accel: ignore codec level

Hardware decoding will still be used even if the codec level is unknown
or higher than the hardware's reported supported level.

From FFmpeg: "It's generally a good idea to pass this flag unless you
have a specificreason not to, as hardware tends to under-report
supported levels."

Change-Id: I83614b0eab6166a42973f062e666783c2a8e7627

src/media/video/accel.cpp

@@ -151,6 +151,8 @@ getFormatCb(AVCodecContext* codecCtx, const AVPixelFormat* formats)
             JAMI_DBG() << "Found compatible hardware format for "
                        << avcodec_get_name(static_cast<AVCodecID>(accel->getCodecId()))
                        << " decoder with " << accel->getName();
+            // hardware tends to under-report supported levels
+            codecCtx->hwaccel_flags |= AV_HWACCEL_FLAG_IGNORE_LEVEL;
             return formats[i];
         }
     }