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• Superimposing two videos onto a static image ?

  15 décembre 2014, par Archagon

  I have two videos that I’d like to combine into a single video, in which both videos would sit on top of a static background image. (Think something like this.) My requirements are that the software I use is free, that it runs on OSX, and that I don’t have to re-encode my videos an excessive number of times. I’d also like to be able to perform this operation from the command line or via script, since I’ll be doing it a lot. (But this isn’t strictly necessary.)

  I tried fiddling with ffmpeg for a couple of hours, but it just doesn’t seem very well suited for post-processing. I could potentially hack something together via the overlay feature, but so far I haven’t figured out how to do it, aside from pain-stakingly converting the image to a video (which takes 2x as long as the length of my videos !) and then superimposing the two videos onto it in another rendering step.

  Any tips ? Thank you !

  ---

  Update :

  Thanks to LordNeckbeard’s help, I was able to achieve my desired result with a single ffmpeg call ! Unfortunately, encoding is quite slow, taking 6 seconds to encode 1 second of video. I believe this is caused by the background image. Any tips on speeding up encoding ? Here’s the ffmpeg log :

  MacBook-Pro:Video archagon$ ffmpeg -loop 1 -i underlay.png -i test-slide-video-short.flv -i test-speaker-video-short.flv -filter_complex "[1:0]scale=400:-1[a];[2:0]scale=320:-1[b];[0:0][a]overlay=0:0[c];[c][b]overlay=0:0" -shortest -t 5 -an output.mp4
  
  ffmpeg version 1.0 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Nov 14 2012 16:18:58 with Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn)
  
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
  
    libavutil      51. 73.101 / 51. 73.101
  
    libavcodec     54. 59.100 / 54. 59.100
  
    libavformat    54. 29.104 / 54. 29.104
  
    libavdevice    54.  2.101 / 54.  2.101
  
    libavfilter     3. 17.100 /  3. 17.100
  
    libswscale      2.  1.101 /  2.  1.101
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, image2, from 'underlay.png':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: png, rgb24, 1024x768, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Input #1, flv, from 'test-slide-video-short.flv':
  
    Metadata:
  
      author          : 
  
      copyright       : 
  
      description     : 
  
      keywords        : 
  
      rating          : 
  
      title           : 
  
      presetname      : Custom
  
      videodevice     : VGA2USB Pro V3U30343
  
      videokeyframe_frequency: 5
  
      canSeekToEnd    : false
  
      createdby       : FMS 3.5
  
      creationdate    : Mon Aug 16 16:35:34 2010
  
      encoder         : Lavf54.29.104
  
    Duration: 00:50:32.75, start: 0.000000, bitrate: 90 kb/s
  
      Stream #1:0: Video: vp6f, yuv420p, 640x480, 153 kb/s, 8 tbr, 1k tbn, 1k tbc
  
  Input #2, flv, from 'test-speaker-video-short.flv':
  
    Metadata:
  
      author          : 
  
      copyright       : 
  
      description     : 
  
      keywords        : 
  
      rating          : 
  
      title           : 
  
      presetname      : Custom
  
      videodevice     : Microsoft DV Camera and VCR
  
      videokeyframe_frequency: 5
  
      audiodevice     : Microsoft DV Camera and VCR
  
      audiochannels   : 1
  
      audioinputvolume: 75
  
      canSeekToEnd    : false
  
      createdby       : FMS 3.5
  
      creationdate    : Mon Aug 16 16:35:34 2010
  
      encoder         : Lavf54.29.104
  
    Duration: 00:50:38.05, start: 0.000000, bitrate: 238 kb/s
  
      Stream #2:0: Video: vp6f, yuv420p, 320x240, 204 kb/s, 25 tbr, 1k tbn, 1k tbc
  
      Stream #2:1: Audio: mp3, 22050 Hz, mono, s16, 32 kb/s
  
  File 'output.mp4' already exists. Overwrite ? [y/N] y
  
  using cpu capabilities: none!
  
  [libx264 @ 0x7fa84c02f200] profile High, level 3.1
  
  [libx264 @ 0x7fa84c02f200] 264 - core 119 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - 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=3 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 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf54.29.104
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1024x768, q=-1--1, 25 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 (png) -> overlay:main
  
    Stream #1:0 (vp6f) -> scale
  
    Stream #2:0 (vp6f) -> scale
  
    overlay -> Stream #0:0 (libx264)
  
  Press [q] to stop, [?] for help

  ---

  Update 2 :

  It works ! One important tweak was to move the underlay.png input to the end of the input list. This increased performance substantially. Here’s my final ffmpeg call. (The maps at the end aren’t required for this particular arrangement, but I sometimes have a few extra audio inputs that I want to map to my output.)

  ffmpeg
  
      -i VideoOne.flv
  
      -i VideoTwo.flv
  
      -loop 1 -i Underlay.png
  
      -filter_complex "[2:0] [0:0] overlay=20:main_h/2-overlay_h/2 [overlay];[overlay] [1:0] overlay=main_w-overlay_w-20:main_h/2-overlay_h/2 [output]"
  
      -map [output]:v
  
      -map 0:a
  
      OutputVideo.m4v

• Time FFMPEG takes to encode a video file

  1er avril 2020, par amateur

  I have recently been working with FFMPEG to do some manipulation on video files, becoming aware of the syntax etc and have found it very helpful. I am looking for some feedback though on the speed it takes to encode file. For example, I run the following command against a video file, 1 hour in length, file extension .mov and 4GB in size, and the command takes just over 4 hours to run. It produces a file 2.2GB in size. I am running it on a high spec i7 laptop.

