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• Could not write header for output file #0 (incorrect codec parameters ?) : Broken pipe

  23 mai 2020, par Laura

  I'm trying to generate audio waveform from an mp4 file as described here : https://github.com/bbc/audiowaveform.

  



  My mp4 file looks like

  



  <?xml version="1.0" encoding="UTF-8"?>


  



  http://www.w3.org/2001/XMLSchema-instance' ;>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 


  



  <format filename="/cache/1268.mp4" duration="40.112000" size="10610125">&#xA;    <tag key="major_brand" value="isom"></tag>&#xA;    <tag key="minor_version" value="512"></tag>&#xA;    <tag key="compatible_brands" value="isomiso2avc1mp41"></tag>&#xA;    <tag key="encoder" value="Lavf58.20.100"></tag>&#xA;</format>&#xA;

  



  



  I wrote this command line :
/ffmpeg-4.1.1/ffmpeg -i /cache/1268.mp4 -map 0:1 -f wav - | /opt/audiowaveform/audiowaveform —input-format wav —pixels-per-second 25 -b 16

  



  But it fails with the folliwing error :
Could not write header for output file #0 (incorrect codec parameters ?) : Broken pipe
Error initializing output stream 0:0 —
Conversion failed !

  



  Complete log is :

  



          ffmpeg version 4.2.2-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
      built with gcc 8 (Debian 8.3.0-6)
      configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
      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
    Error: unrecognised option '--input-format'
    See '/opt/audiowaveform/audiowaveform --help' for available options
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/cache/1268.mp4':
      Metadata:
        major_brand     : isom
        minor_version   : 512
        compatible_brands: isomiso2avc1mp41
        title           : Big Buck Bunny - test 8
        encoder         : Lavf57.72.101
        comment         : Matroska Validation File 8, secondary audio commentary track, misc subtitle tracks
      Duration: 00:00:46.07, start: 0.000000, bitrate: 2111 kb/s
        Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1024x576 [SAR 1:1 DAR 16:9], 1908 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
        Metadata:
          handler_name    : VideoHandler
        Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 129 kb/s (default)
        Metadata:
          handler_name    : SoundHandler
        Stream #0:2(eng): Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, mono, fltp, 67 kb/s
        Metadata:
          handler_name    : SoundHandler
    Stream mapping:
      Stream #0:1 -> #0:0 (aac (native) -> pcm_s16le (native))
    Press [q] to stop, [?] for help
    Could not write header for output file #0 (incorrect codec parameters ?): Broken pipe
    Error initializing output stream 0:0 --
    Conversion failed!


  



  Can anyone help me ?

  



  Note : I read the answer here ffmpeg Could not write header for output file #0 but I need to preserve audio codec.

  


• ffmpeg : transmission problems / artifacts in rtsp screen grab - might be a WiFi problem

  1er décembre 2022, par Jo Kerner

  In short : Is there a way to "force" ffmpeg to not save a grabbed frame if there are transmission problems ? Or any other software that does the same and I just don't know of ?

  


  Long story :

  


  Updating my house surveillance from almost 10 years old DCS-932L cameras to Tapo C100 Cameras, I changed the image delivery method from ftp push to rtsp grab via ffmpeg.

  


  I had written a program in C++ to check for "bad" pictures from the old cameras, where parts of the picture tended to be simply black once every minute or so (I'm grabbing a pic every 2 seconds). The Tapo C100 doesn't feature ftp-push, thus I tried (after a few days trying)

  


  ffmpeg.exe -y -i rtsp://user:pass@10.0.0.%ld:554/stream1 -vframes 1 %scamera\rtsp.jpg -loglevel quiet


  


  This works absolutely perfect in my main house, which features a Fritz !Box 7590 and a set of Fritz !Powerline (510/and two 540e) repeaters, plus one WiFi repeater Fritz 600) as my phone line and the router are in the basement.

  


  In my holiday home, though, it doesn't. The Wifi is managed by a Hybrid DSL/5G - box I have no alternative to, which is a Huawei DN9245W and works as DHCP Server, because this is almost impossible to change. Everything "real" is managed by another Fritz !Box 7590, connected via ethernet, and another set of Fritz !Powerline 510 and two 540e repeaters plus half a dozen Wifi Repeaters, mostly Fritz ! 310, 450E and 600. The house was partially built with local stones, which are very iron-y, and there's a lot of metallized glass. Full set is show in Image

  


  Now, this does produce different artifacts, about two per minute or in every 15th picture, see
Image with artifacts No. 1

  


  Thinking this might be a transmission problem, I tried forcing the streamgrab via TCP, because while rtsp doesn't have error correction, TCP does :

  


  ffmpeg.exe -rtsp_transport tcp -i
rtsp://user:pass@10.0.0.%ld:554/stream1 -y -f image2 -update 1 -r
1 -vframes 1 -qscale:v 30 %scamera\rtsp.jpg -loglevel quiet


  


  Which didn't change the artifacts much, see Image with artifacts No. 2

  


  The house now has a total of 12 Cameras, six of which are each "managed" by an older Dell Optiplex Desktop bought used off ebay with an i3 or i5 processor from about 2015, which goes to about 65% load. My software will check if the grabbed picture is finished saving (to RAMdisk), rename it, check if there are artifacts, if so, drop it, if not, convert to bitmap and then compare it to previous image, guess if there's a change, mark that change with a rhombus and rate it, save that as a jpeg file, and then some other stuff that's not relevant here. See : Image of my program running with six cameras

  


  I did try grabbing keyframes only, but a bunny or deer or burglar hopping through my property doesn't produce a keyframe, so that turned out to be missing the point.

  


  I'm out of ideas here. It does work flawlessly in the main house. It doesn't in the holiday house. I can hardly install more repeaters ; I already tried mesh and not-mesh, and the problem isn't exactly wifi overload, because even with just one camera running, it still persists. In certain places. Some have no problems. Reasons ? No clue. I really hope someone has a good idea.

  


• How to ffmpeg command execution in ffmpeg4android app

  3 février 2014, par Sanket990

  If i m using ffmpeg4android Play store app and executing command for video trim but they are not working i m using below command for trimming

  ffmpeg -i /sdcard/vide.mp4 -ss 00:10:00 -t 00:12:00 -async 1 /sdcard/cut.mp4

  Above Command Execute but not showing file cut.mp4 in sdcard .if you know another way for video trimming then show me example or link Thanks in Advance

  If i m running this command showing Logcat

  Looks like Vk log is not increasing in size
  /sdcard/vide.mp4 : No such file or directory
  I m already add file in sdcard path