January 2026 - ffmpeg-user - lists.ffmpeg.org

ffprobe returns wrong "refs" in stream
by Bernhard Döbler 26 Jan '26

26 Jan '26

Hi, on the commandline I call ffprobe -loglevel quiet -of compact=s=_ -select_streams v -show_entries stream=refs video.mp4 and get the result stream_refs=1 When I add an argument, I'm presented with a different result ffprobe -loglevel quiet -of compact=s=_ -select_streams v -show_entries stream=refs -analyze_frames video.mp4 returns stream_refs=16 I took some time and a step debugger. ffprobe calls a function avformat_find_stream_info from its open_input_file Deep down there is a variable avctx that says refs=16 That information is lost. Later, under certain conditions, - if (do_read_frames || do_read_packets) { - the video is read and decoded. Only then, refs is populated with the correct value. I'm wondering why it is output, at all, if I call ffprobe without analyze_frames, when the value is wrong. I saw there's the function codec_close in demux.c that calls ret = avcodec_parameters_from_context(par_tmp, sti->avctx); ret = avcodec_parameters_to_context(avctx_new, par_tmp); avctx_new->pkt_timebase = sti->avctx->pkt_timebase; This looks to me, like you are saving the timebase. Can refs be saved in a similar manner and output as the correct value without analyzing frames? Best, Bernhard

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Re: Why does ffmpeg expose PID 0x1FFF (null packets) as a selectable audio stream on Blu-ray playback?
by 桃源老師 23 Jan '26

23 Jan '26

Hello all, Following up with my findings. 2026年1月21日(水) 11:31 桃源老師 <xanadu6291(a)gmail.com>: > > When playing a Blu-ray ISO / BDMV structure created with tsMuxeR using > ffplay, ffmpeg reports an extra audio stream: > > This behavior is not only visible in ffplay, but also affects mpv, since > it relies on ffmpeg library. > In mpv, the null-packet PID becomes selectable as an audio track, and > switching to it results in silence and potential user confusion. > Playback itself is not broken, but from a UX perspective, it seems > undesirable for null packets to be exposed as audio streams. > I tested the same source using different versions of tsMuxeR: - *tsMuxeR 2.7.0* inserts MPEG-TS NULL packets in the generated BDMV streams, which leads to playback warnings / timing issues in software players. - *tsMuxeR 1.12.14b (final 1.x)* does not insert NULL packets, and the resulting Blu-ray plays back without any issues. The input and Blu-ray structure are identical; only the tsMuxeR version differs. Although NULL packets are valid per MPEG-TS specification, in this case they negatively affect UX. Based on this comparison, the issue comes from a behavior change in tsMuxeR 2.x, not from ffmpeg/ffplay. Just sharing this in case it helps others. Best regards, Togen-Roushi

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Cannot use QSV on Intel 265K ffmpeg 8.0
by David Niklas 20 Jan '26

