swscale/swscale_unscaled: fix ya16 input

[ffmpeg] / ffmpeg_filter.c

diff --git a/ffmpeg_filter.c b/ffmpeg_filter.c
index 50ee422c6c89b67b10cbe79cc5066910c389fb1f..b6dc42fe7dba0a4d4e395ed240aba7ab5fb90202 100644 (file)
--- a/ffmpeg_filter.c
+++ b/ffmpeg_filter.c
@@ -830,6 +830,12 @@ static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
     av_freep(&ifilter->name);
     DESCRIBE_FILTER_LINK(ifilter, in, 1);
 
+    if (!ifilter->ist->dec) {
+        av_log(NULL, AV_LOG_ERROR,
+               "No decoder for stream #%d:%d, filtering impossible\n",
+               ifilter->ist->file_index, ifilter->ist->st->index);
+        return AVERROR_DECODER_NOT_FOUND;
+    }
     switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
     case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
     case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);