![]() ![]() ![]() The processing demands from high quality video applications have pushed limits for broadcast and telecommunication networks. As of July 2019 Kepler, Maxwell, Pascal, Volta and Turing generation GPUs support hardware encoding, and Fermi, Kepler, Maxwell, Pascal, Volta and Turing generation GPUs support hardware decoding. Input #0, matroska,webm, from 'sample.mkv':ĭuration: 00:00:29.80, start: 0.All NVIDIA GPUs starting with the Kepler generation support fully-accelerated hardware video encoding, and all GPUs starting with Fermi generation support fully-accelerated hardware video decoding. Output of ffprobe -show_streams filename: ffprobe version 0.10.3 Copyright (c) 2007-2012 the FFmpeg developersīuilt on 17:51:07 with gcc 4.7.0 20120505 (prerelease)Ĭonfiguration: -prefix=/usr -enable-libmp3lame -enable-libvorbis -enable-libxvid -enable-libx264 -enable-libvpx -enable-libtheora -enable-libgsm -enable-libspeex -enable-postproc -enable-shared -enable-x11grab -enable-libopencore_amrnb -enable-libopencore_amrwb -enable-libschroedinger -enable-libopenjpeg -enable-librtmp -enable-libpulse -enable-gpl -enable-version3 -enable-runtime-cpudetect -disable-debug -disable-static When encoding to MPG, it does get copied over and I get an exact copy, with the player switching sizes, but not with MKV. This SAR value isn't getting copied over when encoding to MKV. It seems each frame is tagged with a Sample Aspect Ratio (SAR), so when the player plays it, it can find the display aspect ratio. The player size actually changes, atleast in mplayer, when the resolution is switched. the 16:9 parts to scale to 16:9, while the 4:3 parts scale to 4:3? How can I maintain the dynamic aspect ratio of the input video file i.e. The problem is that after the scaling, the resolution constantly becomes 4:3 (360x288). Also, VLC detects it's resolution as 720x576. I use ffmpeg -i -vf scale=iw/2:-1 -acodec copy. ![]() I want to scale this video down 3 times, while copying all the other attributes (audio codec, subtitles etc.). I have the first few seconds of widescreen 16:9 (1024x576) resolution, and the rest of the video if 4:3 (768x576) resolution. ![]() I have a mkv video, which is a mix of multiple resolution recordings, e.g. ![]()
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