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• ffmpeg overlay not showing on first frame

  5 mai 2016, par Nic Wilson

  I’m trying to use ffmpeg to overlay a 720x720 video (previd.mp4) onto a background image (bg.jpg). I have it working except that the first frame of the video that is created shows the background only for a frame before the overlay video is shown on top of it.

  This is what I’m using to create the video and overlay :

  ffmpeg -loop 1 -i bg.jpg -i previd.mp4 -filter_complex "[1:v]scale=-1:1080[a]; [0:v][a]overlay=(main_w/2)-(overlay_w/2):0:shortest=1[video]" -map "[video]" -map 1:a -codec:a copy vid.mp4
  
  
  
  ffmpeg version 3.0.2-tessus Copyright (c) 2000-2016 the FFmpeg developers
  
    built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
  
    configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --as=yasm --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzmq --enable-version3 --disable-ffplay --disable-indev=qtkit --disable-indev=x11grab_xcb
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [mjpeg @ 0x7fa934808600] Changing bps to 8
  
  Input #0, image2, from 'bg.jpg':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: 16835 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'previd_2_0.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf57.25.100
  
    Duration: 00:00:06.57, start: 0.023220, bitrate: 1395 kb/s
  
      Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x720, 1261 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 131 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  [swscaler @ 0x7fa93400b000] deprecated pixel format used, make sure you did set range correctly
  
  [libx264 @ 0x7fa934001200] using SAR=1/1
  
  [libx264 @ 0x7fa934001200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x7fa934001200] profile High, level 4.0
  
  [libx264 @ 0x7fa934001200] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - 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=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 'vid0.mp4':
  
    Metadata:
  
      encoder         : Lavf57.25.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        encoder         : Lavc57.24.102 libx264
  
      Side data:
  
        unknown side data type 10 (24 bytes)
  
      Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, 131 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Stream mapping:
  
    Stream #0:0 (mjpeg) -> overlay:main
  
    Stream #1:0 (h264) -> scale
  
    overlay -> Stream #0:0 (libx264)
  
    Stream #1:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=   26 fps=0.0 q=0.0 size=       0kB time=00:00:01.32 bitrate=   0.3kbits/sframe=   49 fps= 48 q=0.0 size=       0kB time=00:00:02.20 bitrate=   0.2kbits/sframe=   69 fps= 45 q=28.0 size=     146kB time=00:00:03.01 bitrate= 396.3kbits/frame=   92 fps= 45 q=28.0 size=     315kB time=00:00:03.94 bitrate= 654.7kbits/frame=  115 fps= 45 q=28.0 size=     514kB time=00:00:04.87 bitrate= 863.3kbits/frame=  137 fps= 45 q=28.0 size=     677kB time=00:00:05.73 bitrate= 966.9kbits/frame=  155 fps= 43 q=28.0 size=     831kB time=00:00:06.50 bitrate=1046.8kbits/frame=  164 fps= 34 q=-1.0 Lsize=    1812kB time=00:00:06.57 bitrate=2259.0kbits/s speed=1.35x    
  
  video:1700kB audio:106kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.344859%
  
  [libx264 @ 0x7fa934001200] frame I:1     Avg QP:20.13  size: 36046
  
  [libx264 @ 0x7fa934001200] frame P:91    Avg QP:24.37  size: 15003
  
  [libx264 @ 0x7fa934001200] frame B:72    Avg QP:24.43  size:  4709
  
  [libx264 @ 0x7fa934001200] consecutive B-frames: 38.4%  8.5%  1.8% 51.2%
  
  [libx264 @ 0x7fa934001200] mb I  I16..4: 30.2% 67.1%  2.7%
  
  [libx264 @ 0x7fa934001200] mb P  I16..4:  8.6% 17.6%  0.8%  P16..4: 16.6%  3.1%  0.9%  0.0%  0.0%    skip:52.3%
  
  [libx264 @ 0x7fa934001200] mb B  I16..4:  0.7%  1.3%  0.1%  B16..8: 21.3%  1.2%  0.1%  direct: 0.7%  skip:74.7%  L0:44.5% L1:54.2% BI: 1.4%
  
  [libx264 @ 0x7fa934001200] 8x8 transform intra:65.0% inter:93.5%
  
  [libx264 @ 0x7fa934001200] coded y,uvDC,uvAC intra: 32.3% 45.6% 4.6% inter: 4.3% 8.5% 0.0%
  
  [libx264 @ 0x7fa934001200] i16 v,h,dc,p: 30% 30%  5% 35%
  
  [libx264 @ 0x7fa934001200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 25% 14%  4%  5%  5%  5%  5%  4%
  
  [libx264 @ 0x7fa934001200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 27% 11%  3%  7%  5%  5%  3%  2%
  
  [libx264 @ 0x7fa934001200] i8c dc,h,v,p: 52% 20% 22%  6%
  
  [libx264 @ 0x7fa934001200] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x7fa934001200] ref P L0: 74.9%  8.3% 12.6%  4.2%
  
  [libx264 @ 0x7fa934001200] ref B L0: 92.4%  6.8%  0.9%
  
  [libx264 @ 0x7fa934001200] ref B L1: 97.5%  2.5%
  
  [libx264 @ 0x7fa934001200] kb/s:2122.37

• FFMPEG resizes processed video

  15 septembre 2021, par Peter Mark Friedladner

  I have this simple code, whcih compresses videos to mp4. Everythign works well but when looking at the final video, it is upscaled higher. Example would be an original video file of 1920 × 1080 turns out to be 4096 × 2160. I do not want this to happen, instead if FFMPEG finds a video of 720x1080,1920x180 etc.. it should keep the original video size, and not alter. Any help would be appreciated.

  


  #find . \( -name "*.mov" -o -name "*.MOV" \);
#do echo $i; done
for i in $(find . -name '*.mov' -or -name '*.MOV'); do 
ffmpeg -i "$i" "${i%.*}.mp4";
rm "$i"
done


  


• Multiple outputs from same source

  28 septembre 2021, par Christian R

  How do I modify this ffmpeg string to generate multiple outputs with different video bitrates ?
This to save time when yadif=1 take a lot of power. Also, can't get it to accept yadif_cuda in windows.

  


  ffmpeg -y -f lavfi -i anullsrc=cl=mono:sample_rate=48000 -i "test.mxf" -vf yadif=1 -s 1920:1080 -c:v h264_nvenc -force_key_frames "expr:gte(t,n_forced*10)" -pix_fmt yuv420p -preset slow -rc vbr_hq -b:v 4.5M -map 1:v -map 0:a -c:a aac -b:a 192k -shortest "test.mp4"