November 2023 - ffmpeg-user - lists.ffmpeg.org

Silence remove at start and end of audio file
by kevin draper 30 Nov '23

30 Nov '23

Hi, I'm currently using areverse,silenceremove=start_periods=1... areverse,silenceremove=start_periods=1... I'd like to take out the areverse and use silenceremove=stop_periods to trim the end of recordings, but it doesn't work as expected. stop_periods=1 cuts the audio at the first pause in speech. stop_periods=<big number> doesn't trim at the end of the recording at all. Can you point me to any examples of using start_periods...stop_periods=<positive> on the same line? The examples in the doc are all based on stop_periods=<negative>. Thanks -- Kevin Draper *Mobile +44 (0)7904 207537* Email Kevin Draper <kdkevindraper(a)gmail.com>

1 0

drawtext filter missing
by Leo Butler 29 Nov '23

29 Nov '23

Hello, I ran into this problem with the current Debian testing build, so I thought I would try the static build. Both are compiled with --enable-libfreetype but both barf on a drawtext filter. I am attaching the log file from the static build. According to: https://ffmpeg.org/ffmpeg-all.html#drawtext-1 the libfreetype library should be sufficient. See also: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1056597 https://trac.ffmpeg.org/ticket/10705#ticket Leo

6 11

does ffmpeg support MVC (3D BluRays)?
by Philippe Cerfon 29 Nov '23

29 Nov '23

Hey there. I couldn't find a definitive answer on this. Some Wikipedia articles and stackoverflow questions claim ffmpeg would not support playback of MVC (and thus 3D BluRays). I don't have a 3D projector or anything the likes yet, but still wanted to check whether some Videos would actually contain 3D information. So basically I though via ffmpeg's stereo3d filter (https://trac.ffmpeg.org/wiki/Stereoscopic) I might be able to get the 3D BluRay into a side-by-side picture, which should then be similar but of course a bit different. However, when doing so the results are not really as I'd expect them: Each side is only roughly half of the full picture. And the same happens also when I do it on a BluRay that for sure has no 3D. I further saw that there are probably some OpenSource MVC decoders: https://github.com/carrardt/h264-tools https://github.com/Britz/FFmpeg (was a master thesis with H.264 MVC support for ffmpeg) So should that work already, or could I open a feature request somewhere? :-) Thanks, Philippe

2 3

More Liberal Licensing
by Suminda Sirinath Salpitikorala Dharmasena 28 Nov '23

28 Nov '23

Hello, Is there a possibility to gradually move away from *GPL to a more liberal license? E.g. Apache 2.0 and/or MIT and/or BSD. Suminda

7 18

Compiling FFmpeg for nvidia hardware encoding on Debian 12
by Lowell Friesen 27 Nov '23

