39 #ifndef OPENSHOT_FFMPEG_WRITER_H 40 #define OPENSHOT_FFMPEG_WRITER_H 154 int64_t video_timestamp;
155 int64_t audio_timestamp;
157 bool prepare_streams;
163 AVStream *audio_st, *video_st;
164 AVCodecContext *video_codec_ctx;
165 AVCodecContext *audio_codec_ctx;
166 SwsContext *img_convert_ctx;
168 uint8_t *audio_outbuf;
169 uint8_t *audio_encoder_buffer;
171 int num_of_rescalers;
172 int rescaler_position;
173 std::vector<SwsContext *> image_rescalers;
175 int audio_outbuf_size;
176 int audio_input_frame_size;
177 int initial_audio_input_frame_size;
178 int audio_input_position;
179 int audio_encoder_buffer_size;
184 int original_sample_rate;
185 int original_channels;
187 std::shared_ptr<openshot::Frame> last_frame;
188 std::deque<std::shared_ptr<openshot::Frame> > spooled_audio_frames;
189 std::deque<std::shared_ptr<openshot::Frame> > spooled_video_frames;
191 std::deque<std::shared_ptr<openshot::Frame> > queued_audio_frames;
192 std::deque<std::shared_ptr<openshot::Frame> > queued_video_frames;
194 std::deque<std::shared_ptr<openshot::Frame> > processed_frames;
195 std::deque<std::shared_ptr<openshot::Frame> > deallocate_frames;
197 std::map<std::shared_ptr<openshot::Frame>, AVFrame *> av_frames;
200 void add_avframe(std::shared_ptr<openshot::Frame> frame, AVFrame *av_frame);
203 AVStream *add_audio_stream();
206 AVStream *add_video_stream();
209 AVFrame *allocate_avframe(
PixelFormat pix_fmt,
int width,
int height,
int *buffer_size, uint8_t *new_buffer);
212 void auto_detect_format();
215 void close_audio(AVFormatContext *oc, AVStream *st);
218 void close_video(AVFormatContext *oc, AVStream *st);
221 void flush_encoders();
224 void initialize_streams();
229 void InitScalers(
int source_width,
int source_height);
232 void open_audio(AVFormatContext *oc, AVStream *st);
235 void open_video(AVFormatContext *oc, AVStream *st);
238 void process_video_packet(std::shared_ptr<openshot::Frame> frame);
241 void write_audio_packets(
bool is_final);
244 bool write_video_packet(std::shared_ptr<openshot::Frame> frame, AVFrame *frame_final);
247 void write_queued_frames();
307 void SetAudioOptions(std::string codec,
int sample_rate,
int bit_rate);
357 void WriteFrame(std::shared_ptr<openshot::Frame> frame);
A video stream (used to determine which type of stream)
int GetCacheSize()
Get the cache size (number of frames to queue before writing)
void OutputStreamInfo()
Output the ffmpeg info about this format, streams, and codecs (i.e. dump format)
An audio stream (used to determine which type of stream)
Header file for ReaderBase class.
Header file for OpenMPUtilities (set some common macros)
This class uses the FFmpeg libraries, to write and encode video files and audio files.
static bool IsValidCodec(std::string codec_name)
Determine if codec name is valid.
This abstract class is the base class, used by all readers in libopenshot.
Header file for CacheMemory class.
bool IsOpen()
Determine if writer is open or closed.
void WriteFrame(std::shared_ptr< openshot::Frame > frame)
Add a frame to the stack waiting to be encoded.
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.
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 RemoveScalers()
Remove & deallocate all software scalers.
Header file for WriterBase class.
This abstract class is the base class, used by writers. Writers are types of classes that encode vide...
This class represents a fraction.
Header file for ZeroMQ-based Logger class.
void ResampleAudio(int sample_rate, int channels)
Set audio resample options.
ChannelLayout
This enumeration determines the audio channel layout (such as stereo, mono, 5 point surround...
void SetCacheSize(int new_size)
Set the cache size.
Header file for global Settings class.
void WriteTrailer()
Write the file trailer (after all frames are written). This is called automatically by the Close() me...
void WriteHeader()
Write the file header (after the options are set). This method is called automatically by the Open() ...
void Close()
Close the writer.
This namespace is the default namespace for all code in the openshot library.
void PrepareStreams()
Prepare & initialize streams and open codecs. This method is called automatically by the Open() metho...
Header file for FFmpegUtilities.
FFmpegWriter(const std::string &path)
Constructor for FFmpegWriter. Throws an exception on failure to open path.
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...
StreamType
This enumeration designates the type of stream when encoding (video or audio)