编码或解码器设置后可以进行逐行扫描和隔行扫描,例如: decodec_ctx_v->field_order = AV_FIELD_TT; 在AVFrame结构体中,interlaced_frame参数可以查看是否隔行: /*** The content of the picture is interlaced.*/int interlaced_frame; 解码后的AVFrame包中,弱是隔行则interlaced_frame为1,否则为0。 以及t...
3、Main profile:主流画质。提供I/P/B 帧,支持无交错(Progressive)和交错(Interlaced),也支持CAVL...
ffmpeg [[infile options][`-i' infile]]… {[outfile options] outfile}… As a general rule, options are applied to the next specified file. Therefore, order is important, and you can have the same option on the command line multiple times. Each occurrence is then applied to the next inpu...
Interlaced video is a technique of doubling the perceived frame rate introduced with the signal without consuming extra bandwidth.In common shorthand format identifiers like 576i50 and 720p50, the frame rate is specified for progressive scan formats, but for interlaced formats, the field rate is ty...
interlaced_frame:视频帧内容是否是交错的,即 AVFrame->interlaced_frame。 top_field_first:若视频帧内容是交错的,表示首先展示的顶部域,即 AVFrame->top_field_first。 repeat_pict:当解码时,这个信号表明视频帧必须延迟多少。extra_delay = repeat_pict / (2*fps),即 AVFrame->repeat_pict。 color_range:额...
-ss position (input/output):当在 -i 前,表示定位输入文件到 position 指定的位置。注意可能一些格式是不支持精确定位的,所以 ffmpeg 可能是定位到最接近 position(在之前)的可定位点。position 可以是以秒为单位的数值或者 hh:mm:ss.xxx 格式的时间值。
1、Baseline Profile:基本画质。支持I/P 帧,只支持无交错(Progressive)和CAVLC; 2、Extended profile:进阶画质。支持I/P/B/SP/SI 帧,只支持无交错(Progressive)和CAVLC;(用的少) 3、Main profile:主流画质。提供I/P/B 帧,支持无交错(Progressive)和交错(Interlaced), ...
Like the -ss option but relative to the “end of file”. That is negative values are earlier in the file, 0 is at EOF. -itsoffset offset (input) 设置输入时间偏量 Set the input time offset. offset must be a time duration specification, see (ffmpeg-utils)the Time duration section in ...
1、Baseline Profile:基本画质。支持I/P 帧,只支持无交错(Progressive)和CAVLC; 2、Extended profile:进阶画质。支持I/P/B/SP/SI 帧,只支持无交错(Progressive)和CAVLC;(用的少) 3、Main profile:主流画质。提供I/P/B 帧,支持无交错(Progressive)和交错(Interlaced), ...
ffmpeg -hwaccel vaapi -hwaccel_output_format vaapi ... -i interlaced_input.mp4 -vf 'deinterlace_vaapi,scale_vaapi=w=1280:h=720,hwdownload,format=nv12' -c:v libx264 ... progressive_output.mp41 4.编码 编码器仅接受输入作为VAAPI表面。如果输入在普通存储器中,则需要在将帧提供给编码器之前上载...