[Ffmpeg-devel-irc] ffmpeg-devel.log.20181230

[burek]

[02:36:31 CET] <sh4rm4^bnc> hi, the configure script of ffmpeg is trying to execute this command:
[02:36:32 CET] <sh4rm4^bnc> ++ sed -E -n 's/^extern AVFilter ff_([avfsinkrc]{2,5})_([a-zA-Z0-9_]+);/\2_filt$
[02:36:32 CET] <sh4rm4^bnc> /bin/sed: unrecognized option: E
[02:36:59 CET] <sh4rm4^bnc> i can't find any info about what the option -E is supposed to do
[02:37:54 CET] <sh4rm4^bnc> it's not even documented in the online manpages of GNU sed (i don't use GNU sed)
[02:40:30 CET] <iive> -E, -r, --regexp-extended              use extended regular expressions in the script (for portability use POSIX -E).  sed 4.7
[02:41:08 CET] <sh4rm4^bnc> ah. could i ask about changing that to -r then ? that one is supported
[02:42:23 CET] <sh4rm4^bnc> nevermind. i see latest busybox has added support for it.
[02:42:40 CET] <iive> it is recommended to use posix sed :P
[02:42:53 CET] <sh4rm4^bnc> yeah busybox strives to be POSIX compliant
[02:42:57 CET] <sh4rm4^bnc> unlike GNU
[02:43:31 CET] <sh4rm4^bnc> i also get a ton of "pr: command not found" but it seems to work anyway
[02:45:37 CET] <BradleyS> iirc there was some discussion recently on making sed commands more compatible
[02:45:50 CET] <BradleyS> perhaps there's more info on the ffmpeg-devel mailing list
[02:49:08 CET] <sh4rm4^bnc> + pr -n -t /tmp/ffconf.XXeihohl/test.c
[02:49:08 CET] <sh4rm4^bnc> ./configure: line 505: pr: command not found
[02:49:31 CET] <sh4rm4^bnc> never heard of "pr" before...
[02:50:38 CET] <sh4rm4^bnc> aha, seems to be POSIX. so i guess i gotta get it somehow. http://pubs.opengroup.org/onlinepubs/9699919799/utilities/pr.html
[06:34:54 CET] <mostafa_s> Hi how get video thumbnail (Windows 10 )
[13:43:10 CET] <cone-582> ffmpeg 03Paul B Mahol 07master:7312e027d6d3: avfilter/af_afir: introduce AudioFIRSegment structure and use it
[13:43:10 CET] <cone-582> ffmpeg 03Paul B Mahol 07master:e57053417a09: avfilter/af_afir: move allocation stuff where it belongs
[13:43:10 CET] <cone-582> ffmpeg 03Paul B Mahol 07master:c343e81ffd30: avfilter/af_afir: introduce init_segment() and use it
[13:43:10 CET] <cone-582> ffmpeg 03Paul B Mahol 07master:8007e8fc67e3: avfilter/af_afir: fix minp/maxp range and change default value for maxp
[13:43:10 CET] <cone-582> ffmpeg 03Paul B Mahol 07master:30bf54b9f3ac: avfilter/af_afir: introduce uninit_segment() and use it
[13:43:10 CET] <cone-582> ffmpeg 03Paul B Mahol 07master:1ba909fabef2: avfilter/af_afir: use segment pointer
[13:43:11 CET] <cone-582> ffmpeg 03Paul B Mahol 07master:6095356d5b1e: avfilter/af_afir: use AVFrame for coeff too
[13:43:12 CET] <cone-582> ffmpeg 03Paul B Mahol 07master:31c9d693aa70: avfilter/af_afir: make number of segments extendable
[13:43:13 CET] <cone-582> ffmpeg 03Paul B Mahol 07master:3c3eb4930eb4: avfilter/af_afir: make part_index values per channel
[13:43:14 CET] <cone-582> ffmpeg 03Paul B Mahol 07master:300dc45fdca4: avfilter/af_afir: properly split IR into multiple segments
[13:43:15 CET] <cone-582> ffmpeg 03Paul B Mahol 07master:a53a9f1c8d1f: avfilter/af_afir: implement non-uniform partitioned convolution
[15:36:53 CET] <spottich> re hy
[15:37:03 CET] <spottich> could anybody help me by develop an windows command for convert an rtsp stream to an mjpeg stream
[15:37:16 CET] <spottich>  ffmpeg -y -i rtsp://stream.sdp -c copy -f hls -hls_time 3 -hls_list_size 3 -hls_wrap 10 http://localhost:8090/channel1.mjpg
[16:04:40 CET] <BtbN> You should ask that in #ffmpeg
[16:05:01 CET] <spottich> yeah but nobody answer ther at hours
[16:05:04 CET] <spottich> thx
[16:10:58 CET] <BtbN> Keep in mind that ffmpeg does not offer an http server, you will have to use apache or something to serve an hls stream.
