21 August

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 13:14
  Modifying FFmpeg and OpenCV source code to capture the RTP timestamp for each packet in NTP format - Fr0sty Newest 'ffmpeg' Questions - Stack Overflow
  I was trying a little experiment in order to get the timestamps of the RTP packets using the VideoCapture class from Opencv's source code in python, also had to modify FFmpeg to accommodate the changes in Opencv. Since I read about the RTP packet format.Wanted to fiddle around and see if I could manage to find a way to get the NTP timestamps. Was unable to find any reliable help in trying to get RTP timestamps. So tried out this little hack. Credits to ryantheseer on github for the modified code. Version of FFmpeg: 3.2.3 Version of Opencv: 3.2.0 In Opencv source code: (...) -- RTP packet format
• 13:09
  ffmpeg memory leak in the avcodec_open2 method - unresolved_external Newest 'ffmpeg' Questions - Stack Overflow
  I've developed an application which handles live video stream. The problem is that it should run as a service and over time I am noticing some memory increase. When I check the application with valgrind - it did not find any leak related issues. So I've check it with google profile tools. This is a result(substracting the one of the first dumps from the latest) after approximately 6 hour run: 30.0 35.7% 35.7% 30.0 35.7% av_malloc 28.9 34.4% 70.2% 28.9 34.4% av_reallocp 24.5 29.2% 99.4% 24.5 29.2% x264_malloc When I check the memory on the graph I see, that these allocations are related (...)
• 12:29
  How to secure HLS video file for offline playback in react native - Rakish Frisky Newest 'ffmpeg' Questions - Stack Overflow
  Hey currently I want to try to make an application to store our video and download it. I already encrypt the HSL Video file but to support full offline playback I would have to give the key along with the HLS video file. So how to make my HLS video only can be played in my apps? can someone help me to solve this problem? I already stuck for this problem in 2 weeks
• 10:55
  Android NDK Cross Compile FFmpeg, dlopen failed: cannot locate symbol - binglingziyu Newest 'ffmpeg' Questions - Stack Overflow
  Android NDK-r20 cross compile FFmpeg4.2 success, but my app crash with UnsatisfiedLinkError: dlopen failed: cannot locate symbol __aeabi_idiv This is the ffmpeg4.2 source code with my "build_android.sh" ffmpeg-android-build config the NDK r20 root path in "build_android.sh" $ cd ffmpeg-android-build $ ./build_android.sh $ make -j 4 $ make install This is my android project to test the ffmpeg ffmpeg-android-test Seemed the solution，don't know how to do in my situation #cannot-locate-symbols Excepted NDK-r20 and FFmpeg-4.2 is needed (cant change the version) My android test project (...) -- ffmpeg-android-build, ffmpeg-android-test, #cannot-locate-symbols

Revisions : SPIP http://core.spip.org/projects/spip/activity

• 09:31
  Révision 24374: Merge remote-tracking branch 'github/pr-40' - cam.lafit - Revisions : SPIP
  https://github.com/spip/SPIP/pull/40

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 09:42
  How to create a video from images with FFmpeg? - user3877422 Newest 'ffmpeg' Questions - Stack Overflow
  ffmpeg -r 1/5 -start_number 2 -i img%03d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 This line worked fine but I want to create a video file from images in another folder. Image names in my folder are: img001.jpg img002.jpg img003.jpg ... How could I input images files from a different folder? Example: C:\\mypics I tried this command but ffmpeg generated a video with the first image (img001.jpg) only. ffmpeg -r 1/5 -start_number 0 -i C:\\myimages\\img%03d.png -c:v libx264 -r 30 -pix_fmt yuv420p (...)
• 09:41
  ffmpeg - Converting MOV files to MP4 [closed] - user1503606 Newest 'ffmpeg' Questions - Stack Overflow
  I have just installed ffmpeg and I am trying to encode all my uploaded videos to .mp4 file. Most of the users currently upload .mov and I want to convert every video to .mp4. I am running the command as follows: ffmpeg -i movie.mov -vcodec copy -acodec cop out.mp4 But all I am getting is the following errors ffmpeg version 0.8.5, Copyright (c) 2000-2011 the FFmpeg developers built on Aug 19 2012 11:38:20 with clang 3.1 (tags/Apple/clang-318.0.61) configuration: --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-swscale --enable-avfilter --enable-libmp3lame (...)

