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• ffplay / ffmpeg with audio and video filters

  20 juillet 2018, par user10104150

  i tried to modify a already existing code for ffplay for hours, but I could not get it.
  I could not find a manual for vertical and horizontal stacking parameters. I’m always getting invalid argument errors when I try to adopt it to my needs.
  So I’m asking here for help.

  My idea is based on that : ffplay / ffmpeg setup table with audio and video filters

  The working code that I modified a little but want to modify further without luck is :

  ffplay -f lavfi \
  
           "amovie=in.mp4,asplit=3[sv][eb][av]; \
  
            [sv]showvolume=b=4:f=0:ds=log:c=VOLUME:w=720:h=68[sv-v]; \
  
            [eb]ebur128=video=1:size=720x540:meter=18[eb-v][out1]; \
  
            [av]avectorscope=s=720x540:zoom=1.3:rc=2:gc=200:bc=10:rf=1:gf=8:bf=7[av-v]; \
  
            [sv-v][eb-v][av-v]vstack=3[1c]; \
  
            movie=in.mp4,split=4[v][wf][wfc][vs]; \
  
            [wf]waveform=m=1:d=0:r=0:c=7[wf-vus]; \
  
            [wf-vus][v]scale2ref=iw:1220-ih[wf-va][sig]; \
  
            [wf-va]setsar=1[wf-v]; \
  
            [wfc]waveform=m=0:d=0:r=0:c=7,scale=610x610,setsar=1[wfc-v]; \
  
            [vs]vectorscope=m=color3:g=color,scale=610x610,setsar=1[vs-v]; \
  
            [sig][wf-v]vstack[2c]; \
  
            [wfc-v][vs-v]vstack[3c]; \
  
            [1c][2c][3c]hstack=3,scale=1920:-1[out0]"

  I’d like to change it to that style - I’m not yet allowed to post images directly in this question, so I need to link it :

  Link to image how I’d like the layout to be

  I’d like to have the video shown in 1920x1080 (keeping aspect ratio, downscale if necessary).

• ffmpeg get orientation inverted

  16 novembre 2018, par Faabass

  I getting the resolution for a video, but ffmpeg/ffprobe is getting inverted.. Always the biggest number is the width.

  I mean, it doesn’t matter if I’m getting the resolution of a vertical or horizontal video, I’m always getting for example 640x480 when it should be 480x640. Also I tried with the aspect ratio as 4:3 instead of 3:4

  ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=p=0 original.mp4

  So my question is how I can get the right resolution or at least the orientation I need to know if the video is horizontal or vertical.

  See full response :

  ffprobe -select_streams v:0 -show_entries stream=width,height -of csv=p=0 original.mp4
  
  ffprobe version N-86781-gd8f1982639-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2007-2017 the FFmpeg developers
  
    built with gcc 5.4.1 (Debian 5.4.1-11) 20170519
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-5 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg
  
    libavutil      55. 67.100 / 55. 67.100
  
    libavcodec     57.100.104 / 57.100.104
  
    libavformat    57. 75.100 / 57. 75.100
  
    libavdevice    57.  7.100 / 57.  7.100
  
    libavfilter     6. 95.100 /  6. 95.100
  
    libswscale      4.  7.101 /  4.  7.101
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x4ff7e60] sample aspect ratio already set to 1:1, ignoring 'pasp' atom (65536:65536)
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'original.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2018-11-12T22:15:04.000000Z
  
      com.android.version: 7.0
  
    Duration: 00:01:10.30, start: 0.000000, bitrate: 9497 kb/s
  
      Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt470bg/smpte170m), 1280x720, 9365 kb/s, SAR 1:1 DAR 16:9, 23.97 fps, 24 tbr, 90k tbn, 180k tbc (default)
  
      Metadata:
  
        rotate          : 270
  
        creation_time   : 2018-11-12T22:15:04.000000Z
  
        handler_name    : VideoHandle
  
      Side data:
  
        displaymatrix: rotation of 90.00 degrees
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-11-12T22:15:04.000000Z
  
        handler_name    : SoundHandle
  
  1280,720

  but this is the appearance of the video
  

• Dynamic video resolution

  4 janvier 2019, par Chen Yang

  I use ffmpeg to encode my mobile phone’s screenshot to a video. when my phone is vertical the screenshot’s resolution is 478 * 850.When horizontal the resolution is 850 * 478. Encoder could handle these image to encoded video frame, and i could play this video by ffplay correctly, i means if resolution change from 478 * 850 => 850 * 478 and it still could display full phone screen.
  But if i play this video with any other players, it only could play harf of phone screen when frame resolution change from 478 * 850 => 850 => 478.
  
  Do you guys know any video format could handle this situation？