[FFmpeg-devel] [PATCH] VP8 de/encode via libvpx

[Vladimir Pantelic]

James Zern wrote:

+    if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) {
+        if (img->fmt != IMG_FMT_I420) {
+            av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d)\n",
+                   img->fmt);
+            return AVERROR_INVALIDDATA;
+        }
+

hmm, reading your simple_decoder.c I see:

         while((img = vpx_codec_get_frame(&codec, &iter))) {                   //
             unsigned int plane, y;

             for(plane=0; plane < 3; plane++) {                                //
                 unsigned char *buf =img->planes[plane];                       //
                                                                               //
                 for(y=0; y<img->d_h >> (plane?1:0); y++) {                    //
                     fwrite(buf, 1, img->d_w >> (plane?1:0), outfile);         //
                     buf += img->stride[plane];                                //
                 }                                                             //
             }                                                                 //
         }

which implies there could be several frames output per decode call, is that the
case? If yes, how do you handle that in the ffmpeg wrapper?