-threads:1 4会将第二个流的线程计数设置为4。如果将stream_index用作附加的流说明符(请参见下文),则它将从匹配的流中选择号码为stream_index的流。流的编号是基于libavformat检测到的流顺序决定的,除非额外指定了程序ID,在这种情况下,它基于程序中流的顺序。 stream_type[:additional_stream_specifier] stream_...
func: set frame size (WxH or abbreviation), needed for videos which do not contain a header with the frame size like raw YUV. This option has been deprecated in favor of private options, try -video_size. example: 此命令时同时设置宽高,但是执行结果却让人感到意外,提示-s这个参数已经被弃用,...
现在使用logger=None。 ...threads:用于ffmpeg的线程数,可以加快多核计算机上视频输出的速度ffmpeg_params:需额外传递的其他ffmpeg参数,用列表传递,形如:[’-option1’,‘value1’, 35300 html5 video视频标签播放视频实现遇到的坑 问题一,video标签支持视频播放格式有限制; 一共支持三种格式: Ogg、MPEG4、WebM,...
.id = AV_CODEC_ID_H264, .priv_data_size = sizeof(X264Context), .init = X264_init, .encode2 = X264_frame, .close = X264_close, .capabilities = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS, .long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 par...
-threads <int> ED.V.. (from 0 to INT_MAX) auto ED.V.. autodetect a suitable number of threads to use -me_threshold <int> E..V.. motion estimation threshold (from INT_MIN to INT_MAX) -mb_threshold <int> E..V.. macroblock threshold (from INT_MIN to INT_MAX) ...
(),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(...
(),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 itself as some codecs are multithreaded. 6. * 7. * @see av_log_default_callback 8. * 9. * @param callback A logging function with a compatible signature. 10. */ 11. void av_log_set_callback(void (*callback)(void*, int, const char*, va_list)); 1. 2. 3. 4....
或者通过ffmpeg -decoders查看ffmpeg是否支持H.264解码器。 ffmpeg -codecs ffmpeg -encoders ffmpeg -decoders 输出信息中包含了三部分内容,具体如下。 第一列包含6个字段,第一个字段用来表示此编码器为音频、视频还是字幕,第二个字段表示帧级别的多线程支持,第三个字段表示分片级别的多线程,第四个字段表示该编码...
ffmpeg -i script.avs -i src.mkv -i sub.ass -map0:0 -map1:1 -map1:1 -map2:0 -c:v libx264 -preset veryslow -profile:v high -crf16.5-deblock -1:-1 -mbtree1-aq-mode3-aq-strength0.8-psy-rd0.6:0.15 -x264-paramsthreads=6:keyint=600:min-keyint=1:bframes=8:ref=5:qcomp=0.7...