27 Nov '23

Hi there, I’m trying to compile FFmpeg on Debian 12 to enable hardware encoding with an Nvidia graphics card, but am having some issues. I have installed the nvidia driver and cuda toolkit. This is the output of |nvidia-smi|: |+-----------------------------------------------------------------------------+ | NVIDIA-SMI 525.125.06 Driver Version: 525.125.06 CUDA Version: 12.0 | |-------------------------------+----------------------+----------------------+ | GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC | | Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. | | | | MIG M. | |===============================+======================+======================| | 0 NVIDIA GeForce ... On | 00000000:01:00.0 On | N/A | | 0% 45C P2 46W / 163W | 1052MiB / 4096MiB | 2% Default | | | | N/A | +-------------------------------+----------------------+----------------------+ +-----------------------------------------------------------------------------+ | Processes: | | GPU GI CI PID Type Process name GPU Memory | | ID ID Usage | |=============================================================================| | 0 N/A N/A 1697 G /usr/lib/xorg/Xorg 275MiB | | 0 N/A N/A 1862 G /usr/bin/gnome-shell 55MiB | | 0 N/A N/A 2086 G ...ud-3.10.1-x86_64.AppImage 2MiB | | 0 N/A N/A 3096 G /usr/lib/firefox/firefox 448MiB | | 0 N/A N/A 3905 G ...b/thunderbird/thunderbird 183MiB | | 0 N/A N/A 5558 G /usr/bin/nautilus 41MiB | | 0 N/A N/A 6235 G ...936111296816443610,262144 12MiB | | 0 N/A N/A 117598 G ...RendererForSitePerProcess 15MiB | +-----------------------------------------------------------------------------+ | Consulting the FFmpeg’s compilation guide <https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu> I am given a list of dependencies to install. Two of them (|libsdl2-dev| and |libvdpau-dev|) give me the following error when I attempt to install them: |The following packages have unmet dependencies: libx11-dev : Depends: libx11-6 (= 2:1.8.4-2+deb12u1) but 2:1.8.7-1 is to be installed | I would install the older version of |libx11-dev| except that |sudo apt install libx11-6=2:1.8.4-2+deb12u1| gives me such a long list of packages that will be removed that I have the strong suspicion I would be left with an unusable system if I went ahead with it. |Reading package lists... Done Building dependency tree... Done Reading state information... Done The following packages were automatically installed and are no longer required: apg avahi-utils bogofilter bogofilter-bdb bogofilter-common brasero-common ca-certificates-java cdrdao cheese-common chromium-sandbox coinor-libcbc3 coinor-libcgl1 coinor-libclp1 coinor-libcoinmp1v5 coinor-libcoinutils3v5 coinor-libosi1v5 default-jre-headless docbook-xml espeak-ng-data evolution-common evolution-data-server-common firebird3.0-common firebird3.0-common-doc firebird3.0-server-core firebird3.0-utils folks-common fonts-dejavu fonts-dejavu-extra fonts-font-awesome gimp-data gir1.2-accountsservice-1.0 gir1.2-atspi-2.0 gir1.2-evince-3.0 gir1.2-gck-1 gir1.2-gcr-3 gir1.2-gdm-1.0 gir1.2-geocodeglib-2.0 gir1.2-gmenu-3.0 gir1.2-gnomebluetooth-3.0 gir1.2-gnomedesktop-3.0 gir1.2-grilo-0.3 gir1.2-gstreamer-1.0 gir1.2-gtksource-4 gir1.2-ibus-1.0 gir1.2-javascriptcoregtk-4.0 gir1.2-javascriptcoregtk-4.1 gir1.2-json-1.0 gir1.2-malcontent-0 gir1.2-mediaart-2.0 gir1.2-nm-1.0 gir1.2-nma-1.0 gir1.2-polkit-1.0 gir1.2-rest-1.0 gir1.2-rsvg-2.0 gir1.2-shumate-1.0 gir1.2-soup-2.4 gir1.2-soup-3.0 gir1.2-totem-1.0 gir1.2-totemplparser-1.0 gir1.2-tracker-3.0 gir1.2-upowerglib-1.0 gnome-control-center-data gnome-session-common gnome-settings-daemon-common gnome-shell-common graphviz grilo-plugins-0.3 gsfonts gstreamer1.0-x i965-va-driver ibus ibus-data ibus-gtk ibus-gtk3 ibus-gtk4 ibverbs-providers im-config imagemagick-6-common intel-media-va-driver java-common libaa1 libabw-0.1-1 libamd2 libann0 libasyncns0 libavc1394-0 libbabl-0.1-0 libblas3 libbotan-2-19 libbox2d2 libbrasero-media3-1 libbrlapi0.8 libbs2b0 libburn4 libcaca0 libcamd2 libcamel-1.2-64 libccolamd2 libcdr-0.1-1 libcdt5 libcgraph6 libcholmod3 libcjson1 libclutter-1.0-common libcmark0.30.2 libcodec2-1.0 libcogl-common libcolamd2 libcolord-gtk4-1 libdbus-glib-1-2 libdc1394-25 libdca0 libdecor-0-0 libdecor-0-plugin-1-cairo libdee-1.0-4 libdmapsharing-3.0-2 libdotconf0 libdouble-conversion3 libdrm-amdgpu1 libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libdv4 libdvdnav4 libe-book-0.1-1 libebackend-1.2-11 libebook-1.2-21 libebook-contacts-1.2-4 libecal-2.0-2 