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• How to exclude night images to be passed for ffmpeg ?

  4 novembre 2019, par LA_

  My files have the following filenames -

  YYYYMMDDHHmmSS.jpg

  I pass them to ffmpeg (on MacOS) for timelapse creation :

  ffmpeg -framerate 500 -pattern_type glob -i '*.jpg' -c:v libx264 -pix_fmt yuv420p out.mp4

  Now I would like to exclude night photos, for ex., if filename is between YYYYMMDD200000.jpg and YYYYMMDD080000.jpg, then files shouldn’t be passed to ffmpeg.

  How could I achieve that (ideally - without moving files) ?

  Upd. Using the following command now, but it captures the following hours only : 10-19.

  ffmpeg -framerate 500 -pattern_type glob -i '2019[01][089][012][0123456789]1*.jpg' -c:v libx264 -pix_fmt yuv420p out3.mp4

• How to concatenate two or more videos with same width and different height in FFMpeg and to maintain the same aspect ratio ?

  25 octobre 2019, par Aarwil

  I have five video parts to concat all. Each five videos are in the same width and height. The second part is the hstack of another 2 videos and the third part is the hstack and vstack of another 3 videos. While concat all the five video parts the aspect ratio is not maintaining in the final video. Since I am new to ffmpeg help me to sort out the problem

  I have tried with the command in my final with filter complex and to reduce the size I used frame per second.

  "ffmpeg -i
final.mp4 -vf scale=1280:480 -filter:v fps=fps=30 finalNew.mp4"

  but nothing worked.
  Also help me to use hstack with scaling, to maintain the aspect ratio for the second part on below command

  Command : ffmpeg -i vid1.mkv -i vid2.mkv -filter_complex "[0:v]scale=-1:480[v0] ;[0:v][1:v]hstack=inputs=2"vid3.mkv

  Images

  second part

  third part

  videochunks

  I have console the info of my video

  ffmpeg -i part1.mkv -i part2.mkv -i part3.mkv -i part4.mkv -i part5.mkv
ffmpeg version N-94911-g197985c5bf Copyright (c) 2000-2019 the FFmpeg developers
 built with gcc 9.1.1 (GCC) 20190807
 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-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
 libavutil      56. 35.100 / 56. 35.100
 libavcodec     58. 56.101 / 58. 56.101
 libavformat    58. 32.104 / 58. 32.104
 libavdevice    58.  9.100 / 58.  9.100
 libavfilter     7. 58.102 /  7. 58.102
 libswscale      5.  6.100 /  5.  6.100
 libswresample   3.  6.100 /  3.  6.100
 libpostproc    55.  6.100 / 55.  6.100
Input #0, matroska,webm, from 'part1.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:44.00, start: 0.000000, bitrate: 189 kb/s
   Stream #0:0(eng): Video: h264 (High), yuv420p(progressive), 640x480 [SAR 9:16 DAR 3:4], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     title           : Video
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:44.000000000
Input #1, matroska,webm, from 'part2.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:01:22.07, start: 0.000000, bitrate: 113 kb/s
   Stream #1:0: Video: h264 (High), yuv420p(progressive), 640x240 [SAR 9:16 DAR 3:2], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:01:22.066000000
Input #2, matroska,webm, from 'part3.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:42.03, start: 0.000000, bitrate: 405 kb/s
   Stream #2:0: Video: h264 (High), yuv420p(progressive), 640x720 [SAR 9:16 DAR 1:2], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:42.033000000
Input #3, matroska,webm, from 'part4.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:21.00, start: 0.000000, bitrate: 298 kb/s
   Stream #3:0: Video: h264 (High), yuv420p(progressive), 640x240 [SAR 9:16 DAR 3:2], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:21.000000000
Input #4, matroska,webm, from 'part5.mkv':
 Metadata:
   ENCODER         : Lavf58.32.104
 Duration: 00:00:16.00, start: 0.000000, bitrate: 169 kb/s
   Stream #4:0(eng): Video: h264 (High), yuv420p(progressive), 640x480 [SAR 9:16 DAR 3:4], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
   Metadata:
     title           : Video
     ENCODER         : Lavc58.56.101 libx264
     DURATION        : 00:00:16.000000000

• ffmpeg encoding for 3.0 and 3.1 channels in Dolby Digital format (.ac3)

  4 novembre 2019, par CC2023

  I was able to encode .wav to .ac3 (Dolby Digital) via.zz ffmpeg for channel 2.0, 2.1, 4.0, 4.1, 5.0, 5.1, but not channel 3.0 and 3.1.

  When I played back .ac3 files on Onkyo 7.2 receiver, error on channel 3.0 and 3.1 was :

  3.0 channels :

  right channel ok

  left channel ok

  center channel played back at subwoofer

  3.1 channels :

  right channel ok

  left channel ok

  lfe channel ok

  center channel played back at surround left speaker (sL)

  This is command I used :

  ffmpeg -i 3_channel.wav -c:a ac3 3_channel.ac3    
  
  ffmpeg -i 3_1_channel.wav -c:a ac3 3_1_channel.ac3

  My ffmpeg version git-2019-10-28-68f623d

  Why I have successful encoding on channel 2.x, 4.x, 5.x, but not 3.x ? thanks ahead for any comments.