73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
#include <stdio.h>
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#include <libavformat/avformat.h>
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int main(int argc, char * argv[])
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{
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if (argc < 2)
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{
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fprintf(stderr, "Usage: %s <filename>\n", argv[0]);
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return 1;
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}
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AVFormatContext * context = NULL;
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av_register_all();
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if (avformat_open_input(&context, argv[1], NULL, NULL) != 0)
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{
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fprintf(stderr, "Error opening input stream %s\n", argv[1]);
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return 1;
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}
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if (avformat_find_stream_info(context, NULL) < 0)
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{
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fprintf(stderr, "Error finding stream info\n");
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return 1;
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}
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av_dump_format(context, 0, argv[1], 0);
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int video_stream_idx = av_find_best_stream(context, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
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printf("Video stream index: %d\n", video_stream_idx);
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int audio_stream_idx = av_find_best_stream(context, AVMEDIA_TYPE_AUDIO, -1, -1, NULL, 0);
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printf("Audio stream index: %d\n", audio_stream_idx);
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AVPacket pkt;
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av_init_packet(&pkt);
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int n_total_frames = 0;
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int n_video_frames = 0;
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int n_audio_frames = 0;
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int max_video_size = 0;
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int total_video_size = 0;
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int max_audio_size = 0;
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int total_audio_size = 0;
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while (av_read_frame(context, &pkt) >= 0)
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{
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n_total_frames++;
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if (pkt.stream_index == video_stream_idx)
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{
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n_video_frames++;
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total_video_size += pkt.size;
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if (pkt.size > max_video_size)
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max_video_size = pkt.size;
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}
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if (pkt.stream_index == audio_stream_idx)
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{
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n_audio_frames++;
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total_audio_size += pkt.size;
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if (pkt.size > max_audio_size)
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max_audio_size = pkt.size;
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}
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}
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printf("Saw %d frames: %d video and %d audio (%d other)\n",
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n_total_frames, n_video_frames, n_audio_frames,
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n_total_frames - n_video_frames - n_audio_frames);
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printf("Video size: %d, max: %d, average: %d\n",
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total_video_size, max_video_size, total_video_size / n_video_frames);
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printf("Audio size: %d, max: %d, average: %d\n",
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total_audio_size, max_audio_size, total_audio_size / n_audio_frames);
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avformat_close_input(&context);
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return 0;
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}
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