Recherche avancée

Sur d’autres sites (8220)

• avformat/mpjpegdec : Fix "libavformat/mpjpegdec.c:269:9 : warning : passing argument...

  4 décembre 2015, par Michael Niedermayer

  avformat/mpjpegdec : Fix "libavformat/mpjpegdec.c:269:9 : warning : passing argument 3 of av_stristart from incompatible pointer type"
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/mpjpegdec.c

• linking libavcodec os x ffmpeg ApplicationServices.framework

  30 décembre 2015, par Grady Player

  Here is my error : (newer version of ffmpeg)

  dyld: Library not loaded: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices
  
    Referenced from: /Users/me/path/to/lib/libavcodec.dylib
  
    Reason: Incompatible library version: libavcodec.dylib requires version 64.0.0 or later, but ApplicationServices provides version 1.0.0

  I have read the questions on SO that say you need to link ApplicationServices.framework... which I have done, it makes no difference...

  I have searched for other versions of that framework :

  $ mdfind ApplicationServices.framework
  
  /System/Library/Frameworks/ApplicationServices.framework

  just one...

  so then inspecting frameworks...

  $ otool -L /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices 
  
  /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices:
  
      /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices (compatibility version 1.0.0, current version 48.0.0)
  
      /System/Library/Frameworks/CoreGraphics.framework/Versions/A/CoreGraphics (compatibility version 64.0.0, current version 600.0.0)
  
  ...

  and libavcodec

  otool -L ../lib/libavcodec.dylib 
  
  ../lib/libavcodec.dylib:
  
      libavcodec.dylib (compatibility version 56.0.0, current version 56.60.100)
  
      @loader_path/libswresample.dylib (compatibility version 1.0.0, current version  ...
  
  ...
  
  /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices (compatibility version 64.0.0, current version 600.0.0)

  I am compiling everything with -mmacosx-version-min=10.7

  so maybe a bug in the toolchain ?

  compiler :

  clang -v
  
  Apple LLVM version 7.0.2 (clang-700.1.81)
  
  Target: x86_64-apple-darwin15.2.0
  
  Thread model: posix

  linker :

  ld -v
  
  @(#)PROGRAM:ld  PROJECT:ld64-253.9
  
  configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h armv6m armv7k armv7m armv7em (tvOS)
  
  LTO support using: Apple LLVM 7.0.2 (clang-700.1.81)

• FFMpeg copy streams without transcode

  8 juin 2016, par Zelid

  I’m trying to copy all streams from several files into one file without transcoding streams. Something you usually do with ffmpeg utility by ffmpeg -i “file_with_audio.mp4” -i “file_with_video.mp4” -c copy -shortest file_with_audio_and_video.mp4

  This is the code :

  int ffmpegOpenInputFile(const char* filename, AVFormatContext **ic) {
  
  
  
      int ret;
  
      unsigned int i;
  
  
  
      *ic = avformat_alloc_context();
  
      if (!(*ic))
  
          return -1; // Couldn't allocate input context
  
  
  
      if((ret = avformat_open_input(ic, filename, NULL, NULL)) < 0)
  
          return ret; // Couldn't open file
  
  
  
      // Get format info (retrieve stream information)
  
      if ((ret = avformat_find_stream_info(*ic, NULL)) < 0)
  
          return ret; // Couldn't find stream information
  
  
  
      for (int i = 0; i < (*ic)->nb_streams; i++) {
  
          AVStream *stream;
  
          AVCodecContext *codec_ctx;
  
          stream = (*ic)->streams[i];
  
          codec_ctx = stream->codec;
  
          /* Reencode video & audio and remux subtitles etc. */
  
          if (codec_ctx->codec_type == AVMEDIA_TYPE_VIDEO
  
              || codec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
  
              /* Open decoder */
  
              ret = avcodec_open2(codec_ctx,
  
                                  avcodec_find_decoder(codec_ctx->codec_id), NULL);
  
              if (ret < 0) {
  
                  av_log(NULL, AV_LOG_ERROR, "Failed to open decoder for stream #%u\n", i);
  
                  return ret;
  
              }
  
          }
  
      }
  
  
  
      // Dump information about file onto standard error
  
      av_dump_format(*ic, 0, filename, 0);
  
  
  
      return 0;
  
  }
  
  
  
  
  
  
  
  int main(int argc, char *argv[]) {
  
  
  
      const char *inputFilename1 = "/avfiles/video_input.mp4";
  
      const char *inputFilename2 = "/avfiles/audio_input.mp4";
  
      const char *filename = "/avfiles/out.mp4";
  
  
  
      int ret;
  
  
  
      av_register_all();
  
  
  
      AVFormatContext *ic1 = nullptr;
  
      AVFormatContext *ic2 = nullptr;
  