libedata-book-1.2-27 libedata-cal-2.0-2 libedataserver-1.2-27 libel-api-java libenca0 libepubgen-0.1-1 libetonyek-0.1-1 libevdev2 libfaad2 libfbclient2 libfftw3-double3 libflatpak0 libflite1 libfolks26 libfreeaptx0 libfreehand-0.1-1 libgail-3-0 libgail-common libgail18 libgbm1 libgdm1 libgegl-common libgfortran5 libgl1-mesa-dri libglapi-mesa libgles-nvidia1 libgles-nvidia2 libgles1 libgles2 libglu1-mesa libglvnd0 libgme0 libgnome-autoar-gtk-0-0 libgnome-bluetooth-ui-3.0-13 libgnome-menu-3-0 libgnome-rr-4-2 libgom-1.0-0 libgpod-common libgpod4 libgrilo-0.3-0 libgsl27 libgslcblas0 libgsm1 libgssdp-1.6-0 libgtk2.0-0 libgtk2.0-bin libgtk2.0-common libgtksourceview-4-0 libgtksourceview-4-common libgts-0.7-5 libgts-bin libgupnp-1.6-0 libgupnp-av-1.0-3 libgupnp-dlna-2.0-4 libgupnp-igd-1.0-4 libgvc6 libgvpr2 libhsqldb1.8.0-java libhwy1 libib-util libibumad3 libibus-1.0-5 libibverbs1 libiec61883-0 libigdgmm12 libimath-3-1-29 libinput-bin libinput10 libinstpatch-1.0-2 libisofs6 libjack-jackd2-0 libjavascriptcoregtk-4.1-0 libjavascriptcoregtk-6.0-1 libjsp-api-java libjte2 libjxl0.7 libjxr-tools libjxr0 libkate1 liblab-gamut1 liblapack3 liblc3-0 libldacbt-abr2 libldacbt-enc2 liblibreoffice-java liblilv-0-0 liblirc-client0 libllvm15 liblqr-1-0 liblrdf0 libltc11 libmad0 libmagickcore-6.q16-6 libmagickcore-6.q16-6-extra libmagickwand-6.q16-6 libmalcontent-ui-1-1 libmanette-0.2-0 libmbedcrypto7 libmd4c0 libmediaart-2.0-0 libmetis5 libmfx1 libminizip1 libmjpegutils-2.1-0 libmng1 libmodplug1 libmpcdec6 libmpeg2encpp-2.1-0 libmpg123-0 libmplex2-2.1-0 libmspub-0.1-1 libmtdev1 libmwaw-0.3-3 libmypaint-1.5-1 libmypaint-common libmysofa1 libneon27 libnice10 libnma-gtk4-0 libnorm1 libnss-myhostname libnvidia-allocator1 libnvidia-egl-gbm1 libnvidia-egl-wayland1 libnvidia-eglcore libnvidia-encode1 libnvidia-glcore libnvidia-glvkspirv libnvidia-rtcore liboauth0 libodfgen-0.1-1 libopenal-data libopenal1 libopenexr-3-1-30 libopengl0 libopenh264-7 libopenmpt0 libopenni2-0 libostree-1-1 libotr5 libpagemaker-0.0-0 libpathplan4 libperl4-corelibs-perl libpfm4 libpgm-5.3-0 libphonenumber8 libplacebo208 libportal-gtk3-1 libprotobuf32 libpst4 libqt5concurrent5 libqt5core5a libqt5dbus5 libqt5network5 libqt5qml5 libqt5qmlmodels5 libqt5xml5 libqxp-0.0-0 librabbitmq4 libraw1394-11 libraw20 librdmacm1 libreoffice-base-core libreoffice-base-drivers libreoffice-java-common libreoffice-sdbc-firebird librest-1.0-0 librhythmbox-core10 librist4 librnp0 librubberband2 librygel-core-2.8-0 librygel-db-2.8-0 librygel-renderer-2.8-0 librygel-renderer-gst-2.8-0 librygel-server-2.8-0 libsbc1 libserd-0-0 libservlet-api-java libservlet3.1-java libset-scalar-perl libsgutils2-1.46-2 libshine3 libshout3 libshumate-1.0-1 libshumate-common libsnapd-glib-2-1 libsnappy1v5 libsndfile1 libsndio7.0 libsodium23 libsonic0 libsord-0-0 libsoundtouch1 libsoup-gnome2.4-1 libsoxr0 libspa-0.2-bluetooth libspandsp2 libspeechd2 libsratom-0-0 libsrt1.5-gnutls libsrtp2-1 libssh-4 libssh-gcrypt-4 libstaroffice-0.0-0 libsuitesparseconfig5 libtag1v5 libtag1v5-vanilla libtommath1 libtotem0 libtspi1 libtss2-tctildr0 libtwolame0 libu2f-udev libucx0 libumfpack5 libunity-protocol-private0 libunity-scopes-json-def-desktop libunity9 libunoloader-java libv4l-0 libv4lconvert0 libva-drm2 libva-wayland2 libva2 libvdpau1 libvidstab1.1 libvisio-0.1-1 libvo-aacenc0 libvo-amrwbenc0 libvorbisidec1 libvpx8 libvulkan1 libwacom-common libwacom9 libwavpack1 libwayland-bin libwayland-dev libwayland-server0 libwebsocket-api-java libwildmidi2 libwinpr2-2 libwireplumber-0.4-0 libwmf-0.2-7 libwmflite-0.2-7 libwnck-3-common libwpd-0.10-10 libwpe-1.0-1 libwpebackend-fdo-1.0-1 libwpg-0.3-3 libwps-0.4-4 libxatracker2 libxcb-damage0 libxcb-dri2-0 libxcb-dri3-0 libxcb-glx0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-present0 libxcb-randr0 libxcb-render-util0 libxcb-res0 libxcb-sync1 libxcb-util1 libxcb-xinerama0 libxcb-xinput0 libxcb-xkb1 libxcb-xv0 libxcvt0 libxfont2 libxkbcommon-x11-0 libxres1 libxshmfence1 libxss1 libxv1 libxvidcore4 libxvmc1 libxxf86dga1 libytnef0 libz3-4 libzbar0 libzimg2 libzmf-0.0-0 libzmq5 libzvbi-common libzvbi0 libzxcvbn0 libzxing2 lp-solve malcontent malcontent-gui media-player-info mutter-common nsight-compute-target nsight-systems-target nvidia-driver-bin nvidia-egl-common nvidia-settings nvidia-vdpau-driver nvidia-vulkan-common openjdk-17-jre-headless openjdk-8-jre-headless pocketsphinx-en-us power-profiles-daemon python3-brlapi python3-gi-cairo python3-ibus-1.0 python3-louis python3-mako python3-markupsafe