linuxserver/ffmpeg \-i /video/20230720081206.mp4 \-threads auto \-vf"crop=in_w-(122*16/9):in_h-122:0:122,scale=1280:720"\-c:v libx264 \-b:v 2M \-c:a copy \/video/1.20230720081206.mp4 命令解释:将当前目录下的视频文件:20230720081206.mp4 裁掉视频顶部122像素的画面,视频右侧以16:9...
4、 设置threads=auto时,线程数为逻辑CPU个数的1.5倍。 3.2 x264各类型帧的大小及编码耗时 (注:作参考,未必属实) I帧、B帧、P帧都极大地受编码参数的影响。 通常情况下: h264编码的帧由大到小依次为: I > P > B (互相之间约有5倍的差距) x264的编码耗时由长到短依次为: P > B > I 通常而言,...
opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec); if (!av_dict_get(opts, "threads", NULL, 0)) av_dict_set(&opts, "threads", "auto", 0); if (avctx->lowres) av_dict_set(&opts, "lowres", av_asprintf("%d", avctx->lowres),...
opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec); if (!av_dict_get(opts, "threads", NULL, 0)) av_dict_set(&opts, "threads", "auto", 0); if (avctx->lowres) av_dict_set(&opts, "lowres", av_asprintf("%d", avctx->lowres),...
(HAVE_THREADS && !avctx->thread_opaque && !(avctx->internal->frame_thread_encoder && (avctx->active_thread_type&FF_THREAD_FRAME))) { ret = ff_thread_init(avctx); if (ret < 0) { goto free_and_end; } } if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS))...
(),0);//设置超时断开连接时间,单位微秒,3000000表示3秒av_dict_set(&options,"stimeout","3000000",0);//设置最大时延,单位微秒,1000000表示1秒av_dict_set(&options,"max_delay","1000000",0);//自动开启线程数av_dict_set(&options,"threads","auto",0);//设置USB摄像机分辨率if(url.startsWith(...
-threads 4 4核运算 其他参数: -s 1280x720 设置输出文件的分辨率,w*h。 -b:v 输出文件的码率,一般500k左右即可,人眼看不到明显的闪烁,这个是与视频大小最直接相关的。 -preset 指定输出的视频质量,会影响文件的生成速度,有以下几个可用的值 ultrafast, superfast, veryfast, faster, fast, medium, slow, ...
例如-threads:1 4将设置第二个流的线程计数为4。 stream_type[:stream_index] 流类型是下列字母之一:v为视频,a为声音,s为字幕,d为数据,t为附件。如果stream_index给出,则它匹配该类型的索引为stream_index的流。否则,它匹配所有这种类型的流。 p:program_id[:stream_index] 如果给定stream_index,那其将与...
--disable-pthreads disable pthreads [autodetect] --disable-w32threads disable Win32 threads [autodetect] --disable-os2threads disable OS/2 threads [autodetect] --disable-network disable network support [no] --disable-dct disable DCT code ...
(Rev10, Built by MSYS2 project)configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-zlib --enable-libsrt --enable-...