  



      ffmpeg -i "C:\MyInputFile.mov" -b:v 4500k -bufsize 4500k -r 50 -bsf:a aac_adtstoasc -vf scale=1920:1080 "C:\MyOutputFile.mp4"

Please see following the log created at the start of the encoding. I dont have the full log unless I let it run again for 4 hours!

    -i "C:\MyInputFile.mov" -b:v 4500k -bufsize 4500k -r 50 -bsf:a aac_adtstoasc -vf scale=1920:1080 "C:\MyOutputFile.mp4"
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20200122
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --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-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\MyInputFile.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    creation_time   : 2019-06-24T18:14:35.000000Z
    timecode        : 10:00:00:00
  Duration: 01:09:20.12, start: 0.000000, bitrate: 8092 kb/s
    Stream #0:0(eng): Video: mpeg4 (Advanced Simple Profile) (mp4v / 0x7634706D), yuv420p(pc, smpte170m/unknown/smpte170m), 1024x576 [SAR 1:1 DAR 16:9], 6553 kb/s, 25 fps, 25 tbr, 25k tbn, 1k tbc (default)
    Metadata:
      creation_time   : 2019-06-24T18:14:35.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : MPEG-4 Video
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      creation_time   : 2019-06-24T18:14:36.000000Z
      handler_name    : Apple Sound Media Handler
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74) (default)
    Metadata:
      creation_time   : 2019-06-24T19:32:28.000000Z
      handler_name    : Time Code Media Handler
      timecode        : 10:00:00:00
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 000001d8655322c0] VBV maxrate unspecified, assuming CBR
[libx264 @ 000001d8655322c0] using SAR=1/1
[libx264 @ 000001d8655322c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 000001d8655322c0] profile High, level 4.2, 4:2:0, 8-bit
[libx264 @ 000001d8655322c0] 264 - core 159 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - 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=cbr mbtree=1 bitrate=4500 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=4500 vbv_bufsize=4500 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to ' C:\MyOutputFile.mp4':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    timecode        : 10:00:00:00
    encoder         : Lavf58.29.100
    Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 4500 kb/s, 0.02 fps, 12800 tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2019-06-24T18:14:35.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/4500000 buffer size: 4500000 vbv_delay: -1
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2019-06-24T18:14:36.000000Z
      handler_name    : Apple Sound Media Handler
      encoder         : Lavc58.54.100 aac
frame=  273 fps= 21 q=31.0 size=    2048kB time=00:00:05.44 bitrate=3084.1kbits/s dup=136 drop=0 speed=0.415x


  



  Is there any modification I can make to the command to encode it in less time ?

  


• Video cropping with FFMpeg on Android is very slow [duplicate]

  7 avril 2017, par Rami Jemli

  This question already has an answer here :

  • Fast Video Compression on Android
    
    2 answers
    

  What i tried :

  I am trying to implement video cropping on android using FFMpeg (ffmpeg-android).
  

  Here is the command I use :
  

  String[] complexCommand = {"-i", inputPath, "-strict", "experimental", "-vf", "crop=1080:1080:0:0", "-threads", "5", "-c:v", "libx264", "-preset", "ultrafast", filePath};

  The problem :

  Video cropping is working, but even though I am using all needed options to make the operation fast, it still takes a 1min long video the same duration to crop.
  

  How can I achieve better speeds ?
  Will I need to implement video cropping on server instead of device ?
  Is there another way to implement video cropping on Android instead of FFMpeg ?

  I understand that I can achieve better UX by letting the user edit a cropped TextureView/SurfaceView while doing the actual cropping in background, but I want to avoid this way as it takes more time.

  UPDATE

  Here is FFMpeg’s log output :

  SUCCESS with output : ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
      built with gcc 4.8 (GCC)
  
      configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
      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
  
      Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DCIM/100ANDRO/MOV_0066.mp4':
  
      Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2017-04-02 11:58:58
  
      com.android.version: 6.0.1
  
      Duration: 00:00:59.60, start: 0.000000, bitrate: 17759 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 17498 kb/s, SAR 1:1 DAR 16:9, 29.90 fps, 29.92 tbr, 90k tbn, 180k tbc (default)
  
      Metadata:
  
      rotate          : 90
  
      creation_time   : 2017-04-02 11:58:58
  
      handler_name    : VideoHandle
  
      Side data:
  
      displaymatrix: rotation of -90.00 degrees
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 155 kb/s (default)
  
      Metadata:
  
      creation_time   : 2017-04-02 11:58:58
  
      handler_name    : SoundHandle
  
      [libx264 @ 0xb5bc4400] using SAR=1/1
  
      [libx264 @ 0xb5bc4400] using cpu capabilities: none!
  
      [libx264 @ 0xb5bc4400] profile High 4:4:4 Predictive, level 3.2, 4:2:0 8-bit
  
      [libx264 @ 0xb5bc4400] 64 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x1:0x1 me=dia subme=1 psy=0 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=5 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc=cqp mbtree=0 qp=0
  
      Output #0, mp4, to '/storage/emulated/0/Download/compress_video1.mp4':
  
      Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      com.android.version: 6.0.1
  
      encoder         : Lavf57.25.100
  
      Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1080x1080 [SAR 1:1 DAR 1:1], q=-1--1, 29.92 fps, 11488 tbn, 29.92 tbc (default)
  
      Metadata:
  
      handler_name    : VideoHandle
  
      creation_time   : 2017-04-02 11:58:58
  
      encoder         : Lavc57.24.102 libx264
  
      Side data:
  
      unknown side data type 10 (24 bytes)
  
      Stream #0:1(eng): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
      creation_time   : 2017-04-02 11:58:58
  
      handler_name    : SoundHandle
  
      encoder         : Lavc57.24.102 aac
  
      Stream mapping:
  
      Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
      Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
      Press [q] to stop, [?] for help
  
      frame=    6 fps=0.0 q

  Any help is greatly appreciated !