only MPEG2 swdec enabled

[courville]

For now enabling hwdec for MPEG2 video resultins in jerky video with A/V sync issues in native/avos:

commit ab3236404c2f5f52fa1b29ec24d1690d4f593db9
Refs: [nova]
Author:     Marc de Courville <marc@courville.org>
AuthorDate: Wed Feb 20 21:47:38 2019 +0100
Commit:     Marc de Courville <marc@courville.org>
CommitDate: Wed Feb 20 21:47:38 2019 +0100

    enable mpeg2 via sfdec, since capability check is now enforced (revert of an old commit)
---
 Source/codec_sfdec2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/codec_sfdec2.c b/Source/codec_sfdec2.c
index 5cdf60e..6f07b4a 100644
--- a/Source/codec_sfdec2.c
+++ b/Source/codec_sfdec2.c
@@ -939,7 +939,7 @@ static STREAM_DEC_VIDEO *new_dec(void)
 STREAM_REGISTER_DEC_VIDEO( format, 0, MAXW, MAXH, SFDEC_MEDIACODEC, new_dec, "sfdec2", mangler );

 #ifdef CONFIG_OMX_MPEG2
-//OMXC_REGISTER( VIDEO_FORMAT_MPEG, &stream_video_mangler_MPEG2 );
+OMXC_REGISTER( VIDEO_FORMAT_MPEG, &stream_video_mangler_MPEG2 );
 #endif
 #ifdef CONFIG_OMX_MPEG4
 OMXC_REGISTER( VIDEO_FORMAT_MPG4, NULL );

[courville]

cf. https://github.com/nova-video-player/aos-AVP/issues/391 there is no de-interlacing supported on ffmpeg for now.