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Sur d’autres sites (7972)

  • Error using ffmpeg image2pipe with phantomjs to render video from webpage screenshots

    14 novembre 2016, par user1690179

    I am trying to use phantomjs with ffmpeg to complie videos from screenshots of a webpage as described here :
    https://groups.google.com/forum/# !msg/phantomjs/wluVGGjhL90/oGBXqh7QP44J

    I have the following test.js file :

    var page = require('webpage').create();
    

    
page.clipRect = { top: 0, left: 0, width: 900, height: 800};
    
page.viewportSize = { width: 900, height: 800};
    

    
var url = 'http://dl.dropbox.com/u/621993/voronoi/voronoi.html';
    
var frames = 100;
    

    
page.open(url, function(){
    
    setInterval(function(){
    
        page.render('/dev/stdout');
    

    
        if( frames == 0 ){
    
            phantom.exit();
    
        }
    

    
        frames--;
    

    
    }, 100);
    
});

    Then I run this command, taken from the link above :

    $ phantomjs test.js |ffmpeg -c:v png -f image2pipe -r 10 -sameq -i - -y test.mp4

    Including -sameq causes an error in ffmpeg, so I took it out and ran :

    $ phantomjs test.js |ffmpeg -c:v png -f image2pipe -r 10 -i - -y test.mp4

    I get the following output from ffmpeg :

    ffmpeg version 2.0 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Jul 22 2013 09:14:18 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
    
  configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --arch=x86_64 --enable-runtime-cpudetect
    
  libavutil      52. 38.100 / 52. 38.100
    
  libavcodec     55. 18.102 / 55. 18.102
    
  libavformat    55. 12.100 / 55. 12.100
    
  libavdevice    55.  3.100 / 55.  3.100
    
  libavfilter     3. 79.101 /  3. 79.101
    
  libswscale      2.  3.100 /  2.  3.100
    
  libswresample   0. 17.102 /  0. 17.102
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, image2pipe, from 'pipe:':
    
  Duration: N/A, bitrate: N/A
    
    Stream #0:0: Video: png, rgba, 900x800 [SAR 2835:2835 DAR 9:8], 10 fps, 10 tbr, 10 tbn, 10 tbc
    
No pixel format specified, yuv444p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 0x7f8973803800] using SAR=1/1
    
[libx264 @ 0x7f8973803800] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
[libx264 @ 0x7f8973803800] profile High 4:4:4 Predictive, level 3.1, 4:4:4 8-bit
    
[libx264 @ 0x7f8973803800] 264 - core 133 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - 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=10 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 'test.mp4':
    
  Metadata:
    
    encoder         : Lavf55.12.100
    
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv444p, 900x800 [SAR 1:1 DAR 9:8], q=-1--1, 10240 tbn, 10 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (png -> libx264)
    
pipe:: Input/output error0 size=      65kB time=00:00:04.10 bitrate= 130.5kbits/s    
    
frame=   93 fps= 15 q=-1.0 Lsize=      71kB time=00:00:09.10 bitrate=  63.8kbits/s    
    
video:69kB audio:0kB subtitle:0 global headers:0kB muxing overhead 2.696543%
    
[libx264 @ 0x7f8973803800] frame I:1     Avg QP:15.17  size: 50212
    
[libx264 @ 0x7f8973803800] frame P:24    Avg QP: 8.91  size:   575
    
[libx264 @ 0x7f8973803800] frame B:68    Avg QP: 9.69  size:    87
    
[libx264 @ 0x7f8973803800] consecutive B-frames:  2.2%  0.0%  3.2% 94.6%
    
[libx264 @ 0x7f8973803800] mb I  I16..4: 64.2% 19.6% 16.1%
    
[libx264 @ 0x7f8973803800] mb P  I16..4:  2.8%  0.2%  0.1%  P16..4:  0.5%  0.0%  0.0%  0.0%  0.0%    skip:96.3%
    
[libx264 @ 0x7f8973803800] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  3.1%  0.0%  0.0%  direct: 0.0%  skip:96.9%  L0:76.4% L1:23.6% BI: 0.0%
    
[libx264 @ 0x7f8973803800] 8x8 transform intra:13.9% inter:54.0%
    
[libx264 @ 0x7f8973803800] coded y,u,v intra: 7.4% 4.8% 5.2% inter: 0.1% 0.1% 0.1%
    