Revisions : SPIP http://core.spip.org/projects/spip/activity

• 08:47
  Anomalie #4371 (En cours): Points-virgules mal placés - spip/prive/javascript/jquery.autosave.js - b b Revisions : SPIP
  Bien vu, dans ce cas il manque aussi un ; à la ligne 54, je te laisse compléter le patch ;)
• 05:39
  Révision 24373: Points-virgules mal placés - GitHub Revisions : SPIP
  Bonjour, ne pouvant "commiter" sur le core par SVN, je propose cette rectification ici. Cordialement, Eric
• 05:35
  Anomalie #4371 (En cours): Points-virgules mal placés - spip/prive/javascript/jquery.autosave.js - eldk - Revisions : SPIP
  Bonjour, Je joins le patch. Merci, Eric https://github.com/spip/SPIP/pull/40

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 06:53
  Trying to combine 2 FFmpeg commands - user11588722 Newest 'ffmpeg' Questions - Stack Overflow
  I have 2 FFmpeg commands which I need t combine, for the sake of speed. This one builds a simple slideshow using a list of images located on my remote server. ffmpeg -y -f concat -safe 0 -protocol_whitelist "file,http,https,tcp,tls" -i "Temp/images.txt" -filter_complex "[0]scale=7680x4320,zoompan=z='if(lte(zoom,1.0),1.2,max(1.001,zoom-0.0006))':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':fps=30:d=300" -c:v libx264 -preset veryfast -shortest "Temp/video.mp4" This one overlays the video we just created aswel as another video (marquee.mp4) and a showwaves effect ontop of a background image, (...)

Revisions : SPIP http://core.spip.org/projects/spip/activity

• 05:39
  Révision 24372: [Salvatore] [source:spip/ecrire/lang/ spip] Export depuis http://trad.spip.net de... - real3tⓐgmail.com Revisions : SPIP

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 03:58
  ffmpeg Video progressive automatic zoom in and out [on hold] - yong Newest 'ffmpeg' Questions - Stack Overflow
  I need to implement the effect of zooming in and out for video. Two operations are needed. The first operation is to set the zoom to zero at the beginning of the clip, and by the end of the clip the zoom was gradually increased twice. The second operation is that at the beginning of the video the zoom is equal to two, and by the end of the video the zoom should be zero. That is, it is necessary for the zoom to increase / decrease smoothly throughout the entire duration of the video. I know that Zoompad effect is used for this, but I could not use it for video. Thank you all in (...)
• 03:54
  Accidentally overwrote dylib files to usr/local/lib by copying lib from application bundle - random_permutation Newest 'ffmpeg' Questions - Stack Overflow
  I overwrote some of my dylib files in /usr/local/bin/ and now I'm having issues running a program. Is there a way of restoring these files back? The program ffmpeg was running fine for me. Then I installed the program GPAC and did the following: $ sudo cp MP4Box /usr/local/bin/ $ sudo cp -R /Applications/GPAC.app/Contents/MacOS/lib/* /usr/local/lib/ I did this because it would allow me to run MP4Box from the command line since /usr/local/lib/ is in $PATH. But now when I try running $ ffmpeg I get this error: dyld: Library not loaded: /usr/local/opt/sdl2/lib/libSDL2-2.0.0.dylib (...)
• 03:46
  ffmpeg How to record video without interruptions - teenserie Newest 'ffmpeg' Questions - Stack Overflow
  Recording http streams video y audio and through ffmpeg using this code ffmpeg -i "url" abc.mp4 But after a few minutes it interrupts Could it be caused that the http flow loses signal for a few seconds Is it possible with some code to restore the signal without interrupting the recording process? I also used this code But after 5-6 minutes they interrupt ffmpeg -y -i "url" -c:v copy -c:a copy -t 00:30:00 "myrecording.mp4" >"mylog.log" 2>&1
• 00:45
  How can I apply more than one colorkey filter, in an additive way? - Fabián Newest 'ffmpeg' Questions - Stack Overflow
  In my video there's an object that has shades of yellow (more orange-like) and a solid yellow as background. I need to output all frames into a png sequence, using many colorkey filters to replace 4 (four) specific yellow-ish colors from the background. This is what I tried: ffmpeg -ss 4 -i original.mp4 -t 2 -filter_complex "[0:v]colorkey=0xfff31b:0.125:0, colorkey=0xfae56b:0.125:0, colorkey=0xfaec46:0.125:0, colorkey=0xeee2a0:0.125:0[ckout]" -map "[ckout]" colorkeyrefined-%d.png However, it only applies the last specified colorkey. I need to apply the four of (...)
• 00:03
  FFMPEG color to transparencyq - Andrew L Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert a mp4 video with a completely uniform pink color to a mov file seuch that the pink color is transparent. I have run: ffmpeg -i input.mp4 -vf "chromakey=0xf25b98:0.01:0" -c copy -c:v png output.mov I confirmed that #f25b98 is the color I am replacing. This makes absolutely nothing transparent. When I try: ffmpeg -i input.mp4 -vf "chromakey=0xf25b98:0.02:0" -c copy -c:v png output.mov I get some weird transparent dots in my pink but still nothing is changed (see attached screenshot from video). Why would ffmpeg exhibit this (...) --

