Re: [FFmpeg-devel] [PATCH] avcodec/mjpegdec: add frame threading for mjpeg decoder

From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH] avcodec/mjpegdec: add frame threading for mjpeg decoder
Date: Thu, 7 Sep 2023 23:17:37 +0200
Message-ID: <20230907211737.GQ8640@pb2> (raw)
In-Reply-To: <CAPYw7P7cqQ6ntr-J6L1HbBLNnTsHw3=55fywKzW7Ub4fDpfTfA@mail.gmail.com>


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On Thu, Sep 07, 2023 at 06:44:40PM +0200, Paul B Mahol wrote:
> Attached.

>  mjpegdec.c |    8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> f65de11bf58ea36b071c3501d4fa700d242edf21  0001-avcodec-mjpegdec-add-frame-threading-for-mjpeg-decod.patch
> From 2cff86b07b56d2923f60923e7dd21a546c2cc6fa Mon Sep 17 00:00:00 2001
> From: Paul B Mahol <onemda@gmail.com>
> Date: Thu, 7 Sep 2023 18:42:03 +0200
> Subject: [PATCH] avcodec/mjpegdec: add frame threading for mjpeg decoder
> 
> Signed-off-by: Paul B Mahol <onemda@gmail.com>
> ---
>  libavcodec/mjpegdec.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)

./ffmpeg  -v -1 -i tickets/1915/m_noint.avi -f framecrc -an -t 1 -
Here the timestamps change and the files output does not look healthy
(looks as if one field is behind)

@@ -645,18 +645,22 @@
 #codec_id 0: rawvideo
 #dimensions 0: 640x480
 #sar 0: 0/1
-0,          0,          0,        1,   614400, 0x51734de4
-0,          2,          2,        1,   614400, 0x9dfe6e90
-0,          4,          4,        1,   614400, 0x16d1f0d5
-0,          6,          6,        1,   614400, 0x67cbb0f0
-0,          8,          8,        1,   614400, 0x40f5223e
-0,         10,         10,        1,   614400, 0xef9a9ba8
-0,         12,         12,        1,   614400, 0x415cb69a
-0,         14,         14,        1,   614400, 0xbebf1993
-0,         16,         16,        1,   614400, 0xe4495f0f
-0,         18,         18,        1,   614400, 0x05a06480
-0,         20,         20,        1,   614400, 0x323bb5eb
-0,         22,         22,        1,   614400, 0x941b44ff
+0,          0,          0,        1,   614400, 0xb7f88313
+0,          1,          1,        1,   614400, 0xeda529e0
+0,          2,          2,        1,   614400, 0x29d53819
+0,          3,          3,        1,   614400, 0x95619af7
+0,          4,          4,        1,   614400, 0xfadb0437
+0,          5,          5,        1,   614400, 0xb2efa298
+0,          6,          6,        1,   614400, 0x8f4312c6
+0,          7,          7,        1,   614400, 0x8968e329
+0,          8,          8,        1,   614400, 0x545954c5
+0,          9,          9,        1,   614400, 0x144cd0b3
+0,         10,         10,        1,   614400, 0x5cd10fe0
+0,         11,         11,        1,   614400, 0x81b8473c
+0,         12,         12,        1,   614400, 0x58808c89
+0,         13,         13,        1,   614400, 0x21371f9f
+0,         14,         14,        1,   614400, 0x7533cd2a
+0,         15,         15,        1,   614400, 0xc2e8ec09




[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I have often repented speaking, but never of holding my tongue.
-- Xenocrates

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