How many CPUs / cores are you using? Transcoding FullHD in SD, without using any hardware accelleration for more than two channels seems a quite huge load. It can be simply your CPU cannot go fast enough
-----Original Message----- From: ffmpeg-user [mailto:ffmpeg-user-boun...@ffmpeg.org] On Behalf Of Hendrik Karsimin Sent: 13 June 2017 14:03 To: ffmpeg-user@ffmpeg.org Subject: [FFmpeg-user] FPS drop when transcode 3 Full HD channel to SD Warning: This message has had one or more attachments removed Warning: (encode_cna.out.log, encode_okto.out.log, when 3 ffmpeg running.zip, encode_suria.out.log). Warning: Please read the "vision247.com-Attachment-Warning.txt" attachment(s) for more information. Hi, I've been trying to transcode the Full HD Channel (1920x1080) to SD (720x576). When I transcode 1 channel, the resulting video is no problem. So are when transcode 2 channel. But when the 3rd channel I tried to transcode start. the FPS start to drop on all the channel I transcoding. I'm not sure if it's a computer hardware limitation or the software limitation. But I have tried to change some parameter of ffmpeg, and settle on the last ffmpeg configuration I use now. Attached is the information I collect on the PC I use to transcode. The Ubuntu Version I use is Ubuntu 14.04.5 #lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.5 LTS Release: 14.04 Codename: trusty #uname -a Linux Compaq 3.13.0-119-generic #166-Ubuntu SMP Wed May 3 12:18:55 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux Need advice to resolve this problem. *Thanks & regards,* Hendrik _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
