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• FFMPEG : Adding font to Video gives error

  7 juin 2016, par janki gadhiya

  I am trying to execute ffmpeg on android. I have successfully executed 2-3 commands also. But i am stuck at one point where i am adding text to the video.

  Here is the command i am executing.

  NOT WORKING : because the text argument has a space between two words.

  "-i "+path+"out.mp4 -vf drawtext=fontfile="+path+"f1.ttf:text='Stack OverFlow' -y -c:v libx264 -c:a copy -movflags +faststart "+path+"output.mp4"

  WORKING : just removed space.

  "-i "+path+"out.mp4 -vf drawtext=fontfile="+path+"f1.ttf:text='StackOverFlow' -y -c:v libx264 -c:a copy -movflags +faststart "+path+"output.mp4"

  Here path contains my external Sd card’s path. out.mp4 and f1.ttf exists in my folder.

  My Question is why it is not working with space.

  Here is the stack trace i am getting.

  FAILED with output : WARNING: linker: /data/data/com.github.hiteshsondhi88.sampleffmpeg/files/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix.
  
  ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
  built with gcc 4.8 (GCC)
  
  configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/i686-linux-android- --arch=x86 --cpu=i686 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/x86 --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -march=i686' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
  libavutil      55. 17.103 / 55. 17.103
  
  libavcodec     57. 24.102 / 57. 24.102
  
  libavformat    57. 25.100 / 57. 25.100
  
  libavdevice    57.  0.101 / 57.  0.101
  
  libavfilter     6. 31.100 /  6. 31.100
  
  libswscale      4.  0.100 /  4.  0.100
  
  libswresample   2.  0.101 /  2.  0.101
  
  libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Testing/out.mp4':
  
  Metadata:
  
  major_brand     : isom
  
  minor_version   : 512
  
  compatible_brands: isomiso2avc1mp41
  
  encoder         : Lavf57.25.100
  
  Duration: 00:00:05.00, start: 0.000000, bitrate: 117 kb/s
  
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 300x300 [SAR 40:33 DAR 40:33], 113 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
  Metadata:
  
  handler_name    : VideoHandler
  
  [NULL @ 0xb585f000] Unable to find a suitable output format for 'text='Stack'
  
  text='Stack: Invalid argument

  Why it is saying invalid argument. It will be great if any ffmpeg expert can guide me in what i am doing wrong here.

  I have refered this Question of SO : Text on video ffmpeg

• It’s Piwik Analytics Survey time : Your Opinion Matters !

  8 janvier 2017, par Piwik Core Team — Community

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• Connection reset by peer, ffmpeg

  18 août 2016, par Johnnylin

  I have tried several ways and done a lot of search. I just cannot figure out why this happens.

  This is the thread. I did almost the same thing.

  https://ffmpeg.org/pipermail/libav-user/2014-March/006356.html

  When you use ffmpeg command line together with ffserver, it works. But when you use sample code. It just does not work.

  What is missing ?

  EDIT

  Hi all,

  I took the muxing.c example and modified it in order to send a stream
  through a network socket. I only made few modifications :

  main function now looks like :

  int main()
  
  {
  
      AVOutputFormat *fmt;
  
      AVFormatContext *oc;
  
      AVStream *audio_st, *video_st;
  
      AVCodec *audio_codec, *video_codec;
  
      double audio_time, video_time;
  
      int flush, ret;
  
  
  
      /* Initialize libavcodec, and register all codecs and formats. */
  
      av_register_all();
  
      avformat_network_init();
  
  
  
      /* allocate the output media context */
  
      avformat_alloc_output_context2(&oc, NULL, "mpegts", NULL);
  
      if (!oc) {
  
          printf("Could not deduce output format from file extension: using
  
  MPEG.\n");
  
          avformat_alloc_output_context2(&oc, NULL, "mpegts", NULL);
  
      }
  
      if (!oc)
  
          return 1;
  
  
  
      fmt = oc->oformat;
  
      //fmt->video_codec = AV_CODEC_ID_MPEG2VIDEO;
  
      //fmt->audio_codec = AV_CODEC_ID_MP3;
  
  
  
      /* Add the audio and video streams using the default format codecs
  
       * and initialize the codecs. */
  
      video_st = NULL;
  
      audio_st = NULL;
  
  
  
      if (fmt->video_codec != AV_CODEC_ID_NONE)
  
          video_st = add_stream(oc, &video_codec, fmt->video_codec);
  
      if (fmt->audio_codec != AV_CODEC_ID_NONE)
  
          audio_st = add_stream(oc, &audio_codec, fmt->audio_codec);
  
