 @ 00000242aaacc6c0] ref B L1: 88.4% 11.6%
  
  [libx264 @ 00000242aaacc6c0] kb/s:1538.15

  Could anybody please help me with this problem ?

  Happy Holiday to all !

• Creating mosaic stack 25 videos ffmpeg windows cmd

  26 décembre 2019, par KIngking431

  Hi I am trying to make a video mosaic of 25 videos in ffmpeg

  I used Jim B’s perl script to make this script, previous on my mac it worked.
  But I can’t get it to work on my windows computer in command prompt.
  I think it executes each line of code individually

  ffmpeg \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Aarhus H 2019-12-25 15-06-03.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Aller°d 2019-10-15 17-09-32.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Ballerup St. 2019-10-19 10-58-47.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Charlottenlund.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Cph Lufthavn 2019-11-23 12-49-47.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Dyssegσrd St. 2019-10-29 19-41-17.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Ejby St. 2019-10-30 19-28-05.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Fruens B°ge St.2019-11-04 08-34-53.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Give St. 2019-11-05 12-49-39.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Hjerm St. 2019-11-13 13-40-01.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Islev St.2019-11-18 11-40-19.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Jyderup St.2019-11-19 08-18-10.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Kildebakke St 2019-11-20 20-15-20.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Lem St.2019-11-24 06-51-02.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Middelpart St 2019-11-24 19-07-51.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//N°rre Aaby St 2019-11-26 17-01-06.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Ordrup St 2019-11-28 12-10-28.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Padborg St 2019-11-28 14-05-33.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Roskilde St. 2019-12-02 11-53-34.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Snedsted St. 2019-12-06 17-06-49.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Trekroner St. 2019-12-12 20-39-38.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Ulstrup St. 2019-12-16 09-58-18.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Vojens St. 2019-12-19 12-02-10.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//Ydby St. 2019-12-25 16-55-38.mkv \
  
     -i C:/Users/Privat/Desktop/27-videoer/normalized//╪lgod St. 2019-12-23 09-36-51.mkv \
  
    -filter_complex " \
  
        [0:v] setpts=PTS-STARTPTS, scale=qqvga [a0]; \
  
        [1:v] setpts=PTS-STARTPTS, scale=qqvga [a1]; \
  
        [2:v] setpts=PTS-STARTPTS, scale=qqvga [a2]; \
  
        [3:v] setpts=PTS-STARTPTS, scale=qqvga [a3]; \
  
        [4:v] setpts=PTS-STARTPTS, scale=qqvga [a4]; \
  
        [5:v] setpts=PTS-STARTPTS, scale=qqvga [a5]; \
  
        [6:v] setpts=PTS-STARTPTS, scale=qqvga [a6]; \
  
        [7:v] setpts=PTS-STARTPTS, scale=qqvga [a7]; \
  
        [8:v] setpts=PTS-STARTPTS, scale=qqvga [a8]; \
  
        [9:v] setpts=PTS-STARTPTS, scale=qqvga [a9]; \
  
        [10:v] setpts=PTS-STARTPTS, scale=qqvga [a10]; \
  
        [11:v] setpts=PTS-STARTPTS, scale=qqvga [a11]; \
  
        [12:v] setpts=PTS-STARTPTS, scale=qqvga [a12]; \
  
        [13:v] setpts=PTS-STARTPTS, scale=qqvga [a13]; \
  
        [14:v] setpts=PTS-STARTPTS, scale=qqvga [a14]; \
  
        [15:v] setpts=PTS-STARTPTS, scale=qqvga [a15]; \
  
        [16:v] setpts=PTS-STARTPTS, scale=qqvga [a16]; \
  
        [17:v] setpts=PTS-STARTPTS, scale=qqvga [a17]; \
  
        [18:v] setpts=PTS-STARTPTS, scale=qqvga [a18]; \
  
        [19:v] setpts=PTS-STARTPTS, scale=qqvga [a19]; \
  
        [20:v] setpts=PTS-STARTPTS, scale=qqvga [a20]; \
  
        [21:v] setpts=PTS-STARTPTS, scale=qqvga [a21]; \
  
        [22:v] setpts=PTS-STARTPTS, scale=qqvga [a22]; \
  
        [23:v] setpts=PTS-STARTPTS, scale=qqvga [a23]; \
  
        [24:v] setpts=PTS-STARTPTS, scale=qqvga [a24]; \
  
        [a0][a1][a2][a3][a4][a5][a6][a7][a8][a9][a10][a11][a12][a13][a14][a15][a16][a17][a18][a19][a20][a21][a22][a23][a24]xstack=inputs=25:layout=0_0|w0_0|w0+w1_0|w0+w1+w2_0|w0+w1+w2+w3_0|0_h0|w0_h0|w0+w1_h0|w0+w1+w2_h0|w0+w1+w2+w3_h0|0_h0+h1|w0_h0+h1|w0+w1_h0+h1|w0+w1+w2_h0+h1|w0+w1+w2+w3_h0+h1|0_h0+h1+h2|w0_h0+h1+h2|w0+w1_h0+h1+h2|w0+w1+w2_h0+h1+h2|w0+w1+w2+w3_h0+h1+h2|0_h0+h1+h2+h3|w0_h0+h1+h2+h3|w0+w1_h0+h1+h2+h3|w0+w1+w2_h0+h1+h2+h3|w0+w1+w2+w3_h0+h1+h2+h3[out] \
  
        " \
  
      -map "[out]" \
  
      -c:v libx264 -t '30' -f matroska -  | ffplay -autoexit -left 10 -top 10  -

  I tried making powershell scripts for this but with no luck, I also tried to run it in the bash implemented in cmd.
  Is there something fundamental about commandprompt I am missing ?