12 janvier

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

• 12:56
  Per macroblock encoding in libx264 - Wei.M Newest 'libx264' Questions - Stack Overflow
  I know that in x264 encoding, the process is going on with the unit of macroblock. However, is that possible to set the parameters for each macroblocks? For example, if I want to let the QP of some specific area to be smaller than others. Is that possible? If I need to modify the functions and Apis in libx264, where should I begin?
• 12:52
  libx264: which parameters can be changed on fly? - Dan Tumaykin Newest 'libx264' Questions - Stack Overflow
  I know that it is possible to change some encoder parameters on fly, using x264_encoder_reconfig(). From this commit I can deduce that we can change ratecontrol parameters - but I was unable to find a clear list of parameters that may be changed. Question: which parameters of x264 encoder can be changed on fly? -- this
• 12:42
  encode x264(libx264) raw yuv frame data - Mohamed El-Sayed Newest 'libx264' Questions - Stack Overflow
  I am trying to encode an MP4 video using raw YUV frames data, but I am not sure how can I fill the plane data (preferably without using other libraries like ffmpeg) The frame data is already encoded in I420, and does not need conversion. Here is what I am trying to do: const char *frameData = /* Raw frame data */; x264_t *encoder = x264_encoder_open(&param); x264_picture_t imgInput, imgOutput; x264_picture_alloc(&imgInput, X264_CSP_I420, width, height); // how can I fill the struct data of imgInput x264_nal_t (...)

9 janvier

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

• 05:11
  Create a deep copy of internal x264 encoder's state - Ragdoll Car Newest 'libx264' Questions - Stack Overflow
  I am using x264 library: https://github.com/mirror/x264 We can create a new encoder handler this way: x264_param_t param; // fill with proper values x264_t* handler = x264_encoder_open(&param); But how can we create a deep copy of handler so we can have two the same encoders with exactly the same internal state? -- https://github.com/mirror/x264

17 décembre

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

• 22:00
  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 (...)

5 décembre

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

• 01:06
  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 (...)

4 novembre

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

• 21:11
  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 (...)

29 octobre

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

• 23:37
  How to set correct parameters for x264 lib - galuk Newest 'libx264' Questions - Stack Overflow
  I depacketize the H264 video fragments from an IP.RTP stream and save them to video.ivf file. After depacketizing i have only [SPS] ,[PPS] and [non-IDR slice]. I try to create IDR slice by using x264 lib. x264 lib creates IDR frame which consists of 0x000001[SPS nal type 7] 0x000001[PPS nal type 8] 0x0001[SE slice nal type 6] and 0x0001[I slice nal type 5]. How to set correct parameters for x264 lib if i have real SPS and PPS frames to get the same SPS and PPS frames i parse SPS and PPS but i don't know which parameters of x264_param_t param i should set. can someone give me (...)

1er octobre

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

• 15:10
  Adding x264 and AAC encoding to a Telegram-based FFmpeg script - Pooria Darvishi Newest 'libx264' Questions - Stack Overflow
  I'm trying to modify a Telegram script that utilizes static FFmpeg and VPX libraries to also include x264 and AAC encoding. I'm quite new to this and could use some guidance. Background: Telegram uses static .a files of FFmpeg and VPX, compiled using NDK. I have the script that builds these libraries. I want to modify this script to include x264 and AAC libraries as well. Problem: I'm unsure how to integrate x264 and AAC into the existing build process and how to configure FFmpeg to use these codecs. Code snippets:  (...)

18 août

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

• 10:00
  x264/x265 options for fast decoding while preserving quality - user3301993 Newest 'libx264' Questions - Stack Overflow
  I want to encode some videos in H264 and H265, and I would like to ask for help in order to chose the adequate options in x264/x265. My first priority is video quality. Lossless would be the best quality for example My second priority is fast decoding speed (ie: I would like faster decoding without sacrificing quality) fast decoding for me means that the decoding machine would use less CPU resources reading the resulting video Less RAM consumption would be a plus Latency is not important I don't care that much if the output file ends up (...) -- x265 doc

19 juin

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

• 15:36
  Previewing mp4 video of cv2s VideoWriter not possible - user22614632 Newest 'libx264' Questions - Stack Overflow
  I am writing a machine learning football analysis system, and I want to store the result video as seen in the code block. I can see the video normally under Windows' media player, but in VSCode and Streamlit, I can't open/show the video. Edit: On Mac, it works perfectly well. def save_video(frames: List[np.ndarray], path: str, fps: int=24) -> None: fourcc = cv2.VideoWriter_fourcc(*"avc1") # codec for compressing the video out = cv2.VideoWriter(filename=path, fourcc=fourcc, fps=fps, frameSize=(frames[0].shape[1], frames[0].shape[0])) for frame in (...)

26 mai

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

• 05:48
  How to check 'Output bit depth' of the libx264 library in ffmpeg? - Greg Newest 'libx264' Questions - Stack Overflow
  According to the x264 Encoding Guide, the crf scale depends on whether x264 is 8-bit or 10-bit. Supposedly x264 --help shows the Output bit depth. But on Windows ffmpeg -h full doesn't say anything about Output bit depth and the crf scale option is described as from -1 to FLT_MAX. How can I check if my ffmpeg is using 8-bit or 10-bit version of the libx264 library? -- x264 Encoding Guide

21 mars

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

• 08:06
  How to transcode short video using FFmpeg, libx264 codec, Swift, iOS app - Dmitriy iOS Newest 'libx264' Questions - Stack Overflow
  The goal is to transcode a short video into .mov format using FFmpeg and libx264 codec. So far I have not been able to do this using third-party libraries. Using the command line, the video is perfectly transcoded, but I need it inside the application. If anyone has a solution I would be very grateful. The resulting video needs to have the following parameters, something like this: Picture 1 Picture 2 Picture 3 For example: let command = ["ffmpeg", "-i", videoOutputURL.path, "-c:v", "libx264", "-c:a", "copy", convertedVideoUrl.path] let ffmpegCommand = (...) -- FFmpeg, Picture 1, Picture 2, Picture 3

6 mars

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

• 23:24
  ffmpeg Connection to tcp://127.0.0.1:1935 refused on Windows 10 - Wissam Elias Newest 'libx264' Questions - Stack Overflow
  I am trying to re-stream an RTSP connection on the local network using this command: ffmpeg -loglevel debug -rtsp_transport tcp -i rtsp://192.168.1.13:1935 -codec copy -f rtsp rtsp://172.0.0.1:1935/live/stream but i am getting an error message: [tcp ⓐ 0000020c99c4c1c0] Connection to tcp://127.0.0.1:1935 failed: Connection refused rtsp://127.0.0.1:1935/live/stream: Connection refused while the port is not used and I've tried to use 8554 also with the same result, and the firewall on my device is turned (...)

23 février

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

• 09:42
  Error Linking FFmpeg with libx264: Undefined Reference to __imp_x264_encoder_open_163 - zeyu Newest 'libx264' Questions - Stack Overflow
  I'm attempting to compile FFmpeg with libx264 support on Windows using MinGW-w64, but I'm encountering a linking error when building . The error points to an undefined reference to in . Here are the details of the error message:libavcodec/avcodec-57.dll__imp_x264_encoder_open_163libx264.o In fact, I want to run the AccMPEG branch from https://github.com/Alex-q-z/myh264.git, and I am looking to obtain an executable (exe) to run on Windows. LD libavcodec/avcodec-57.dll E:/MSY/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: (...) -- https://github.com/Alex-q-z/myh264.git