  
  
      /* Now that all the parameters are set, we can open the audio and
  
       * video codecs and allocate the necessary encode buffers. */
  
      if (video_st)
  
          open_video(oc, video_codec, video_st);
  
      if (audio_st)
  
          open_audio(oc, audio_codec, audio_st);
  
  
  
     av_dump_format(oc, 0, "http://localhost:8090/feed1.ffm", 1);
  
  
  
      /* open the output file, if needed */
  
      if (!(fmt->flags & AVFMT_NOFILE)) {
  
          ret = avio_open(&oc->pb, "http://localhost:8090/feed1.ffm",
  
  AVIO_FLAG_WRITE);
  
          if (ret < 0) {
  
              fprintf(stderr, "Could not open '%s': %s\n", "
  
  http://localhost:8090/feed1.ffm",
  
                      av_err2str(ret));
  
              return 1;
  
          }
  
      }
  
  
  
      /* Write the stream header, if any. */
  
      ret = avformat_write_header(oc, NULL);
  
      if (ret < 0) {
  
          fprintf(stderr, "Error occurred when opening output file: %s\n",
  
                  av_err2str(ret));
  
          return 1;
  
      }
  
  
  
      flush = 0;
  
      while ((video_st && !video_is_eof) || (audio_st && !audio_is_eof)) {
  
          /* Compute current audio and video time. */
  
          audio_time = (audio_st && !audio_is_eof) ? audio_st->pts.val *
  
  av_q2d(audio_st->time_base) : INFINITY;
  
          video_time = (video_st && !video_is_eof) ? video_st->pts.val *
  
  av_q2d(video_st->time_base) : INFINITY;
  
  
  
          if (!flush &&
  
              (!audio_st || audio_time >= STREAM_DURATION) &&
  
              (!video_st || video_time >= STREAM_DURATION)) {
  
              flush = 1;
  
          }
  
  
  
          /* write interleaved audio and video frames */
  
          if (audio_st && !audio_is_eof && audio_time <= video_time) {
  
              write_audio_frame(oc, audio_st, flush);
  
          } else if (video_st && !video_is_eof && video_time < audio_time) {
  
              write_video_frame(oc, video_st, flush);
  
          }
  
      }
  
  
  
      /* Write the trailer, if any. The trailer must be written before you
  
       * close the CodecContexts open when you wrote the header; otherwise
  
       * av_write_trailer() may try to use memory that was freed on
  
       * av_codec_close(). */
  
      av_write_trailer(oc);
  
  
  
      /* Close each codec. */
  
      if (video_st)
  
          close_video(oc, video_st);
  
      if (audio_st)
  
          close_audio(oc, audio_st);
  
  
  
      if (!(fmt->flags & AVFMT_NOFILE))
  
          /* Close the output file. */
  
          avio_close(oc->pb);
  
  
  
      /* free the stream */
  
      avformat_free_context(oc);
  
  
  
      return 0;
  
  }  

  and, in order to avoid a warning about channel layout not specified, I
  added :

  c->channel_layout = av_get_default_channel_layout(c->channels);
  
  
  
  in function AVStream *add_stream(AVFormatContext *oc, AVCodec **codec,
  
                          enum AVCodecID codec_id)

  just under the row c->channels = 2 ;

  I also raised a ffserver with the following configuration (showing only
  feed lines) :

  <feed>
  
          File /tmp/feed1.ffm
  
          FileMaxSize 1GB
  
          ACL allow 127.0.0.1
  
          ACL allow 192.168.0.0 192.168.255.255
  
  </feed>

  ffserver is working fine if I feed it with a ffmpeg commandline, e.g :

  ffmpeg -r 25 -i movie.mp4 -acodec libfdk_aac  -ab 128k -vcodec libx264 -fpre libx264-fast.ffpreset http://localhost:8090/feed1.ffm

  But with my example, I can write only few frames and after that may muxing
  modified program ends with :

  Error while writing video frame : Connection reset by peer

  I tried also different codecs (h264) and format (flv), turning out in a
  different number of frames written, but eventually I got the same error
  above.

  ffserver do not reports errors at all, only write:
  
  Tue Mar  4 12:55:10 2014 127.0.0.1 - - [POST] "/feed1.ffm HTTP/1.1" 200 4096
  
  confirming that the communication socket was open

  What am i missing ??

  Thanks