#ifdef__cplusplusextern"C"{#endif#include#include

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ffmpeg API錄制rtsp視頻流

系統(tǒng) 1926 0

原文出自 http://blog.csdn.net/zxwangyun/article/details/8190638#reply ?? 作者? Sloan

?

這里在錄制時(shí)，并沒有進(jìn)行轉(zhuǎn)碼，只是相當(dāng)于把rtsp視頻直接保存到一個(gè)文件中。

  1. #include?<stdio.h> ??
  2. ??
  3. #ifdef?__cplusplus ??
  4. extern ? "C" ?{??
  5. #endif ??
  6. #include?<libavcodec/avcodec.h> ??
  7. #include?<libavformat/avformat.h> ??
  8. //#include?<libswscale/swscale.h> ??
  9. ??
  10. #ifdef?_MSC_VER ??
  11. int ?strcasecmp( const ? char ?*s1,? const ? char ?*s2)??
  12. {??
  13. ???? while ?((*s1?!=? '\0' )??
  14. ????????&&?(tolower(*(unsigned? char ?*)?s1)?==??
  15. ????????tolower(*(unsigned? char ?*)?s2)))???
  16. ????{??
  17. ????????s1++;??
  18. ????????s2++;??
  19. ????}??
  20. ??
  21. ???? return ?tolower(*(unsigned? char ?*)?s1)?-?tolower(*(unsigned? char ?*)?s2);??
  22. }??
  23. int ?strncasecmp( const ? char ?*s1,? const ? char ?*s2,?unsigned? int ?n)??
  24. {??
  25. ???? if ?(n?==?0)??
  26. ???????? return ?0;??
  27. ??
  28. ???? while ?((n--?!=?0)??
  29. ????????&&?(tolower(*(unsigned? char ?*)?s1)?==??
  30. ????????tolower(*(unsigned? char ?*)?s2)))?{??
  31. ???????????? if ?(n?==?0?||?*s1?==? '\0' ?||?*s2?==? '\0' )??
  32. ???????????????? return ?0;??
  33. ????????????s1++;??
  34. ????????????s2++;??
  35. ????}??
  36. ??
  37. ???? return ?tolower(*(unsigned? char ?*)?s1)?-?tolower(*(unsigned? char ?*)?s2);??
  38. }??
  39. #endif?//_MSC_VER ??
  40. ??
  41. #ifdef?__cplusplus ??
  42. }??
  43. #endif ??
  44. ??
  45. /*********************************************************** ?
  46. '**?stream_component_open ?
  47. *???Description:? ?
  48. *????????????//open?the?stream?component?for?video/audio ?
  49. * ?
  50. * ?
  51. *???Params:ic-pointer?which?contains?the?url?and?codec?details? ?
  52. :stream_index-index?denoting?video?or?audio?stream ?
  53. ***********************************************************/ ??
  54. int ?stream_component_open(AVFormatContext?*ic,? int ?stream_index)??
  55. {??
  56. ????AVCodecContext?*enc;??
  57. ????AVCodec?*codec;??
  58. ??
  59. ???? if ?(stream_index?<?0?||?stream_index?>=?( int )ic->nb_streams)??
  60. ???????? return ?-1;??
  61. ????enc?=?ic->streams[stream_index]->codec;??
  62. ??
  63. ???? /*?prepare?audio?output?*/ ??
  64. ???? if ?(enc->codec_type?==?CODEC_TYPE_AUDIO)??
  65. ????{??
  66. ???????? if ?(enc->channels?>?0)??
  67. ????????????enc->request_channels?=?FFMIN(2,?enc->channels);??
  68. ???????? else ??
  69. ????????????enc->request_channels?=?2;??
  70. ??
  71. ???????? /*Hardcoding?the?codec?id?to?PCM_MULAW?if?the?audio ?
  72. ????????codec?id?returned?by?the?lib?is?CODEC_ID_NONE?*/ ??
  73. ??
  74. ???????? if (enc->codec_id?==?CODEC_ID_NONE)??
  75. ????????{??
  76. ????????????enc->codec_id?=?CODEC_ID_PCM_MULAW;??
