Re: [FFmpeg-user] Compiled ffmpeg - x264 - instability when using -pix_fmt yuv420p

2019-09-12 Thread Carl Eugen Hoyos
Am Do., 12. Sept. 2019 um 21:15 Uhr schrieb Jonathan Niquet : > just realized i forgot some important information: > this is for ffmpeg 4.1.1 but I also tried 4.2.1 and the exact same behavior > was observed: But only current FFmpeg git head is supported. Backtrace, disassembly and register

Re: [FFmpeg-user] Compiled ffmpeg - x264 - instability when using -pix_fmt yuv420p

2019-09-12 Thread Jonathan Niquet
just realized i forgot some important information: this is for ffmpeg 4.1.1 but I also tried 4.2.1 and the exact same behavior was observed: And here's the log: jniquet@mtl-rmw001l bin $ ./ffmpeg -start_number 1160 -v 48 -y -r 23.98 -t 0.0417014178482 -i

[FFmpeg-user] Compiled ffmpeg - x264 - instability when using -pix_fmt yuv420p

2019-09-12 Thread Jonathan Niquet
Hey there, We've been using John Van Sickle's ffmpeg static build for quite a while and it's worked wonderfully for us. However, we recently had to incorporate aac into our build. I then started to statically compile every library we needed and proceed to successfully build FFmpeg. This is on

Re: [FFmpeg-user] V360 filter

2019-09-12 Thread Paul B Mahol
On 9/12/19, Michael Koch wrote: > Am 12.09.2019 um 14:05 schrieb Paul B Mahol: >> On 9/12/19, Michael Koch wrote: >>> Paul, >>> >> Make this correction: >> >> new_fov = 180 * tan(fov/4) >> >> where fov the the field of view you get from the command line, and >> fov_new is

Re: [FFmpeg-user] V360 filter

2019-09-12 Thread Michael Koch
Am 12.09.2019 um 14:05 schrieb Paul B Mahol: On 9/12/19, Michael Koch wrote: Paul, Make this correction: new_fov = 180 * tan(fov/4) where fov the the field of view you get from the command line, and fov_new is the value that you use for the filter. You must exclude values too close to

Re: [FFmpeg-user] V360 filter

2019-09-12 Thread Paul B Mahol
On 9/12/19, Michael Koch wrote: > Paul, > >> Make this correction: new_fov = 180 * tan(fov/4) where fov the the field of view you get from the command line, and fov_new is the value that you use for the filter. You must exclude values too close to 360°, because

Re: [FFmpeg-user] V360 filter

2019-09-12 Thread Michael Koch
Paul, Make this correction: new_fov = 180 * tan(fov/4) where fov the the field of view you get from the command line, and fov_new is the value that you use for the filter. You must exclude values too close to 360°, because 360° stereographic projection is impossible. P.S. of course fov

Re: [FFmpeg-user] Resolving -filter_complex overlay / -vf yadif conflicts in subprocess call Python script

2019-09-12 Thread digitensions via ffmpeg-user
Thank you Carl. Point taken. I will investigate making it optional, then we just have the operators knowledge to rely on… Many thanks too Reto. Joanna > On 11 Sep 2019, at 21:37, Carl Eugen Hoyos wrote: > > Am Mi., 11. Sept. 2019 um 14:08 Uhr schrieb Gyan : > >> ffmpeg -i input_file -i

Re: [FFmpeg-user] ffmpeg to stream an already h.264 encoded stream

2019-09-12 Thread Verachten Bruno
Thanks a lot Moritz, that did the trick. So I now have: ffmpeg -i "$SOURCE" -thread_queue_size 2048 -f pulse -i "$AUDIO_SOURCE" -c:v copy -map 0:v:0 -map 1:a:0 -c:a libmp3lame -f tee "[f=flv:onfail=ignore]$YOUTUBE_URL/$KEY|[f=flv:onfail=ignore]local_file.mkv" which gives Output #0, tee, to