[Libav-user] Artifacts while encoding x264 video

[Christian Brümmer]

Hi,

i get strange artifacts while encoding a few dummy images to videoframes.

this is the result: http://youtu.be/pL0bKaxTBiU

This is my c-code configuration:

     codec = stream->codec;
     codec->codec_id = codecID;
     codec->codec_type = AVMEDIA_TYPE_VIDEO;
     codec->bit_rate = mParameters.mBitRate;
     codec->width = mParameters.mWidth;
     codec->height = mParameters.mHeight;
     codec->time_base.den = mParameters.mFrameRate;
     codec->time_base.num = 1;
     codec->gop_size = mParameters.mFrameRate;
     codec->pix_fmt = PIXEL_FORMAT;
     codec->b_frame_strategy = 0;
     codec->level = 12;

     // for H264
     codec->me_range = 16;
     codec->max_qdiff = 4;
     // lower value for higher quality range: 0-52
     codec->qmin = 10;
     codec->qmax = 26;
     codec->qcompress = 0.6;

with parameters:

   param.mBitRate = 40000;
   param.mCodec = "x264";
   param.mFrameRate = 24;
   param.mHeight = 480;
   param.mWidth = 800;

What can be the reason for those very ugly artifacs appearing every few 
seconds?

Best regards,
Christian
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ffmpeg.org/pipermail/libav-user/attachments/20120531/878cd230/attachment.html>