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• Getting rid of FFmpeg non-existng PPS error

  11 août 2016, par Girls.Gone.Wired

  I am using ffmpeg to decode videos. I am aware that the error I am getting is due to the frame/sliceHeader is decoded and the Picture Parameter Set information is not there. I am just curious if anyone knows a way to get rid of this error ? My video is successfully decoding but in the debugger this error makes the metadata hard to read.

  The error is :

  non existing PPS 0 referenced
  
  decode_slice_header error
  
  no frame! 

  ******** My code is in C ******

• ffmpeg error - "error converting wmv to ac3 "

  13 octobre 2014, par yakumo

  hello i have an error

  my line

  ffmpeg -i 00003.track_4352.wav 00003.track_4352.ac3

  and résult

  ffmpeg version 2.1.5 Copyright (c) 2000-2014 the FFmpeg developers
  built on Jul 8 2014 20:44:17 with gcc 4.8.3 (GCC) 20140624 (Red Hat 4.8.3-1)
  configuration : —prefix=/usr —bindir=/usr/bin —datadir=/usr/share/ffmpeg —incdir=/usr/include/ffmpeg —libdir=/usr/lib64 —mandir=/usr/share/man —arch=x86_64 —optflags=’-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong —param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic’ —enable-bzlib —disable-crystalhd —enable-frei0r —enable-gnutls —enable-libass —enable-libcdio —enable-libcelt —enable-libdc1394 —disable-indev=jack —enable-libfreetype —enable-libgsm —enable-libmp3lame —enable-openal —enable-libopencv —enable-libopenjpeg —enable-libopus —enable-libpulse —enable-libschroedinger —enable-libsoxr —enable-libspeex —enable-libtheora —enable-libvorbis —enable-libv4l2 —enable-libvpx —enable-libx264 —enable-libxvid —enable-x11grab —enable-avfilter —enable-avresample —enable-postproc —enable-pthreads —disable-static —enable-shared —enable-gpl —disable-debug —disable-stripping —shlibdir=/usr/lib64 —enable-runtime-cpudetect
  libavutil 52. 48.101 / 52. 48.101
  libavcodec 55. 39.101 / 55. 39.101
  libavformat 55. 19.104 / 55. 19.104
  libavdevice 55. 5.100 / 55. 5.100
  libavfilter 3. 90.100 / 3. 90.100
  libavresample 1. 1. 0 / 1. 1. 0
  libswscale 2. 5.101 / 2. 5.101
  libswresample 0. 17.104 / 0. 17.104
  libpostproc 52. 3.100 / 52. 3.100
  00003.track_4352.wav : Invalid data found when processing input

  I do not understand this error can you help me I would like to convert this file

  thank you in advance

• How to fix ffmpeg 'Assertion error' error in C++

  9 mai 2019, par evn

  I’m writing a program to speed up quiet sections of videos, and I want to support videos up to 2 hours long.

  This is for a command line based program. I’m building it in XCode, then copying the compiled program to a folder with the input video and running it from terminal.

  I’m basically generating a command to run a very large complex filter based on times from ffmpeg’s silence_detect feature, to speed up every other ’section’ of video and then concatenate all those sections together.

  #include <iostream>
  
  #include <vector>
  
  #include <string>
  
  #include <fstream>
  
  #include "CoreFoundation/CoreFoundation.h"
  
  
  
  using namespace std;
  
  
  
  int main(int argc, const char * argv[]) {
  
      CFBundleRef mainBundle = CFBundleGetMainBundle();
  
      CFURLRef resourcesURL = CFBundleCopyResourcesDirectoryURL(mainBundle);
  
      char path[PATH_MAX];
  
      if (!CFURLGetFileSystemRepresentation(resourcesURL, TRUE, (UInt8 *)path, PATH_MAX))
  
      {
  
          // error!
  
