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• lavfi/drawtext : ignore final LF of textfile.

  30 novembre 2020, par Nicolas George

  lavfi/drawtext : ignore final LF of textfile.
  A standard text file ends with a final LF.
  
  Without this change, it is interpreted as an empty final line,
  
  and visible with the box option.
  
  The current behavior can be achieved by actually having
  
  an empty line at the end of the file.
  Fix trac ticket #7948.
  

  • [DH] libavfilter/vf_drawtext.c

• Android ffmpeg using

  6 juin 2012, par Vardan Gevorgyan

  I have successfully compiled ffmpeg for android.
  I have wrote simple application which just open mp4 file :

  int main(int argc, char * argv[]) 
  
  {
  
      av_register_all();
  
  
  
      __android_log_write(ANDROID_LOG_INFO, "NDK", "Opening file: /sdcard/test.mp4...");
  
  
  
      if (avformat_open_input(&pFormatCtx, "/sdcard/test.mp4", NULL, NULL) != 0) {
  
          __android_log_write(ANDROID_LOG_INFO, "NDK", "file not opened\n");
  
          return -1;
  
      }
  
      __android_log_write(ANDROID_LOG_INFO, "NDK", "file opened\n");
  
  }

  When I run this code the C code crashes here :

  06-06 18:22:42.629: I/DEBUG(31):          #00  pc 00159804  /data/data libffmpeg.so
  
  06-06 18:22:42.629: I/DEBUG(31):          #01  lr 809465dc  /data/data libffmpeg.so

  ndk-stack write :

  Stack frame #00  pc 00159804  /data/data/.../lib/libffmpeg.so: Routine av_opt_set_dict in libavutil/opt.c:552

  Which is av_opt_set_dict function :

  int av_opt_set_dict(void *obj, AVDictionary **options)
  
  {
  
      AVDictionaryEntry *t = NULL;
  
      AVDictionary    *tmp = NULL;
  
      int ret = 0;
  
  
  
      while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {
  
          ret = av_set_string3(obj, t->key, t->value, 1, NULL);
  
          if (ret == AVERROR_OPTION_NOT_FOUND)
  
              av_dict_set(&tmp, t->key, t->value, 0);
  
          else if (ret < 0) {
  
              av_log(obj, AV_LOG_ERROR, "Error setting option %s to value %s.\n", t->key, t->value);
  
              break;
  
          }
  
          ret = 0;
  
      }
  
      av_dict_free(options);
  
      *options = tmp;
  
      return ret;
  
  }

  552 line is :

  while ((t = av_dict_get(*options, "", t, AV_DICT_IGNORE_SUFFIX))) {

  This code working on my linux machine (of course with .so for linux, for android I use ndk built .so file), but not under android.

  Also, it's working on my rooted HTC Desire Z, but not on emulator or un-rooted device.

  Here I found the post that I need to change libavformat/file.c file_check function :

  static int file_check(URLContext *h, int mask)
  
  {
  
      struct stat st;
  
      int ret = stat(h->filename, &st);
  
      if (ret < 0)
  
          return AVERROR(errno);
  
  
  
      ret |= st.st_mode&S_IRUSR ? mask&AVIO_FLAG_READ  : 0;
  
      ret |= st.st_mode&S_IWUSR ? mask&AVIO_FLAG_WRITE : 0;
  
  
  
      return ret;
  
  }

  to

  static int file_check(URLContext *h, int mask)
  
  {
  
      struct stat st;
  
      int ret = stat(h->filename, &st);
  
      if (ret < 0)
  
          return AVERROR(errno);
  
  
  
      ret |= st.st_mode&S_IRUSR ? mask&AVIO_FLAG_READ  : 0;
  
      ret |= st.st_mode&S_IRGRP ? mask&AVIO_FLAG_READ  : 0;
  
      ret |= st.st_mode&S_IROTH ? mask&AVIO_FLAG_READ  : 0;
  
      ret |= st.st_mode&S_IWUSR ? mask&AVIO_FLAG_WRITE : 0;
  
      ret |= st.st_mode&S_IWGRP ? mask&AVIO_FLAG_WRITE  : 0;
  
      ret |= st.st_mode&S_IWOTH ? mask&AVIO_FLAG_WRITE  : 0;
  
  
  
  
  
      return ret;
  
  }

  but it wasn't help.

  Any suggestions ?

  Thanks

• Anomalie #4513 (Fermé) : Undefined au post d’un message de forum public

  6 juillet 2021, par cedric -

  Corrigé par https://git.spip.net/spip/forum/commit/e9a254c4638853e0cde99391adfdebec94c20017 donc