Recherche avancée

Sur d’autres sites (5299)

• FFPLAY produces black video output [closed]

  28 janvier 2020, par RooterTooter

  I’m having an issue playing videos with ffplay on an embedded arm device (imx6). The OS is based on yocto sumo and uses the meta-freescale layers for imx6.

  I have a number of test videos in different formats that I am sure are formatted correctly (They play fine on my laptop with ffplay). FFMPEG has all the necessary codecs, detects my streams, it plays audio without an issue, but the video is just black.

  It’s worth nothing that I’m running X11 and have xterm running, and when ffplay is trying to play, a black box will pop up on the screen in the correct dimensions like it thinks it’s decoding video, but it’s always blank.

  $DISPLAY=:0 ffplay test.mp4
  
  ffplay version 3.3.3 Copyright (c) 2003-2017 the FFmpeg developers
  
    built with gcc 7.3.0 (GCC)
  
    configuration: --disable-stripping --enable-pic --enable-shared --enable-pthreads --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --disable-libxcb-shape --enable-nonfree --cross-prefix=arm-poky-linux-gnueabi- --ld='arm-poky-linux-gnueabi-gcc -march=armv7-a -mfpu=neon -mfloat-abi=hard -mcpu=cortex-a9 --sysroot=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot' --cc='arm-poky-linux-gnueabi-gcc -march=armv7-a -mfpu=neon -mfloat-abi=hard -mcpu=cortex-a9 --sysroot=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot' --cxx='arm-poky-linux-gnueabi-g++ -march=armv7-a -mfpu=neon -mfloat-abi=hard -mcpu=cortex-a9 --sysroot=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot' --arch=arm --target-os=linux --enable-cross-compile --extra-cflags=' -O2 -pipe -g -feliminate-unused-debug-types -fdebug-prefix-map=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0=/usr/src/debug/ffmpeg/3.3.3-r0 -fdebug-prefix-map=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot-native= -fdebug-prefix-map=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot= -march=armv7-a -mfpu=neon -mfloat-abi=hard -mcpu=cortex-a9 --sysroot=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot' --extra-ldflags='-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed' --sysroot=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot --enable-hardcoded-tables --libdir=/usr/lib --shlibdir=/usr/lib --datadir=/usr/share/ffmpeg --disable-mipsdsp --disable-mipsdspr2 --cpu=cortex-a9 --pkg-config=pkg-config --enable-avcodec --enable-avdevice --enable-avfilter --enable-avformat --enable-avresample --enable-bzlib --enable-gpl --disable-libgsm --disable-indev=jack --disable-libvorbis --enable-lzma --disable-libmp3lame --enable-openssl --enable-postproc --disable-libschroedinger --enable-sdl2 --disable-libspeex --enable-swresample --enable-swscale --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvpx --enable-libx264 --enable-outdev=xv
  
    libavutil      55. 58.100 / 55. 58.100
  
    libavcodec     57. 89.100 / 57. 89.100
  
    libavformat    57. 71.100 / 57. 71.100
  
    libavdevice    57.  6.100 / 57.  6.100
  
    libavfilter     6. 82.100 /  6. 82.100
  
    libavresample   3.  5.  0 /  3.  5.  0
  
    libswscale      4.  6.100 /  4.  6.100
  
    libswresample   2.  7.100 /  2.  7.100
  
    libpostproc    54.  5.100 / 54.  5.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':q=    0B f=0/0   
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.20.100
  
    Duration: 00:00:30.88, start: 0.000000, bitrate: 143 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 320x180, 67 kb/s, 21.08 fps, 21.08 tbr, 16192 tbn, 42.17 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 66 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

  I’ve tried h264 and mp2 video with the same results. Has anyone seen this before

• Popen.write - operation on closed file | images to video using FFmpeg

  10 juin 2014, par f.rodrigues

  I’m trying to create a video file from images from my webcam(using SimpleCV), the images are converted to PIL format and then tostring() [rawformat]

  I’m using python subprocess and Popen to create the video using the FFmpeg.

  I can pipe the one image to the FFmpeg and make a video out of it
  But when I try to do a bunch of them I get a error :

  ValueError: I/O operation on closed file

  here’s my code.

  import subprocess as sp
  
  from SimpleCV import *
  
  from Image import Image
  
  
  
  FFMPEG_BIN = "ffmpeg.exe"
  
  
  
  img = Camera().getImage().toRGB()
  
  
  
  
  
  command = [FFMPEG_BIN, '-y',  # (optional) overwrite output file if it exists
  
             '-f', 'rawvideo', '-vcodec', 'rawvideo', '-s', '%sx%s'%(img.width,img.height),  # size of one frame
  
             '-pix_fmt', 'rgb24', '-r', '24',  # frames per second
  
             '-i', '-',  # The imput comes from a pipe
  
             '-an',  # Tells FFMPEG not to expect any audio
  
             '-vcodec', 'libx264rgb',
  
             'my_output_videofile.mp4']
  
  
  
  
  
  pipe = sp.Popen(command, stdin=sp.PIPE)#, stderr=sp.PIPE)
  
  
  
  
  
  for n in xrange(10):
  
      img = Camera().getImage().toRGB().getPIL().tostring()
  
      pipe.stdin.write(img)
  
  
  
  
  
  pipe.terminate()

  It’s wierd because the pipe.terminate() is in the end of the code, and it should close the file right away.

