29 October

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 22:01
  Unknown decoder 'libx264' - Reboot_My_Computer Newest 'libx264' Questions - Stack Overflow
  I have ffmpeg with libx264 enabled from BtbN for Windows 10. This is the command: ffmpeg -f gdigrab -c:v libx264 -framerate 30 -i title="FiveM" -f flv rtmp://MYSITE.COM/stream/MYSECRETKEY Unfortunately I get this output: Unknown decoder 'libx264' -- BtbN
• 20:37
  Why i can't use libx264 with FFMPEG on windows? - Reboot_My_Computer Newest 'libx264' Questions - Stack Overflow
  Hello there I'm trying to build game launcher that will start streaming when game starts, for this i am using FFMPEG. It all works fine until i try to use libx264 as encoder.I have FFMPEG with libx264 compiled from https://github.com/BtbN/FFmpeg-Builds/releases. This is the command i am using for it : ffmpeg -f gdigrab -c:v libx264 -framerate 30 -i title="FiveM" -f flv rtmp://MYSITE.COM/stream/MYSECRETKEY Unfortunately i get this output: FFMPEG OUTPUT You can clearly see in output picture that FFMPEG is compiled with libx264, please note that i'm (...) -- https://github.com/BtbN/FFmpeg-Builds/releases, FFMPEG OUTPUT

28 October

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 08:48
  How do I force an IDR-frame using the x264 C API? - Keith Newest 'libx264' Questions - Stack Overflow
  I am attempting to use an external bool signal to force the next encoded frame to be an IDR-frame using the x264 C API. I am using the "baseline" profile with the "ultrafast" and "zerolatency" presets. I tried to use the input pic settings prior to encoding, as in this code snippet, but this has not worked. My class Open() and Encode() methods are shown here. Any help will be appreciated. int X264Encoder::Open(void) if (_x264VideoEncoder != NULL) Close(); // Set up default parameters. if (x264_param_default_preset(&_param, _encoderSpeedPreset.c_str(), (...)

25 October

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 23:12
  What ffmpeg arguments will approximate Zoom recording quality [closed] - Stan Ivanov Newest 'libx264' Questions - Stack Overflow
  I've been recording screen sharing presentations using Quicktime on my Mac and it uses x264 format with ~60fps. The produced video file is with type MOV and around 2.2GB for 1 hour of presentation. I want to compress it using ffmpeg and I've been doing so using x264 as well. Here are my arguments: ffmpeg -i '$inputFile' -vcodec "libx264" -crf 32 -vf 'scale=$width:-2,fps=24' -c:a aac -b:a 128k -preset veryslow -profile:v high -tune stillimage -f mp4 '$outputFile' I rescale my video to 1600px width to save on space and I also convert the (...)

16 October

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 20:33
  FFMPEG RTSP stream to MPEG4/H264 file using libx264 - Phi Newest 'libx264' Questions - Stack Overflow
  Heyo folks, I'm attempting to transcode/remux an RTSP stream in H264 format into a MPEG4 container, containing just the H264 video stream. Basically, webcam output into a MP4 container. I can get a poorly coded MP4 produced, using this code: // Variables here for demo AVFormatContext * video_file_output_format = nullptr; AVFormatContext * rtsp_format_context = nullptr; AVCodecContext * video_file_codec_context = nullptr; AVCodecContext * rtsp_vidstream_codec_context = nullptr; AVPacket packet = 0; AVStream * video_file_stream = (...)

6 October

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 17:07
  BGRA to YUV420 FFmpeg giving bad output - NewbieCoder Newest 'libx264' Questions - Stack Overflow
  My purpose is a screen recorder. I am using the Windows DXGI API to receive screenshots and I'm encoding the screenshots into a video using libx264. Feeding BGRA images directly to libx264 is producing weird colors in the output video. So, to get correct colors, I am trying to convert the BGRA to YUV420p. To speed up encoding, I am also trying to downscale the BGRA image. So I am getting an 1920x1080 BGRA image and I want to convert it to 1280x720 YUV420p. For this, I am using FFmpeg swscale library to do both the format conversion and downscaling. The problem is that the (...) -- https://imgur.com/a/EYimjrJ

5 October

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 15:35
  FFmpeg : Segment muxer does not work for AVC-MXF - Mitra M Newest 'libx264' Questions - Stack Overflow
  I'm trying to save input stream to separate files every 60 seconds with the following command: ffmpeg -i Input -vcodec libx264 -s 1920x1080 -pix_fmt yuv422p10le -aspect 16:9 -acodec pcm_s24le -ac 2 -ar 48000 -f segment -strftime 1 -segment_time 60 -y "e://o1/%H-%M-%S.mxf" but getting this errors: [mxf ⓐ 000002111453c640] h264 profile not supported0:00.62 bitrate=N/A speed=1.23x [mxf ⓐ 000002111453c640] could not get h264 profile av_interleaved_write_frame(): Operation not permitted Note: The following 3 commands work without any (...)