20 August

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 11:52
  avfilter/vf_v360: remove unused header - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  avfilter/vf_v360: remove unused header [DH] libavfilter/vf_v360.c
• 11:48
  avfilter/vf_v360: improve comments above headers - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  avfilter/vf_v360: improve comments above headers [DH] libavfilter/vf_v360.c
• 11:43
  doc/filters: fix typos - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  doc/filters: fix typos [DH] doc/filters.texi
• 11:41
  add v360 to Changelog - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  add v360 to Changelog [DH] Changelog
• 11:40
  doc/filters: fix v360 options names - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  doc/filters: fix v360 options names [DH] doc/filters.texi
• 05:46
  avformat/hlsenc: avformat/hlsenc: simplified code - Steven Liu git.videolan.org Git - ffmpeg.git/rss log
  avformat/hlsenc: avformat/hlsenc: simplified code simplified code for get dirname string in hls_delete_old_segments Signed-off-by: Steven Liu <lqⓐchinaffmpeg.org> [DH] libavformat/hlsenc.c
• 04:31
  avformat/hlsenc: simplified code of use_localtime in hls_init - Steven Liu git.videolan.org Git - ffmpeg.git/rss log
  avformat/hlsenc: simplified code of use_localtime in hls_init Signed-off-by: Steven Liu <lqⓐchinaffmpeg.org> [DH] libavformat/hlsenc.c
• 04:29
  avformat/hlsenc: fix memleak in update_variant_stream_info - Steven Liu git.videolan.org Git - ffmpeg.git/rss log
  avformat/hlsenc: fix memleak in update_variant_stream_info Signed-off-by: Steven Liu <lqⓐchinaffmpeg.org> [DH] libavformat/hlsenc.c
• 16:52
  avcodec/internal: Bump sane_nb_chanels - Michael Niedermayer git.videolan.org Git - ffmpeg.git/rss log
  avcodec/internal: Bump sane_nb_chanels This allows decoding more als reference samples Suggested-by: Thilo Borgmann <thilo.borgmannⓐmail.de> Reviewed-by: Thilo Borgmann <thilo.borgmannⓐmail.de> Signed-off-by: Michael Niedermayer <michaelⓐniedermayer.cc> [DH] libavcodec/internal.h
• 16:52
  avcodec/alsdec: Limit maximum channels to 512 - Michael Niedermayer git.videolan.org Git - ffmpeg.git/rss log
  avcodec/alsdec: Limit maximum channels to 512 There seems to be no limit in the specification and upto 64k could be stored 512 is choosen as limit as thats the maximum in a conformance sample An alternative to this patch would be a max_channels variable Fixes: OOM Fixes: 16200/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-5764788793114624 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Suggested-by: Thilo Borgmann <thilo.borgmannⓐmail.de> Reviewed-by: Thilo Borgmann <thilo.borgmannⓐmail.de> Signed-off-by: (...)