      }
  
      CFRelease(resourcesURL);
  
  
  
      /************************************/
  
      /***********Getting Input************/
  
      /************************************/
  
  
  
      chdir(path);
  
      std::cout &lt;&lt; "Current Path: " &lt;&lt; path &lt;&lt; std::endl;
  
  
  
      for (int i = 0; i &lt; argc; i++){
  
          printf("argv[%d] = %s\n", i, argv[i]);
  
      }
  
      string inpath = "input.mp4";
  
      string outpath = "output.mp4";
  
      if(argc >= 1){
  
          inpath = argv[1];
  
      }
  
      if(argc >= 2){
  
          outpath = argv[2];
  
      }
  
      string volcall = "ffmpeg -i \"" + inpath + "\" -af silencedetect=noise=-30dB:d=0.5 -f null - 2> " + inpath + "vol.txt";
  
      system(volcall.c_str());
  
  
  
      /************************************/
  
      /***********File Analysis************/
  
      /************************************/
  
      cout&lt;&lt;"Starting File Analysis"&lt;/loads entire document into sTotal
  
      while(!in.eof()) {
  
          getline(in, s);
  
          sTotal += s + "\n";
  
      }
  
  
  
      size_t pos = sTotal.find("silence_start"); //find location of first time
  
      sNew = sTotal.erase(0,pos); //delete everything prior to location found
  
  
  
      //START TIME EXTRACTION
  
      vector<double> startArr;
  
      vector<double> endArr;
  
  
  
      string term = "silence_start";
  
      int bpos = 0;
  
  
  
      while ((bpos = sNew.find(term,bpos)) != -1)
  
      {
  
          int posStart = 15 + bpos;
  
          string timeStart = sNew.substr (posStart,7);
  
  
  
          float timeSrt = stof (timeStart);
  
          startArr.push_back(timeSrt);
  
          cout&lt;&lt; (timeSrt / 2) &lt;/END TIME EXTRACTION
  
      string term2 = "silence_end";
  
      int bpos2 = 0;
  
  
  
      while ((bpos2 = sNew.find(term2,bpos2)) != -1)
  
      {
  
          int posStart = 13 + bpos2;
  
          string timeEnd = sNew.substr (posStart,7);
  
  
  
          float timeNd = stof (timeEnd);
  
          endArr.push_back(timeNd);
  
          cout&lt;&lt; (timeNd / 2) &lt; totalArr(startArr);
  
  
  
      totalArr.insert( totalArr.end(), endArr.begin(), endArr.end() );
  
      sort(totalArr.begin(), totalArr.end());
  
  
  
      in.close();
  
  
  
      /************************************/
  
      /***********Video Editing************/
  
      /************************************/
  
  
  
      cout&lt;&lt;"Starting Video Editing"&lt; times(totalArr); //starts with next timecode after 0, ends with last timecode 
  
      int numTimes = times.size();
  
  
  
      cmd= cmd + "[0:v]trim=0:" + to_string(times[0]) + ",setpts=" + to_string(first_speed) + "*(PTS-STARTPTS)[v0]; ";
  
      acmd= acmd + "[0:a]atrim=0:" + to_string(times[0]) + ",asetpts=PTS-STARTPTS,atempo=" + to_string(first_speed) + "[a0]; ";
  
  
  
      double mySpeed;
  
      int i;
  
      for(i = 0; i &lt; numTimes - 1; i++){
  
          mySpeed = i%2==1? first_speed : second_speed;
  
          cmd= cmd + "[0:v]trim=" + to_string(times[0 + i]) + ":" + to_string(times[1 + i]) + ",setpts=" + to_string(1 / mySpeed) + "*(PTS-STARTPTS)[v" + to_string(i+1) + "]; ";
  
          acmd= acmd + "[0:a]atrim=" + to_string(times[0 + i]) + ":" + to_string(times[1 + i]) + ",asetpts=PTS-STARTPTS,atempo=" + to_string(mySpeed) + "[a" + to_string(i+1) + "]; ";
  
      }
  
      cmd = cmd + "[0:v]trim=" + to_string(times[i]) + ",setpts=" + to_string(1/(i%2==1? first_speed : second_speed)) + "*(PTS-STARTPTS)[v" + to_string(i + 1) + "]; ";
  
      acmd= acmd + "[0:a]atrim=" + to_string(times[i]) + ",asetpts=PTS-STARTPTS,atempo=" + to_string(i%2==1? first_speed : second_speed) + "[a" + to_string(i + 1) + "]; ";
  
  
  
      string cnc = "";
  
      for(int j = 0; j &lt; i + 2; j++){
  
          cnc = cnc + "[v" + to_string(j) + "][a" + to_string(j) + "]";
  
      }
  
      cnc = cnc + "concat=n=" + to_string(i + 2) + ":v=1:a=1";
  
  
  
      cmd = cmd + acmd + cnc + "\" -preset superfast -profile:v baseline " + outpath;
  
  
  
      system(cmd.c_str());
  
      return 0;
  
  }
  
  </double></double></fstream></string></vector></iostream>

  I expect the output to be a video of shorter length to the input. (or equal length if the input video has no quiet parts).