27 September

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 03:03
  very low latency streaminig with ffmpeg using a webcam - userDtrm Newest 'libx264' Questions - Stack Overflow
  I'm trying to configure ffmpeg to do a real-time video streaming using a webcam. The ffmpeg encoder command I use is as follows. ffmpeg -f v4l2 -input_format yuyv422 -s 640x480 -i /dev/video0 -c:v libx264 -profile:v baseline -trellis 0 -subq 1 -level 32 -preset superfast -tune zerolatency -me_method epzs -crf 30 -threads 0 -bufsize 1 -refs 4 -coder 0 -b_strategy 0 -bf 0 -sc_threshold 0 -x264-params vbv-maxrate=2000:slice-max-size=1500:keyint=30:min-keyint=10: -pix_fmt yuv420p -an -f mpegts udp://192.168.1.8:5001 The ffplay command used to display the video (...)

22 September

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 21:02
  ffmpeg - libx264 + slideshow produces smeared output [duplicate] - epilitimus Newest 'libx264' Questions - Stack Overflow
  I recently upgraded to ffmpeg version 4.3.1 with libx264. When I use it to generate a single image slideshow ffmpeg -y -loop 1 -i shapes.jpg -t 0:0:5 -vcodec libx264 output.mp4 I get a smeared image that looks like a technicolor waterfall (I know the -vcodec is redundant here).If I force use of the mpeg4 codec ffmpeg -y -loop 1 -i shapes.jpg -t 0:0:5 -vcodec mpeg4 output.mp4 everything works fine. I have tried several different input images but for example: https://cdn4.vectorstock.com/i/1000x1000/84/48/simple-geometric-shape-vector-13698448.jpg  (...) -- https://cdn4.vectorstock.com/i/1000x1000/84/48/simple-geometric-shape-vector-13698448.jpg, technicolor waterfall

14 September

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 05:55
  is it possible to compile x264 for webassembly using emscripten? - sunder kandasamy Newest 'libx264' Questions - Stack Overflow
  I am trying to build x264 code for webassembly. i use emconfigure to configure. like below emconfigure ./configure --prefix="$(pwd)/em" --enable-shared --enable-static --disable-cli --disable-gpl But this was throwing "No working C compiler found." error. i have gcc compiler 9.3.0 version and have tried reinstalling build-essentials and gcc but still same issue. config.log also doesn't help. If i provide --host cross compiler flag then it is generating libx264.so file, but i am not sure whether this is right as the wasm code should work in every browser in (...)

13 September

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 19:01
  FFMPEG creates incorrect Source duration - Byron Whitlock Newest 'libx264' Questions - Stack Overflow
  When transcoding movies from an AVI to mp4 sometimes FFMPEG sets the "Source Duration" incorrectly. This messes up playback on IOS devices. Specifically, it causes the video to cut out at "Source duration" while the audio still plays. FFMPEG output transcode doesn't' show anything odd at all. Looks normal, no errors or warnings. Can I force FFMPEG to never add the "Source Duration" metadata? How do I edit the track metadata shown by mediainfo? I tried Mp4box, and a few others, but I can't seem to figure out how to edit track (...) --

8 September

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 00:09
  how to make omxh264enc output filler data? - BlueWaterCrystal Newest 'libx264' Questions - Stack Overflow
  I require filler data from the encoder to artificially raise the bitrate to sustain constant bitrate. normally x264enc does this but omx264enc doesn't seem to. even though there seems be a value within its code PROP_FILLER_DATA

1 September

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 14:47
  x264 encoding severe quality loss - SolskGaer Newest 'libx264' Questions - Stack Overflow
  I used this repo to encode a mjpeg stream to a h264 one, but the output is not so good. The stream is a series of screenshot of an iPhone. In the output stream, even the lines between two items in the settings app are gone. How do I improve the output stream quality? Here is the code snippet that x264-go use to init an encoder func NewEncoder(w io.Writer, opts *Options) (e *Encoder, err error) e = &Encoder e.w = w e.pts = 0 e.opts = opts e.csp = x264c.CspI420 e.nals = make([]*x264c.Nal, 3) e.img = NewYCbCr(image.Rect(0, 0, (...) -- this,

23 August

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 16:40
  Playback of x264 encoded video in FLV is very slow (screen recording) - NewbieCoder Newest 'libx264' Questions - Stack Overflow
  Task: I am recording the screen in 30 FPS and saving it to an FLV file. Images of the screen are obtained using the DXGI API in Windows. These images are then encoded into a video using libx264. Then the video data is stored in FLV container. Issue/Problem: When the video is played in any video player, it is very slow. The frame rate information shows as 30 FPS but the playback feels like 15 FPS. Details: Pseudo-code for the whole software: FPS = 30 target_time_for_each_frame = 1/FPS; timestamp = 0; while (true) start_time = (...)

