[FFmpeg-devel] [PATCH] ffmpeg/qsv: fix QSV-accelerated transcode performance drop issue

Ivan Uskov ivan.uskov at nablet.com
Tue Aug 16 11:45:52 EEST 2016


Hello Jun,

Thursday, August 11, 2016, 10:59:51 AM, you wrote:

> From cafa70e97ce48b65e2a4a99782f6ce3557fef755 Mon Sep 17 00:00:00 2001
> From: Jun Zhao <mypopydev at gmail.com>
> Date: Thu, 11 Aug 2016 15:34:01 +0800
> Subject: [PATCH] ffmpeg/qsv: fix QSV-accelerated transcode performance drop
>  issue.

> the merge commit 1b04ea1 "avconv: create simple filtergraphs earlier"
> will init the filtergraphs earlier, then init the QSV transcode can't
> suppose the nb_filters's value, else lead to the QSV transcode performance
> drop.

> Signed-off-by: Jun Zhao <mypopydev at gmail.com>
> ---
>  ffmpeg_qsv.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)

> diff --git a/ffmpeg_qsv.c b/ffmpeg_qsv.c
> index 95a2351..acc54dd 100644
> --- a/ffmpeg_qsv.c
> +++ b/ffmpeg_qsv.c
> @@ -210,8 +210,7 @@ int qsv_transcode_init(OutputStream *ost)
>  
>      /* check if the decoder supports QSV and the output only goes to this stream */
>      ist = input_streams[ost->source_index];
-    if (ist->nb_filters || ist->hwaccel_id != HWACCEL_QSV ||
-        !ist->dec || !ist->dec->pix_fmts)
+    if (ist->hwaccel_id != HWACCEL_QSV || !ist->dec || !ist->dec->pix_fmts)
>          return 0;
>      for (pix_fmt = ist->dec->pix_fmts; *pix_fmt != AV_PIX_FMT_NONE; pix_fmt++)
>          if (*pix_fmt == AV_PIX_FMT_QSV)
Thank, makes sense.
LGTM.


-- 
Best regards,
 Ivan                            mailto:ivan.uskov at nablet.com



More information about the ffmpeg-devel mailing list