search for: aspect_denomin

...deinterlace; int sample_rate; int channels; int disable_audio; float audio_quality; int output_width; int output_height; double fps; ImgReSampleContext *img_resample_ctx; /* for image resampling/resizing */ ReSampleContext *audio_resample_ctx; ogg_uint32_t aspect_numerator; ogg_uint32_t aspect_denominator; double frame_aspect; int video_quality; /* cropping */ int frame_topBand; int frame_bottomBand; int frame_leftBand; int frame_rightBand; int video_x; int video_y; int frame_x_offset; int frame_y_offset; int start_time; /* In seconds */ int end_time; /* In seconds */ } *ff2the...

Can someone enlighten me on what the status is of aspect ratio in theora is ? The ti structure has aspect_num and _den values, which I assume give the intended display aspect ratio (e.g. 4/3). The sample files on the bittorrent seem to say both values are 0 for all files. I'd think it should at least be made impossible to have a 0 as the denominator. The library doesn't check the

Hi, Attached is my patch to add theora encoding to ffmpeg's libavcodec (by using libtheora). I am requesting help to fix the bug I mention below and am seeking general comments before I submit the patch properly. Files encoded using this encoder have a problem playing in VLC. The files will not play unless "Drop late frames" has been unticked in the advanced video settings.

...ti.frame_height = ((320 + 15)>>4)<<4; ti.pic_width = 480; ti.pic_height = 320; ti.pic_x = 0; ti.pic_y = 0; ti.fps_numerator = 30; ti.fps_denominator = 1; ti.aspect_numerator = 0; ti.aspect_denominator = 0; ti.colorspace = TH_CS_UNSPECIFIED; ti.pixel_fmt = TH_PF_422; ti.target_bitrate = -1; ti.quality = 48; ti.keyframe_granule_shift=ilog(keyframe_frequency-1); What can cause such a problem? Regards Mario

...ll therefore ask some questions about some of the parameters in the th_info structure: th_info info; info.fps_numerator = 10; info.fps_denominator = 1; My understanding is that this is the framerate, and that the parameters above means 10 frames per second, Is that right? info.aspect_denominator = 0; info.aspect_numerator = 0; Here I use the default, and hope that is OK. info.keyframe_granule_shift = 10; I'm uncertain on what the intention of the parameter is. It seems like it is the frequency keyframes are sent in, so the parameter above would mean that every 10th fra...

...(&m_ti); m_ti.width=176; m_ti.height=144; m_ti.frame_width=176; m_ti.frame_height=144; m_ti.offset_x=0; m_ti.offset_y=0; m_ti.fps_denominator=(ogg_uint32_t)1000000.0; m_ti.fps_numerator=10 * m_ti.fps_denominator; //10 is 10 frames per second m_ti.aspect_numerator=1; m_ti.aspect_denominator=1; m_ti.colorspace=OC_CS_UNSPECIFIED; m_ti.target_bitrate=0; // 0 if we are specifying quality m_ti.quality=5; // from 0 to 10, 10 is highest quality but higher files m_ti.dropframes_p=0; m_ti.quick_p=1; // should always be 1 m_ti.keyframe_auto_p=1; m_ti.keyframe_frequency...

...Any restrictions ? Also the other encoding parameters... i am just using the default values shown in the encoder example... For the bitrate fields... what happens if i set it to 0 ? Will it do some default action ? Also the aspect ratio fields... i am just setting aspect_numerator = videoWidth aspect_denominator = videoHeight Am i correct in doing this ? Any restrictions ? Also... i'm noticing that most of the filters in directshow output YUY2 and not YUV12... just curious if there is code floating around somewhere to do the conversion before i write it myself... it doesn't look too complex a...