19 August

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 02:06
  OpenCV VideoWriter using ffmpeg with "Could not open codec 'libx264'" Error - user2262504 Newest 'libx264' Questions - Stack Overflow
  I am new to OpenCV, and I want write Mat images into video using VideoWriter on Ubuntu 12.04. But when constructing VideoWriter, errors came out. It seems that OpenCV invoke ffmpeg API using default parameters and ffmpeg invoke x264 using its default parameters. Then these setting is broken for libx264. Thus the "Could not open codec 'libx264'" error. Anyone has ideas to solve this problem? More specifically: anyone knows where and how OpenCV invoke ffmpeg API? how to change ffmpeg default settings using code, hopefull, can be (...)

10 August

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 20:01
  Decoder (codec h264) not found for input stream #0:1 [closed] - Harry Boy Newest 'libx264' Questions - Stack Overflow
  When I try to convert a file from one type to I get the error: Decoder (codec h264) not found for input stream #0:1 ffmpeg -i video.mp4 video_converted.mpg ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 10.2.0 (GCC) configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --enable-gpl --enable-version3 --enable-nonfree --disable-static --enable-shared --enable-avresample --enable-gmp --enable-ladspa --enable-libass --enable-libbluray --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libglslang (...)
• 13:56
  Install llibx264 on Opensuse - Harry Boy Newest 'libx264' Questions - Stack Overflow
  I need to install libx264 on OpenSuse Leap 15.1. I am following the steps here: https://software.opensuse.org/package/libx264?locale=nb Where I see that there is an option for OpenSuse Leap 15.1. and I click the 'Community packages' option. There are 3 options: Option 1: home:regataos I select 'Expert download' zypper addrepo https://download.opensuse.org/repositories/home:regataos/openSUSE_Leap_15.1/home:regataos.repo zypper refresh zypper install libx264 Loading repository data... Reading installed (...) -- https://software.opensuse.org/package/libx264?locale=nb

9 August

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 22:36
  FFMPEG (libx264) "height not divisible by 2" - Andy Hin Newest 'libx264' Questions - Stack Overflow
  I am trying to encode a .mp4 video from a set of frames using FFMPEG using the libx264 codec. This is the command I am running: /usr/local/bin/ffmpeg -r 24 -i frame_%05d.jpg -vcodec libx264 -y -an video.mp4 I sometimes get the following error: [libx264 ⓐ 0xa3b85a0] height not divisible by 2 (520x369) After searching around a bit it seems that the issue has something to do with the scaling algorithm and can be fixed by adding a -vf argument. However, in my case I don't want to do any scaling. Ideally, I want to keep (...)

4 August

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 22:55
  Does libx264 encoder support 12 bit pixel format such as yuv444p12le? - bazz01 Newest 'libx264' Questions - Stack Overflow
  Libx264 show support for following input pixel formats: yuv420p yuvj420p yuv422p yuvj422p yuv444p yuvj444p nv12 nv16 nv21 yuv420p10le yuv422p10le yuv444p10le nv20le gray gray10le For libx264 can support be added for 12 bit format like yuv444p12le? Any other open source encoder which supports 12 bit format?

3 August

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 19:17
  FFMPEG: Convert WebM VP8/VP9 multi-resolution video to MP4 (H.264) - thedeadalive Newest 'libx264' Questions - Stack Overflow
  I have been trying to convert a multi-resolution WebM video ( VP9/VP8/H.264 ) (1280 x 1080 till the half, thereafter 1080 x 1280) to MP4 container with H.264 encoding for video. When transcoded with FFMPEG is locking into the frame size it's encountering at the start of the video (1280 x 1080 in this case) when transcoded with libvpx (for VP8 and VP9) and libx264 (for H264). The only instance i could get it right was when the Input WebM was having H.264 video and opus Audio, and ffmpeg was instructed to just copy the video stream and trans-code the Audio to aac only.  (...) -- https://webrtc.github.io/samples/src/content/getusermedia/record/, https://groups.google.com/a/webmproject.org/forum/#!topic/webm-discuss/IgumDyMAHY0
• 16:39
  how to trim video in h264 format using ffmpeg while preserving quality? - prisonmike11 Newest 'libx264' Questions - Stack Overflow
  I'm new to ffmpeg, I'm trimming a small clip from a bluray H264 video by providing start and end duration. I tried: ffmpeg -ss 00:01:00 -i input.mp4 -to 00:02:00 -c copy output.mp4 but this results in stuttering issues in start of the video. The audio and video also don't match. I tried using -c libx264 but this is taking too long and the output video has much lower bit rate. My goal is to trim as fast as possible while preserving quality. I don't care about the frame accuracy of the trim. I plan on uploading the output to (...)

