On Sun, 22 Jul 2018 at 20:00, Marton Balint <[email protected]> wrote: > > > On Wed, 18 Jul 2018, Micael Silva wrote: > > > On Wed, Jul 18, 2018 at 8:13 AM, Jon <[email protected]> wrote: > > > >> On Tue, 17 Jul 2018 at 23:15, Carl Eugen Hoyos <[email protected]> wrote: > >> > > >> > 2018-07-17 20:16 GMT+02:00, Jon <[email protected]>: > >> > > After successfully compiling ffmpeg on Debian 9 64bit, following the > >> > > instructions at https://trac.ffmpeg.org/wiki/CompilationGuide and > >> > > adding the relevant includes for NDI using the Newtek SDK > >> > > (InstallNDISDK_v3_Linux.sh from https://www.newtek.com/ndi/sdk/) and > >> > > compiler flag (--enable-libndi_newtek), the resulting builds of ffmpeg > >> > > / ffplay do now playback NDI network streams but playback performance > >> > > is poor compared to playing back through OBS using the NDI plug-in > >> > > from https://github.com/Palakis/obs-ndi on the same machine. OBS has > >> > > smooth playback whereas ffmpeg is jittery. > >> > > > >> > > ./ffplay -fs -f libndi_newtek -i "NDI test (test-laptop-pgm)" > >> > > >> > Complete, uncut console output missing. > >> > Do you see the same jitter if you reencode with ffmpeg? > >> > > >> > Carl Eugen > >> > >> Thanks for your prompt reply Carl. > >> > >> Output from ffplay which produces glitchy playback: > >> > >> $ ./ffplay -fs -f libndi_newtek -i "COMPUTER (jonny-ndi-pgm)" > >> ffplay version N-91482-g8aa6d9a Copyright (c) 2003-2018 the FFmpeg > >> developers > >> built with gcc 7 (Debian 7.3.0-25) > >> configuration: --prefix=/home/blitz/ffmpeg_build > >> --pkg-config-flags=--static > >> --extra-cflags=-I/home/blitz/ffmpeg_build/include > >> --extra-ldflags=-L/home/blitz/ffmpeg_build/lib --extra-libs='-lpthread > >> -lm' --bindir=/home/blitz/bin --enable-gpl --enable-libaom > >> --enable-libass --enable-libfdk-aac --enable-libfreetype > >> --enable-libmp3lame --enable-libopus --enable-libvorbis > >> --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree > >> --enable-libndi_newtek > >> libavutil 56. 18.102 / 56. 18.102 > >> libavcodec 58. 21.105 / 58. 21.105 > >> libavformat 58. 17.101 / 58. 17.101 > >> libavdevice 58. 4.101 / 58. 4.101 > >> libavfilter 7. 26.100 / 7. 26.100 > >> libswscale 5. 2.100 / 5. 2.100 > >> libswresample 3. 2.100 / 3. 2.100 > >> libpostproc 55. 2.100 / 55. 2.100 > >> Input #0, libndi_newtek, from 'COMPUTER (jonny-ndi-pgm)':0B f=0/0 > >> Duration: N/A, start: 3258.294488, bitrate: 443779 kb/s > >> Stream #0:0: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s > >> Stream #0:1: Video: rawvideo (UYVY / 0x59565955), > >> uyvy422(progressive), 1280x720 [SAR 1:1 DAR 16:9], 442368 kb/s, 30 > >> fps, 30 tbr, 10000k tbn > >> 3275.05 A-V: -0.001 fd= 1 aq= 114KB vq=16200KB sq= 0B f=0/0 > > You should try these ffplay options > -infbuf > -sync video or -sync ext > -noframedrop > Or a combination of those :) > > Thanks, > Marton
Excellent tip! Thanks Marton. Using both "-infbuf" and "-sync video" did the trick. _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