python3-pyatspi python3-speechd python3-xdg qttranslations5-l10n realmd rhythmbox-data rtkit sgml-data shotwell-common sound-icons switcheroo-control system-config-printer timgm6mb-soundfont totem-common ure-java x11-session-utils xbitmaps xbrlapi xcvt xdg-dbus-proxy xfonts-100dpi xfonts-75dpi xfonts-base xfonts-scalable xinit xkbset xserver-common xserver-xorg-legacy yelp-xsl zenity-common Use 'sudo apt autoremove' to remove them. The following additional packages will be installed: libreoffice-core-nogui openjdk-8-jre-headless policykit-1-gnome Suggested packages: fonts-nanum fonts-ipafont-gothic fonts-ipafont-mincho fonts-wqy-microhei fonts-wqy-zenhei fonts-indic The following packages will be REMOVED: cheese chrome-gnome-shell chromium chromium-common default-jre evolution evolution-data-server evolution-plugin-bogofilter evolution-plugin-pstimport evolution-plugins firefox gdm3 gimp gir1.2-clutter-1.0 gir1.2-cogl-1.0 gir1.2-coglpango-1.0 gir1.2-gst-plugins-bad-1.0 gir1.2-gst-plugins-base-1.0 gir1.2-gtkclutter-1.0 gir1.2-mutter-11 gir1.2-rb-3.0 gir1.2-webkit2-4.0 gir1.2-webkit2-4.1 gir1.2-wnck-3.0 gnome gnome-2048 gnome-browser-connector gnome-calendar gnome-contacts gnome-control-center gnome-core gnome-games gnome-initial-setup gnome-maps gnome-music gnome-nibbles gnome-online-accounts gnome-remote-desktop gnome-session gnome-session-bin gnome-settings-daemon gnome-shell gnome-shell-extension-prefs gnome-shell-extensions gnome-sound-recorder gnome-sushi gnome-tweaks gnome-user-docs gnome-video-effects gstreamer1.0-clutter-3.0 gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-libav gstreamer1.0-pipewire gstreamer1.0-plugins-bad gstreamer1.0-plugins-good keepassx keepassxc libatk-wrapper-java libatk-wrapper-java-jni libavcodec59 libavfilter8 libavformat59 libavutil57 libcanberra-pulse libcheese-gtk25 libcheese8 libchromaprint1 libclutter-1.0-0 libclutter-gst-3.0-0 libclutter-gtk-1.0-0 libcogl-pango20 libcogl-path20 libcogl20 libdirectfb-1.7-7 libedataserverui-1.2-4 libedataserverui4-1.0-0 libegl-mesa0 libegl-nvidia0 libegl1 libespeak-ng1 libevolution libfluidsynth3 libfolks-eds26 libfreerdp-server2-2 libfreerdp2-2 libgegl-0.4-0 libges-1.0-0 libgimp2.0 libgl1 libgl1-nvidia-glvnd-glx libglx-mesa0 libglx-nvidia0 libglx0 libgoa-backend-1.0-1 libgstreamer-gl1.0-0 libgstreamer-plugins-bad1.0-0 libmutter-11-0 libpcaudio0 libpipewire-0.3-modules libpocketsphinx3 libpostproc56 libpulse-mainloop-glib0 libpulse0 libqt5gui5 libqt5quick5 libqt5svg5 libqt5waylandclient5 libqt5waylandcompositor5 libqt5widgets5 libqt5x11extras5 libreoffice-base libreoffice-calc libreoffice-core libreoffice-draw libreoffice-gnome libreoffice-gtk3 libreoffice-impress libreoffice-math libreoffice-sdbc-hsqldb libreoffice-writer libsdl1.2debian libsdl2-2.0-0 libsphinxbase3 libstartup-notification0 libswresample4 libswscale6 libva-dev libva-glx2 libva-x11-2 libvdpau-va-gl1 libwebkit2gtk-4.0-37 libwebkit2gtk-4.1-0 libwebkitgtk-6.0-4 libwnck-3-0 libx11-xcb1 libyelp0 mesa-va-drivers mesa-vdpau-drivers mesa-vulkan-drivers mplayer nsight-compute nsight-systems nvidia-driver nvidia-driver-libs nvidia-egl-icd nvidia-openjdk-8-jre nvidia-visual-profiler nvidia-vulkan-icd openjdk-17-jre orca pipewire pipewire-alsa pipewire-audio pipewire-bin pipewire-pulse qt5-gtk-platformtheme qtwayland5 quadrapassel rhythmbox rhythmbox-plugin-cdrecorder rhythmbox-plugins rygel rygel-playbin rygel-tracker shotwell smplayer smplayer-l10n smplayer-themes speech-dispatcher speech-dispatcher-audio-plugins speech-dispatcher-espeak-ng swell-foop task-desktop task-gnome-desktop thunderbird totem totem-plugins va-driver-all vdpau-driver-all wireplumber x11-apps x11-utils xorg xserver-xephyr xserver-xorg xserver-xorg-core xserver-xorg-input-all xserver-xorg-input-libinput xserver-xorg-input-wacom xserver-xorg-video-all xserver-xorg-video-amdgpu xserver-xorg-video-ati xserver-xorg-video-fbdev xserver-xorg-video-intel xserver-xorg-video-nouveau xserver-xorg-video-nvidia xserver-xorg-video-qxl xserver-xorg-video-radeon xserver-xorg-video-vesa xserver-xorg-video-vmware xwayland yelp zenity The following NEW packages will be installed: libreoffice-core-nogui openjdk-8-jre-headless policykit-1-gnome The following packages will be DOWNGRADED: libx11-6 0 upgraded, 3 newly installed, 1 downgraded, 204 to remove and 0 not upgraded. Need to get 57.9 MB of archives. After this operation, 2,512 MB disk space will be freed. Do you want to continue? [Y/n] | What should I do? Thanks for helping me with this.

