accel: disable nvdec for now

Nvdec shows a lot of artifacts. Disable until fixed.

Change-Id: I8df7e6072005c1bc0c19f820cec437c877c6e63a

src/media/video/accel.cpp

@@ -261,7 +261,8 @@ std::unique_ptr<HardwareAccel>
 HardwareAccel::setupDecoder(AVCodecID id, int width, int height)
 {
     static const HardwareAPI apiList[] = {
-        { "nvdec", AV_PIX_FMT_CUDA, AV_PIX_FMT_NV12, { AV_CODEC_ID_H264, AV_CODEC_ID_H265, AV_CODEC_ID_VP8, AV_CODEC_ID_MJPEG } },
+        // TODO Find out why nvdec decoding doesn't quite work
+        //{ "nvdec", AV_PIX_FMT_CUDA, AV_PIX_FMT_NV12, { AV_CODEC_ID_H264, AV_CODEC_ID_H265, AV_CODEC_ID_VP8, AV_CODEC_ID_MJPEG } },
         { "vaapi", AV_PIX_FMT_VAAPI, AV_PIX_FMT_NV12, { AV_CODEC_ID_H264, AV_CODEC_ID_MPEG4, AV_CODEC_ID_VP8, AV_CODEC_ID_MJPEG } },
         { "vdpau", AV_PIX_FMT_VDPAU, AV_PIX_FMT_NV12, { AV_CODEC_ID_H264, AV_CODEC_ID_MPEG4 } },
         { "videotoolbox", AV_PIX_FMT_VIDEOTOOLBOX, AV_PIX_FMT_NV12, { AV_CODEC_ID_H264, AV_CODEC_ID_MPEG4 } },