      AVFormatContext *oc = nullptr;
  
  
  
      if ((ret = ffmpegOpenInputFile(inputFilename1, &ic1)) < 0)
  
          return ret;  // and free resources and
  
  
  
      if ((ret = ffmpegOpenInputFile(inputFilename2, &ic2)) < 0)
  
          return ret;  // and free resources and
  
  
  
      AVOutputFormat *outfmt = av_guess_format(NULL, filename, NULL);
  
      if (outfmt == NULL)
  
          return -1;  // Could not guess output format
  
  
  
      avformat_alloc_output_context2(&oc, outfmt, NULL, filename);
  
      if (!oc)
  
          return AVERROR_UNKNOWN;  // Could not create output context
  
  
  
      // populate input streams from all input files
  
      AVStream **input_streams = NULL;
  
      int nb_input_streams = 0;
  
      for (int i = 0; i < ic1->nb_streams; i++) {
  
          input_streams = (AVStream **) grow_array(input_streams, sizeof(*input_streams), &nb_input_streams,
  
                                                   nb_input_streams + 1);
  
          input_streams[nb_input_streams - 1] = ic1->streams[i];
  
      }
  
      for (int i = 0; i < ic2->nb_streams; i++) {
  
          input_streams = (AVStream **) grow_array(input_streams, sizeof(*input_streams), &nb_input_streams,
  
                                                   nb_input_streams + 1);
  
          input_streams[nb_input_streams - 1] = ic2->streams[i];
  
      }
  
  
  
      for (int i = 0; i < nb_input_streams; i++) {
  
          AVStream *ist = input_streams[i];  // could be named 'm_in_vid_strm'
  
  
  
          // if output context has video codec support and current input stream is video
  
          if (/*oc->video_codec_id*/ oc->oformat->video_codec != AV_CODEC_ID_NONE && ist != NULL
  
                                     && ist->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
  
  
  
              AVCodec *out_vid_codec = avcodec_find_encoder(oc->oformat->video_codec);
  
              if (NULL == out_vid_codec)
  
                  return -1;  // Couldn't find video encoder
  
  
  
              AVStream *m_out_vid_strm = avformat_new_stream(oc, out_vid_codec);
  
              if (NULL == m_out_vid_strm)
  
                  return -1;  // Couldn't output video stream
  
  
  
              m_out_vid_strm->id = 0;  // XXX:
  
  
  
              ret = avcodec_copy_context(m_out_vid_strm->codec, ist->codec);
  
              if (ret < 0)
  
                  return ret;  // Failed to copy context
  
  
  
          }
  
  
  
          // if output context has audio codec support and current input stream is audio
  
          if (/*oc->audio_codec_id*/ oc->oformat->audio_codec != AV_CODEC_ID_NONE && ist != NULL
  
                                     && ist->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
  
  
  
              AVCodec *out_aud_codec = avcodec_find_encoder(oc->oformat->audio_codec);
  
              if (nullptr == out_aud_codec)
  
                  return -1;  // couldn't find audio codec
  
  
  
              AVStream *m_out_aud_strm = avformat_new_stream(oc, out_aud_codec);
  
              if (nullptr == m_out_aud_strm)
  
                  return -1;  // couldn't allocate audio out stream
  
  
  
              ret = avcodec_copy_context(m_out_aud_strm->codec, ist->codec);
  
              if (ret < 0)
  
                  return ret;  // couldn't copy context
  
  
  
          }
  
      }
  
  
  
      // finally output header
  
      if (!(oc->flags & AVFMT_NOFILE)) {
  
  
  
          ret = avio_open(&oc->pb, filename, AVIO_FLAG_WRITE);
  
          if (ret < 0)
  
              return ret;  // Could not open output file
  
  
  
          av_dump_format(oc, 0, filename, 1);
  
  
  
          ret = avformat_write_header(oc, NULL);
  
          if (ret < 0)
  
              return ret; // Error occurred when opening output file
  
  
  
      }
  
  
  
      return 0;
  
  
  
  }

  avformat_write_header(oc, NULL); always return error and I see this messages :

  [mp4 @ 0x7f84ec900a00] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
  
  [mp4 @ 0x7f84ec900a00] Tag avc1/0x31637661 incompatible with output codec id '28' ([33][0][0][0])

  But input and output streams match :

  Input streams from 2 files:
  
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 2834 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc (default)
  
  Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
  
  
  
  Output #0, mp4, to '/Users/alex/Workspace/_qt/tubisto/avfiles/out.mp4':
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 2834 kb/s, 47.95 tbc
  
      Stream #0:1: Audio: aac (libvo_aacenc) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s

  Why the error with incompatible output codec happens ?
  What is wrong in my code and how to make it work to copy all streams from all input files to output file ?