24 July

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 11:04
  muxing streamable segmented mp4 with libav - Elias Wagnerberger Newest 'libx264' Questions - Stack Overflow
  currently i have an application that is supposed to send fragmented mp4 data over a websocket to a client for it to be played there. i have a working implementation that pipes the raw frames to a spawned ffmpeg process and then reads fragmented mp4 segments from the output pipe before it sends those on to the client where the client then displays the video correctly. my problem is that when i try to make an implementation using libav it doesnt seem to work. my libav config uses libx264 to encode the frames before muxing them to a mp4, but when i try to play the provided segments (...)

20 July

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 17:57
  Problems with muxing fmp4 stream with libav - Elias Wagnerberger Newest 'libx264' Questions - Stack Overflow
  currently i have an application that is supposed to send fragmented mp4 data over a websocket to a client for it to be played there. i have a working implementation that pipes the raw frames to a spawned ffmpeg process and then reads fragmented mp4 segments from the output pipe before it sends those on to the client where the client then displays the video correctly. my problem is that when i try to make an implementation using libav it doesnt seem to work. my libav config uses libx264rgb to encode the frames before muxing them to a mp4, but when i try to play the provided (...)

15 July

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 14:35
  x264 output video is blank when threading is enabled - NewbieCoder Newest 'libx264' Questions - Stack Overflow
  I am using libx264 compiled from source. It was configured to get both .dll and .lib by this command ./configure --disable-cli --enable-shared --extra-ldflags=-Wl,--output-def=libx264.def` I am using the libx264 API in my screen-sharing program with the preset - "veryfast", tune - "zerolatency", profile - "high" and also the following settings. param.i_csp = X264_CSP_BGRA; param.i_threads = 1; param.i_width = width; param.i_height = height; param.i_fps_num = fps; param.i_fps_den = 1; param.rc.i_bitrate = bitrate; param.rc.i_rc_method = (...) -- https://imgur.com/a/l8LCd1l, https://imgur.com/a/VdyX1Zm, https://gofile.io/d/w2kX56

6 July

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 12:56
  FFmpeg - generate x264 CBR video transport stream with C-API - ZeroDefect Newest 'libx264' Questions - Stack Overflow
  Using various posts sprinkled around the Internet, including this one here on SO, I've been able to understand how to use the FFmpeg cli to generate a CBR video bitrate using the x264 codec (wrapped in an MPEG-2 transport stream). Note: I'm concerned with the video bitrate - nothing else. ffmpeg -i cbr_test_file_input.mp4 -c:v libx264 -pix_fmt yuv420p -b:v 6000000 -preset fast -tune film -g 25 -x264-params vbv-maxrate=6000:vbv-bufsize=6000:force-cfr=1:nal-hrd=cbr -flags +ildct+ilme x264_cbr_test_output.ts However, I'm trying to approach this from an (...) -- , , git repo

30 June

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 15:57
  webm to mp4 conversion using ffmpeg - Pavan K Newest 'libx264' Questions - Stack Overflow
  When I try to convert a webm file to mp4 the output is very very choppy and it appears as if many frames have been dropped by ffmpeg I used the following commands to convert ffmpeg -i movie.webm movie.mp4 ffmpeg -i movie.webm -vcodec libx264 movie.mp4 ffmpeg -i movie.webm -vcodec libx264 -qscale 0 movie.mp4 All of them have the same problem. When I use ffprobe it seems to show the frames more or less properly. UPDATE: built on Jun 14 2013 14:31:50 with gcc 4.7 (Ubuntu/Linaro 4.7.2-2ubuntu1) configuration: (...)

15 June

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 21:06
  FFmpeg licence requirements when not distributing [closed] - Dodu Newest 'libx264' Questions - Stack Overflow
  I am making a website that uses FFmpeg, and by extension libx264. The website takes a video and adds filters etc to it, then serves that new video to the user. There are various answers about distributing libx264 (and others) as part of a commercial product such as: Can I use FFmpeg in a commercial product? Since I am generating content using the library, but not distributing the library itself, I'm not sure where this leaves me. Do I need a license to libraries? Or because there is no distribution, are licenses generally not needed?  (...)

