| 1 | #include <stdio.h>
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| 2 | #include <inttypes.h>
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| 3 | #include <libavformat/avformat.h>
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| 4 | #include <libavcodec/avcodec.h>
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| 5 |
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| 6 | int main ( int argc, char *argv[] )
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| 7 | {
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| 8 | AVCodec *video_codec;
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| 9 | AVFormatContext *format_context;
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| 10 | AVFrame *picture;
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| 11 | int width = 0, height = 0;
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| 12 | unsigned int i;
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| 13 | int videostream;
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| 14 | AVCodecContext *video_codec_context = NULL;
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| 15 |
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| 16 | av_register_all();
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| 17 | av_log_set_level( AV_LOG_QUIET );
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| 18 |
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| 19 | if ( av_open_input_file( &format_context, argv[1], NULL, 0, NULL ) != 0)
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| 20 | return -1;
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| 21 |
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| 22 | if ( av_find_stream_info( format_context ) < 0 )
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| 23 | return -2;
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| 24 |
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| 25 | videostream = -1;
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| 26 |
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| 27 | for ( i = 0; i < format_context->nb_streams; i++ ) {
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| 28 | if ( format_context->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO ) {
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| 29 | videostream = i;
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| 30 | }
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| 31 | }
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| 32 |
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| 33 | if ( videostream == -1 )
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| 34 | return -3;
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| 35 |
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| 36 | video_codec_context = format_context->streams[videostream]->codec;
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| 37 | if (!video_codec_context)
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| 38 | return -4;
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| 39 |
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| 40 | width = video_codec_context->width;
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| 41 | height = video_codec_context->height;
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| 42 |
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| 43 | video_codec = avcodec_find_decoder ( video_codec_context->codec_id );
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| 44 | if (!video_codec)
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| 45 | return -5;
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| 46 |
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| 47 | picture = avcodec_alloc_frame();
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| 48 | if (!picture)
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| 49 | return -6;
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| 50 |
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| 51 | if (avcodec_open ( video_codec_context, video_codec ) < 0)
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| 52 | return -7;
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| 53 |
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| 54 | AVFrame *pictured;
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| 55 | uint8_t *picture_buf;
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| 56 | int size;
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| 57 |
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| 58 | pictured = avcodec_alloc_frame();
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| 59 | if (!pictured)
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| 60 | return -8;
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| 61 |
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| 62 | size = avpicture_get_size( PIX_FMT_YUV420P, width, height );
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| 63 |
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| 64 | picture_buf = ( uint8_t* )av_malloc( size );
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| 65 | if (!picture_buf)
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| 66 | return -9;
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| 67 |
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| 68 | size = avpicture_fill( ( AVPicture * )pictured, picture_buf, PIX_FMT_YUV420P, width, height );
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| 69 | if (size < 0)
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| 70 | return -10;
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| 71 |
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| 72 | AVPacket packet;
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| 73 | int got_picture, len;
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| 74 |
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| 75 | int64_t pts = -1;
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| 76 |
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| 77 | pts = atoi( argv[2] );
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| 78 | int seek_result = 0;
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| 79 | #ifdef NEW_SEEK
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| 80 | seek_result = avformat_seek_file( format_context, videostream, pts, pts, pts, AVSEEK_FLAG_ANY );
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| 81 | #else
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| 82 | seek_result = av_seek_frame( format_context, videostream, pts, AVSEEK_FLAG_ANY );
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| 83 | #endif
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| 84 | printf("seek result: %d\n", seek_result);
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| 85 |
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| 86 | if (av_read_frame( format_context, &packet ) < 0)
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| 87 | return -11;
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| 88 |
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| 89 | printf("timestamps %8" PRId64 " ", packet.dts);
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| 90 | printf(" %8" PRId64 "", AV_NOPTS_VALUE == packet.pts ? 0 : packet.pts);
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| 91 |
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| 92 | if ( packet.stream_index == videostream ) {
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| 93 | len = avcodec_decode_video2 ( video_codec_context, picture, &got_picture, &packet );
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| 94 |
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| 95 | if ( len < 0 )
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| 96 | return -12;
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| 97 | else
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| 98 | if ( got_picture )
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| 99 | printf(" %8" PRId64 "", AV_NOPTS_VALUE == picture->pts ? 0 : picture->pts);
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| 100 | }
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| 101 | printf("\n");
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| 102 | return 0;
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| 103 | }
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