On Sat, Jan 23, 2021 at 12:17 AM Hongyi Zhao <[email protected]> wrote: > > On Ubuntu 20.10, I compile the latest git master version of fmpeg with > exhaustive options as shown below: > > $ ffmpeg -h |& grep configuration: > configuration: --enable-gpl --enable-nonfree --enable-version3 > --enable-debug --enable-ffplay --enable-indev=sndio > --enable-outdev=sndio --enable-fontconfig --enable-frei0r > --enable-openssl --enable-gmp --enable-libgme --enable-gray > --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf > --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb > --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband > --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis > --enable-libopus --enable-libtheora --enable-libvidstab > --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp > --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d > --enable-libxvid --enable-libzvbi --enable-libzimg --enable-rpath > --enable-shared --enable-avisynth --enable-chromaprint --enable-gcrypt > --enable-ladspa --enable-libaribb24 --enable-libbluray > --enable-libbs2b --enable-libcaca --enable-libcelt --enable-libcdio > --enable-libcodec2 --enable-libdc1394 --enable-libfdk-aac > --enable-libflite --enable-libfontconfig --enable-libgsm > --enable-libiec61883 --enable-libjack --enable-libklvanc > --enable-liblensfun --enable-libmodplug --enable-libopenh264 > --enable-libopenmpt --enable-libpulse --enable-librabbitmq > --enable-librsvg --enable-librtmp --enable-libshine --enable-libsnappy > --enable-libssh --enable-libtesseract --enable-libtwolame > --enable-libv4l2 --enable-libxavs2 --enable-libdavs2 --enable-libxcb > --enable-libxcb-shm --enable-libxcb-xfixes --enable-libxcb-shape > --enable-libzmq --enable-lv2 --enable-libmysofa --enable-openal > --enable-opencl --enable-opengl --enable-pocketsphinx --enable-vulkan > --enable-libdrm --enable-libmfx --enable-pic --enable-lto > --enable-hardcoded-tables --enable-memory-poisoning --enable-ftrapv > --enable-linux-perf --enable-libsvtav1 > > > Then I try to stream my desktop withe following command based on the > instructions given by > <https://trac.ffmpeg.org/wiki/EncodingForStreamingSites>: > > $ ffmpeg -f pulse -i default -f x11grab -framerate 60 -video_size > 1920x1080 -i :1+0,0 \ > -c:v libx264 -preset veryfast -b:v 3000k -maxrate 3000k -bufsize 3000k \ > -vf "scale=1280:-1,format=yuv420p" -g 60 -c:a aac -b:a 128k -ar 44100 \ > -f flv "rtmp://127.0.0.1:1935/live" > > Then I try to play the streamed desktop with the following command: > > $ ffplay rtmp://127.0.0.1:1935/live > > But I observed a very strange phenomenon: the frames will > stack/overlay together when I play them in the ffplay as shown in the > attachment file.
After some thinking, I understood the reason. To be simple, if we stream the desktop and afterwards play it in situ, the problem will happen. Obviously, for the case of stream one's desktop, it should be played/pulled on another desktop. Best regards, -- Assoc. Prof. Hongyi Zhao <[email protected]> Theory and Simulation of Materials Hebei Polytechnic University of Science and Technology engineering NO. 552 North Gangtie Road, Xingtai, China _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
