On Tue, May 16, 2017 at 04:48:15PM +0200, Victor Toso wrote:
> From: Victor Toso <me@xxxxxxxxxxxxxx>
>
> As the comment states, incomplete GstCaps for h264 could trigger
> errors in h264parse element, such as:
>
> gst_h264_parse_set_caps: video/x-h264 caps without
> codec_data or stream-format
>
> This would make h264parse to ignore the capabilities that were set.
>
> As spice-server is encoding as byte-stream it should be fine to set
> this value here too.
>
> Any other errors to h264 format should either be reported to
> GStreamer or fixed by improving the spice-protocol.
>
> The follow up patch will identify elements in GstRegistry based on
> GstCaps so this is a necessary change to have.
>
> This is also a preparatory patch to use Playbin element to create the
> pipeline. Without this, Playbin or typefind will fail to recognize the
> stream as H264.
>
> Signed-off-by: Victor Toso <victortoso@xxxxxxxxxx>
> Signed-off-by: Victor Toso <me@xxxxxxxxxxxxxx>
> ---
> src/channel-display-gst.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/src/channel-display-gst.c b/src/channel-display-gst.c
> index 538e75a..73c2d25 100644
> --- a/src/channel-display-gst.c
> +++ b/src/channel-display-gst.c
> @@ -68,10 +68,11 @@ static struct {
> { "vp8dec", "caps=video/x-vp8" },
>
> /* SPICE_VIDEO_CODEC_TYPE_H264
> - * h264 streams detection works fine and setting an incomplete cap
> - * causes errors. So let typefind do all the work.
> + * If setting video/x-h264, h264parse will complain if we don't have the
"When setting .." ?
> + * stream-format or codec_data information. As stream-format is byte-stream
> + * (hardcodec in spice-server), let add it to avoid the warning.
"hardcoded", "let's add it here"
Not really sure about the implications, meaning, ..., but why not,
Acked-by: Christophe Fergeau <cfergeau@xxxxxxxxxx>
> */
> - { "h264parse ! avdec_h264", "" },
> + { "h264parse ! avdec_h264", "caps=video/x-h264,stream-format=byte-stream" },
>
> /* SPICE_VIDEO_CODEC_TYPE_VP9 */
> { "vp9dec", "caps=video/x-vp9" },
> --
> 2.13.0
>
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