[FFmpeg-devel] [PATCH 4/4] avformat/movenc: Ensure packet is writable before modifying it

From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
To: ffmpeg-devel@ffmpeg.org
Cc: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Subject: [FFmpeg-devel] [PATCH 4/4] avformat/movenc: Ensure packet is writable before modifying it
Date: Mon,  4 Jul 2022 21:15:39 +0200
Message-ID: <DB6PR0101MB221437573A0D43C5630A49AA8FBE9@DB6PR0101MB2214.eurprd01.prod.exchangelabs.com> (raw)
In-Reply-To: <DB6PR0101MB221464460696F93FB6A30FDE8FBE9@DB6PR0101MB2214.eurprd01.prod.exchangelabs.com>

Fixes e.g.

ffmpeg -i fate-suite/h264/bbc2.sample.h264 -c:v rawvideo -map 0:v -frames:v 10 -pix_fmt gray8 -f tee "first.mov|second.mov"

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavformat/movenc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index a4dace7c1d..5608afde42 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -6513,6 +6513,9 @@ static int mov_write_packet(AVFormatContext *s, AVPacket *pkt)
             } else if (trk->par->codec_id == AV_CODEC_ID_RAWVIDEO &&
                        (trk->par->format == AV_PIX_FMT_GRAY8 ||
                        trk->par->format == AV_PIX_FMT_MONOBLACK)) {
+                ret = av_packet_make_writable(pkt);
+                if (ret < 0)
+                    goto fail;
                 for (i = 0; i < pkt->size; i++)
                     pkt->data[i] = ~pkt->data[i];
             }
-- 
2.34.1

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