14 June

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 20:22
  FFMPEG licencing - Dodu Newest 'libx264' Questions - Stack Overflow
  I am making a website that uses FFMPEG, and by extention libx264. The website takes a video and adds filters etc to it, then serves that new video to the user. There are various answers about distributing libx264 (and others) as part of a comercial product such as: https://video.stackexchange.com/questions/14802/can-i-use-ffmpeg-in-a-commercial-product/14804#:~:text=Yes%2C%20you%20can%20use%20FFmpeg,LGPL)%20version%202.1%20or%20later.&text=So%2C%20yes%2C%20you%20can%20definitely,usage%2C%20distribution%2C%20and%20modification. Since I am generating (...)

4 June

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 12:20
  Compiling ijkplayer x264 for android x86 & x86_64 Architecture , error: unknown type name 'v4si' - Lins Louis Newest 'libx264' Questions - Stack Overflow
  I'm trying to build this project https://github.com/simplepeng/ijkplayer-x264 but building x264 failing for x86 and x86_64 architectures . Link of the issue : https://github.com/simplepeng/ijkplayer-x264/issues/1 -- https://github.com/simplepeng/ijkplayer-x264, https://github.com/simplepeng/ijkplayer-x264/issues/1

29 May

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 21:53
  Compiling static libs of ffmpeg with x264 in Msys2 for Visual Studio, but libx264 is never found - Blake Senftner Newest 'libx264' Questions - Stack Overflow
  Having previously downloaded and compiled ffmpeg 4.2.2 to static libraries using MSYS2 and the Visual Studio 2015 x64 tool chain. I want to add the x264 codec from VLC/VideoLan, compiling that to a static library as well. However, running Configure for ffmpeg produces an error saying "libx264 not found." I built ffmpeg without VideoLAN's x264 at "/c/ThirdParty/opt/ffmpeg-4.2.2" with "make install" installing to "/c/ThirdParty/opt/ffmpeg-4.2.2/ffmpeg_build" . I am using the following steps to compile from source x264 and add it to the ffmpeg build using the same (...) -- http://git.videolan.org/git/x264.git
• 00:09
  What is this "fixing the build scripts" for compiling x264? - Blake Senftner Newest 'libx264' Questions - Stack Overflow
  I am trying to compile an all static build of source-customized ffmpeg libraries with the additional codecs from VideoLAN, such as their x264 codec. I am ultimately building for use in Windows with Visual Studio 2015 C++, so I am comparing a few compiling guides for my instructions. In the guide linked below (I located via Google searches) shows how to compile x264 with the VS2015 toolchain in MSYS2 without any special steps: https://gist.github.com/RangelReale/3e6392289d8ba1a52b6e70cdd7e10282 While in this other guide, offered by the compiling guide (...) -- https://gist.github.com/RangelReale/3e6392289d8ba1a52b6e70cdd7e10282, https://www.roxlu.com/2019/062/compiling-ffmpeg-with-x264-on-windows-10-using-msvc, http://git.videolan.org/git/x264.git

6 May

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 05:22
  FFMPEG on cygwin failed to compile libx264 error: unknown type name ‘HMODULE’ - Ivan Lee Newest 'libx264' Questions - Stack Overflow
  I am trying to compile libx264 in ffmpeg under cygwin environment. I have followed some directions from several sources from Koohiimaster's blog, FFMPEG compilation guide, SO post 1, SO post 2 but I always stuck at the same step which is the libx264 compilation (make) process. As mentioned in the FFMPEG compilation guide these steps should be followed in order to make libx264 works cd ~/ffmpeg_sources wget http://download.videolan.org/pub/x264/snapshots/last_x264.tar.bz2 tar xjvf last_x264.tar.bz2 cd x264-snapshot* PATH="$HOME/bin:$PATH" (...) -- Koohiimaster's blog, FFMPEG compilation guide

5 May

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 03:07
  Matching a specific media format with ffmpeg/avconv - Markus A. Newest 'libx264' Questions - Stack Overflow
  I need to encode a video from static images in such a way that it format-matches another one so I can splice the video streams together. Here is the mediainfo of the file I'm trying to match: Video Format : AVC Format/Info : Advanced Video Codec Format profile : BaselineⓐL3.1 Format settings, CABAC : No Format settings, ReFrames : 1 frame Codec ID : 7 Duration : 2mn 46s Bit rate : 1 614 Kbps Width : 1 280 pixels Height : 720 pixels Display aspect ratio : 16:9 Frame rate mode : Variable Standard : NTSC Color (...)

