串流类型为以下之一: v 代表视讯 (video), a 代表音讯 (audio), s 代表字幕 (subtitle), d 代表资料 (data), t 代表附件 (attachments )。例如 -b:a:0 128k 即设定第1个音讯串流的输出位元率为128kbps。若无指定串流索引则代表全部该类型串流,例如 -c:s copy 即复制全部字幕串流至输出档案内。 第3输...
1、添加软字幕 void Subtitles::addSubtitleStream(string videopath,string spath,string dstpath){if(dstpath.rfind(".mkv")!=dstpath.length()-4){LOGD("can only suport .mkv file");return;}int ret=0;// 打开视频流if(avformat_open_input(&vfmt,videopath.c_str(),NULL,NULL)<0){LOGD("avfo...
*/ enum CodecID audio_codec_id; /** * Forced subtitle codec_id. * Demuxing: Set by user. */ enum CodecID subtitle_codec_id; /** * Maximum amount of memory in bytes to use for the index of each stream. * If the index exceeds this size, entries will be discarded as * needed t...
-af filter_graph set audio filters Subtitle options: -s size set frame size (WxH or abbreviation) -sn disable subtitle -scodec codec force subtitle codec ('copy' to copy stream) -stag fourcc/tag force subtitle tag/fourcc -fix_sub_duration fix subtitles duration -canvas_size size set canvas...
Subtitle options: -s size set frame size (WxH or abbreviation) -sn disable subtitle -scodec codec force subtitle codec ('copy' to copy stream) -stag fourcc/tag force subtitle tag/fourcc -fix_sub_duration fix subtitles duration -canvas_size size set canvas size (WxH or abbreviation) ...
Subtitle options: -s size set frame size (WxH or abbreviation) -sn disable subtitle -scodec codec force subtitle codec ('copy' to copy stream) -stag fourcc/tag force subtitle tag/fourcc -fix_sub_duration fix subtitles duration -canvas_size size set canvas size (WxH or abbreviation) ...
*/ enum CodecID audio_codec_id; /** * Forced subtitle codec_id. * Demuxing: Set by user. */ enum CodecID subtitle_codec_id; /** * Maximum amount of memory in bytes to use for the index of each stream. * If the index exceeds this size, entries will be discarded as * needed ...
FFMPEG中如果你编码完一段视频发现视频变短了,那很有可能就是没有设置0延时的原因。 近日在做一个分布式转码服务器,解码器是采用开源的ffmpeg,在开发的过程中遇到一个问题:编码延迟多大5、6秒钟,也就是最初编码的几十帧并不能马上取出,而我们的要求是实时编码!虽然我对视频编码方面不是很熟悉,但根据开发的经验...
d/e/a/v/s: decoder【解码器】/encoder【编码器】/audio【音频】/video【视频】/subtitle【字幕】 dar/sar/par: 图像和视频的纵横比/ 图像或视频帧的长宽比,取决于视频源 / 像素宽度与其高度之比, 一般是 1:1, DAR = PAR x SAR iw/ow/ih/oh: input/ouput width/height ...
-s size set frame size(WxH or abbreviation)-sn disable subtitle-scodec codec force subtitle codec('copy'to copy stream)-stag fourcc/tag force subtitle tag/fourcc-fix_sub_duration fix subtitles duration-canvas_size size set canvas size(WxH or abbreviation)-spre preset set the subtitle options ...