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 23:20
  How to import .pc from a pkgconfig folder using cmake? - Sailanarmo Newest 'ffmpeg' Questions - Stack Overflow
  I am currently building FFmpeg as an external project. FFmpeg builds correctly and the library is stuck inside an appropriate lib folder. And inside that lib folder a pkgconfig folder is placed inside with all of the .pc files with the information of all of the associated libraries. Of course, I could be thinking about this wrong. However when I built FFmpeg, I had to use a pkg_congig so it could link with the libraries of x264. Here is my ffmpeg_exteral.cmake file: SET_PROPERTY(DIRECTORY PROPERTY "EP_BASE" $ep_base) set( FFmpeg_url "https://github.com/FFmpeg/FFmpeg.git") set( FFmpeg_TAG (...)
• 20:47
  Can only save animation in matplotlib with default parameters - J.Doe Newest 'ffmpeg' Questions - Stack Overflow
  I keep getting this error when trying to save my animations in matplotlib: import numpy as np import matplotlib.pyplot as plt from matplotlib.animation import FuncAnimation plt.rcParams['animation.ffmpeg_path'] = 'C:\\FFmpeg\\bin' fig, ax = plt.subplots() ax.set_xlim(-0.1 ,2*np.pi + 0.1) ax.set_ylim(-1.1 ,1.1) ln, = plt.plot([], [], '-') x = np.linspace(0,2*np.pi,1000) def update(frame): y = frame*np.sin(x) ln.set_data(x,y) return ln, ani = FuncAnimation(fig, update, frames=np.linspace(1,-1,1000), interval=1000/144) ani.save('lol.gif') MovieWriter ffmpeg unavailable. Trying to use pillow (...) -- here, wikihow
• 20:18
  How to create a random video from a random picture annd random audio file - Francesco Milizia Newest 'ffmpeg' Questions - Stack Overflow
  I am working on a batch conversion process where I need to add a random picture (a .jpg) on a random .mp3 and make an .mp4. This is the code I am using in terminal Mac OS X putting all the .mp3 and the .jpg in the same folder: for f in *.mp3; do /usr/local/Cellar/ffmpeg/4.1_1/bin/ffmpeg -r 1 -loop 1 -i abc5.jpg -i "$f" -c:a copy -c:v libx264 -vf scale=1280:720 -shortest "$f%mp3mp4"; done It works great, but I don't know how to add another random feature for the .jpg files, so every time I have to put a different .jpg and change the name (usually in the file not in the script). I also (...)
• 18:04
  Use lutyuv to calculate u component from y component - user3931835 Newest 'ffmpeg' Questions - Stack Overflow
  In FFMpeg I use as filter lutyuv="y=0.000018712*val*val+0.0027334*val+1.3141:u=gammaval(1.09)" This works well. Now I want to calculate u value as a function of calculated y, something like u=1.1*previous_calculated_y*val. How can I access previously calculated y value in formula for u? Or how can I access y information in formula for u? Example: If y value was zero I would like to get for u = 1.3141*val. I googled and found nothing. lutyuv="y=0.000018712*val*val+0.0027334*val+1.3141:u=gammaval(1.09)"
• 16:03
  AVStream.codecpar equals zero (pointer not initialised) - LegendofPedro Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to decode an h.264 video with libavcodec 4.1 (58.55.100) from an .mp4 file with libavformat, but I can't extract the codec parameter info from the video stream. AVCodec *codec = NULL; AVFormatContext *avfmt = NULL; AVCodecParameters *codecpars = NULL; avfmt = avformat_alloc_context(); if(avformat_open_input(&avfmt, mp4filename, NULL, NULL) != 0) fatal("Failed to open container."); if(avformat_find_stream_info(avfmt, NULL) streams[video_stream]->codecpar->codec_id); printf("Stream #%1i index/id: %1i/%1i.\\r\\n", video_stream, avfmt->streams[video_stream]->index, (...) -- https://ffmpeg.org/doxygen/4.1/structAVStream.html, https://ffmpeg.org/doxygen/4.1/structAVCodecParameters.html
• 15:35
  Issue in installing ffmpeg on macOS 10.11 - Ravi barale Newest 'ffmpeg' Questions - Stack Overflow
  I am installing ffmpeg on macOS 10.11. using following command, brew install ffmpeg but always getting following error. Error: An exception occurred within a child process: ChecksumMismatchError: SHA256 mismatch Expected: 3b1634fa348c0f0064e43f3fb673e30a5e46f2b51cd6cd0d4a0cbf326e71c90e Actual: 34480b13120e2167060795060b6738c26622c341498cf6303b17b143642b14cd Archive: /Users/RackMini5/Library/Caches/Homebrew/downloads/0c113ab0098bc4c3f2e8f410741b6104f2928fe63eb38cf98f8dcc3362f02ac4--ef80617d1e17e0878a909baad62a75ba265c0e00.patch To retry an incomplete download, remove the file above. What (...)
• 15:04
  How to zoom in and out of a video using ffmpeg - Mahlatse Newest 'ffmpeg' Questions - Stack Overflow
  I want to zoom in for x amount of time then zoom out back to the original scale using FFmpeg is this possible I want to zoom in 150% for 5 seconds then zoom out to 100% for another 5 seconds
• 14:35
  I want to convert relay server nodejs http->websocket code version to java netty to spring-websocket - rura6502 Newest 'ffmpeg' Questions - Stack Overflow
