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attempt to setup variable bitrate. Improved codec params

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This commit is contained in:
csoler 2015-08-31 22:41:38 -04:00
parent 68918bf9c1
commit 3d9e3e8b7c
1 changed files with 37 additions and 24 deletions
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61
plugins/VOIP/gui/VideoProcessor.cpp
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@ -26,7 +26,7 @@ extern "C" {
//#define DEBUG_MPEG_VIDEO 1
VideoProcessor::VideoProcessor()
:_encoded_frame_size(176,144) , vpMtx("VideoProcessor")
:_encoded_frame_size(640,480) , vpMtx("VideoProcessor")
{
_decoded_output_device = NULL ;
@ -554,7 +554,8 @@ FFmpegVideo::FFmpegVideo()
encoding_context = NULL ;
//AVCodecID codec_id = AV_CODEC_ID_H264 ;
AVCodecID codec_id = AV_CODEC_ID_MPEG1VIDEO;
//AVCodecID codec_id = AV_CODEC_ID_MPEG2VIDEO;
AVCodecID codec_id = AV_CODEC_ID_MPEG4;
uint8_t endcode[] = { 0, 0, 1, 0xb7 };
@ -568,31 +569,42 @@ FFmpegVideo::FFmpegVideo()
if (!encoding_context) throw std::runtime_error("AV: Could not allocate video codec encoding context");
/* put sample parameters */
encoding_context->bit_rate = 30*1024 ; // default bitrate is 30KB/s
encoding_context->bit_rate = 10*1024 ; // default bitrate is 30KB/s
encoding_context->bit_rate_tolerance = encoding_context->bit_rate ;
#ifdef USE_VARIABLE_BITRATE
encoding_context->rc_min_rate = 0;
encoding_context->rc_max_rate = 81920;
encoding_context->rc_buffer_size = 1024*1024;
encoding_context->rc_max_rate = 10*1024;//encoding_context->bit_rate;
encoding_context->rc_buffer_size = 10*1024*1024;
encoding_context->rc_initial_buffer_occupancy = (int) ( 0.9 * encoding_context->rc_buffer_size);
encoding_context->rc_max_available_vbv_use = 1.0;
encoding_context->rc_min_vbv_overflow_use = 0.0;
#else
encoding_context->rc_min_rate = 0;
encoding_context->rc_max_rate = 0;
encoding_context->rc_buffer_size = 0;
#endif
encoding_context->flags |= CODEC_FLAG_PSNR;
encoding_context->flags |= CODEC_FLAG_TRUNCATED;
encoding_context->flags |= CODEC_CAP_PARAM_CHANGE;
encoding_context->i_quant_factor = 0.769f;
encoding_context->b_quant_factor = 1.4f;
encoding_context->time_base.num = 1;
encoding_context->time_base.den = 15;//framesPerSecond;
encoding_context->qmin = 1;
encoding_context->qmax = 51;
encoding_context->max_qdiff = 4;
//encoding_context->me_method = ME_HEX;
//encoding_context->max_b_frames = 4;
//encoding_context->flags |= CODEC_FLAG_LOW_DELAY; // MPEG2 only
//encoding_context->partitions = X264_PART_I4X4 | X264_PART_I8X8 | X264_PART_P8X8 | X264_PART_P4X4 | X264_PART_B8X8;
//encoding_context->crf = 0.0f;
//encoding_context->cqp = 26;
encoding_context->i_quant_factor = 0.769f;
encoding_context->b_quant_factor = 1.4f;
encoding_context->rc_initial_buffer_occupancy = (int) ( 0.9 * encoding_context->rc_buffer_size);
encoding_context->rc_max_available_vbv_use = 0.9;
encoding_context->rc_min_vbv_overflow_use = 0.1;
encoding_context->time_base.num = 1;
encoding_context->time_base.den = 15;//framesPerSecond;
//encoding_context->me_method = ME_HEX;
encoding_context->qmin = 10;
encoding_context->qmax = 51;
encoding_context->max_qdiff = 4;
encoding_context->max_b_frames = 4;
/* resolution must be a multiple of two */
encoding_context->width = 352;//176;
encoding_context->height = 288;//144;
encoding_context->width = 640;//176;
encoding_context->height = 480;//144;
/* frames per second */
encoding_context->time_base = (AVRational){1,25};
/* emit one intra frame every ten frames
@ -601,8 +613,8 @@ FFmpegVideo::FFmpegVideo()
* then gop_size is ignored and the output of encoder
* will always be I frame irrespective to gop_size
*/
encoding_context->gop_size = 250;
encoding_context->max_b_frames = 1;
encoding_context->gop_size = 100;
//encoding_context->max_b_frames = 1;
encoding_context->pix_fmt = AV_PIX_FMT_YUV420P; //context->pix_fmt = AV_PIX_FMT_RGB24;
if (codec_id == AV_CODEC_ID_H264)
@ -698,8 +710,9 @@ bool FFmpegVideo::encodeData(const QImage& image, uint32_t target_encoding_bitra
std::cerr << "Max encodign bitrate eexceeded. Capping to " << MAX_FFMPEG_ENCODING_BITRATE << std::endl;
target_encoding_bitrate = MAX_FFMPEG_ENCODING_BITRATE ;
}
encoding_context->bit_rate = target_encoding_bitrate;
encoding_context->bit_rate_tolerance = target_encoding_bitrate;
//encoding_context->bit_rate = target_encoding_bitrate;
encoding_context->rc_max_rate = target_encoding_bitrate;
//encoding_context->bit_rate_tolerance = target_encoding_bitrate;
if(image.width() != encoding_frame_buffer->width || image.height() != encoding_frame_buffer->height)
input = image.scaled(QSize(encoding_frame_buffer->width,encoding_frame_buffer->height),Qt::IgnoreAspectRatio,Qt::SmoothTransformation) ;