matroska, to 'mymovie.mkv': Metadata: encoder : Lavf53.21.1 Stream #0.0: Video: mpeg4, yuv420p, 720x480 [PAR 8:9 DAR 4:3], q=2-31, 200 kb/s, 1k tbn, 29.97 tbc Stream #0.1: Audio: libvorbis, 48000 Hz, 5.1, s16 Stream #0.2: Subtitle: ass, 200 kb/s Stream mapping: S...
《1》、https://www.jianshu.com/p/e5e021ccc980 《2》、https://blogs.gentoo.org/lu_zero/2016/03/21/bitstream-filtering/ 《3》、http://www.xuhj.top/2018/06/26/ffmpeg-convert-to-ts-stream/ 《4》、https://cloud.tencent.com/developer/article/1333501 《5》、sps/pps数据结构《6》、avc1...
void video_refresh_timer(void *userdata) { ... // Update delay to sync to audio,取得声音播放时间戳(作为视频同步的参考时间) if (is->av_sync_type != AV_SYNC_VIDEO_MASTER) {//检查主同步时钟源 ref_clock = get_master_clock(is);//根据主时钟来判断Video播放的快慢,以主时钟为基准时间 diff...
The output is video.mov. I convert this to mp4 using ffmpeg: ffmpeg -i video.mov -vcodec h264 -acodec aac video.mp4 If I use a tool like exiftool to show the metadata the output for content-type is video/mp4 all seems to be correct. But my backend, which receives ...
error: can't connect to X server!libva info: VA-API version 1.21.0libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.solibva info: va_openDriver() returns -1libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.solibva info: va_open...
其他的格式是packed存储模式,即:各个通道数据是交错存储在一起,此时数据访问只能通过data[0]来进行偏移计算, data[1], data[2],... 等都是空的 三、转换示例代码 直接使用libswscale库进行转换 /// 视频帧格式转换//int32_tVideoConvert(constAVFrame*pInFrame,// 输入视频帧AVPixelFormateOutFormat,// 输...
Create a video from a set of input images. Convert File Format Perform file format conversion without re-encoding the streams. For example, converting between MKV and MP4. Re-Encode Video Re-encode a video with a different encoder and options. For example, H.264 to AV1. ...
return 返回数据,解码失败返回错误信息,解码成功返回 AVPacket 被消耗的字节数。解码后得到 PCM 格式的音频数据。 解码后进行重采样,调用 API:swr_convert 来完成。图中可以看到 API:swr_alloc_set_opts 在解码之前就已经被调用了,拿到这里来是想把它和 swr_convert 一起讲,这样会更清楚设置参数的 API 和执行重...
* Convert an AVRational to a`double`. * @param a AVRational to convert * @return`a`in floating-point form * @see av_d2q()*/ static inline double av_q2d(AVRational a){ return a.num /(double) a.den; } av_q2d()使用方法如下: ...
intswr_convert_frame(SwrContext*swr,// 转码上下文AVFrame*output,// 转码后输出到这个AVFrameconstAVFrame*input// 原始输入AVFrame); 这个方法要求输入输出的AVFrame都设置了channel_layout、 sample_rate、format参数,然后回调用av_frame_get_buffer为output创建数据buff: ...