  EDIT :
  Removed the stderr

    ffmpeg version N-63208-gbe1fbc0 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on May 17 2014 01:30:26 with gcc 4.8.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib 
  
    --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray 
  
    --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug 
  
    --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus 
  
    --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame 
  
    --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx 
  
    --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid 
  
    --enable-decklink --enable-zlib
  
    libavutil      52. 83.100 / 52. 83.100
  
    libavcodec     55. 62.100 / 55. 62.100
  
    libavformat    55. 38.100 / 55. 38.100
  
    libavdevice    55. 13.101 / 55. 13.101
  
    libavfilter     4.  5.100 /  4.  5.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 19.100 /  0. 19.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, rawvideo, from 'pipe:':
  
    Duration: N/A, start: 0.000000, bitrate: 44236 kb/s
  
      Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240, 44236 kb/s, 24 tbr, 24 tbn, 24 tbc
  
  No pixel format specified, rgb24 for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  [libx264rgb @ 0000000000359de0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  [libx264rgb @ 0000000000359de0] profile High 4:4:4 Predictive, level 1.3, 4:4:4 8-bit
  
  [libx264rgb @ 0000000000359de0] 264 - core 142 r2431 ac76440 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - 
  
  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=24 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 'my_output_videofile.mp4':
  
    Metadata:
  
      encoder         : Lavf55.38.100
  
      Stream #0:0: Video: h264 (libx264rgb) ([33][0][0][0] / 0x0021), rgb24, 320x240, q=-1--1, 12288 tbn, 24 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo -> libx264rgb)
  
  frame=    7 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A 

• ffmpeg only processes first image

  8 septembre 2020, par Michael Price

  I have a directory of .png images (I had previously tried .jpg until I read somewhere ffmpeg prefers .png).

  


  The images share a file numbering format cof000.png - cof358.png.

  


  I want to convert those images into a moving picture format. MPG or MP4 will be fine.

  


  The command I have tried is

  


  ffmpeg.exe -framerate 25 -i cof%03d.png -r 6 output.mp4


  


  I adapted the command from this post, here :

  


  https://stackoverflow.com/questions/53778503/ffmpeg-video-slideshow-only-takes-first-image


  


  Even after trying numerous different permutations of the command the final file only has the first image in it. I am using windows.

  


  What ffmpeg command do I need to use on Windows to compile all 180 image files into a single moving image ?

  


  Here is the output from using the command :

  


  $ ffmpeg.exe -framerate 25 -i cof%03d.png -r 6 output.mp4
ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200621
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enabl
e-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enabl
e-libsrt --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-l
ibvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom
--enable-libgsm --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11
va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, image2, from 'cof%03d.png':
  Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: png, rgb24(pc), 1200x1200 [SAR 2834:2834 DAR 1:1], 25 tbr, 25 tbn, 25 tbc
File 'output.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 000001f7da6985c0] using SAR=1/1
[libx264 @ 000001f7da6985c0] using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2
[libx264 @ 000001f7da6985c0] profile High 4:4:4 Predictive, level 4.0, 4:4:4, 8-bit
[libx264 @ 000001f7da6985c0] 264 - core 160 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - 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_rang
e=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 s
liced_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=6 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbt
ree=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 'output.mp4':
  Metadata:
    encoder         : Lavf58.45.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1200x1200 [SAR 1:1 DAR 1:1], q=-1--1, 6 fps, 12288
tbn, 6 tbc
    Metadata:
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=    1 fps=0.0 q=23.0 Lsize=      26kB time=00:00:00.00 bitrate=2662518.5kbits/s speed=0.000541x
video:26kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.137195%
[libx264 @ 000001f7da6985c0] frame I:1     Avg QP:16.42  size: 25465
[libx264 @ 000001f7da6985c0] mb I  I16..4:  2.1% 85.2% 12.7%
[libx264 @ 000001f7da6985c0] 8x8 transform intra:85.2%
[libx264 @ 000001f7da6985c0] coded y,u,v intra: 9.1% 0.9% 1.0%
[libx264 @ 000001f7da6985c0] i16 v,h,dc,p: 42% 39% 19%  0%
[libx264 @ 000001f7da6985c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 11% 52%  0%  0%  0%  0%  0%  0%
[libx264 @ 000001f7da6985c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 39% 17% 13%  5%  4%  6%  6%  6%  5%
[libx264 @ 000001f7da6985c0] kb/s:1222.32