20 Jan '26

Hello, I'm trying to encode a 4K video with ffmpeg. The QSV encoder will not initialize. I've tried searching online, but all I can find is that my syntax might be incorrect. I have tried to read the ffmpeg wiki, but it doesn't explain what to use nor how to use it. The provided examples in the wiki fail with the exact same errors as below. Any ideas? Thanks! % ffprobe tmp.mp4 <snip reason=Duplicate version info."> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'tmp.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf62.3.100 Duration: 00:03:15.79, start: 0.000000, bitrate: 36078 kb/s Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709, progressive), 3840x2160, 35970 kb/s, 30 fps, 30 tbr, 90k tbn (default) Metadata: handler_name : VideoHandle vendor_id : [0][0][0][0] Side data: displaymatrix: rotation of -180.00 degrees % ffmpeg -init_hw_device qsv=hw -filter_hw_device hw -i tmp.mp4 -c:v vp9_qsv -b:v 2M -preset veryslow vp9_qsv.webm ffmpeg version 8.0 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 12 (Debian 12.2.0-14+deb12u1) configuration: --prefix=/usr/local --enable-gpl --enable-version3 --enable-nonfree --enable-gray --enable-doc --enable-alsa --enable-chromaprint --enable-frei0r --enable-gmp --enable-ladspa --enable-lcms2 --enable-libaom --enable-libaribb24 --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libdavs2 --enable-libdvdnav --enable-libdvdread --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libharfbuzz --enable-libglslang --enable-libgme --enable-libgsm --enable-libilbc --enable-libjack --enable-libjxl --enable-libkvazaar --enable-libmodplug --enable-libmp3lame --enable-liboapv --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libqrencode --enable-librabbitmq --enable-librav1e --enable-librist --enable-librsvg --enable-librubberband --enable-librtmp --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libtwolame --enable-libuavs3d --enable-libv4l2 --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libvvenc --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxeve --enable-libxevd --enable-libxavs --enable-libxavs2 --enable-libxvid --enable-libxml2 --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-lzma --enable-libmysofa --enable-openal --enable-opencl --enable-opengl --enable-openssl --enable-pocketsphinx --enable-sndio --enable-sdl2 --enable-vapoursynth --enable-libvpl --enable-v4l2-m2m --disable-stripping --cpu=native --target-os=linux --enable-shared libavutil 60. 8.100 / 60. 8.100 libavcodec 62. 11.100 / 62. 11.100 libavformat 62. 3.100 / 62. 3.100 libavdevice 62. 1.100 / 62. 1.100 libavfilter 11. 4.100 / 11. 4.100 libswscale 9. 1.100 / 9. 1.100 libswresample 6. 1.100 / 6. 1.100 [QSV @ 0x55c48ea44440] No supported child device type is enabled Device creation failed: -38. Failed to set value 'qsv=hw' for option 'init_hw_device': Function not implemented Error parsing global options: Function not implemented

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[ffmpeg-user] vaapi cannot be compiled into ffmpeg 8.0
by David Niklas 20 Jan '26

20 Jan '26