[16:24:11 CET] <spottich> ah ok
[16:24:35 CET] <spottich> yes i find it out because windows hasnt an ffserver  module
[16:25:05 CET] <spottich> i only must place an mjpeg stream on my houseintern webside 
[17:27:43 CET] <durandal_1707> TRRRRRROOOOOOOOOOOLLLLLLLLLLL
[17:35:00 CET] <cone-937> ffmpeg 03Alex Mogurenko 07master:e4788ae31b2e: avcodec/prores_ks: Fix luma quantization if q >= MAX_STORED_Q
[17:51:38 CET] <cone-937> ffmpeg 03Paul B Mahol 07master:72270d5bd071: avfilter/af_afir: optimize code a little more
[17:51:39 CET] <cone-937> ffmpeg 03Paul B Mahol 07master:ba3d983c95b2: avfilter/af_afir: stop using as much threads as stream have it
[18:40:18 CET] <durandal_1707> what is mmsize for avx and what mmsize is for sse3 ?
[18:41:15 CET] <atomnuker> 32 vs 16
[18:44:22 CET] <durandal_1707> looks like fftw3 have avx and is faster then our simd
[18:46:21 CET] <atomnuker> yeah right
[18:46:46 CET] <atomnuker> we have avx and should be faster because we don't generalize
[18:50:04 CET] <durandal_1707> atomnuker: gonna send a patch?
[18:51:10 CET] <atomnuker> can I see a benchmark? some old ones I've seen had lavc's fft as being faster
[19:01:57 CET] <durandal_1707> atomnuker: not really, i benchmark zita_convolver effect from https://github.com/bmc0/dsp versus afir from libavfilter and my implementation is sometimes up to 2x slower, but for cases that number of min and max partitions is same my implementatio is several times faster somehow
[19:02:55 CET] <durandal_1707> reason could be suboptimal partitioning on my side when minp != maxp
[19:09:47 CET] <atomnuker> is afir that slow?
[19:10:54 CET] <durandal_1707> atomnuker: only for minp <<< maxp
[19:11:23 CET] <durandal_1707> then several fft of different sizes is used
[19:11:28 CET] <cone-937> ffmpeg 03Zachary Zhou 07master:b6b3159b04af: lavfi/vaapi: Add constant VAAPI_VPP_BACKGROUND_BLACK
[19:26:28 CET] <durandal_1707> i hate this troll
[19:34:01 CET] <kierank> durandal_1707: who, nicholas?
[19:34:30 CET] <durandal_1707> yes, bring him down!
[21:05:34 CET] <cone-937> ffmpeg 03Marton Balint 07master:f9e947845f9a: avfilter/af_asetnsamples: fix last frame props
[21:42:18 CET] <cone-937> ffmpeg 03Marton Balint 07master:7f42276aa91c: avformat/concatdec: always allow seeking to start
[22:14:33 CET] <cone-937> ffmpeg 03Paul B Mahol 07master:ea3a980a610e: avfilter/af_afir: do not over allocate fft buffer
[22:33:01 CET] <cone-937> ffmpeg 03Paul B Mahol 07master:3e8f211d8685: avfilter/vf_chromashift: remove invalid offset
[00:00:00 CET] --- Mon Dec 31 2018