#11531: Audio stream not muxed with -c:a copy from RTSP
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Reporter: HelFix | Type: defect
Status: new | Priority: normal
Component: ffmpeg | Version: 7.1
Keywords: AAC FFmpeg | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug:
-How to reproduce:
- Use the following command with an RTSP stream:
{{{
ffmpeg -rtsp_transport tcp -i
rtsp://admin:admin@10.15.129.19:554/Streaming/Channels/102 -c:v copy -c:a
copy output.mp4
}}}
- Test with:
ffmpeg-n7.1-39-g64e2864cb9-linux64-gpl-7.1 or 6.1.1 (works).
ffmpeg-n7.1-62-gb168ed9b14-linux64-gpl-7.1 and newer (fails).
- Expected Behavior:
Both video and audio streams are muxed into output.mp4. In n7.1-39,
ffprobe shows:
Video: h264, 1920x536, ~20 fps.
Audio: aac, 32000 Hz, mono.
- Actual Behavior:
In n7.1-62:
Video is muxed (e.g., 219 packets, 2116297 bytes).
Audio is read (e.g., 366 packets, 39746 bytes) but not muxed (0 packets, 0
bytes).
Example log from a similar 7.1 failure:
{{{
[in#0/rtsp] Input stream #0:1 (audio): 366 packets read (39746 bytes);
[out#0/mp4] Output stream #0:1 (audio): 0 packets muxed (0 bytes);
}}}
{{{
[rtsp @ 0x6044978bfbc0] SDP:
v=0
o=- 1743073449707371 1743073449707371 IN IP4 10.15.129.19
s=Media Presentation
e=NONE
b=AS:5100
t=0 0
a=control:rtsp://10.15.129.19:554/Streaming/Channels/102/
m=video 0 RTP/AVP 96
c=IN IP4 0.0.0.0
b=AS:5000
a=recvonly
a=x-dimensions:1920,536
a=control:rtsp://10.15.129.19:554/Streaming/Channels/102/trackID=1
a=rtpmap:96 H264/90000
a=fmtp:96 profile-level-id=420029; packetization-mode=1; sprop-parameter-
sets=Z0IAM4qKUDwCK8v/gACAALZAAAD6AAATiAE=,aM48gA==
m=audio 0 RTP/AVP 104
c=IN IP4 0.0.0.0
b=AS:50
a=recvonly
a=control:rtsp://10.15.129.19:554/Streaming/Channels/102/trackID=2
a=rtpmap:104 mpeg4-generic/32000/1
a=fmtp:104 profile-level-id=15; streamtype=5; mode=AAC-hbr;
config=1288;SizeLength=13; IndexLength=3; IndexDeltaLength=3; Profile=1;
a=Media_header:MEDIAINFO=494D4B48010300000400000101200110007D0000007D000000000000000000000000000000000000;
a=appversion:1.0
}}}
- Environment:
OS: Ubuntu 24.04
Builds: BtbN static Linux 64-bit GPL from https://github.com/BtbN/FFmpeg-
Builds.
Patches should be submitted to the ffmpeg-devel mailing list and not this
bug tracker.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11531>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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