**kwargs – 传递给get_args()(例如 overwrite_output=True)的关键字参数。 返回: (out, err) 元组,包含捕获的 stdout 和 stderr 数据。 ffmpeg.run_async( stream_spec , cmd='ffmpeg' , pipe_stdin=False , pipe_stdout=False , pipe_stderr=False , quiet=False , overwrite_output=False ) 为提供...
{ "y", OPT_BOOL, { &file_overwrite }, "overwrite output files" }, { "n", OPT_BOOL, { &no_file_overwrite }, "do not overwrite output files" }, { "c", HAS_ARG | OPT_STRING | OPT_SPEC,{ (void*) OFFSET(codec_names) }, "codec name", "codec" }, { "codec", HAS_ARG ...
-f fmt (input/output) Force input or output file format. The format is normally auto detected for input files and guessed from the file extension for output files, so this option is not needed in most cases. -y (global) Overwrite output files without asking yes的那个y。 -n (global) Do...
-f fmt (input/output) Force input or output file format. The format is normally auto detected for input files and guessed from the file extension for output files, so this option is not needed in most cases. -y (global) Overwrite output files without asking yes的那个y。 -n (global) Do...
-y overwrite output files -n never overwrite output files -ignore_unknown Ignore unknown stream types -filter_threads number of non-complex filter threads -filter_complex_threads number of threads for -filter_complex -stats print progress report during encoding ...
-n never overwrite output files -ignore_unknown Ignore unknown stream types -filter_threads number of non-complex filter threads -filter_complex_threads number of threads for -filter_complex -stats print progress report during encoding -max_error_rate maximum error rate ratio of decoding errors (0....
init_simple_filtergraph()为每组Stream(OutputStream和它的源InputStream)创建一个FilterGraph来容纳连接它们的Filters。 作为初始化OutputStream的最后步骤,assert_file_overwrite()检查是否目标文件是否存在,询问用户是否覆盖等。如果不存在,或用户选择覆盖,avio_open2()初始化底层写组件。
6、输出流OutputStream涉及音视频同步,结构和InputStream不同,暂时只作记录,不分析 三种时间基 tbr、tbn 和 tbc 不同的封装格式具有不同的时间基。在 FFmpeg 处理音视频过程中的不同阶段,也会采用不同的时间基。 FFmepg 中有三种时间基,命令行中 tbr、tbn 和 tbc 的打印值就是这三种时间基的倒数: ...
-n never overwrite output files -ignore_unknown Ignore unknown stream types -filter_threads number of non-complex filter threads -filter_complex_threads number of threads for -filter_complex -stats print progress report during encoding -max_error_rate maximum error rate ratio of ...
-n never overwrite output files -ignore_unknown Ignore unknown stream types -filter_threads number of non-complex filter threads -filter_complex_threads number of threads for -filter_complex -stats print progress report during encoding -max_error_rate maximum error rate ratio of errors (0.0: no ...