  I want to rewrite this example(https://github.com/phoboslab/jsmpeg/blob/master/websocket-relay.js) to java using netty and spring-WebSocket. This nodejs example's HTTP server get the media data from FFmpeg and relay to the WebSocket. And then javascript library draws on the HTML Canvas. But My problem is that when I use netty, spring-WebSocket, some data cannot read by the javascript library and there are many data loss. In the example, this nodejs code's main part I think. http = require('http'), WebSocket = require('ws'); // setting websocket server .............. var streamServer = (...) -- https://github.com/phoboslab/jsmpeg/blob/master/websocket-relay.js, https://netty.io/wiki/user-guide-for-4.x.html
• 14:33
  Stream RTP to FFMPEG using SDP - Johnathan Kanarek Newest 'ffmpeg' Questions - Stack Overflow
  I get RTP stream from WebRTC server (I used mediasoup) using node.js and I get the decrypted RTP packets raw data from the stream. I want to forward this RTP data to ffmpeg and from there I can save it to file, or push it as RTMP stream to other media servers. I guess that the best way would be to create SDP file that describes both the audio and video streams and send the packets through new sockets. The ffmpeg command is: ffmpeg -loglevel debug -protocol_whitelist file,crypto,udp,rtp -re -vcodec libvpx -acodec opus -i test.sdp -vcodec libx264 -acodec aac -y output.mp4 I tried to send (...) -- mediasoup
• 12:30
  FFmpeg "Illegal instruction" Raspberry Pi Zero W - ErezM Newest 'ffmpeg' Questions - Stack Overflow
  I've been struggling with having FFmpeg run on Pi Zero W, as a newbie I can't say where the root of the problem whether its the compilation configuration of the FFmpeg or maybe the syntax of the command line itself.. The current configuration is: Raspberry Pi Zero Wireless Set GPU memory to 256 Running OS: Linux raspberrypi 4.19.66+ #1253 Thu Aug 15 11:37:30 BST 2019 armv6l GNU/Linux PRETTY_NAME="Raspbian GNU/Linux 10 (buster)" NAME="Raspbian GNU/Linux" VERSION_ID="10" VERSION="10 (buster)" VERSION_CODENAME=buster ID=raspbian ID_LIKE=debian No LSB modules are available. Distributor ID: (...) -- https://dl.dropboxusercontent.com/s/dxd285zrz6d57da/GOPR2546.MP4
• 11:20
  Only using 1 core when I converting video to tiff sequnce file - gsk Newest 'ffmpeg' Questions - Stack Overflow
  My workspace spec : CPU : Ryzen 1950x GPU : GTX 1080Ti RAM : 128GB SSD : 512GB samsung 960pro OS : window10 When I convert to tiff sequence file from my video(3min/mp4) CPU only used 1 core with 28 frame per sec. If I delete -pix_fmt rgb48le option can used more core and speed up(50 frame per sec). but, I need changing color space for making dcp... I already tried -threads option (0,1,2,16,32,64...) but still used 1 core. and found about GPU acceleration from other forum but I think tiff codec can't use CUDA. ./ffmpeg -i test.mp4 -q:v 1 -aspect 1.85 -s 1988:1080 -an -pix_fmt rgb48le (...)
• 11:03
  ffmpeg for windows: error when concatenating videos - Ginso Newest 'ffmpeg' Questions - Stack Overflow
  i have extracted a few clips from a video file of resolution 1920x816 called ca0.mp4...ca9.mp4 using the command ffmpeg -i ./ca.mkv -ss 00:53:24 -t 00:01:30 ca0.mp4 Then i created a black video using ffmpeg -f lavfi -i color=black:s=1920x816:r=24000/1001 -f lavfi -i anullsrc -ar 48000 -ac 2 -t 00:00:02 empty.mp4 now i want to concencate the clips with the black video between them. Therefore i created a file list.txt: file 'ca0.mp4' file 'empty.mp4' file 'ca1.mp4' file 'empty.mp4' file 'ca2.mp4' file 'empty.mp4' file 'ca3.mp4' file 'empty.mp4' file 'ca4.mp4' file 'empty.mp4' file (...)
• 11:49
  How to link libav* libraries of FFmpeg in my own program? - zuguorui Newest 'ffmpeg' Questions - Stack Overflow
  I am new to FFmpeg, now I want to use the FFmpeg codec compenet in my own program. I've followed the guide on FFmpeg wiki to complie the libraries the FFmpeg and get them done. But when I compile my own program it always tips ld: library not found for -lavutil or something like this. Environment：MacOS 10.14.6 Compile tool: clang++ steps: (1)Install all needed libraries follow the wiki. (2)./configuure --prefix=host --enable-shared --disable-static (3)make (4)make install, after this step, I got compiled files in dictionary host. (5)copy the source code in (...)
• 11:24
  Sync a video stream at two separate receivers - Quasar Newest 'ffmpeg' Questions - Stack Overflow
  I want to use two separate receivers which both are receiving the same video stream. One of the receivers does some processing tasks and pass the results to the other receiver (using web-socket or a RESTFUL API) so that the second receiver displays the results and play the video(the frames and result values should be synchronized in the second receiver). The actual issue is how to synchronize these receivers over the IP network. Note that it is highly preferred that each one can read the stream by its own and I want to prevent resending the stream to the other receiver. A possible (...)

