Newest 'x264' Questions - Stack Overflow

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• x264vfw - H.264/MPEG-4 AVC codec is advisable to use ?

  25 avril 2012, par Dhaval Kariya

  I have generated graph using GraphEdit utility of Directshow.

  My Graph is as follow

  osprey card -> x264vfw - H.264/MPEG-4 AVC codec -> GDCL Multiplexer -> File writer (.mp4

  file)

  I use "x264vfw - H.264/MPEG-4 AVC codec" downloaded from

  http://sourceforge.net/projects/x264vfw/. I want to know is this advisable to use this

  coded to encode the live video stream? And what about the support and

  licensing for the same?

  Thank You.

• Does 'keyint infinite' improve overall compression with crf and mb-tree ?

  23 avril 2012, par HitomiTenshi

  After reading what intra-refresh does, I kinda got confused. I'm encoding for YouTube and YouTube will re-encode the video-file anyways, so I thought "why not removing all these heavy IDR-frames?" I just want to compress my video as hard as possible, enabling everything that could help me getting a lower filesize, but still maintaining a high quality.

  I used to test around stuff with lossless QP encoding, but the only thing I could max out was the merange. Here is a paste of my x264 settings: Pastebin.

  I want to achieve highest compression while maintaining visually lossless quality. (using crf values around 10 - 13, and merange 32)

  Could anyone give me advice on how to compress my video super hard (without touching the crf value!). I also want to know if it's true, that keyint infinite reduces overall compression.

• Given an x264 stream and an ogg vorbis stream, how do I make a muxed stream that mplayer/VLC can read ?

  14 avril 2012, par dascandy

  I'm confused and a bit stuck with this question. All I can find on Google is basic usage of transcoding software, which is not related to the question.

  I'm making a game and I'd like to include native capture ability to stream video. I would much like to stream this to a standard-ish client, such as VLC. It needs to be both in a format it recognizes and it needs to be multiplexed in order for this to work.

  My question therefore is, I know how to encode stuff from raw video frames to x264 (see also How to encode series of images into H264 using x264 API? (C/C++) ). I know how to encode raw audio samples into ogg/vorbis. Now, how do I put one and one together for VLC?

• php exec command to encode video to h.264 mp4 file using ffmpeg and x264 tool on ubuntu

  7 avril 2012, par matt

  I have a dedicated server with ffmpeg and the x264 tool installed. I can encode any video and works really well. But now I need to encode videos to play on iPads, iPhones... the format needs to be mp4 and using the h.264 codec.

  I'm using PHP to enconde videos, I'm just looking for an exec command to do the above encoding. what I'm using for the other videos is:

  exec("ffmpeg -i movie.mov -sameq -acodec mp3 -ar 22050 -ab 32 -f flv -s 1280x720 movie.flv");
  

  I just need something similar to that for encoding mp4 by the way, I can't use libx264. I can only use the x264 tool

  Cheers

• ffmpeg-X264 encode —BGRA to AVFrame(ffmpeg) and viceversa ? for IOS

  6 avril 2012, par Asta ni enohpi

  Am working Video Processing in IOS(iphone/ipod/ipad) Using Objective c. i am using AVFoundation Framework to Capture Video . i want to Encode/decode those video frame using ffmpeg-libx264. i have compiled ffmpeg-x264 lib for ios. i got kCVPixelFormatType_32BGRA from AVFoundation.

  my problem is
  1.How to convert kCVPixelFormatType_32BGRA to AVFrame for enode using avcodec_encode_video?

  2.How to convert AVFrame to kCVPixelFormatType_32BGRA @ decode side from avcodec_decode_video2?

  Please help me to start above process or give path for working tutorial .Thanks in advance.