Hello, I'm running Devuan (Debian) Linux. I'm splitting this mail thread from the "Cannot use QSV on Intel 265K ffmpeg 8.0" as this seems to be a different topic. On Tue, 20 Jan 2026 14:07:21 +0000 Peter van den Houten via ffmpeg-user <ffmpeg-user(a)ffmpeg.org> wrote: > 3) I played around with stdbit.h and I'm puzzled as to why your build > is ignoring FFmpeg's compat/stdbit/stdbit.h > > To test, I moved mine away, causing the build to fail, then added a > "--extra-cflags=-I/new_location" and it worked as it should. > So I tried adding the --extra-cflags="-Icompat/" both with and without stdbit/ dir as well as specifying it as an absolute path to no effect. I also tried listing the file itself, again, without effect. Checking the log, the option is being passed to gcc -- which makes this even more weird. % gcc --version gcc (Debian 12.2.0-14+deb12u1) 12.2.0 I then installed stdbit.h into /usr/include/ but I'm still getting the same error. The last lines of config.log read: BEGIN /tmp/ffconf.BwXd0JCb/test.c 1 #include <stdbit.h> 2 #include <assert.h> 3 int main(void) { static_assert(__STDC_VERSION_STDBIT_H__ >= 202311L, "Compiler lacks stdbit.h"); return 0; } END /tmp/ffconf.BwXd0JCb/test.c gcc -D_ISOC11_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -DPIC -O2 -mtune=native -march=native -I=/root/working/ffmpeg-8.0/compat/stdbit/ -march=native -std=c17 -fomit-frame-pointer -fPIC -pthread -I/usr/local/include/oapv -I/usr/include/lilv-0 -I/usr/include/serd-0 -I/usr/include/sord-0 -I/usr/include/sratom-0 -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/harfbuzz -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/fribidi -I/usr/include/libxml2 -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/bs2b -I/usr/local/include -I/usr/include/libdrm -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -DHWY_SHARED_DEFINE -I/usr/local/include -I/usr/lib/x86_64-linux-gnu/pkgconfig/../../../include -I/usr/lib/x86_64-linux-gnu/pkgconfig/../../../include/vpl -DMFX_DEPRECATED_OFF -I/usr/include/openjpeg-2.5 -I/usr/include/x86_64-linux-gnu -I/usr/include/opus -I/usr/include/opus -I/usr/include/rav1e -I/usr/include/librsvg-2.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libpng16 -I/usr/include/x86_64-linux-gnu -I/usr/include/webp -pthread -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/p11-kit-1 -I/usr/include/srt -I/usr/include/svt-av1 -DEB_DLL -I/usr/include/leptonica -I/usr/local/include -I/usr/local/include -I/usr/include/webp -I/usr/include/webp -DX264_API_IMPORTS -I/usr/local/include -I/usr/local/include/xevd -I/usr/local/include/xeve -isystem /usr/include/mit-krb5 -I/usr/include/pgm-5.3 -I/usr/include/libxml2 -I/usr/include/libxml2 -I/usr/include/AL -I/usr/include/sphinxbase -I/usr/include/pocketsphinx -I/usr/include/x86_64-linux-gnu -I/usr/include/x86_64-linux-gnu/sphinxbase -I/usr/include/libdrm -g -Wall -Wdisabled-optimization -Wpointer-arith -Wredundant-decls -Wwrite-strings -Wtype-limits -Wundef -Wmissing-prototypes -Wstrict-prototypes -Wempty-body -Wno-parentheses -Wno-switch -Wno-format-zero-length -Wno-pointer-sign -Wno-unused-const-variable -Wno-bool-operation -Wno-char-subscripts -O3 -fno-math-errno -fno-signed-zeros -fno-tree-vectorize -Werror=format-security -Werror=implicit-function-declaration -Werror=missing-prototypes -Werror=return-type -Werror=vla -Wformat -fdiagnostics-color=auto -Wno-maybe-uninitialized -c -o /tmp/ffconf.BwXd0JCb/test.o /tmp/ffconf.BwXd0JCb/test.c gcc -march=native -Wl,--as-needed -Wl,-z,noexecstack -Wl,-rpath-link=:libswresample:libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil -o /tmp/ffconf.BwXd0JCb/test /tmp/ffconf.BwXd0JCb/test.o ERROR: vaapi requested but not found I ran the above commands but with the file as tmp.c, tmp.o, tmp in the ffmpeg dir and it worked just fine. I'm really at a loss on how to proceed with this one. Like gcc should print an error message which aught to be recorded. I can't find any debug or verbose option for the configure script. Log attached. Any Ideas? Thanks, David