  77. ????????????enc->channels?=?1;??
  78. ????????????enc->sample_rate?=?16000;??
  79. ????????????enc->bit_rate?=?128;??
  80. ????????}??
  81. ????}??
  82. ??
  83. ????codec?=?avcodec_find_decoder(enc->codec_id);??
  84. ????enc->idct_algo???????????=?FF_IDCT_AUTO;??
  85. ????enc->flags2???|=?CODEC_FLAG2_FAST;??
  86. ????enc->skip_frame??????????=?AVDISCARD_DEFAULT;??
  87. ????enc->skip_idct???????????=?AVDISCARD_DEFAULT;??
  88. ????enc->skip_loop_filter????=?AVDISCARD_DEFAULT;??
  89. ????enc->error_concealment???=?3;??
  90. ??
  91. ???? if ?(!codec?||?avcodec_open(enc,?codec)?<?0)??
  92. ???????? return ?-1;??
  93. ????avcodec_thread_init(enc,?1);??
  94. ????enc->thread_count=?1;??
  95. ????ic->streams[stream_index]->discard?=?AVDISCARD_DEFAULT;??
  96. ??
  97. ???? return ?0;??
  98. }??
  99. //聲明函數(shù) ??
  100. int ?enable_local_record(AVFormatContext?*ic /*已經(jīng)打開的視頻文件上下文*/ ,??
  101. ???????????????????????? int ?videostream, int ?audiostream,??
  102. ????????????????????????AVFormatContext?**out_oc, const ? char ?*?ofile, const ? char ?*?ofileformat);??
  103. ??
  104. int ?exit_onerr( const ? char ?*?err_desc /*錯(cuò)誤描述*/ , int ?err_code /*錯(cuò)誤碼*/ )??
  105. {??
  106. ????printf( "%s\n" ,err_desc);??
  107. ????system( "pause" ); //暫停，查看錯(cuò)誤描述 ??
  108. ???? return ?err_code;??
  109. }??
  110. int ?main( int ?argc,? char *?argv[])??
  111. {??
  112. ???? //初始化ffmpeg鏈表結(jié)構(gòu) ??
  113. ????avcodec_register_all();????????????????????? //?Register?all?formats?and?codecs ??
  114. ????av_register_all();??
  115. ??
  116. ????AVPacket??packet;??
  117. ??
  118. ???? //打開文件 ??
  119. ????AVFormatContext?*?ic?=?NULL;??
  120. ???? const ? char ?*?rtsp_url?=? "rtsp://192.168.0.168:8557/PSIA/Streaming/channels/2?videoCodecType=H.264" ;??
  121. ???? if (av_open_input_file(&ic,?rtsp_url,?NULL,?0,?NULL)!=0)??
  122. ????{?????????????????????????
  123. ???????? return ?exit_onerr( "can't?open?file." ,-1);??
  124. ????}??
  125. ???? if (!ic)??
  126. ????{??
  127. ???????? return ?exit_onerr( "unknow?error." ,-2);??
  128. ????}??
  129. ????ic?->max_analyze_duration?=?1000;??
  130. ??
  131. ???? //get?streams?information ??
  132. ???? if (av_find_stream_info(ic)<0)??
  133. ????{??
  134. ????????av_close_input_file(ic); //退出前，記得釋放資源 ??
  135. ????????ic?=?NULL;??
  136. ???????? return ?exit_onerr( "con't?init?streams?information." ,-3);??
  137. ????}??
  138. ??
  139. ??
  140. ???? //find?stream ??
  141. ???? int ?videoStream=-1;? //?Didn't?find?a?video?stream ??
  142. ???? int ?audioStream=-1;? //?Didn't?find?a?audio?stream? ??
  143. ???? //?Find?the?first?video?stream ??
  144. ???? for ( int ?i=0;?i<ic?->nb_streams;?i++)??
  145. ????{??
  146. ???????? if (?ic?->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO)??
  147. ????????{???
  148. ????????????videoStream=i;??
  149. ???????????? break ;??
  150. ????????}??
  151. ????}??