Newest 'x264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/x264

• 11:02
  How does one encode a series of images into H264 using the x264 C API? - Rella Newest 'x264' Questions - Stack Overflow
  How does one use the x264 C API to encode RBG images into H264 frames? I already created a sequence of RBG images, how can I now transform that sequence into a sequence of H264 frames? In particular, how do I encode this sequence of RGB images into a sequence of H264 frame consisting of a single initial H264 keyframe followed by dependent H264 frames?

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 07:08
  Is there a way to reduce cpu usage when using colormatrix filter in ffmpeg - Noh Jongcheol Newest 'ffmpeg' Questions - Stack Overflow
  I am making a recording program using ffmpeg. I had a problem that a recording video's color is incorrect, and I found an option -vf colormatrix=bt601:bt709. This option work nicely, but has cpu usage about 4~5% in my computer. The recording program is a subprogram of larger program and the program has large cpu usage, so I want to reduce cpu usage of recording program. There is a way to reduce cpu usage when using -vf colormatrix or another way can change (...)
• 07:31
  FFMPEG - Pipe PCM to STDOUT in real-time for Node.js - bloom.510 Newest 'ffmpeg' Questions - Stack Overflow
  I am able to stream realtime PCM data from my system's loopback driver that I can either encode raw or in WAV format using FFMPEG. How can I pipe the PCM to stdout as its being recorded in real-time? I'm batting around in the dark here. So far I've tried logging stdout in Node.js, as well as creating a named pipe and listening for changes to it. None of these has returned any output. The basic shell command captures the audio: ffmpeg -f alsa -i loopout -f s16le -acodec pcm_s16le out.raw Using child_process.spawn() in Node.js: let ffmpeg = spawn('ffmpeg', [ '-f', 'alsa', '-ac', '2', (...)