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Is there any way to suppress Stream 2 warning on ffplay Blu-ray iso playback?
by 桃源老師 20 Jan '26

20 Jan '26

I get warning message regarding Stream 2 when starting of playback Blu-ray iso disk image with ffplay. The warning is same with Blu-ray structure folder. I used tsMuxeR to create the Blu-ray iso / folder. The waring message are the following: [mpegts @ 0x8d6ff4780] start time for stream 2 is not set in estimate_timings_from_pts [mpegts @ 0x8d6ff4780] stream 2 : no TS found at start of file, duration not set [mpegts @ 0x8d6ff4780] Could not find codec parameters for stream 2 (Audio: ac3, 0 channels): unspecified sample format Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options The ffplay command and console output are the following: $ ffplay -i bluray:SBA/ ffplay version N-122259-gfe1dae1e18 Copyright (c) 2003-2025 the FFmpeg developers built with Apple clang version 17.0.0 (clang-1700.6.3.2) configuration: --prefix=/Volumes/ffmpeg_compile --pkg-config-flags=--static --enable-gpl --enable-version3 --enable-nonfree --enable-libmp3lame --enable-libfdk-aac --enable-libvo-amrwbenc --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvorbis --enable-libspeex --enable-libopus --enable-libgsm --enable-libtwolame --enable-libsoxr --enable-libmodplug --enable-libopenjpeg --enable-libwebp --enable-libtheora --enable-libx264 --enable-libopenh264 --enable-libx265 --enable-libxvid --enable-libvpx --enable-libxavs --enable-libfreetype --enable-libharfbuzz --enable-fontconfig --enable-libfribidi --enable-libass --enable-libbluray --enable-libvidstab --enable-libsnappy --enable-libzmq --enable-libzvbi --enable-libzimg --enable-libaom --enable-libdav1d --enable-libmysofa --enable-librubberband --enable-libshine --enable-libvmaf --enable-libsvtav1 --enable-libxml2 --enable-libplacebo --enable-vulkan --enable-libshaderc --enable-lcms2 --enable-whisper --enable-lzma libavutil 60. 20.100 / 60. 20.100 libavcodec 62. 23.102 / 62. 23.102 libavformat 62. 8.101 / 62. 8.101 libavdevice 62. 2.100 / 62. 2.100 libavfilter 11. 10.101 / 11. 10.101 libswscale 9. 3.100 / 9. 3.100 libswresample 6. 2.100 / 6. 2.100 [bluray @ 0x8d71c4460] 1 usable playlists: [bluray @ 0x8d71c4460] playlist 00000.mpls (2:20:17) [bluray @ 0x8d71c4460] selected 00000.mpls [mpegts @ 0x8d6ff4780] start time for stream 2 is not set in estimate_timings_from_pts [mpegts @ 0x8d6ff4780] stream 2 : no TS found at start of file, duration not set bluray.c:300: 00000.m2ts: no timestamp for SPN 0 (got 0). clip 27003003-405810432. [mpegts @ 0x8d6ff4780] Could not find codec parameters for stream 2 (Audio: ac3, 0 channels): unspecified sample format Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options Input #0, mpegts, from 'bluray:SBA/': Duration: 02:20:17.94, start: 600.066733, bitrate: 14750 kb/s Program 1 Stream #0:0[0x1011]: Video: mpeg2video (Main) (HDMV / 0x564D4448), yuv420p(tv, bt709, top first), 1440x1080 [SAR 4:3 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, start 600.066733 Side data: CPB properties: bitrate max/min/avg: 24000000/0/0 buffer size: 9781248 vbv_delay: N/A Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s, start 600.093000 No Program Stream #0:2[0x1fff]: Audio: ac3, 0 channels, start 600.066733 676.31 A-V: -0.001 fd= 9 aq= 32KB vq= 1555KB sq= 0B My source mpeg2ts (m2ts) file dose not have Stream 2, and I suspect it was added by tsMuxeR, for the purpose of Blu-ray compatibility. I do not have enough knowledge with MPEG transport stream, but Stream 2's PID 0x1fff seams to mean null packet... https://en.wikipedia.org/wiki/MPEG_transport_stream So my question/request is there any way to suppress the warning regarding Stream 2, if my suspect is correct? Best Regards, Tougen-roushi

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nlmeans, ffmpeg version with rply
by Richard Bartczak 20 Jan '26

20 Jan '26

I search forth the respective ffmpeg version with a reply of nlmeams. Regards Rchard Bartczak

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failed to build ffmpeg with libplacebo, vulkan etc
by Henrik SEKUJ 18 Jan '26

18 Jan '26

Hello, I am trying to build ffmpeg latest from git with various hardware accelerator libraries as I have an nvidia 1660 super. The system is debian 12.9 with custom build kernel 6.6.120, nvidia drivers & modules, cuda 13.1, vulkan sdk 1.4.335.0, liblacebo morew than 7.351 and a lot of libraries. I disabled libnpp support because I gave me errors during compile, and then I read somewhere that cuda 13 changed name of some functions and there is no its fix of ffmpeg at this moment My configure is: ./configure --enable-nonfree --enable-cuda-nvcc --disable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64 --incdir=/usr/include/x86_64-linux-gnu --libdir=/usr/lib/x86_64-linux-gnu --disable-static --enable-shared --enable-cuvid --enable-decoder=aac --enable-decoder=h264 --enable-decoder=h264_cuvid --enable-demuxer=mov --enable-filter=scale --enable-gnutls --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-nvdec --enable-nvenc --enable-pic --enable-protocol=file --enable-protocol=https --enable-vaapi --enable-libplacebo --enable-vulkan --enable-libshaderc --enable-ladspa --enable-libaom --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfribidi --enable-libzimg --enable-libgme --enable-libgsm --enable-libjack --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtwolame --enable-libvidstab --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-frei0r --prefix=/usr/local/ffmpeg. At linkage last steps I have: /usr/bin/ld: fftools/ffplay_renderer.o: in function `add_device_extension': /home/iriu/c++/ffmpeg/ffmpeg/fftools/ffplay_renderer.c:172: undefined reference to `pl_vulkan_num_recommended_extensions' /usr/bin/ld: /home/iriu/c++/ffmpeg/ffmpeg/fftools/ffplay_renderer.c:172: undefined reference to `pl_vulkan_recommended_extensions' collect2: error: ld returned 1 exit status make: *** [Makefile:150: ffplay_g] Error 1 I searched for these symbols, they are defined in libplacebo, but as external.how can I solve this ? please helpthanks in advance