4 May

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 23:08
  How to get FFMPEG to encode H264 using libx264? - Basit Anwer Newest 'libx264' Questions - Stack Overflow
  FFMPEG encode example fails to create a H264 video. MPEG1 works fine though. Pasting the code here as well * ⓐfile * video encoding with libavcodec API example * * ⓐexample encode_video.c */ #include #include #include #include #include #include static void encode(AVCodecContext *enc_ctx, AVFrame *frame, AVPacket *pkt, FILE *outfile) int ret; /* send the frame to the encoder */ if (frame) printf("Send frame %3"PRId64"\\n", frame->pts); ret = avcodec_send_frame(enc_ctx, (...) -- FFMPEG encode example
• 01:50
  Unable to encode H264 video using FFMPEG example - Basit Anwer Newest 'libx264' Questions - Stack Overflow
  FFMPEG encode example fails to create a H264 video. MPEG1 works fine though. Pasting the code here as well * ⓐfile * video encoding with libavcodec API example * * ⓐexample encode_video.c */ #include #include #include #include #include #include static void encode(AVCodecContext *enc_ctx, AVFrame *frame, AVPacket *pkt, FILE *outfile) int ret; /* send the frame to the encoder */ if (frame) printf("Send frame %3"PRId64"\\n", frame->pts); ret = avcodec_send_frame(enc_ctx, (...) -- FFMPEG encode example

29 April

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 22:07
  ffmpeg libx264 encoder different machines different output - yfu Newest 'libx264' Questions - Stack Overflow
  I'm new to development with ffmpeg and I was wondering if it is possible to get the same bit exact output by running ffmpeg with the libx264 encoder on different machines (compiled using different compilers) with the same input file and same configuration options? If it is possible, are there additional configuration options that need to be set when compiling libx264/ffmpeg? If it is not possible, why? Below is the output from my running two versions off ffmpeg with libx264 that yield different MD5 hashes of the outputs. ffmpeg installed via homebrew on (...) -- https://github.com/jrottenberg/ffmpeg/blob/master/docker-images/3.4/alpine/Dockerfile

15 April

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 16:45
  FFMPEG - Width/ Height Not Divisible by 2 (Scaling to Generate MBR Output) - Sanjeev Pandey Newest 'libx264' Questions - Stack Overflow
  I am trying to generate multilple variants of videos in my library (Mp4 formats) and have renditions planned ranging from 1080p to 240p and popular sizes in between. For that I am taking a video with a AxB resolution and then running through a code (on bash) which scales them to desired following sizes - 426x240 640x360 842x480 1280x720 1920x1080, with different bitrates of course, and then saves as Mp4 again. Now, this works just fine if source video has height and width divisible by 2, but code breaks on the following line for the videos with odd width and (...)

5 April

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 21:58
  How would I send x264 encoded frames correctly over a network using UDP? - Eoin McBennett Newest 'libx264' Questions - Stack Overflow
  I'm trying to send the encoded h264 frames I have over a network as I get them, currently I'm only streaming the nal units I get from each frame as it is encoded, is this the correct approach? I wrote a receiver application on a different computer to get the nals and wrote them all to a file sequentially, when played with vlc I didn't get any video and instead just got a screeching noise. I'm not sure exactly where the problem would lie here. I have included the result of the FFmpeg -I command on the file created. Encoder and sender (...) -- FFMPEG -I output

4 April

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 07:11
  How can i build x264 and fdk-aac for android with ndk? - Pradeep Simba Newest 'libx264' Questions - Stack Overflow
  How can i build x264 and fdk-aac for android with ndk? I build x264 and fdk-aac with ndk. But, it not done. I modified this build file and I build x264 and fdk-aac.But,it not done. How can I solve this? -- file

21 March

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 05:00
  How to fix grainy recoding with ffmpeg mp4 x264? - teenserie Newest 'libx264' Questions - Stack Overflow
  I recorded the audio and video stream from a streaming with ffmpeg. when I go to re-encode the file using libx264, the video in the movements looks bad and grainy as in the image. Where did I go wrong? this is the code I used ffmpeg -i input.mp4 -c:v libx264 -c:a aac output.mp4 and these are mediainfo of original file Metadata: major_brand : isom minor_version : 1 compatible_brands: isom creation_time : 2020-03-19T22:43:32.000000Z Duration: 00:39:51.99, start: 0.000000, bitrate: 1300 kb/s Stream (...) --

8 March

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• 01:33
  How to benchmark x264 in ARM9 environment - curious_beast Newest 'libx264' Questions - Stack Overflow
  1.How to benchmark x264 video encoder in Dual-core ARM Cortex™-A9?. 2.How to calculate the encoding speed with respect to the CPU clock frequency?.

