#include <theora.h>
Data Fields | |
| ogg_uint32_t | width |
| encoded frame width | |
| ogg_uint32_t | height |
| encoded frame height | |
| ogg_uint32_t | frame_width |
| display frame width | |
| ogg_uint32_t | frame_height |
| display frame height | |
| ogg_uint32_t | offset_x |
| horizontal offset of the displayed frame | |
| ogg_uint32_t | offset_y |
| vertical offset of the displayed frame | |
| ogg_uint32_t | fps_numerator |
| frame rate numerator | |
| ogg_uint32_t | fps_denominator |
| frame rate denominator | |
| ogg_uint32_t | aspect_numerator |
| pixel aspect ratio numerator | |
| ogg_uint32_t | aspect_denominator |
| pixel aspect ratio denominator | |
| theora_colorspace | colorspace |
| colorspace | |
| int | target_bitrate |
| nominal bitrate in bits per second | |
| int | quality |
| Nominal quality setting, 0-63. | |
| int | quick_p |
| Quick encode/decode. | |
| unsigned char | version_major |
| unsigned char | version_minor |
| unsigned char | version_subminor |
| void * | codec_setup |
| int | dropframes_p |
| int | keyframe_auto_p |
| ogg_uint32_t | keyframe_frequency |
| ogg_uint32_t | keyframe_frequency_force |
| ogg_uint32_t | keyframe_data_target_bitrate |
| ogg_int32_t | keyframe_auto_threshold |
| ogg_uint32_t | keyframe_mindistance |
| ogg_int32_t | noise_sensitivity |
| ogg_int32_t | sharpness |
| theora_pixelformat | pixelformat |
| chroma subsampling mode to expect | |
Contains the basic playback parameters for a stream, corresponding to the initial 'info' header packet.
Encoded theora frames must be a multiple of 16 in width and height. To handle other frame sizes, a crop rectangle is specified in frame_height and frame_width, offset_x and * offset_y. The offset and size should still be a multiple of 2 to avoid chroma sampling shifts. Offset values in this structure are measured from the upper left of the image.
Frame rate, in frames per second, is stored as a rational fraction. Aspect ratio is also stored as a rational fraction, and refers to the aspect ratio of the frame pixels, not of the overall frame itself.
See examples/encoder_example.c for usage examples of the other paramters and good default settings for the encoder parameters.
1.5.1