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Debugging RTP streaming with IPv6 link-local multicast
by arf20 15 Jan '26

15 Jan '26

Hi, I am trying to stream RTP over IPv6 link-local multicast, but despite everything I am doing I cannot get ffmpeg to receive it. I write here because I've ran out of options. To transmit the stream I use the following, with the interface in the local address: ffmpeg -f alsa -channels 1 -sample_rate 8000 -i default -c:a pcm_mulaw -f rtp "rtp://[ff12::acab:cafe:beef:caca]:10000?localaddr=fe80::d65d:64ff:fe81:7095%enp4s0" And to receive it, I had to patch libavformat/udp.c to join the multicast group in the correct interface provided by addr.sin6_scope_id (PR#21439). The following was used, with the interface specified in the rtp address: ffplay -protocol_whitelist file,udp,rtp rtp://[ff12::acab:cafe:beef:caca%enp4s0]:10000 I could confirm packets were being emitted in the enp4s0 interface with the correct destination. And I could see ffplay bind() to the right address and joined the right multicast group as confirmed by ss and ip: # ss -6a udp UNCONN 0 0 [ff12::acab:cafe:beef:caca]%enp4s0:10000 [::]:* udp UNCONN 0 0 [ff12::acab:cafe:beef:caca]%enp4s0:10001 [::]:* # ip -6 maddress 2: enp4s0 inet6 ff12::acab:cafe:beef:caca users 2 I was also able to receive the RTP packets if I replicated this bind() and join behaviour in a minimal C example program: $ ./ipv6_multicast_recv ff12::acab:cafe:beef:caca%enp4s0 10000 �{��g��%{vtup��~��|��g��%��|z{|zz||xyvrrsponmnmlnnnpostuvyy{�~{��~��~��}|~}z{zy|yy{y{|{{�}��hE�%��}��~~~}|xwxwtpoooqomlklljjjikjjkklmmmnmorpnqqrtuy|z|�}��~}zzzxwwwrrpnnppprsqpppqprpopo�~��hy�%pqprpprtvwxxy|}|~ [...] But whatever I did, I could not get ffplay (or ffmpeg) to receive the multicast packets. I have tried -loglevel trace but nothing of use appears. I have confirmed that global multicast works, with routable addresses, such as this (note the ff1e:: scope prefix): ffmpeg -f alsa -channels 1 -sample_rate 8000 -i default -c:a pcm_mulaw -f rtp "rtp://[ff1e::acab:cafe:beef:caca]:10000?localaddr=fd7c:3f3e:c7e2::1" ffplay -protocol_whitelist file,udp,rtp rtp://[ff1e::acab:cafe:beef:caca]:10000 So clearly IPv6 multicast works. The problem is somewhere in the handling of link-local multicast group addresses. But I am not familiar enough with the libav source to debug this, I have ran out of options here. Also for some reason I cannot observe any bind() call in ffplay with strace, strange. Thank you for reading, any help appreciated! Angel

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LGPL3 build trying to include lib
by Andy Eastham 15 Jan '26