6 March

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 07:54
  what's that before first IDR in 264 (not sps pps) - DJI_lover Newest 'libx264' Questions - Stack Overflow
  I used ffmpeg and libx264 to encode my video,when I print the AVPacket data,I found there is something only exist before the first IDR.Could someone tell me what's that,thanks. 0 0 1 6 5 ff ff 73 dc 45 e9 bd e6 d9 48 b7 96 2c d8 20 d9 23 ee ef 78 32 36 34 20 2d 20 63 6f 72 65 20 31 34 38 20 72 32 36 34 33 20 35 63 36 35 37 30 34 20 2d 20 48 2e 32 36 34 2f 4d 50 45 47 2d 34 20 41 56 43 20 63 6f 64 65 63 20 2d 20 43 6f 70 79 6c 65 66 74 20 32 30 30 33 2d 32 30 31 35 20 2d 20 68 74 74 70 3a 2f 2f 77 77 77 2e 76 69 64 65 6f 6c 61 6e 2e 6f 72 67 2f 78 32 36 34 2e 68 74 6d 6c 20 (...)

1 February

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• 08:59
  Ffmpeg libx264rgb and libx264 yuv444p gives very different results - Mustafa Akın Yılmaz Newest 'libx264' Questions - Stack Overflow
  I am trying to create a lossy compressed video from several .png files. I am using the following ffmpeg commdans: ffmpeg -i %8d.png -frames:v 4 -c:v libx264rgb -pix_fmt rgb24 -g 4 -qp 30 -r 25 out.mp4 and ffmpeg -i %8d.png -frames:v 4 -c:v libx264 -pix_fmt yuv444p -g 4 -qp 30 -r 25 out.mp4 Then I am extracting frames from the videos with the command: ffmpeg -i out.mp4 -r 25 %8d.png When I compare the bitrate and PSNR, I found that the yuv444p gives about 2 db gain at the same bitrate. Why such a huge difference is (...)

31 January

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 08:45
  ffmpeg - How to configure ref param for h264_nvenc encoder - ItamarP Newest 'libx264' Questions - Stack Overflow
  I'm trying to configure and replace libx264 encoder with h264_nvenc NVIDIA encoder. I want to replace the parameter -x264-params ref=4 with it's parallel nvenc parameter. I used ffmpeg -hide_banner -h encoder=h264_nvenc to see all available options but couldn't find any proper replacement. Any advice?

30 January

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 20:27
  Unable to use FFMPEG to transcode video - Mathew Paret Newest 'libx264' Questions - Stack Overflow
  I am getting the below error while transcoding videos automatically using nzbtomedia (https://github.com/clinton-hall/nzbToMedia/). Transcoder returned:b"Unknown encoder 'libx264'\\n" has failed How do I install this encoder? Raspbain (Raspberry PI) Additional Info: FFMPEG Version ffmpeg version N-96192-g2ff687c17f Copyright (c) 2000-2019 the FFmpeg developers built with gcc 8 (Raspbian 8.3.0-6+rpi1) configuration: libavutil 56. 38.100 / 56. 38.100 libavcodec 58. 65.100 / 58. 65.100 libavformat (...) -- https://github.com/clinton-hall/nzbToMedia/

29 January

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 19:05
  FFMPEG: Stream in Stream aka Picture in Picture - F O X Newest 'libx264' Questions - Stack Overflow
  Any chance that i could make picture in picture with ffmpeg (ubuntu)? My single stream is working with this command very well: ffmpeg -f lavfi -i anullsrc -rtsp_transport tcp -i rtsp://.......... -b:v 800k -maxrate 900k -bufsize 600k -vcodec copy -crf 35 -preset veryfast -pix_fmt + -c:a aac -f flv rtmp://a.rtmp.youtube.com/live2/........ Tried several ideas but all of them are using libx264 instead of just -vcodec copy and i don't know why but with libx264 my bitrate stream and fps are terrible low. So is there any way to just copy both streams and scale one of them to lowerleft (...) -- photo here

24 January

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 14:45
  Recording with libx264 results in audio muting prior to recording being stopped depending on preset - Pyon Newest 'libx264' Questions - Stack Overflow
  ffmpeg -thread_queue_size 512 -f dshow -i audio="AudioDevice" -thread_queue_size 512 -f gdigrab -rtbufsize 100000000 -hwaccel auto -framerate 60 -offset_x 332 -offset_y 720 -video_size 340x162 -probesize 10000000 -i desktop -c:v libx264 -preset veryslow -crf 23 -pix_fmt yuv420p "output.mp4" I'm using the above command to record desktop video/audio in a defined region. The video is being recorded using gdigrab while the audio is being recorded using dshow with a custom loopback driver. When the libx264 preset is set to anything below "ultrafast" like "veryslow", the audio will be muted (...)

