broken ffmpeg default settings detected

Question

I am getting broken ffmpeg error while VideoWrite using X264 Fourcc codec.I have install all the dependencies.How can I rectify this problem.The sample code that I have been using is as follows.

VideoWriter oVideoWriter ("path.mp4", CV_FOURCC('X','2','6','4'), 15, frameSize, false);

Operating system : Ubuntu 14.04 64-bit

Console Error:

[libx264 @ 0x8d6220] broken ffmpeg default settings detected
[libx264 @ 0x8d6220] use an encoding preset (e.g. -vpre medium)
[libx264 @ 0x8d6220] preset usage: -vpre <speed> -vpre <profile>
[libx264 @ 0x8d6220] speed presets are listed in x264 --help
[libx264 @ 0x8d6220] profile is optional; x264 defaults to high
Could not open codec 'libx264': Unspecified errorOpenCV Error: Unsupported format or combination of formats (Your version of Gstreamer doesn't support this codec acutally or needed plugin missing.) in CvVideoWriter_GStreamer::open, file /home/mbox140/Development/opencv-2.4.9/modules/highgui/src/cap_gstreamer.cpp, line 518
terminate called after throwing an instance of 'cv::Exception'
  what():  /home/mbox140/Development/opencv-2.4.9/modules/highgui/src/cap_gstreamer.cpp:518: error: (-210) Your version of Gstreamer doesn't support this codec acutally or needed plugin missing. in function CvVideoWriter_GStreamer::open

Suggest me any solution for this.

Antisemite

What is the actual ffmpeg command (if using the cli tools and not the API)? What is the actual, complete ffmpeg console/log output? – Tims

@LordNeckbeard I have updated my question with console log,Please look into this – Antisemite

Please show the complete console output and the command too if possible. – Tims

ffmpeg -i input_file -acodec libmp3lame -vcodec libx264 -y output.mp4 i am using this command , getting same error – Jeanett

Are you insisting on h264? You could try using some other codec, such as MJPG for example. – Lotion

Maybe your gstreamer is out of date? – Diehl

Is the video playable? If your settings are wrong in OpenCV, it will create an ill-formatted video. – Disbud

Answer 1

You might want to ensure you have the latest version of the libx264 codec. You can do this by:

sudo apt-get install --reinstall x264 libx264-dev

The error also indicates an issue with GStreamer not having the necessary plugins. You can install GStreamer plugins using:

sudo apt-get install gstreamer0.10-plugins-base gstreamer0.10-plugins-good gstreamer0.10-plugins-bad gstreamer0.10-plugins-ugly

Domingo

Answer 2

for the error:

[libx264 @ 0x8d6220] broken ffmpeg default settings detected
[libx264 @ 0x8d6220] use an encoding preset (e.g. -vpre medium)
[libx264 @ 0x8d6220] preset usage: -vpre <speed> -vpre <profile>
[libx264 @ 0x8d6220] speed presets are listed in x264 --help
[libx264 @ 0x8d6220] profile is optional; x264 defaults to high

you may need the command -vpre perset (e.g. -vpre fast). maybe you libx264 is too old. I meet the same error while using a ffmpeg built in 2014.

Witkin

Since libx264 is called indirectly, there is no way to give additional ffmpeg switches on any command line. – Rapture

Answer 3

I don't remember if you need to re build opencv with open h264 support, but for sure, standart opencv doesn't provide h264 codec. Here is a hint:

http://answers.opencv.org/question/104346/how-to-encode-a-h264-video-on-windows/

Walburga

The question is about OpenCv on Linux. – Rapture

Answer 4

please install libx264-dev and try compiling openvc3.0 with that. follow this link

Electronic