[libx264 @ 0x7f8973803800] i16 v,h,dc,p: 68% 31%  2%  0%
    
[libx264 @ 0x7f8973803800] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 48% 20% 32%  0%  0%  0%  0%  0%  0%
    
[libx264 @ 0x7f8973803800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30% 31% 20%  3%  3%  3%  5%  3%  4%
    
[libx264 @ 0x7f8973803800] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x7f8973803800] ref P L0: 91.9%  0.0%  7.4%  0.7%
    
[libx264 @ 0x7f8973803800] ref B L0: 20.5% 79.5%
    
[libx264 @ 0x7f8973803800] ref B L1: 99.9%  0.1%
    
[libx264 @ 0x7f8973803800] kb/s:60.16

    The output test.mp4 file is a blank 10 second video - just a black screen. From what i can tell, I am getting a pipe: : Input/output error from ffmpeg.

    I am pretty new to ffmpeg and I have tried changing some parameters and video codecs in the ffmpeg call, but have not found a solution yet. Can anyone advise ?

  • How to add black frames and keep the framerate ?

    3 mars 2020, par Patryk

    I have a black image from which I generate videos filled with black color only for specified lengths that I can then concatenate with my destination videos. This is how I produce it :

    ffmpeg -loop 1 -i black.png -t 00:00:00.066 \ 
    
    -c:v libx264 -pix_fmt yuv420p -vf scale=840:480,fps=15 out66ms.mp4

    with the following ffmpeg output :

    Input #0, png_pipe, from 'black.png':
    
  Duration: N/A, bitrate: N/A
    
    Stream #0:0: Video: png, rgba(pc), 608x342 [SAR 5669:5669 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x7fadf3826e00] using SAR=64/63
    
[libx264 @ 0x7fadf3826e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
[libx264 @ 0x7fadf3826e00] profile High, level 3.0
    
[libx264 @ 0x7fadf3826e00] 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=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=15 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 'out66ms.mp4':
    
  Metadata:
    
    encoder         : Lavf58.29.100
    
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 840x480 [SAR 64:63 DAR 16:9], q=-1--1, 15 fps, 15360 tbn, 15 tbc
    
    Metadata:
    
      encoder         : Lavc58.54.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
frame=    1 fps=0.0 q=27.0 Lsize=       2kB time=00:00:00.00 bitrate=201107.7kbits/s speed=0.0031x
    
video:1kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 100.984009%
    
[libx264 @ 0x7fadf3826e00] frame I:1     Avg QP:12.00  size:   123
    
[libx264 @ 0x7fadf3826e00] mb I  I16..4: 100.0%  0.0%  0.0%
    
[libx264 @ 0x7fadf3826e00] 8x8 transform intra:0.0%
    
[libx264 @ 0x7fadf3826e00] coded y,uvDC,uvAC intra: 0.0% 0.0% 0.0%
    
[libx264 @ 0x7fadf3826e00] i16 v,h,dc,p: 97%  0%  3%  0%
    
[libx264 @ 0x7fadf3826e00] i8c dc,h,v,p: 100%  0%  0%  0%
    
[libx264 @ 0x7fadf3826e00] kb/s:14.76

    I’d like to then concatenate it with videos like this one :

    ffprobe file.ts
    
Input #0, mpegts, from 'file.ts':
    
  Duration: 00:00:06.67, start: 0.000000, bitrate: 1090 kb/s
    
  Program 1
    
    Metadata:
    
      service_name    : Service01
    
      service_provider: FFmpeg
    
    Stream #0:0[0x100]: Video: h264 (Baseline) ([27][0][0][0] / 0x001B), yuv420p(progressive), 864x480, 90k tbr, 90k tbn, 180k tbc

    but as soon as I concatenate it using concat demuxer like that :

    ffmpeg -y -hide_banner \
    
    -f concat -safe 0 \
    
    -i <(echo "file '$PWD/out66ms.mp4'"; for f in dir/*.ts; do echo "file '$PWD/$f'"; done) \
    
    -c copy \
    
    output.mp

    I get this :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.29.100
    
  Duration: 00:01:41.38, start: 0.000000, bitrate: 170 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 840x480 [SAR 64:63 DAR 16:9], 170 kb/s, 2.67 fps, 2.67 tbr, 15360 tbn, 30 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler

