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new 4a390fcd20 avformat/rtpenc: validate MPEG-TS RTP payload size
4a390fcd20 is described below
commit 4a390fcd2081c198b57c515c9c0b1efde3585fc2
Author: Devraj Ajmera <[email protected]>
AuthorDate: Tue Mar 3 00:54:40 2026 +0530
Commit: Michael Niedermayer <[email protected]>
CommitDate: Sat Mar 7 12:17:27 2026 +0100
avformat/rtpenc: validate MPEG-TS RTP payload size
Ensure that the RTP payload size is at least one TS packet
(188 bytes) when packetizing MPEG-TS.
Previously, small payload sizes were silently rounded up,
which could lead to incorrect behavior. Return EINVAL
with a clear error message instead.
Signed-off-by: Devraj Ajmera <[email protected]>
Signed-off-by: Michael Niedermayer <[email protected]>
---
libavformat/rtpenc.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/libavformat/rtpenc.c b/libavformat/rtpenc.c
index 6d8e95f4c3..1d4b00a0f4 100644
--- a/libavformat/rtpenc.c
+++ b/libavformat/rtpenc.c
@@ -178,9 +178,16 @@ static int rtp_write_header(AVFormatContext *s1)
case AV_CODEC_ID_MPEG2VIDEO:
break;
case AV_CODEC_ID_MPEG2TS:
+ if (s->max_payload_size < TS_PACKET_SIZE) {
+ av_log(s1, AV_LOG_ERROR,
+ "RTP payload size %u too small for MPEG-TS "
+ "(minimum %d bytes required)\n",
+ s->max_payload_size, TS_PACKET_SIZE);
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+
n = s->max_payload_size / TS_PACKET_SIZE;
- if (n < 1)
- n = 1;
s->max_payload_size = n * TS_PACKET_SIZE;
break;
case AV_CODEC_ID_DIRAC:
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