-#elif LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR == 15
-
- AVRational par;
- par.num = sample_aspect_ratio_numerator ();
- par.den = sample_aspect_ratio_denominator ();
-
- if (av_vsrc_buffer_add_frame (_buffer_src_context, frame, 0, par) < 0) {
- throw DecodeError (N_("could not push buffer into filter chain."));
- }
-
-#else
-
- if (av_buffersrc_write_frame (_buffer_src_context, frame) < 0) {
- throw DecodeError (N_("could not push buffer into filter chain."));
- }
-
-#endif
-
-#if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 15 && LIBAVFILTER_VERSION_MINOR <= 61
- while (avfilter_poll_frame (_buffer_sink_context->inputs[0])) {
-#else
- while (av_buffersink_read (_buffer_sink_context, 0)) {
-#endif
-
-#if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 15
-
- int r = avfilter_request_frame (_buffer_sink_context->inputs[0]);
- if (r < 0) {
- throw DecodeError (N_("could not request filtered frame"));
- }
-
- AVFilterBufferRef* filter_buffer = _buffer_sink_context->inputs[0]->cur_buf;
-
-#else
-
- AVFilterBufferRef* filter_buffer;
- if (av_buffersink_get_buffer_ref (_buffer_sink_context, &filter_buffer, 0) < 0) {
- filter_buffer = 0;
- }
-
-#endif
-
- if (filter_buffer) {
- /* This takes ownership of filter_buffer */
- images.push_back (shared_ptr<Image> (new FilterBufferImage ((PixelFormat) frame->format, filter_buffer)));
- }