Hi, I have compiled and installed ffmpeg successfully on Ubuntu 16.04 using this article - https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu
I tried to compile the *extract_mvs.c *example using following *command*- gcc -w -I ~/ffmpeg_build/include/ extract_mvs.c -o example.o -L ~/ffmpeg_build/lib/ But it is throwing following *errors:* /tmp/ccTGuZpN.o: In function `av_make_error_string': extract_mvs.c:(.text+0x24): undefined reference to `av_strerror' /tmp/ccTGuZpN.o: In function `decode_packet': extract_mvs.c:(.text+0x9d): undefined reference to `avcodec_decode_video2' extract_mvs.c:(.text+0x126): undefined reference to `av_frame_get_side_data' /tmp/ccTGuZpN.o: In function `open_codec_context': extract_mvs.c:(.text+0x292): undefined reference to `av_find_best_stream' extract_mvs.c:(.text+0x2ac): undefined reference to `av_get_media_type_string' extract_mvs.c:(.text+0x314): undefined reference to `avcodec_find_decoder' extract_mvs.c:(.text+0x329): undefined reference to `av_get_media_type_string' extract_mvs.c:(.text+0x367): undefined reference to `av_dict_set' extract_mvs.c:(.text+0x37e): undefined reference to `avcodec_open2' extract_mvs.c:(.text+0x391): undefined reference to `av_get_media_type_string' /tmp/ccTGuZpN.o: In function `main': extract_mvs.c:(.text+0x43b): undefined reference to `av_register_all' extract_mvs.c:(.text+0x459): undefined reference to `avformat_open_input' extract_mvs.c:(.text+0x49b): undefined reference to `avformat_find_stream_info' extract_mvs.c:(.text+0x53b): undefined reference to `av_dump_format' extract_mvs.c:(.text+0x576): undefined reference to `av_frame_alloc' extract_mvs.c:(.text+0x5c7): undefined reference to `av_init_packet' extract_mvs.c:(.text+0x6b2): undefined reference to `av_packet_unref' extract_mvs.c:(.text+0x6c6): undefined reference to `av_read_frame' extract_mvs.c:(.text+0x70a): undefined reference to `avcodec_close' extract_mvs.c:(.text+0x714): undefined reference to `avformat_close_input' extract_mvs.c:(.text+0x71e): undefined reference to `av_frame_free' collect2: error: ld returned 1 exit status Please suggest any changes necessary for compiling this program in detail. Thanks in advance. -- Ashish _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