15 Jan '26

Hi, I am using the media autobuild suite on windows 11 pro for the first time, trying to build LGPL3 libraries for windows, hoping to use openx264. I'm getting the error libfdk_aac is incompatible with the gpl and --enable-nonfree is not specified. I do not need this library and I'm not sure what's causing it to be included? The ini file is pasted below. Any help would be greatly appreciated. Thanks ffmpeg git ......................................... [Recently updated] + Changing options to comply to lgplv3... + Compiling shared FFmpeg... + Running configure... Likely error (tail of the failed operation logfile): CXXFLAGS: -D_FORTIFY_SOURCE=2 -fstack-protector-strong -mtune=generic -O2 -pipe -D__USE_MINGW_ANSI_STDIO=1 LDFLAGS: -D_FORTIFY_SOURCE=2 -fstack-protector-strong -mtune=generic -O2 -pipe -D__USE_MINGW_ANSI_STDIO=1 -static-libgcc -static-libstdc++ -L/local64/lib -L/mingw64/lib ../configure --prefix=/local64 --disable-static --enable-shared --pkg-config=pkgconf --pkg-config-flags=--keep-system-libs --keep-system-cflags --static --cc=ccache gcc --cxx=ccache g++ --ld=ccache g++ --extra-cxxflags=-fpermissive --extra-cflags=-Wno-int-conversion --disable-autodetect --enable-amf --enable-bzlib --enable-cuda --enable-cuvid --enable-d3d12va --enable-d3d11va --enable-dxva2 --enable-iconv --enable-lzma --enable-nvenc --enable-schannel --enable-zlib --enable-sdl2 --enable-ffnvcodec --enable-nvdec --enable-cuda-llvm --enable-gmp --enable-gpl --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libdav1d --enable-libaom --disable-debug --enable-libfdk-aac --extra-libs=-liconv --enable-version3 --prefix=/local64 --bindir=/local64/bin-video --shlibdir=/local64/bin-video libfdk_aac is incompatible with the gpl and --enable-nonfree is not specified. If you think configure made a mistake, make sure you are using the latest version from Git. If the latest version fails, report the problem to the ffmpeg-user(a)ffmpeg.org mailing list or IRC #ffmpeg on irc.libera.chat. Include the log file "ffbuild/config.log" produced by configure as this will help solve the problem. configure failed. Check C:/media-autobuild_suite-master/build/ffmpeg-git/build-shared-64bit/ab-suite .configure.log This is required for other packages, so this script will exit. Creating diagnostics file... My ini file is as follows. Is one of these options causing the problem or something else? Thanks [compiler list] arch=3 license2=4 standalone=1 av1an=2 vpx2=2 aom=2 rav1e=2 dav1d=2 libavif=2 libheif=2 jpegxl=2 x2643=5 x2652=5 other265=2 svthevc=2 xvc=2 vvc=2 uvg266=1 vvenc=2 vvdec=2 svtav1=2 svtvp9=2 flac=2 fdkaac=2 faac=2 exhale=2 mediainfo=2 soxB=2 ffmpegB2=5 ffmpegPath=https://git.ffmpeg.org/ffmpeg.git ffmpegUpdate=1 ffmpegChoice=2 mp4box=2 rtmpdump=2 mplayer2=2 mpv=2 vlc=2 bmx=2 curl=2 ffmbc=2 cyanrip2=2 ripgrep=2 jq=2 jo=2 dssim=2 gifski=3 avs2=2 dovitool=2 hdr10plustool=2 zlib=6 CC=2 cores=12 deleteSource=1 strip=1 pack=2 logging=1 updateSuite=1 timeStamp=2 ccache=1 noMintty=2 pkgUpdateTime=86400 ffmpegKeepLegacyOpts=0

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ISSUE ABOUT LOG REDIRECTION
by Hervé ANSELME 09 Jan '26

09 Jan '26

Hello all, first, in this beginning of year : my best wishes to all of you. I am using ffmpeg, both release 6.1, running on Windows 11 Family. In order to log what happens, I used to add at the end of the ffmpeg command line : 1>"file.log1" 2>"file.log2" So that the full command line looks like : ffmpeg -i "source file" <parameters> "destination file" 1>"file.log1" 2>"file.log2" In some cases (for some source files) it works fine ; and for another source files, I don't know why, the command execution produces the following error : [AVFormatContext @ 00000247c4bbd100] Unable to choose an output format for '1>file.log1'; use a standard extension for the filename or specify the format manually. [out#1 @ 00000247c46ceb00] Error initializing the muxer for 1>file.log1: Invalid argument Error opening output file 1>file.log1. Error opening output files: Invalid argument Does anyone has any idea for what causes this error ? Thank you in advance for your replies and advices. Regards, HA

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