16#ifndef OPENSHOT_FFMPEG_WRITER_H
17#define OPENSHOT_FFMPEG_WRITER_H
121 int64_t video_timestamp;
122 int64_t audio_timestamp;
124 bool prepare_streams;
129 AVStream *audio_st, *video_st;
130 AVCodecContext *video_codec_ctx;
131 AVCodecContext *audio_codec_ctx;
132 SwsContext *img_convert_ctx;
134 uint8_t *audio_outbuf;
135 uint8_t *audio_encoder_buffer;
137 int num_of_rescalers;
138 int rescaler_position;
139 std::vector<SwsContext *> image_rescalers;
141 int audio_outbuf_size;
142 int audio_input_frame_size;
143 int initial_audio_input_frame_size;
144 int audio_input_position;
145 int audio_encoder_buffer_size;
150 int original_sample_rate;
151 int original_channels;
153 std::shared_ptr<openshot::Frame> last_frame;
154 std::map<std::shared_ptr<openshot::Frame>, AVFrame *> av_frames;
157 void add_avframe(std::shared_ptr<openshot::Frame> frame, AVFrame *av_frame);
160 AVStream *add_audio_stream();
163 AVStream *add_video_stream();
166 AVFrame *allocate_avframe(
PixelFormat pix_fmt,
int width,
int height,
int *buffer_size, uint8_t *new_buffer);
169 void auto_detect_format();
172 void close_audio(AVFormatContext *oc, AVStream *st);
175 void close_video(AVFormatContext *oc, AVStream *st);
178 void flush_encoders();
181 void initialize_streams();
186 void InitScalers(
int source_width,
int source_height);
189 void open_audio(AVFormatContext *oc, AVStream *st);
192 void open_video(AVFormatContext *oc, AVStream *st);
195 void process_video_packet(std::shared_ptr<openshot::Frame> frame);
198 void write_audio_packets(
bool is_final, std::shared_ptr<openshot::Frame> frame);
201 bool write_video_packet(std::shared_ptr<openshot::Frame> frame, AVFrame *frame_final);
204 void write_frame(std::shared_ptr<Frame> frame);
307 void WriteFrame(std::shared_ptr<openshot::Frame> frame);
Header file for FFmpegUtilities.
Header file for ReaderBase class.
Header file for WriterBase class.
This class uses the FFmpeg libraries, to write and encode video files and audio files.
void Close()
Close the writer.
void SetAudioOptions(bool has_audio, std::string codec, int sample_rate, int channels, openshot::ChannelLayout channel_layout, int bit_rate)
Set audio export options.
void SetOption(openshot::StreamType stream, std::string name, std::string value)
Set custom options (some codecs accept additional params). This must be called after the PrepareStrea...
void PrepareStreams()
Prepare & initialize streams and open codecs. This method is called automatically by the Open() metho...
void SetVideoOptions(bool has_video, std::string codec, openshot::Fraction fps, int width, int height, openshot::Fraction pixel_ratio, bool interlaced, bool top_field_first, int bit_rate)
Set video export options.
bool IsOpen()
Determine if writer is open or closed.
void ResampleAudio(int sample_rate, int channels)
Set audio resample options.
void WriteHeader()
Write the file header (after the options are set). This method is called automatically by the Open() ...
static bool IsValidCodec(std::string codec_name)
Determine if codec name is valid.
void OutputStreamInfo()
Output the ffmpeg info about this format, streams, and codecs (i.e. dump format)
void WriteFrame(std::shared_ptr< openshot::Frame > frame)
Add a frame to the stack waiting to be encoded.
void WriteTrailer()
Write the file trailer (after all frames are written). This is called automatically by the Close() me...
void RemoveScalers()
Remove & deallocate all software scalers.
This class represents a fraction.
This abstract class is the base class, used by all readers in libopenshot.
This abstract class is the base class, used by writers. Writers are types of classes that encode vide...
This namespace is the default namespace for all code in the openshot library.
ChannelLayout
This enumeration determines the audio channel layout (such as stereo, mono, 5 point surround,...
StreamType
This enumeration designates the type of stream when encoding (video or audio)
@ AUDIO_STREAM
An audio stream (used to determine which type of stream)
@ VIDEO_STREAM
A video stream (used to determine which type of stream)