ffmpeg -i videoWithAudio.mp4 -vn -acodec copy onlyAudio.aac 很简单,对不对? 现在让我们看下另一种情况:当你提取音频后想要重新对它进行编码。下面是如何使用FFmpeg从视频中提取音频,然后使用libmp3lame将音频编码为不同的质量,并将其存储为mp3文件。 ffmpeg.exe -i videoWithAudio.mp4 -vn -c:a libmp3...
在ffmpeg命令行中,"copy"是一种音视频处理操作,用于复制输入文件的音视频流到输出文件,而不进行任何编码或转码操作。它通常用于快速提取或复制音视频流,以保持原始的编码格式和质量。 具体而言,"copy"操作可以用于以下场景: 提取音频或视频流:通过使用"copy"操作,可以从一个多媒体文件中提取出音频或视频流,而无需...
Mirror of https://git.ffmpeg.org/ffmpeg.git. Contribute to FFmpeg/FFmpeg development by creating an account on GitHub.
AV_INPUT_BUFFER_PADDING_SIZE);if((ret = alloc_and_copy(out, spspps_pkt.data, spspps_pkt.size, buf, nal_size))<0)gotofail;/*s->new_idr = 0;*//*if only SPS has been seen, also insert PPS*/}/*else if (s->new_idr && unit_type == 5 && s->idr_sps_seen && !s->idr_p...
copy /b source_video1.mp4 + source_video2.mp4 out.mp4 | FFmpeg -i out.mp4 -sameq final_video.mpg You May Also Like 8 Best Video Special Effects Apps in 2025 [iOS & Android] Are you looking for ways to make your content more visually appealing? Read this article to learn about the...
Remuxing is the act of changing from one format (container) to another, for instance, we can change a MPEG-4 video to a MPEG-TS one without much pain using FFmpeg:ffmpeg input.mp4 -c copy output.tsIt'll demux the mp4 but it won't decode or encode it (-c copy) and in the end...
*/ AVRational time_base; /* video only */ /** * picture width / height. * - encoding: MUST be set by user. * - decoding: Set by libavcodec. * Note: For compatibility it is possible to set this instead of * coded_width/height before decoding. */ int width, height; ... /* ...
如果不想重新编码video,需要加上-vcodec copy 修改音视频码率 * 将视频文件 `test.mp4` 中的视频码率限制为 400kpbs,音频码率限制为 192kpbs,并分别重新编码视频数据和音频数据,将编码后的音视频数据混合保存为 MP4 文件 `output_bva.mp4`: 代码语言:javascript 复制 ``` ffmpeg -i test.mp4 -b:v 400k ...
-vcodec codec:指定视频的编码器,需使用能力集列表中的名称(编解码器设定为”copy“表示不进行编解码)。 -r fps:设定视频编码器的帧率,整数,单位fps。 -pix_fmt format:设置视频编码器使用的图像格式(如RGB还是YUV)。 -ar sample rate:设定音频编码器的采样率,整数,单位Hz。 -b bitrate:设定音视频编码器输出...
ffmpeg -i in.flv -c copy -f mp4 out.mp4 以上命令,将in.flv进行stream copy,转封装成mp4. Key Frame Seeking The fastest way to extract a portion of video from a larger video (with a 60 second clip starting 30 seconds in) would be the following: ...