Thanks Henk for your reply, I just learned something new with your post. Didn't know -crf would override -vb. I know the source video was encoded with x264 but, had other videos in different format. But, is great to know that tip before feeding videos.
Thanks a lot. On Sat, Jun 13, 2015 at 10:04 AM, Henk D. Schoneveld <[email protected]> wrote: > > On 13 Jun 2015, at 15:42, En Figureo Canal <[email protected]> > wrote: > > > On Sat, Jun 13, 2015 at 8:08 AM, Moritz Barsnick <[email protected]> > wrote: > > > >> Hi En, > >> > >> On Fri, Jun 12, 2015 at 14:23:24 -0400, En Figureo Canal wrote: > >>> Now, what other options are there using libx264, if any? > >> > >> Well, have you read my email? Why do I go to the trouble of writing > >> those things if you don't engage with it. > >> > >> E.g.: > >> > >>>> If you showed us the complete, uncut output, we could see what the > >>>> specs of your streams are and whether something is wrong. This way, > >>>> without more info, we don't even know which resolution your material > >>>> has. > >> > >> Have you shown us your uncut console output? > >> > >> And: > >> > >>>> - use a different preset (e.g. "-preset fast") > >>>> and experiment with both. > >>>> You could even copy the input stream, if its specs are sufficient. > That > >>>> reduces CPU significantly. > >> > >> Have you tried these things? What have you experimented? If the "fast" > >> preset doesn't suffice, try "ultrafast". Honestly, there can be a large > >> CPU difference. (I have achieved 3x from "faster" to "ultrafast" with > >> SD TV material.) > >> > >> Another thing: Is your libx264 and ffmpeg compiled with proper yasm > >> support? > >> > >> Moritz > >> > >> A: Because it messes up the order in which people normally read text. > >> Q: Why is top-posting such a bad thing? > >> A: Top-posting. > >> Q: What is the most annoying thing in e-mail? > >> _______________________________________________ > >> ffmpeg-user mailing list > >> [email protected] > >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user > >> > > > > > > Thank you Moritz Barsnick for replying again and taking your time to help > > me out with my problem. > > > > I do read your emails, if I'm top posting please pardon me. Gmail input > is > > what might be top posting. > > > > I experimented using "ultrafast" and indeed lowered the cpu stress to 50% > > which is a great improvement this is how I run the command: > > > > ffmpeg -re -i /video.mp4 -vcodec libx264 -s 640x360 -vb 1024k -crf 23 > > -preset ultrafast -pix_fmt yuv420p -maxrate 1256k -bufsize 1256k -ab 96k > -f > > flv rtmp://ip/live/test > > > > And this is the output: > > > > ffmpeg version 2.5.4 Copyright (c) 2000-2015 the FFmpeg developers > > built on Apr 27 2015 21:49:23 with gcc 4.7 (Debian 4.7.2-5) > > configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static > > --extra-cflags=-I/root/ffmpeg_build/include > > --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --enable-gpl > > --enable-libass --enable-libfdk-aac --enable-libfreetype > > --enable-libmp3lame --enable-libopus --enable-libtheora > --enable-libvorbis > > --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree > > libavutil 54. 15.100 / 54. 15.100 > > libavcodec 56. 13.100 / 56. 13.100 > > libavformat 56. 15.102 / 56. 15.102 > > libavdevice 56. 3.100 / 56. 3.100 > > libavfilter 5. 2.103 / 5. 2.103 > > libswscale 3. 1.101 / 3. 1.101 > > libswresample 1. 1.100 / 1. 1.100 > > libpostproc 53. 3.100 / 53. 3.100 > > Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/video.mp4': > > Metadata: > > major_brand : mp42 > > minor_version : 0 > > compatible_brands: isommp42 > > creation_time : 2015-03-03 16:28:42 > > Duration: 01:41:30.90, start: 0.000000, bitrate: 712 kb/s > > Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / > > 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 638 kb/s, 29.97 fps, > > 29.97 tbr, 30k tbn, 59.94 tbc (default) > If you look at the line above you see that your source already is h264, > and the bitrate being 712kb/s. > So encoding doesn’t make sense, at least not to me. -vcodec copy should > result in almost no CPU consuming at all. > Beside that -vb 1024k followed by -crf 23 also doesn’t make sense, the > last overrules the former, -crf ’takes’ what it needs for that quality > thereby ignoring -vb # > Further the used x264 library is from 2012, the last binary is from 24 feb > 2015, r2538 121396c, the newer versions will be more efficient. > > Metadata: > > handler_name : VideoHandler > > Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, > > fltp, 72 kb/s (default) > > Metadata: > > creation_time : 2015-03-03 16:29:33 > > handler_name : IsoMedia File Produced by Google, 5-11-2011 > > [libx264 @ 0x255e260] using SAR=1/1 > > [libx264 @ 0x255e260] using cpu capabilities: MMX2 SSE2Slow SlowCTZ > > [libx264 @ 0x255e260] profile Constrained Baseline, level 3.0 > > [libx264 @ 0x255e260] 264 - core 123 r2189 35cf912 - H.264/MPEG-4 AVC > codec > > - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: > cabac=0 > > ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 > > mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 > deadzone=21,11 > > fast_pskip=1 chroma_qp_offset=0 threads=3 sliced_threads=0 nr=0 > decimate=1 > > interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 > > keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc_lookahead=0 rc=crf > > mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=1256 > > vbv_bufsize=1256 crf_max=0.0 nal_hrd=none ip_ratio=1.40 aq=0 > > Output #0, flv, to 'rtmp://69.64.49.252/live/test': > > Metadata: > > major_brand : mp42 > > minor_version : 0 > > compatible_brands: isommp42 > > encoder : Lavf56.15.102 > > Stream #0:0(und): Video: h264 (libx264) ([7][0][0][0] / 0x0007), > > yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, 1024 kb/s, 29.97 fps, 1k > tbn, > > 29.97 tbc (default) > > Metadata: > > handler_name : VideoHandler > > encoder : Lavc56.13.100 libx264 > > Stream #0:1(und): Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), > > 44100 Hz, mono, fltp, 96 kb/s (default) > > Metadata: > > creation_time : 2015-03-03 16:29:33 > > handler_name : IsoMedia File Produced by Google, 5-11-2011 > > encoder : Lavc56.13.100 libmp3lame > > Stream mapping: > > Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264)) > > Stream #0:1 -> #0:1 (aac (native) -> mp3 (libmp3lame)) > > _______________________________________________ > > ffmpeg-user mailing list > > [email protected] > > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