Revisions : SPIP http://core.spip.org/projects/spip/activity

• 05:41
  Révision 24371: [Salvatore] [source:spip/ecrire/lang/ spip] Export depuis http://trad.spip.net - salvatoreⓐrezo.net Revisions : SPIP

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 03:56
  avformat/hlsenc: reindent code - Steven Liu git.videolan.org Git - ffmpeg.git/rss log
  avformat/hlsenc: reindent code and remove redundant empty line [DH] libavformat/hlsenc.c
• 03:45
  avformat/hlsenc: remove unuse comment of the code - Steven Liu git.videolan.org Git - ffmpeg.git/rss log
  avformat/hlsenc: remove unuse comment of the code [DH] libavformat/hlsenc.c

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 04:12
  How to remove or attenuate background noise in videos - David Newest 'ffmpeg' Questions - Stack Overflow
  Tried removing typical background noise (low volume TV, indoor and outdoor air-conditioner/fan) from videos using following code. Didn't work. Would appreciate advice on how to do this. ffmpeg -loglevel warning -y -strict -2 -i IN.mts -af "highpass=f=200, lowpass=f=3000" OUT.mts SHORT SAMPLE VIDEOS: low volume TV in background: https://youtu.be/wOQuKgDeC5A Inside air conditioner or fan: https://youtu.be/BTDFtH3vksY Outside air conditioner: https://youtu.be/EeSyKM25Gig -- https://youtu.be/wOQuKgDeC5A, https://youtu.be/BTDFtH3vksY, https://youtu.be/EeSyKM25Gig
• 03:59
  ffmpeg not working with filenames that have whitespace - cmw Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFMPEG to measure the duration of videos stored in an Amazon S3 Bucket. I've read the FFMPEG docs, and they explicitly state that all whitespace and special characters need to be escaped, in order for FFMPEG to handle them properly: See docs 2.1 and 2.1.1: https://ffmpeg.org/ffmpeg-utils.html However, when dealing with files whose filenames contain whitespace, ffmpeg fails to render a result. I've tried the following, with no success ffmpeg -i "http://s3.mybucketname.com/videos/my\\ video\\ file.mov" 2>&1 | grep Duration | awk 'print $2' | tr -d ffmpeg -i (...) -- https://ffmpeg.org/ffmpeg-utils.html
• 03:35
  FFMPEG HLS streaming and transcoding on the fly to HTML player - video duration changes while transcoding - Thomas Tho Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to make a video streaming server and watch videos directly from web browser. The idea is to make the server to stream video from remote server, transcode with different audio format in local server, and then instantly stream to the client (this is specific way I need it to function). This is the FFMPEG code im currently using: ffmpeg -i "url" -c:v copy -c:a aac -ac 2 -f hls -hls_time 60 -hls_playlist_type event -hls_flags independent_segments out.m3u8 The HLS stream is attached to the HTML player with hls.js and it works. However, the video duration is constantly changing (...)
• 03:26
  `sage -pip install --user ffmpeg` did not make the "`OSError: Error: ffmpeg does not appear to be installed.`" message go away - SomeoneElse Newest 'ffmpeg' Questions - Stack Overflow
  I am running a Docker instance of Cocalc on a Ubuntu 16 server. Everything seems to be working but I am trying to debug why sage -pip install --user ffmpeg did not make the "OSError: Error: ffmpeg does not appear to be installed." message go away, even though it said it had been installed. Here is the full message. Error in lines 9-9 Traceback (most recent call last): File "/usr/local/sage/local/lib/python2.7/site-packages/smc_sagews/sage_server.py", line 1188, in execute flags=compile_flags) in namespace, locals File "", line 1, in File (...)
• 00:31
  FFMPEG HLS streaming and transcodding on the fly to HTML player - video duration changes while transcoding - Thomas Tho Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to make a video streaming server and watch videos directly from web browser. The idea is to make the server to stream video from remote server, transcode with different audio format in local server, and then instantly stream to the client (this is specific way I need it to function). This is the FFMPEG code im currently using: ffmpeg -i "url" -c:v copy -c:a aac -ac 2 -f hls -hls_time 60 -hls_playlist_type event -hls_flags independent_segments out.m3u8 The HLS stream is attached to the HTML player with hls.js and it works. However, the video duration is constantly changing (...)