src/filters/subtext/image.cpp:377:23: error: 'AV_ERROR_MAX_STRING_SIZE' was not declared in this scope
         char av_error[AV_ERROR_MAX_STRING_SIZE] = { 0 };
                       ^
src/filters/subtext/image.cpp:380:31: error: 'av_error' was not declared in this scope
         if (!av_strerror(ret, av_error, AV_ERROR_MAX_STRING_SIZE))
                               ^
src/filters/subtext/image.cpp:452:90: error: 'avcodec_get_name' was not declared in this scope
             throw std::string("failed to find decoder for '") + avcodec_get_name(codec_id) + "'.";
                                                                                          ^
src/filters/subtext/image.cpp:461:73: error: 'AV_INPUT_BUFFER_PADDING_SIZE' was not declared in this scope
             d.avctx->extradata = (uint8_t *)av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
                                                                         ^
src/filters/subtext/image.cpp:482:105: error: 'av_opt_get_image_size' was not declared in this scope
     av_opt_get_image_size(fctx->streams[stream_index]->codec, "video_size", 0, &d.vi.width, &d.vi.height);
                                                                                                         ^
src/filters/subtext/image.cpp:484:35: warning: missing initializer for member 'Subtitle::packets' [-Wmissing-field-initializers]
     Subtitle current_subtitle = { };
                                   ^
src/filters/subtext/image.cpp:484:35: warning: missing initializer for member 'Subtitle::start_frame' [-Wmissing-field-initializers]
src/filters/subtext/image.cpp:484:35: warning: missing initializer for member 'Subtitle::end_frame' [-Wmissing-field-initializers]
src/filters/subtext/image.cpp:678:46: error: 'avcodec_get_name' was not declared in this scope
             desc += avcodec_get_name(codec_id);
                                              ^
Makefile:1432: recipe for target 'src/filters/subtext/libsubtext_la-image.lo' failed
make: *** [src/filters/subtext/libsubtext_la-image.lo] Error 1