3 2

VBR encoding for libsvtav1.
by Aditya Dandavate 27 Nov '23

27 Nov '23

I was trying and searching the web to 'how to encode videos with libsvtav1 with help of VBR rate control mode and I found on this page that setting -rc 1 will enable Variable Bitrate mode. https://gitlab.com/AOMediaCodec/SVT-AV1/-/blob/master/Docs/svt-av1_encoder_… I tried to set '-rc 1' but the it says : `[out#0/nut @ 00000208aba3eac0] Codec AVOption rc (Override the preset rate-control) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.` So, how to encode videos with Variable Bitrate rate control mode with libsvtav1 encoder ? I need help from you guys about this.

3 10

Need to reduce size of ffmpeg.exe
by Kumar, Rahul 21 Nov '23

21 Nov '23

Hi All, I am trying to reduce the size of ffmpeg.exe for using it to convert RTSP streams to HLS. I used the below command to configure : ./configure --prefix=ffmpeg_64/ --enable-shared --disable-everything --enable-protocol=rtsp --enable-protocol=http --enable-demuxer=rtsp --enable-muxer=hls --enable-muxer=segment --enable-muxer=mpegts --enable-encoder=mpeg2video --enable-encoder=aac --enable-decoder=h264 --enable-decoder=aac --enable-parser=h264 --enable-parser=aac --enable-filter=copy --enable-filter=aformat --enable-filter=aresample --enable-bsf=h264_mp4toannexb --enable-bsf=aac_adtstoasc --enable-gpl --enable-version3 --enable-nonfree --enable-small --yasmexe='C:/c99/yasm-1.3.0-win64.exe' --target-os=win64 --arch=x86_64 --toolchain=msvc After this I ran "make" and "make install" command which created 1.2 mb ffmpeg.exe in bin folder. This ffmpeg.exe is not working for me. Can somebody guide me if I am missing anything here? Regards, Rahul Honeywell