8 January

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 04:06
  How to deal ffplay being too slow playing iPhone's videos? - Mikhail T. Newest 'libx264' Questions - Stack Overflow
  Trying to play a 3840x2160 video recorded by an iPhone 7 (ⓐ30fps), I get frequent pauses -- in the video, music keeps playing. This happens both in firefox and when ffplay is invoked to play the file directly -- from command-line. The CPU is a dual E6700 ⓐ3.20GHz -- not super fast, but it should be able to play smoothly, shouldn't it? Video is Intel's "series 4" integrated chipset -- again, not a speed-daemon, but it should be adequate... Support for Intel's VA API is included. I build ffmpeg-4.1 from source using FreeBSD port. As you can see, the port (...) -- FreeBSD port

6 January

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 20:01
  libavcodec/libx264 isn't respecting keyint_min - seanr8 Newest 'libx264' Questions - Stack Overflow
  Using libavcodec 57.107.100, I have some code to encode frames into H.264 and I'm working on tweaking the settings to prep resulting videos to be streamed with DASH, which requires consistent keyframe timings. So I'm setting the GOP to 4x the framerate and setting the keyint_min to the same as the GOP so that I can guarantee that the keyframe interval lines up with the 4 second segment boundaries. I'm using the following code to build the AVCodec and AVCodecContext: AVCodec* codec = NULL; codec = (...)

5 January

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 11:54
  what is the lowest allowed framerate of VP9 codec - d3im Newest 'libx264' Questions - Stack Overflow
  I was searching over Net to find what is the lowest allowed framerate of VP9 but didn't find anything. I'm asking because I successfully encoded video at 0.25 or 1 FPS to x264 or x265, but with VP9 it gives me an error on that framerates.

3 January

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 00:47
  Remove extra SPS and PPS from h264 stream - izambl Newest 'libx264' Questions - Stack Overflow
  I have some screen recordings taken with Chrome MediaStream, but Mac Chrome 79 introduced a bug (https://bugs.chromium.org/p/chromium/issues/detail?id=1034633) that breaks some of the videos because of the way SPS and PPS are handled. I found out that if I reencode the video with ffmpeg -i video.mp4 -c:v libx264 video1.mp4 it works but it takes too long to process, so I was thinking on converting the stream to AVCC or maybe another way of removing any extra SPS and PPS data so chrome won't use SPS and PPS from IDR slice headers. I tried using FFmpeg Bitstream Filters but I couldn't get (...) -- https://bugs.chromium.org/p/chromium/issues/detail?id=1034633

15 December

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 02:58
  ffmpeg x264 CPU core scaling - alex416 Newest 'libx264' Questions - Stack Overflow
  Does anyone have any experence with this type of thing? Currently using a Ryzen 7 8c/16T CPU, and using a program called BES. Using 10% CPU, is almost no slower at transcoding from mkv to mp4 (both x264, i know i can just copy them) than using 100% cpu on all 16 threads. So, Since this is the case, What is the ideal core count for libx264? I mean, Does the same type of thing happen with 32 threads? Or 8 threads, etc. -- BES

12 December

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 15:42
  Force x264 to encode all frames relative to the first (IDR) frame - cloudraven Newest 'libx264' Questions - Stack Overflow
  I want to generate a h.264 stream in which P-frames are using references exclusively using a long-term reference to the first frame (an IDR frame). This would also require the first frame to be an IDR frame. This is an academic experiment to understand the encoding behavior of long-term references and the consequences of forcing frames to refer to a specific (single) frame rather than several. It would be great if I could do this from the command line, but if not possible I am open to modifying x264 for this purpose. Could anyone point me to where in the (...)
• 08:39
  Force x264 to only use long term reference frames - cloudraven Newest 'libx264' Questions - Stack Overflow
  I want to generate a h.264 stream in which P-frames are using references exclusively using long-term references identifiers rather than defaulting to a short-term reference given by the previous frame. At this point this is an academic experiment to understand the encoding behavior of long-term references and the consequences of forcing frames to refer to a specific frame rather than several. It would be great if I could do this from the command line, but if not possible I am open to modifying x264 for this purpose. Could anyone point me to where in the source code it is determined: (...)