28 mars

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

• 05:10
  Incorrect length of video produced with ffmpeg libraries [closed] - ivan.ukr Newest 'x264' Questions - Stack Overflow
  I'm writing a C program that takes series of PNG images and converts them into a video. Video consists of the initial black screen and then each of those images, shown for the same constant amount of time, say 200 ms. I'm using libx264 as codec and mp4 as output format. I'm compiling my program with GCC 12 on Ubuntu 22.04 LTS. I'm using ffmpeg version from Ubuntu repositories. In order to achieve above behavior I've set time base to 1/5 in the both stream and codec. // assume imageDuration = 200 AVRational timeBase; av_reduce(&timeBase.num, (...)

27 mars

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

• 22:30
  How to initialize video decoder with a already decoded frame? - Ragdoll Car Newest 'x264' Questions - Stack Overflow
  Let's say I have an FFmpeg video decoder x264 initially initialized with some parameters. I am using C++ in my scenario. In normal conditions we push an encoded I-frame into such decoder and then referencing encoded P-frames. I have a special case where my I-frame is already decoded. So in my case I want to: push already decoded I-frame into my decoder push referencing encoded P-frames into my decoder How can I initialize the decoder state with already decoded I-frame? Currently to bypass these limitations I have to: create a new (...)

10 mars

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

• 14:29
  FFMPEG compile with x264 support for Android - Pecana Newest 'x264' Questions - Stack Overflow
  I am trying to build ffmpeg extensions for media3 (ExoPlayer) for Android https://github.com/androidx/media/tree/release/libraries/decoder_ffmpeg Using the default settings everything is fine but if I try to add support to libx264 the build failed. I compiled x264 for Android locally and it worked so the .so file for arm64 is present, I added it to the pkg-config with : export PKG_CONFIG_PATH=/build/x264/arm64/lib/pkgconfig:$PKG_CONFIG_PATH but when I try to build ffmpeg with the following command it fails : ./configure \\ --prefix=/build/ffmpeg (...) -- https://github.com/androidx/media/tree/release/libraries/decoder_ffmpeg

22 janvier

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

• 21:04
  avcodec_find_encoder(AV_CODEC_ID_H264) returns null - Monjura Rumi Newest 'x264' Questions - Stack Overflow
  I am building an android application which will encode image captured from camera preview and later decode it. I am using ffmpeg library to encode and decode. To build static library with x264 I have used this tutorial. http://dl.dropbox.com/u/22605641/ffmpeg_android/main.html. As a source code of ffmpeg if I use the one downloaded from the link given in tutorial I can built it but can't build library if i use source code downloaded from here git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg. I have built library in ubuntu and using it in windows 7 in Eclipse. As I need only h264 (...)

12 janvier

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

• 12:42
  encode x264(libx264) raw yuv frame data - Mohamed El-Sayed Newest 'x264' 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 (...)
• 12:48
  Why pkg-config overrides 'prefix' with another default one? - SteveH Newest 'x264' Questions - Stack Overflow
  I have an issue in using pkg-config to link some libraries to a program. The problem is 'prefix' variable in each library pkg-config files (*.pc) are overridden with an unwanted directory leading to building the program could not find the library's header and lib files. Here, one of '*.pc' files, x264.pc: prefix=/e/x264/x64-windows-rel exec_prefix=$prefix libdir=$exec_prefix/lib includedir=$prefix/include ... I run this from MSYS2 terminal: pkg-config --cflags --debug x264 This is some (...)
• 12:52
  libx264: which parameters can be changed on fly? - Dan Tumaykin Newest 'x264' 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
• 12:56
  Per macroblock encoding in libx264 - Wei.M Newest 'x264' 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?

9 janvier

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

• 05:11
  Create a deep copy of internal x264 encoder's state - Ragdoll Car Newest 'x264' 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

4 novembre

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

• 21:11
  is it possible to compile x264 for webassembly using emscripten? - sunder kandasamy Newest 'x264' 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 (...)

26 octobre

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

• 04:13
  h264 RTP timestamp - user269090 Newest 'x264' Questions - Stack Overflow
  I have a confusion about the timestamp of h264 RTP packet. I know the wall clock rate of video is 90KHz which I defined in the SIP SDP. The frame rate of my encoder is not exactly 30 FPS, it is variable. It varies from 15 FPS to 30 FPS on the fly. So, I cannot use any fixed timestamp. Could any one tell me the timestamp of the following encoded packet. After 0 milisecond encoded RTP timestamp = 0 (Let the starting timestamp 0) After 50 milisecond encoded RTP timestamp = ? After 40 milisecond encoded RTP timestamp = ? After 33 milisecond encoded RTP (...)

18 août

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

• 10:00
  x264/x265 options for fast decoding while preserving quality - user3301993 Newest 'x264' 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

26 mai

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

• 05:48
  How to check 'Output bit depth' of the libx264 library in ffmpeg? - Greg Newest 'x264' 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

24 mai

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

• 13:45
  I use ffmpeg to encode and create MPEG file from a source MP4 file. In Mac the encoding is good but in windows it creates random green pixels [closed] - Amudhan R Newest 'x264' Questions - Stack Overflow
  I use ffmpeg 3.4.2 version to encode and create an MPEG-TS file using H.264 encoding. In both Windows and Mac the ffmpeg creates the video without any error. But the resultant video from windows having a green pixels on certain frames. No idea why this is happening. Below is the encoding command: ffmpeg -i VIDEO_SOURCE.mp4 -vf scale=720:480 -c:v libx264 -b:v 2M -minrate 2M -maxrate 2M -bufsize 2M -level:v 40 -profile:v main -bf:v 2 -r 30 -crf 22 -x264-params 'keyint=3:min-keyint=3:ref=2:8x8dct=0:weightp=1:subme=6:rc-lookahead=30' -c:a aac -b:a 130k -ar 48000 -f mpegts (...)

25 avril

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

• 22:49
  Is it still possible to compile modern x264 with the nal long start code used prior to release r1510? - Bryan Knowles Newest 'x264' Questions - Stack Overflow
  I'm currently nerding out on old technology with HD-DVDs. The only freely available muxer is hddvdmux, I'm using MultiAVCHD for this. Beginning with r1510, x264 switched to short start packets for NAL HRD (from what I understand). This makes the stream incompatible with hddvdmux. deank on doom9 patched hddvdmux to accept short start codes, but in doing so, the video file plays too quickly and the audio goes out of sync. The results I'm getting from the 2009 release of x264 leave much to be desired in comparison to modern releases, and I'd like to get those (...)

8 avril

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

• 22:04
  What are the licence free codecs for FFMPEG? - FunkyPizza Newest 'x264' Questions - Stack Overflow
  So I've recently started implementing ffmpeg in an application that I do intend to distribute commercially. And I've had an hard time getting my head around the whole licensing process. The most commonly answered question I've seen seems to be about x264 which requires a paid licence from x264.org in order to use it commercially (right?). I started to look into mpeg4 instead but that too seemed to be locked behind some patent licensing fee (https://www.mpegla.com/programs/mpeg-4-visual/license-agreement/). I guess my question is the following, what (...) -- https://www.mpegla.com/programs/mpeg-4-visual/license-agreement/