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• FFMPEG : Combine "Create video from images" + scale to x + add audio + overlay logo

  7 janvier 2020, par Thomas Wild

  I´m working on a webcam-project. It is for generating timelapse videos of sunset/sundown.

  I´m using a raspberrypi to generate them with gphoto2 + DSLR.

  At the end of the day the images should get to an video, with audio and an overlay logo.
  And it should be scaled to 1920 pixel.
  I got a nice solution an it worked.

  1. Producing the timelapse video an scale it :

     ffmpeg -y -framerate 25 -start_number 0000001 -i /var/www/html/webcam/2020-01-05_bilder/%7d.jpg -vf scale=1920:-1 -pix_fmt yuv420p /var/www/html/webcam/2020-01-05-tag-output-1920.mp4

  2. Taking the output of (1) and add an overlay-logo, add audio

     ffmpeg -y -i '/var/www/html/webcam/2020-01-05-tag-output-1920.mp4'
-i '/var/www/html/webcam-scripts/graphics/logo.png'
-i '/var/www/html/webcam-scripts/sounds/chill_time_5.mp3'
-shortest -filter_complex '[1][0]scale2ref=h=ow/mdar:w=iw/6[#A logo][liebfrauen]; [#A logo]format=argb,colorchannelmixer=aa=0.95[#B logo transparent]; [liebfrauen][#B logo transparent] overlay=(main_w-w)-(main_w*0.05):(main_h-h)-(main_h*0.01)'
-c:v libx264 -crf 18 -preset slow -pix_fmt yuv420p -c:a aac -strict -2
'/var/www/html/webcam/2020-01-05-tag-1920.mp4

  I tried to combine both actions, but I get an error :

  ffmpeg -y -framerate 25 -start_number 0000001 -i '/var/www/html/webcam/2020-01-05_bilder/%7d.jpg' -vf scale=1920:-1 -pix_fmt yuv420p -i '/var/www/html/webcam-scripts/graphics/logo.png' -i '/var/www/html/webcam-scripts/sounds/chill_time_5.mp3' -shortest -filter_complex '[1][0]scale2ref=h=ow/mdar:w=iw/6[#A logo][liebfrauen]; [#A logo]format=argb,colorchannelmixer=aa=0.95[#B logo transparent]; [liebfrauen][#B logo transparent] overlay=(main_w-w)-(main_w*0.05):(main_h-h)-(main_h*0.01)' -c:v libx264 -crf 18 -preset slow -pix_fmt yuv420p -c:a aac -strict -2 '/var/www/html/webcam/2020-01-05-tag-1920.mp4'

  Error : Filtergraph ’scale=720 :-1’ was specified through the -vf/-af/-filter option for output stream 0:0, which is fed from a complex filtergraph.
   vf/-af/-filter and -filter_complex cannot be used together for the same stream.

  Isn`t it possible to combine these inputs and scale it ? Or ... Where is my misunderstanding ?

• How can i merge 2 videos with audio using ffmpeg ?

  4 juin 2020, par Easy Tricks For Android

  I tried this command
ffmpeg -f concat -i mylist.txt -c copy output.mp4
but output.mp4 has no audio. please help me.

  



  the mylist.txt contains these words : file '1.mp4'
file '2.mp4'

  
this is the log

  



  


  C :\Users\Admin\OneDrive\Desktop\New folder>ffmpeg -n -i 1.mp4 -i 2.mp4
 ffmpeg version git-2020-05-23-26b4509 Copyright (c) 2000-2020 the FFmpeg developers
 built with gcc 9.3.1 (GCC) 20200523
 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-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-libvmaf —enable-libvorbis —enable-libvo-amrwbenc —enable-libmysofa —enable-libspeex —enable-libxvid —enable-libaom —disable-w32threads —enable-libmfx —enable-ffnvcodec —enable-cuda-llvm —enable-cuvid —enable-d3d11va —enable-nvenc —enable-nvdec —enable-dxva2 —enable-avisynth —enable-libopenmpt —enable-amf
 libavutil 56. 48.100 / 56. 48.100
 libavcodec 58. 87.101 / 58. 87.101
 libavformat 58. 43.100 / 58. 43.100
 libavdevice 58. 9.103 / 58. 9.103
 libavfilter 7. 83.100 / 7. 83.100
 libswscale 5. 6.101 / 5. 6.101
 libswresample 3. 6.100 / 3. 6.100
 libpostproc 55. 6.100 / 55. 6.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4' :
 Metadata :
 major_brand : mp42
 minor_version : 0
 compatible_brands : mp41isom
 creation_time : 2020-05-31T08:12:56.000000Z
 Duration : 00:00:05.93, start : 0.000000, bitrate : 186 kb/s
 Stream #0:0(und) : Video : h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 184 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc (default)
 Metadata :
 creation_time : 2020-05-31T08:21:56.000000Z
 handler_name : VideoHandler
 encoder : AVC Coding
 Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '2.mp4' :
 Metadata :
 major_brand : mp42
 minor_version : 0
 compatible_brands : mp41isom
 creation_time : 2020-06-01T03:32:58.000000Z
 Duration : 00:00:12.23, start : 0.000000, bitrate : 1909 kb/s
 Stream #1:0(und) : Video : h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1708 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc (default)
 Metadata :
 creation_time : 2020-06-01T04:17:17.000000Z
 handler_name : VideoHandler
 encoder : AVC Coding
 Stream #1:1(und) : Audio : aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 196 kb/s (default)
 Metadata :
 creation_time : 2020-06-01T04:17:17.000000Z
 handler_name : SoundHandler
 At least one output file must be specified

  


  


• Revision af3519a385 : Change the use of a reserved color space entry This commit rename a reserved co

  7 novembre 2014, par Yaowu Xu

  Changed Paths :
   Modify /vp9/common/vp9_enums.h

  
  
  Change the use of a reserved color space entry

  This commit rename a reserved color space entry to BT_2020, it intends
  to provide support for VP9 bitstream to pass along the color space
  type defined in BT.2020(Rec.2020)

  please note this entry does not have any effect on encoding/decoding
  behavior, but allow applications to the pass the information along
  from encoding end to decoding end.

  Change-Id : I4678520e89141ea5e8900f7bd1c0e95b710b7091