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• ffmpeg first segment does not have audio

  5 mars 2018, par Giorgi Peikrishvili

  I’m recording http stream using ffmpeg. Here is my command :

  ffmpeg -i https://tv-tbs-silk-front 1.adjara.com/4w/rustavi2hd/index.m3u8\?token\=376d9f864d81c7f85410ac5d3d0bde3dd6574daf-Hog86dAubE-1522939917-1520175117 -c copy -map 0 -bsf:a aac_adtstoasc -flags +global_header -f segment -segment_time 10 -force_key_frames 10 -segment_format_options movflags=+faststart -reset_timestamps 1 -strftime 1 %Y-%m-%d_%H-%M-%S.mov

  It makes segments as should be, but the only first segment does not have sound, others does.
  Any ideas about that ?

  Update as suggested in comments :
  Here is full output

  ffmpeg -i  -c copy -map 0 -g 10 -bsf:a aac_adtstoasc -flags 
  
  +global_header -f segment -segment_time 10 -force_key_frames 10 -
  
  segment_format_options movflags=+faststart -reset_timestamps 1 -
  
  strftime 1 %Y-%m-%d_%H-%M-%S.mov
  
  ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers 
  
  built with Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 
  
  3.6.0svn) configuration: --prefix=/Users/Cipusha/anaconda2 
  
  --disable-doc --enable-shared --enable-static --extra-cflags='-Wall -g 
  
  -m64 -pipe -O3 -march=x86-64 -fPIC -I/Users/Cipusha/anaconda2/include' 
  
  --extra-cxxflags='=-Wall -g -m64 -pipe -O3 -march=x86-64 -fPIC' --
  
  extra-libs='-L/Users/Cipusha/anaconda2/lib -lz' --enable-pic --enable-
  
  gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --
  
  enable-libx264
  
  
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  
  
  Input #0, hls,applehttp, from 'https://tv-tbs-silk-front-
  
  1.adjara.com/4w/rustavi2hd/index.m3u8?
  
  token=376d9f864d81c7f85410ac5d3d0bde3dd6574daf-Hog86dAubE-1522939917-
  
  1520175117':
  
  Duration: N/A, start: 58671.490378, bitrate: N/A
  
    Program 0 
  
      Metadata:
  
        variant_bitrate : 2953271
  
      Stream #0:0: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, 
  
  stereo, fltp
  
  Metadata:
  
        variant_bitrate : 2953271
  
      Stream #0:1: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 
  
  720x576 [SAR 1:1 DAR 5:4], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
      Metadata:
  
         variant_bitrate : 2953271
  
  Output #0, segment, to '%Y-%m-%d_%H-%M-%S.mov':
  
    Metadata:
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, 
  
  stereo
  
      Metadata:
  
        variant_bitrate : 2953271
  
      Stream #0:1: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 
  
  720x576 [SAR 1:1 DAR 5:4], q=2-31, 25 fps, 25 tbr, 12800 tbn, 25 tbc
  
      Metadata:
  
        variant_bitrate : 2953271
  
  Stream mapping:
  
        Stream #0:0 -> #0:0 (copy)
  
        Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [mov @ 0x7f9c97018e00] Starting second pass: moving the moov atom to the beginning of the file
  
  [mov @ 0x7f9c96803200] Starting second pass: moving the moov atom to the beginning of the file
  
  [mov @ 0x7f9c98000000] Starting second pass: moving the moov atom to the beginning of the file
  
  frame=  581 fps= 38 q=-1.0 Lsize=N/A time=00:00:23.20 bitrate=N/A speed= 1.5x

  Thank you very much

• How to trim multiple videos and position them to specific position using -filter_complex ?

  16 décembre 2023, par Pavlo Holotiuk

  How do I mix several videos and have them not overlap each other ?
I need to use -filter_complex as I cram many more commands there and seems weird how when I trim video its frames remain and overlap with the other video. I also use tpad to paint the video black where it supposed to be cut but it just makes black images to overlap with other videos instead.

  


  How do I trim and position videos with mix and make sure their frames do not overlap in result ?
Here's the version vithout tpad

  


  ./ffmpeg.exe -i input1.mp4 -i input2.mp4 -filter_complex "[0]trim=start=0:end=5[t0];[1]trim=start=5:end=10[t1];[t0][t1]mix=inputs=2" ./output.mp4

  


  It produces such overlapping frames


  


  When adding tpad overlapping changes to mix of frame and black image

  


  ./ffmpeg.exe -i input1.mp4 -i input2.mp4 -filter_complex "[0]trim=start=0:end=5[t0];[1]trim=start=5:end=10,setpts=PTS-5/TB,tpad=start_duration=5:start_mode=add:color=black@0x00[t1];[t0][t1]mix=inputs=2" ./output.mp4

  


  

  


  The alpha in tpad doesn't seem to do anything either.

  


• ffmpeg : Combine png frames with transparent background into a video and merge with an image

  15 avril 2023, par andyts93

  I'm trying to combine multiple png frames into a video with ffmpeg, keeping the transparency, to then combine it with an image.
The png video comes with a black background so when i try to combine it with an image, the image is completely overlayed by the black background, how can I keep the transparency ?

  


  Here's the command to combine the PNGs :

  


  ffmpeg -y -i src/tmp/%d.png -c:v libx264 -vf fps=25 -pix_fmt yuva420p land.mov