I'm leaving it up to you to figure out how to do that. If you intend to crop many frames, try to retain the filter graph between frames and only reset it (or recreate it) when the frame size/format changes.
The input frame data is untouched so if you don't need it beyond this function, you need to av_frame_free() the input frame also. Ret = av_buffersink_get_frame(buffersink_ctx, f) ĭon't forget to unref the returned (croppped) frame using av_frame_free(). Ret = av_buffersrc_add_frame(buffersrc_ctx, f) Ret = avfilter_graph_config(filter_graph, NULL) īuffersrc_ctx = avfilter_graph_get_filter(filter_graph, "Parsed_buffer_0") īuffersink_ctx = avfilter_graph_get_filter(filter_graph, "Parsed_buffersink_2") Ret = avfilter_graph_parse2(filter_graph, args, &inputs, &outputs) Īssert(inputs = NULL & outputs = NULL)
You can edit all types of audio files from this too including MP3, WAV or OGG. This encoder is used to edit video and audio files, you can edit MP4/FLV/MKV/3GP or MOV files. Static AVFrame *crop_frame(const AVFrame *in, int left, int top, int right, int bottom)ĪVFilterGraph *filter_graph = avfilter_graph_alloc() ĪVFilterInOut *inputs = NULL, *outputs = NULL First you need to download and install FFmpeg encoder which you can download from here: Download FFmpeg. To use vf_crop, use the buffer and buffersink filters in libavfilter: #include "libavfilter/avfilter.h"
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