[FFmpeg-cvslog] avformat/mxfdec: disallow generic seek search

[Marton Balint]

ffmpeg | branch: master | Marton Balint <cus at passwd.hu> | Tue Aug 27 01:08:33 2024 +0200| [90f68f7b2d2c215e98cea1d955fb37605ae89585] | committer: Marton Balint

avformat/mxfdec: disallow generic seek search

If the demuxer does not provide per-stream indexes, the generic seek search can
attempt to read the whole media file from the beginning when seeking. For large
MXF files this can cause huge lockups for a seek after the last timestamp,
which will eventually fail. So let's disable the generic seek for mxf, the
demuxer's own seek code should handle seeking just fine.

Signed-off-by: Marton Balint <cus at passwd.hu>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=90f68f7b2d2c215e98cea1d955fb37605ae89585
---

 libavformat/mxfdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index af0c8a3100..ac63c0d5ad 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -4274,7 +4274,7 @@ static const AVClass demuxer_class = {
 const FFInputFormat ff_mxf_demuxer = {
     .p.name         = "mxf",
     .p.long_name    = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
-    .p.flags        = AVFMT_SEEK_TO_PTS,
+    .p.flags        = AVFMT_SEEK_TO_PTS | AVFMT_NOGENSEARCH,
     .p.priv_class   = &demuxer_class,
     .priv_data_size = sizeof(MXFContext),
     .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,