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• FFMPEG [SHELL CMD] cutting last x frames [SHELL CMD] combining videos

  25 avril 2014, par user1708604

  .mp4 videos in 1920 x 1080, 25 frames / second
  different length

  Two commands needed :

  0) One command should delete x frames from the end of the video and create a new video without the last x frames as .mp4, save it in folder y
  1) One command should combine x amount of videos to one new video

  Just for info : I am using Python to call ffmpeg.
  Platform : Windows or CentOS.

  Many thanks in advance. :)

• 2 source videos in FFMPEG... how to map audio ?

  21 juin 2012, par dcoffey3296

  i am currently placing 2 videos side by side in FFMPEG. Here is the command :

  ffmpeg -i input.mov -vf "[in] scale=1280:720, pad=2*1280:720 [left]; movie=right.mov, scale=1280:720 [right]; [left][right]  overlay=1280:0 [out]" -b:v 1000k -vcodec libx264 -an sidebyside.mp4

  I now need to manage the audio. I keep trying to specify :

  -acodec libfaac -ac 2 -map 0:1 -map 0:2

  to take the 2 audio channels from the first input and use them. I keep getting the error :

  [aformat @ 0x7febf2e01fc0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'src' and the filter 'aformat'
  
      [aresample @ 0x7febf2e02180] [SWR @ 0x7febf40dd000] Input channel layout isnt supported
  
  Error opening filters!

  I'm looking for the best way to specify which video provides the audio ! Thanks for any advice !

  Here's the complete output :

  ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jun  9 2012 21:40:17 with clang 3.0 (tags/Apple/clang-211.10.1)
  
    configuration: --prefix= --enable-gpl --enable-version3 --enable-nonfree --enable-libx264 --enable-libxvid --enable-postproc --enable-swscale --enable-avfilter --enable-pthreads --enable-yasm --enable-libfaac --enable-libmp3lame --cc=clang --enable-libvorbis
  
    libavutil      51. 54.100 / 51. 54.100
  
    libavcodec     54. 23.100 / 54. 23.100
  
    libavformat    54.  6.100 / 54.  6.100
  
    libavdevice    54.  0.100 / 54.  0.100
  
    libavfilter     2. 77.100 /  2. 77.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'left.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      creation_time   : 2012-06-19 21:13:20
  
    Duration: 00:02:28.81, start: 0.000000, bitrate: 36378 kb/s
  
      Stream #0:0(eng): Video: mpeg2video (Main) (xdvf / 0x66766478), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 35000 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 59.94 tbc
  
      Metadata:
  
        creation_time   : 2012-06-19 21:13:20
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels (FL), s16, 768 kb/s
  
      Metadata:
  
        creation_time   : 2012-06-19 21:13:20
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels (FR), s16, 768 kb/s
  
      Metadata:
  
        creation_time   : 2012-06-19 21:13:20
  
        handler_name    : Apple Alias Data Handler
  
      Stream #0:3(eng): Data: none (tmcd / 0x64636D74)
  
      Metadata:
  
        creation_time   : 2012-06-19 21:13:20
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 02:20:28;08
  
  File 'output.mp4' already exists. Overwrite ? [y/N] y
  
  w:1920 h:1080 pixfmt:yuv420p tb:1/2997 sar:1/1 sws_param:flags=2
  
  [buffersink @ 0x7febf2c18c80] No opaque field provided
  
  [movie @ 0x7febf2c191c0] seek_point:0 format_name:(null) file_name:/Users/danielpcoffey/Desktop/tommy.mov stream_index:0
  
  [scale @ 0x7febf2c19320] w:1920 h:1080 fmt:yuv420p sar:1/1 -> w:1280 h:720 fmt:yuv420p sar:1/1 flags:0x4
  
  [pad @ 0x7febf2c19800] w:1280 h:720 -> w:2560 h:720 x:0 y:0 color:0x000000FF
  
  [scale @ 0x7febf2c1ca40] w:1920 h:1080 fmt:yuv420p sar:1/1 -> w:1280 h:720 fmt:yuva420p sar:1/1 flags:0x4
  
  [overlay @ 0x7febf2c1ce20] main w:2560 h:720 fmt:yuv420p overlay x:1280 y:0 w:1280 h:720 fmt:yuva420p
  
  [overlay @ 0x7febf2c1ce20] main_tb:1/2997 overlay_tb:1/2997 -> tb:1/2997 exact:1
  
  [aformat @ 0x7febf2e01fc0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'src' and the filter 'aformat'
  
  [aresample @ 0x7febf2e02180] [SWR @ 0x7febf40dd000] Input channel layout isnt supported
  
  Error opening filters!

• ffmpeg socks4 proxy parameter with rtmp

  27 octobre 2014, par user3337066

  I am unable to capture some livestreams because of the proxy issues. So in rtmpdump i can use :

  rtmpdump -v -r rtmp://a_rtmp_address -p http://a_http_address -S 85.185.244.101:1080 -B 10 -o aaa.flv

  But I need to use ffmpeg or avconv. But I can not find a parameter corresponds to that -S 85.185.244.101:1080 parameter.

  Can anyone please give me an ffmpeg command corresponding to this rtmpdump command.