问如何解决ffmpeg卡在‘打开一个输入文件’的问题ENchm的设计者的初衷是用来做帮助文档，其本质是一堆html网页文件的组合。后来有了专门的编译器、反编译器，人们发现chm这东西具有的html的特性，使其用来做电子书实在是又好又方便，连html里面的脚本特效什么的都能保留下来。所以现在有很多资料采用这种格式。
* @note The callback may be called again immediately if initialization for the selected (hardware-accelerated) pixel format failed. * @warning Behavior is undefined if the callback returns a value not in the fmt list of formats. * @return the chosen format * - encoding: unused * - decodi...
int av_opt_set(void *obj, const char *name, const char *val, int search_flags) { int ret; void *dst, *target_obj; const AVOption *o = av_opt_find2(obj, name, NULL, 0, search_flags, &target_obj); if (!o || !target_obj) return AVERROR_OPTION_NOT_FOUND; if (!val && ...
* When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized * image data is stored in AVFrame.data[0]. The palette is transported in * AVFrame.data[1], is 1024 bytes long (256 4-byte entries) and is * formatted the same as in PIX_FMT_RGB32 described above (i.e...
AVClass 先来看 AVClass 的结构如下: /** * Describe the class of an AVClass context structure. That is an * arbitrary struct of which the first field is a point
Sometimes it might be necessary to mix CPU and GPU processing. For example you may need to decode on the CPU, because the format is unsupported on the GPU decoder, or because a filter is not available on the GPU. In those cases, you can’t use the -hwaccel cuvid or -hwaccel cuda fl...
av_log(s, AV_LOG_ERROR, "Format not on whitelist \'%s\'\n", s->format_whitelist); ret = AVERROR(EINVAL); goto fail; } //跳过打开文件时的初始字节,在encoding中没有效果,在decoding中用户自己设置 avio_skip(s->pb, s->skip_initial_bytes); ...
* - encoding: Set by user * - decoding: unused */ int audio_preload; /** * Max chunk time in microseconds. * Note, not all formats support this and unpredictable things may happen if it is used when not supported. * - encoding: Set by user * - decoding: unused */ int max_...
LD doc/examples/demuxing_decoding_g ld: warning: directory not found for option '-Llibavresample' STRIP doc/examples/demuxing_decoding 为了修改方便,而网上又没有只管举例的相关完整的实例,所以在这里写一个例子,供大伙参考 /* * Copyright (c) 2017 bbs.chinaffmpeg.com 孙悟空 ...
/** This file is part of FFmpeg.** FFmpeg is free software; you can redistribute it and/or* modify it under the terms of the GNU Lesser General Public* License as published by the Free Software Foundation; either* version 2.1 of the License, or (at your option) any later version.**...