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• avcodec/qdmc : Check input space in qdmc_get_vlc()

  10 octobre 2019, par Michael Niedermayer

  avcodec/qdmc : Check input space in qdmc_get_vlc()
  Fixes : Timeout (125sec -> 0.4sec)
  
  Fixes : 18059/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QDMC_fuzzer-5656195825664000
  Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
  
  Reviewed-by : Paul B Mahol <onemda@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/qdmc.c

• FFmpeg - Crop image white space

  15 juin 2020, par Pier Giorgio Misley

  I'm looking for a way, with FFmpeg, to crop an image removing all white pixels ; something like the Photoshop's "crop white spaces".

  



  I tried looking around but I didn't find a solution, here is an example of what I'm looking for :

  



  Given this :


  



  I would be able to obtain this :


  



  How should I get this edit ?

  


• ffmpeg : audio + image to video : reduce time and space it takes

  9 septembre 2019, par Yashasvi

  I am using FFMPEG to convert an image and an audio to a video.

  I am able to achieve the final video using the following command (Attaching the output of the command too) :

  time ffmpeg -loop 1 -i inputImage.jpg -i inputAudio.mp3 -c:v libx264 -
  
  c:a copy -shortest output1.mp4
  
  ffmpeg version 4.1.3-0york1~16.04 Copyright (c) 2000-2019 the FFmpeg 
  
  developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.11) 20160609
  
    configuration: --prefix=/usr --extra-version='0york1~16.04' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-nonfree --enable-libfdk-aac --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  Input #0, image2, from 'inputImage.jpg':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: 32003 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 4160x2340 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  [mp3 @ 0x55cd4bed0f80] Estimating duration from bitrate, this may be inaccurate
  
  Input #1, mp3, from 'inputAudio.mp3':
  
    Duration: 00:00:23.77, start: 0.000000, bitrate: 127 kb/s
  
      Stream #1:0: Audio: mp3, 44100 Hz, mono, fltp, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x55cd4bee9c80] using SAR=1/1
  
  [libx264 @ 0x55cd4bee9c80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x55cd4bee9c80] profile High, level 6.0
  
  [libx264 @ 0x55cd4bee9c80] 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=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=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 'output1.mp4':
  
    Metadata:
  
      encoder         : Lavf58.20.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuvj420p(pc), 4160x2340 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc58.35.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: mp3 (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 128 kb/s
  
  frame=  647 fps= 21 q=28.0 Lsize=    1302kB time=00:00:23.76 bitrate= 449.0kbits/s speed=0.778x    
  
  video:908kB audio:371kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.797463%
  
  [libx264 @ 0x55cd4bee9c80] frame I:3     Avg QP:12.36  size:235361
  
  [libx264 @ 0x55cd4bee9c80] frame P:163   Avg QP:17.66  size:   469
  
  [libx264 @ 0x55cd4bee9c80] frame B:481   Avg QP:20.95  size:   336
  
  [libx264 @ 0x55cd4bee9c80] consecutive B-frames:  0.8%  0.3%  0.0% 98.9%
  
  [libx264 @ 0x55cd4bee9c80] mb I  I16..4: 60.6% 37.5%  1.9%
  
  [libx264 @ 0x55cd4bee9c80] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.3%  0.0%  0.0%  0.0%  0.0%    skip:99.7%
  
  [libx264 @ 0x55cd4bee9c80] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.2%  0.0%  0.0%  direct: 0.0%  skip:99.8%  L0:46.7% L1:53.3% BI: 0.0%
  
  [libx264 @ 0x55cd4bee9c80] 8x8 transform intra:36.9% inter:94.7%
  
  [libx264 @ 0x55cd4bee9c80] coded y,uvDC,uvAC intra: 29.0% 60.8% 5.5% inter: 0.0% 0.1% 0.0%
  
  [libx264 @ 0x55cd4bee9c80] i16 v,h,dc,p: 19% 67% 14%  0%
  
  [libx264 @ 0x55cd4bee9c80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  8% 42% 41%  1%  0%  0%  0%  0%  8%
  
  [libx264 @ 0x55cd4bee9c80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 60%  5%  0%  0%  0%  0%  0%  0%
  
  [libx264 @ 0x55cd4bee9c80] i8c dc,h,v,p: 24% 56% 16%  5%
  
  [libx264 @ 0x55cd4bee9c80] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 0x55cd4bee9c80] ref P L0: 96.2%  0.0%  1.8%  2.0%
  
  [libx264 @ 0x55cd4bee9c80] ref B L0: 87.7%  8.6%  3.7%
  
  [libx264 @ 0x55cd4bee9c80] ref B L1: 98.5%  1.5%
  
  [libx264 @ 0x55cd4bee9c80] kb/s:291.81
  
  
  
  real    0m30.671s
  
  user    1m50.724s
  
  sys 0m0.348s

  Here are the respected sizes of inputs and output :

  inputImage.jpg : 160kb

  inputAudio.mp3 : 380.3kb

  output1.mp4 : 1.3MB

  The size of output video is pretty large as compared to the input audio. This is my first issue.

  Secondly, as you can see, this process takes 30sec, which is too much I think.

  How do I solve this two problems ?

  • reducing the output video file size

  • reducing the time this process takes.

  I’ve gone through numerous online links, including a lot of questions on this forum for the past several hours but still not able to solve this.
  Tried playing with framerate but disturbs the duration of the output video.

  Can someone please help here. Let me know if any other information is needed.

  1 thing that helped me reduce the size of final video from 3MB to 1.2MB was to compress the image that I am using.