[FFmpeg-cvslog] aformat/movenc: add missing padding to output track extradata

James Almer git at videolan.org
Thu May 5 23:33:37 EEST 2022


ffmpeg | branch: release/2.8 | James Almer <jamrial at gmail.com> | Wed Sep 25 14:21:07 2019 -0300| [02161c6ed194ddfa00fd2af7684a8099852bc3ce] | committer: Michael Niedermayer

aformat/movenc: add missing padding to output track extradata

Fixes ticket #8183.

Tested-by: Thierry Foucu <tfoucu at gmail.com>
Signed-off-by: James Almer <jamrial at gmail.com>
(cherry picked from commit 58aa0ed8f10753ee90f4a4a1f4f3da803cf7c145)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=02161c6ed194ddfa00fd2af7684a8099852bc3ce
---

 libavformat/movenc.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index f600285862..e73d5a3cdb 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -4398,12 +4398,13 @@ int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt)
         !TAG_IS_AVCI(trk->tag) &&
         (enc->codec_id != AV_CODEC_ID_DNXHD)) {
         trk->vos_len  = enc->extradata_size;
-        trk->vos_data = av_malloc(trk->vos_len);
+        trk->vos_data = av_malloc(trk->vos_len + AV_INPUT_BUFFER_PADDING_SIZE);
         if (!trk->vos_data) {
             ret = AVERROR(ENOMEM);
             goto err;
         }
         memcpy(trk->vos_data, enc->extradata, trk->vos_len);
+        memset(trk->vos_data + trk->vos_len, 0, AV_INPUT_BUFFER_PADDING_SIZE);
     }
 
     if (enc->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
@@ -4452,12 +4453,13 @@ int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt)
          enc->codec_id == AV_CODEC_ID_AC3) && !trk->vos_len) {
         /* copy frame to create needed atoms */
         trk->vos_len  = size;
-        trk->vos_data = av_malloc(size);
+        trk->vos_data = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
         if (!trk->vos_data) {
             ret = AVERROR(ENOMEM);
             goto err;
         }
         memcpy(trk->vos_data, pkt->data, size);
+        memset(trk->vos_data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
     }
 
     if (trk->entry >= trk->cluster_capacity) {
@@ -4962,12 +4964,13 @@ static int mov_create_dvd_sub_decoder_specific_info(MOVTrack *track,
         cur += strspn(cur, "\n\r");
     }
     if (have_palette) {
-        track->vos_data = av_malloc(16*4);
+        track->vos_data = av_malloc(16*4 + AV_INPUT_BUFFER_PADDING_SIZE);
         if (!track->vos_data)
             return AVERROR(ENOMEM);
         for (i = 0; i < 16; i++) {
             AV_WB32(track->vos_data + i * 4, palette[i]);
         }
+        memset(track->vos_data + 16*4, 0, AV_INPUT_BUFFER_PADDING_SIZE);
         track->vos_len = 16 * 4;
     }
     st->codec->width = width;
@@ -5226,12 +5229,13 @@ static int mov_write_header(AVFormatContext *s)
                 mov_create_dvd_sub_decoder_specific_info(track, st);
             else if (!TAG_IS_AVCI(track->tag) && st->codec->codec_id != AV_CODEC_ID_DNXHD) {
                 track->vos_len  = st->codec->extradata_size;
-                track->vos_data = av_malloc(track->vos_len);
+                track->vos_data = av_malloc(track->vos_len + AV_INPUT_BUFFER_PADDING_SIZE);
                 if (!track->vos_data) {
                     ret = AVERROR(ENOMEM);
                     goto error;
                 }
                 memcpy(track->vos_data, st->codec->extradata, track->vos_len);
+                memset(track->vos_data + track->vos_len, 0, AV_INPUT_BUFFER_PADDING_SIZE);
             }
         }
     }



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