  This sometimes works perfectly :

  Here is the actual command that worked in shortening Jacksfilms’ ’woooooww’ video from 17.200 seconds to 13.434 seconds.

  ffmpeg -loglevel verbose -i WOOOW.mp4 -filter_complex "[0:v]trim=0:0.978250,setpts=1.000000*(PTS-STARTPTS)[v0]; [0:v]trim=0.978250:2.452020,setpts=0.500000*(PTS-STARTPTS)[v1]; [0:v]trim=2.452020:3.706520,setpts=1.000000*(PTS-STARTPTS)[v2]; [0:v]trim=3.706520:5.565560,setpts=0.500000*(PTS-STARTPTS)[v3]; [0:v]trim=5.565560:7.122250,setpts=1.000000*(PTS-STARTPTS)[v4]; [0:v]trim=7.122250:8.272020,setpts=0.500000*(PTS-STARTPTS)[v5]; [0:v]trim=8.272020:8.892350,setpts=1.000000*(PTS-STARTPTS)[v6]; [0:v]trim=8.892350:10.034100,setpts=0.500000*(PTS-STARTPTS)[v7]; [0:v]trim=10.034100:11.695400,setpts=1.000000*(PTS-STARTPTS)[v8]; [0:v]trim=11.695400:13.783300,setpts=0.500000*(PTS-STARTPTS)[v9]; [0:v]trim=13.783300,setpts=1.000000*(PTS-STARTPTS)[v10]; [0:a]atrim=0:0.978250,asetpts=PTS-STARTPTS,atempo=1.000000[a0]; [0:a]atrim=0.978250:2.452020,asetpts=PTS-STARTPTS,atempo=2.000000[a1]; [0:a]atrim=2.452020:3.706520,asetpts=PTS-STARTPTS,atempo=1.000000[a2]; [0:a]atrim=3.706520:5.565560,asetpts=PTS-STARTPTS,atempo=2.000000[a3]; [0:a]atrim=5.565560:7.122250,asetpts=PTS-STARTPTS,atempo=1.000000[a4]; [0:a]atrim=7.122250:8.272020,asetpts=PTS-STARTPTS,atempo=2.000000[a5]; [0:a]atrim=8.272020:8.892350,asetpts=PTS-STARTPTS,atempo=1.000000[a6]; [0:a]atrim=8.892350:10.034100,asetpts=PTS-STARTPTS,atempo=2.000000[a7]; [0:a]atrim=10.034100:11.695400,asetpts=PTS-STARTPTS,atempo=1.000000[a8]; [0:a]atrim=11.695400:13.783300,asetpts=PTS-STARTPTS,atempo=2.000000[a9]; [0:a]atrim=13.783300,asetpts=PTS-STARTPTS,atempo=1.000000[a10]; [v0][a0][v1][a1][v2][a2][v3][a3][v4][a4][v5][a5][v6][a6][v7][a7][v8][a8][v9][a9][v10][a10]concat=n=11:v=1:a=1" -preset superfast -profile:v baseline shortWOWOUT.mp4 2> shortWOWOUT.mp4_log.txt

  But sometimes the code stops and returns an error :

  Assertion start_sample < end_sample || (start_sample == end_sample && !frame->nb_samples) failed at libavfilter/trim.c:303

  This seems to only happen when ffmpeg is rendering somewhere around the 3 minute mark. There does not seem to be a correlation of file size, resolution, bitrate, framerate, or length of the generated command. There does seem to be a correlation with the length of the input video, but I’m not sure what it is e.g. a 3m56s video worked fine but a 5m57 video threw an error.

  Is there a way to fix this ? Or is this program doomed to fail when the input video passes some unknown cut-off time ?