...= FRAME_HEIGHT; tTheoraInfo.offset_x = iFrameOffsetX; tTheoraInfo.offset_y = iFrameOffsetY; tTheoraInfo.fps_numerator = iVideoFPSnum; tTheoraInfo.fps_denominator = iVideoFPSden; tTheoraInfo.aspect_numerator = iVideoAspNum; tTheoraInfo.aspect_denominator = iVideoAspDen; tTheoraInfo.colorspace = OC_CS_UNSPECIFIED; tTheoraInfo.pixelformat = OC_PF_420; tTheoraInfo.target_bitrate = iVideoBitrate; tTheoraInfo.quality = iVideoQuality; tTheoraInfo.dropframes_p = 0; tTheor...

Hello, I wrote a theora video encoder based on etheora (and the examples provided with it) for Processing IDE (processing.org). I have some problem with the quality of encoded frames. eg. http://poux.be/tmp/movie.ogg And when I play the movie with mplayer or totem, the video resolution is changed from 640x480 to 854x480 (when i use ETHEORA_ASPECT_NORMAL in etheora_enc_setup). And if I try to

...| | FRD: fps_denominator | 24-27 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | PARN: aspect_numerator | 28-31 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | PARD: aspect_denominator | 32-35 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | CS: colorspace| NOMBR: target_bitrate | 36-39 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | QUAL | KFGSHIFT| PF| resv|...

...test application I saw that the encoding process with Theora is too CPU expensive ( compared to FFmpeg - MP4 ) ... Perhaps I'm using wrong parameters: ti.fps_numerator = fps * 11 + 1; // var framerate ti.fps_denominator = 11; ti.aspect_numerator = 1; ti.aspect_denominator = 1; ti.colorspace = OC_CS_ITU_REC_470BG; // OC_CS_UNSPECIFIED; ti.pixelformat = OC_PF_420; ti.target_bitrate = 0; ti.quality = 1 * 6.3; ti.dropframes_p = 0; ti.quick_p = 1; ti.keyframe_au...

...ht = frame_y; videostream->ti.offset_x = frame_x_offset; videostream->ti.offset_y = frame_y_offset; videostream->ti.fps_numerator = refreshrate * 1000000; videostream->ti.fps_denominator = 10 * 100000; videostream->ti.aspect_numerator = 0; videostream->ti.aspect_denominator = 0; videostream->ti.colorspace = OC_CS_UNSPECIFIED; videostream->ti.target_bitrate = video_r; videostream->ti.quality = 1; videostream->ti.dropframes_p = 0; videostream->ti.quick_p = 1; videostream->ti.keyframe_auto_p = 1; videostream->ti.keyfr...

...ti.frame_width = frame_x; ti.frame_height = frame_y; ti.offset_x = frame_x_offset; ti.offset_y = frame_y_offset; ti.fps_numerator = video_hzn; ti.fps_denominator = video_hzd; ti.aspect_numerator = video_an; ti.aspect_denominator = video_ad; ti.colorspace = OC_CS_UNSPECIFIED; ti.pixelformat = OC_PF_420; ti.target_bitrate = video_r; ti.quality = video_q; ti.dropframes_p = 0; ti.quick_p = 1; ti.keyframe_auto_p...

...eight; double fps; @@ -123,6 +127,9 @@ this->video_bitrate=0; this->audio_quality=0.297;// audio quality 3 this->audio_bitrate=0; + this->smoothness=0; + this->keyint=64; + this->noautosync=0; this->force_input_fps=0; this->aspect_numerator=0; this->aspect_denominator=0; @@ -150,6 +157,21 @@ int64_t frame_number=0; double fps = 0.0; + /* 20041216/DK variables that help us keep track of A/V sync */ + double v_pts_out = 0.0; + double v_pts_in = 0.0; + double a_pts_out = 0.0; + double v_pts_delta = 1e99; + double v_pts_delta_new = 0.0; + double a_pts_delt...

Hello everyone, I'm currently developing an adaptive videoconferencing application based on Ekiga which uses TFRC as a congestion control mechanism to adapt the video encoding rate according to the quality of the network experienced. My goal was to use the open-source Theora codec for video transmission. Unfortunately, it seemed that Theora 1.0 did not properly implement any correct CBR mode.