#11629: Memory Leak in FFmpeg During Extended Processing
-------------------------------------+-------------------------------------
Reporter: mg3242 | Type: defect
Status: new | Priority: critical
Component: ffmpeg | Version: git-
Keywords: | master
leak,vaapi,24/7 transcoding | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
if you run this process with a live tv stream with this input over 24h it
starts leaking memory:
[mpegts @ 000002f95aa59c80] Could not find codec parameters for stream 6
(Unknown: none ([5][0][0][0] / 0x0005)): unknown codec
Consider increasing the value for the 'analyzeduration' (0) and
'probesize' (5000000) options
Input #0, mpegts, from 'http://192.168.4.168/play/a01b':
Duration: N/A, start: 71417.021867, bitrate: N/A
Program 17201
Metadata:
service_name : SRF 1 HD Clear
service_provider:
Stream #0:1[0x65]: Video: h264 (High) ([27][0][0][0] / 0x001B),
yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn
Stream #0:2[0x66](deu): Audio: ac3 ([6][0][0][0] / 0x0006), 48000 Hz,
stereo, fltp, 384 kb/s
Stream #0:3[0x67](eng): Audio: ac3 ([6][0][0][0] / 0x0006), 48000 Hz,
stereo, fltp, 384 kb/s
Stream #0:4[0x68](deu): Audio: ac3 ([6][0][0][0] / 0x0006), 48000 Hz,
stereo, fltp, 192 kb/s (visual impaired) (descriptions)
Stream #0:5[0x69](deu,deu): Subtitle: dvb_teletext (libzvbi_teletextdec)
([6][0][0][0] / 0x0006), 492x250
Stream #0:6[0x6a]: Unknown: none ([5][0][0][0] / 0x0005)
No Program
Stream #0:0[0x12]: Data: epg
Unsupported codec with id 98306 for input stream 0
Unsupported codec with id 0 for input stream 6
i tried to run valgrind to report the leak better, but valgrind and live
stream transcoding does not go well together. please advice how i can get
a log which will help to identify the problem.
i will also compile ffmpeg_g git-master as soon as i know how to log the
leak.
i tried every possible flag out there and found out that only the flag -sn
which removes teletext and teletext subtitles is able to go on transcoding
over the 24h mark.
How to reproduce:
{{{
% ffmpeg -re -y -hwaccel vaapi -hwaccel_device /dev/dri/renderD128
-hwaccel_output_format vaapi -progress pipe:2 -i srt://192.168.4.168:5001
-map 0:v -c:v h264_vaapi -rc_mode QVBR -global_quality 14 -profile:v
constrained_baseline -b:v 2M -maxrate 4M -bufsize 8M -map 0:a:? -q:a 0.7
-c:a aac -ac 2 -ar 48000 -map 0:s:? -c:s copy -f mpegts
udp://239.1.1.11:1234?pkt_size=1316
ffmpeg version 7.1.1 Copyright (c) 2000-2025 the FFmpeg developers
built with gcc 13 (Ubuntu 13.3.0-6ubuntu2~24.04)
configuration: --disable-decoder=amrnb --disable-gnutls --disable-
liblensfun --disable-libopencv --disable-podpages --disable-sndio
--disable-stripping --enable-avfilter --enable-chromaprint --enable-frei0r
--enable-gcrypt --enable-gpl --enable-ladspa --enable-libaom --enable-
libaribb24 --enable-libass --enable-libbluray --enable-libbs2b --enable-
libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-
libdc1394 --enable-libdrm --enable-libdvdnav --enable-libdvdread --enable-
libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi
--enable-libgme --enable-libgsm --enable-libharfbuzz --enable-libiec61883
--enable-libjack --enable-libjxl --enable-libmp3lame --enable-libmysofa
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264
--enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-
libplacebo --enable-libpulse --enable-librabbitmq --enable-librist
--enable-librsvg --enable-librubberband --enable-libshine --enable-
libsmbclient --enable-libsnappy --enable-libsoxr --enable-libspeex
--enable-libsrt --enable-libsvtav1 --enable-libtesseract --enable-
libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc
--enable-libvorbis --enable-libvpx --enable-libwebp --enable-libwebp
--enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid
--enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-
nonfree --enable-openal --enable-opencl --enable-opengl --enable-openssl
--enable-postproc --enable-pthreads --enable-shared --enable-version3
--incdir=/usr/include/x86_64-linux-gnu --libdir=/usr/lib/x86_64-linux-gnu
--prefix=/usr --toolchain=hardened --enable-vaapi --enable-libvpl
--enable-libxavs2 --enable-libdavs2 --enable-libvmaf --enable-librav1e
--enable-libvvenc --enable-libilbc --enable-libklvanc --enable-libfdk-aac
--enable-libkvazaar --enable-omx --cc=x86_64-linux-gnu-gcc --cxx=x86_64
-linux-gnu-g++ --disable-altivec --shlibdir=/usr/lib/x86_64-linux-gnu
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11629>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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