    Which has 2.67 fps whereas not adding this empty black video to concatenation gives the following (desired 15 fps) :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.29.100
    
  Duration: 00:00:17.29, start: 0.000000, bitrate: 1001 kb/s
    
    Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 864x480, 999 kb/s, 15.62 fps, 15.58 tbr, 90k tbn, 180k tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler

    EDIT

    I’ve tried reencoding instead of copying :

    ffmpeg -y -hide_banner \
    
    -f concat -safe 0 \
    
    -i <(echo "file '$PWD/out66ms.mp4'"; for f in dir/*.ts; do echo "file '$PWD/$f'"; done) \
    
    -c:v libx264 -vf scale=840:480,fps=15 \
    
    output.mp

    But I get a similar result :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.29.100
    
  Duration: 00:01:41.00, start: 0.000000, bitrate: 555 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1680x480 [SAR 64:63 DAR 32:9], 554 kb/s, 15 fps, 15 tbr, 15360 tbn, 30 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler

    even though that the fps is set properly the video is too long and slowed down.

    How to properly add those black filled videos to preserve fps or set it to desired value ?

  • YouTube isn't recieving any data from my FFmpeg stream to the RTMP server

    9 novembre 2020, par Eniola Oyewole

    So I have a python programming running on my computer that is sending the same image to an RTMP server every second. The python program is reading the image and then sending the data, from the console everything seems ok but youtube says that its not receiving any data. My code :

    


    import subprocess
import cv2
rtmp_url = "rtmp://b.rtmp.youtube.com/live2/"

fps = 1.5

width = 600
height = 600

# command and params for ffmpeg
command = ['ffmpeg',
           '-y',
           '-f', 'rawvideo',
           '-vcodec', 'rawvideo',
           '-pix_fmt', 'bgr24',
           '-s', "{}x{}".format(width, height),
           '-r', str(fps),
           '-i', '-',
           '-c:v', 'libx264',
           '-pix_fmt', 'yuv420p',
           '-f', 'flv',
           rtmp_url]

# using subprocess and pipe to fetch frame data
p = subprocess.Popen(command, stdin=subprocess.PIPE)

while True:
  f = cv2.imread('assets/temporary.png')

  p.stdin.write(f.tobytes())


    


    My console :

    


    [rtmp @ 0x28d9940] Server response validating failed&#xA;<videocapture 0x7f60895dafb0="0x7f60895dafb0">&#xA;ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers&#xA;  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)&#xA;  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared&#xA;  libavutil      55. 78.100 / 55. 78.100&#xA;  libavcodec     57.107.100 / 57.107.100&#xA;  libavformat    57. 83.100 / 57. 83.100&#xA;  libavdevice    57. 10.100 / 57. 10.100&#xA;  libavfilter     6.107.100 /  6.107.100&#xA;  libavresample   3.  7.  0 /  3.  7.  0&#xA;  libswscale      4.  8.100 /  4.  8.100&#xA;  libswresample   2.  9.100 /  2.  9.100&#xA;  libpostproc    54.  7.100 / 54.  7.100&#xA;Input #0, rawvideo, from &#x27;pipe:&#x27;:&#xA;  Duration: N/A, start: 0.000000, bitrate: 12960 kb/s&#xA;    Stream #0:0: Video: rawvideo (BGR[24] / 0x18524742), bgr24, 600x600, 12960 kb/s, 1.50 fps, 1.50 tbr, 1.50 tbn, 1.50 tbc&#xA;Stream mapping:&#xA;  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))&#xA;[libx264 @ 0x5613ba2e3d40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2&#xA;[libx264 @ 0x5613ba2e3d40] profile High, level 2.2&#xA;[libx264 @ 0x5613ba2e3d40] 264 - core 152 r2854 e9a5903 - 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=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=1 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&#xA;Output #0, flv, to &#x27;rtmp://b.rtmp.youtube.com/live2/<key>&#x27;:&#xA;  Metadata:&#xA;    encoder         : Lavf57.83.100&#xA;    Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 600x600, q=-1--1, 1.50 fps, 1k tbn, 1.50 tbc&#xA;    Metadata:&#xA;      encoder         : Lavc57.107.100 libx264&#xA;    Side data:&#xA;      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1&#xA;frame=   55 fps=0.0 q=19.0 size=      20kB time=00:00:01.33 bit&#xA;</key></videocapture>

    &#xA;

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