3 3

splitting up video with high quality (HDR, 4k, Dolby Atmos+ TrueHd)
by Sebbi Thueni 21 Nov '23

21 Nov '23

Hi I have a question regarding a command in ffmpeg. I have a relatively high quality video as test.mkv which has a 4k quality and hdr. additionally it has a truehd dolby atmos audio. so lossless and uncompressed. i'm trying to cut the video into small snippets of 5 s now. the background is that i can play this video better as video on demand as m3u8. if i use this : ffmpeg -i test.mkv -f segment -segment_time 5 test%d.mkv the desired result does not come out. ffmpeg turns the audio into sound in vorbis. which no longer offers the quality of a pure atmos truehd sound. but if i just copy the sound and the video with: ffmpeg -i test.mkv -c:v copy -c:a copy -f segment -segment_time 5 test%d.mkv or ffmpeg -i test.mkv -c:v copy -c:a truehd -f segment -segment_time 5 test%d.mkv or ffmpeg -i test.mkv -map 0:v -c:v copy -map 0:a -c:a copy -f segment -segment_time 5 test%d.mkv ffmpeg -i test.mkv -map 0:v -c:v copy -map 0:a -c:a truehd -f segment -segment_time 5 test%d.mkv the sound is not played in all segments. The video is always flawless. My question now is if someone can help me to get these segments to work. because theoretically it is just a copy of everything and always cut off after a few seconds.

3 2

does swscale support rgbf32 conversions?
by Andrew Randrianasulu 21 Nov '23

21 Nov '23

I am trying to add fp32 tiff reading via ffmpeg for cinelerra-gg. we have this routine: convert_ctx = sws_getCachedContext(convert_ctx, ip->width, ip->height, pix_fmt, frame->get_w(), frame->get_h(), ofmt, SWS_POINT, NULL, NULL, NULL); if( !convert_ctx ) { fprintf(stderr, "FFVideoConvert::convert_picture_frame:" " sws_getCachedContext() failed\n"); fprintf(stderr, "pix_fmt %s \n", av_get_pix_fmt_name(pix_fmt)); fprintf(stderr, "output format %s \n", av_get_pix_fmt_name(ofmt)); return -1; } so for rgbaf32 tiff it prints: FFMPEG::open_decoder: some stream have bad times: /data/data/com.termux/files/home/test_color.tif FFMPEG::open_decoder: some stream have bad times: /data/data/com.termux/files/home/test_color.tif FFVideoConvert::convert_picture_frame: sws_getCachedContext() failed pix_fmt rgbf32le output format rgbaf32le FFVideoConvert::convert_picture_frame: sws_getCachedContext() failed pix_fmt rgbf32le output format rgbf32le for rgba-float pipeline, or FFVideoConvert::convert_picture_frame: sws_getCachedContext() failed pix_fmt rgbf32le output format rgba for rgba-8 pipeline. tiff images from https://github.com/imageio/imageio/files/7697625/TestImages_float32_Photosh… our ffmpeg.C http://git.cinelerra-gg.org/git/?p=goodguy/cinelerra.git;a=blob;f=cinelerra… I just added mappings to case BC_RGBA_FLOAT: return AV_PIX_FMT_RGBAF32LE; and from libavcodec case AV_PIX_FMT_RGBAF32LE: return BC_RGBA_FLOAT; did I miss something in setup parameters for this format?

1 0

Can I add a codec for compatibility and automatically keep the original?
by bbb 19 Nov '23

19 Nov '23

Hi, when I have a file using advanced subtitles, I often want to keep those for most devices but also add a basic subtitle format that is supported by my TV. So far, I've been converting the subtitles and after that, mapping the different subtitle format from the original and the output file into a final file in a second operation. Surely it would also be possible to map the original subtitles twice and then copy all codecs and convert only that of the second subtitle stream. I am planning to work on an automation (that works on a directory without knowing the number of streams in each file) and wondering, if ffmpeg maybe already has the kind of feature that I am looking for. Kind regards

2 2