Video writer interface.
The implementation uses H264 video codec.
Note
Currently only Windows platform is supported.
Note
Writes the next video frame.
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The method write the specified image to video file. The image must have the same size and the same surface format as has been specified when opening the video writer.
Creates video writer.
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The constructors initialize video writer. FFMPEG is used to write videos. User can implement own multiplexing with cudacodec::EncoderCallBack .
Different parameters for CUDA video encoder.
struct EncoderParams
{
int P_Interval; // NVVE_P_INTERVAL,
int IDR_Period; // NVVE_IDR_PERIOD,
int DynamicGOP; // NVVE_DYNAMIC_GOP,
int RCType; // NVVE_RC_TYPE,
int AvgBitrate; // NVVE_AVG_BITRATE,
int PeakBitrate; // NVVE_PEAK_BITRATE,
int QP_Level_Intra; // NVVE_QP_LEVEL_INTRA,
int QP_Level_InterP; // NVVE_QP_LEVEL_INTER_P,
int QP_Level_InterB; // NVVE_QP_LEVEL_INTER_B,
int DeblockMode; // NVVE_DEBLOCK_MODE,
int ProfileLevel; // NVVE_PROFILE_LEVEL,
int ForceIntra; // NVVE_FORCE_INTRA,
int ForceIDR; // NVVE_FORCE_IDR,
int ClearStat; // NVVE_CLEAR_STAT,
int DIMode; // NVVE_SET_DEINTERLACE,
int Presets; // NVVE_PRESETS,
int DisableCabac; // NVVE_DISABLE_CABAC,
int NaluFramingType; // NVVE_CONFIGURE_NALU_FRAMING_TYPE
int DisableSPSPPS; // NVVE_DISABLE_SPS_PPS
EncoderParams();
explicit EncoderParams(const String& configFile);
void load(const String& configFile);
void save(const String& configFile) const;
};
Constructors.
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Creates default parameters or reads parameters from config file.
Reads parameters from config file.
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Saves parameters to config file.
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Callbacks for CUDA video encoder.
class EncoderCallBack
{
public:
enum PicType
{
IFRAME = 1,
PFRAME = 2,
BFRAME = 3
};
virtual ~EncoderCallBack() {}
virtual unsigned char* acquireBitStream(int* bufferSize) = 0;
virtual void releaseBitStream(unsigned char* data, int size) = 0;
virtual void onBeginFrame(int frameNumber, PicType picType) = 0;
virtual void onEndFrame(int frameNumber, PicType picType) = 0;
};
Callback function to signal the start of bitstream that is to be encoded.
Callback must allocate buffer for CUDA encoder and return pointer to it and it’s size.
Callback function to signal that the encoded bitstream is ready to be written to file.