  152. ???? //?Find?the?first?audio?stream ??
  153. ???? for ( int ?i=0;?i<ic?->nb_streams;?i++)??
  154. ????{??
  155. ???????? if (?ic?->streams[i]->codec->codec_type==CODEC_TYPE_AUDIO)??
  156. ????????{??
  157. ????????????audioStream=i;??
  158. ???????????? break ;??
  159. ????????}??
  160. ????}??
  161. ???? //判斷視頻文件中是否包含音視頻流，如果沒有，退出 ??
  162. ???? if (audioStream<0?&&?videoStream<0)??
  163. ????{??
  164. ????????av_close_input_file(ic); //退出前，記得釋放資源 ??
  165. ????????ic?=?NULL;??
  166. ???????? return ?exit_onerr( "con't?find?a?audio?stream?or?video?stream" ,-4);??
  167. ????}??
  168. ??
  169. ???? //open?the?stream?component?for?video ??
  170. ???? int ?videoComponent?=?-1;??
  171. ???? if (videoStream?>=?0)??
  172. ????{??
  173. ????????videoComponent?=?stream_component_open(ic,?videoStream);???
  174. ???????? if (videoComponent<0)??
  175. ????????{??
  176. ????????????av_close_input_file(ic); //退出前，記得釋放資源 ??
  177. ???????????? return ?exit_onerr( "not?supported?video?stream" ,-5); //要求重新編譯ffmpeg以支持該種編碼格式 ??
  178. ????????}??
  179. ????}??
  180. ???? //open?the?stream?component?for?audio ??
  181. ???? int ?audioComponent?=?-1;??
  182. ???? if (audioStream?>=?0)??
  183. ????{??
  184. ????????audioComponent?=?stream_component_open(ic,?audioStream);???
  185. ???????? if (audioComponent<0)??
  186. ????????{??
  187. ????????????av_close_input_file(ic); //退出前，記得釋放資源 ??
  188. ???????????? return ?exit_onerr( "not?supported?audio?stream" ,-6); //要求重新編譯ffmpeg以支持該種編碼格式 ??
  189. ????????}??
  190. ????}??
  191. ??
  192. ??
  193. ???? ////////////////////////////////////////////////////// ??
  194. ???? int ?ret?=?0;??
  195. ???? //初始化并打開錄像 ??
  196. ????AVFormatContext?*?oc?=?NULL;??
  197. ???? const ? char ?*?out_file_name?=? "D:\\test.avi" ;??
  198. ??
  199. ???? //獲取一幀完整的圖像用于初始化ffmpeg內(nèi)部的一些結(jié)構(gòu)體數(shù)據(jù)(這里使用什么數(shù)據(jù)尚未清楚，請自行查看)，否則會(huì)出現(xiàn)寫文件頭失敗 ??
  200. ???? int ?got_picture?=?0;??
  201. ????AVFrame?*frame?=?avcodec_alloc_frame();??
  202. ???? while (?1?)??
  203. ????{??
  204. ???????? if (av_read_frame(?ic,?&packet)<0)??
  205. ????????{??
  206. ????????????av_free_packet(&packet);??
  207. ????????????av_close_input_file(ic); //退出前，記得釋放資源 ??
  208. ???????????? return ?exit_onerr( "read?frame?error." ,-7); //讀取視頻幀失敗 ??
  209. ????????}??
  210. ???????? if (packet.stream_index?==?videoStream)??
  211. ????????{??
  212. ????????????avcodec_decode_video(ic->streams[videoStream]->codec,?frame,?&got_picture,?packet.data,?packet.size);??
  213. ????????}??
  214. ????????av_free_packet(&packet);??
  215. ???????? if (got_picture)??
  216. ???????????? break ;??
  217. ????}??
  218. ????av_free(frame);??
  219. ??
  220. ????ret?=?enable_local_record(ic,videoStream,audioStream,&oc,out_file_name, "avi" );??
  221. ??
  222. ???? if (ret?<0?||?!oc)??
  223. ????{??
  224. ???????? //退出前，記得釋放資源，現(xiàn)在又多了個(gè)oc參數(shù)需要釋放 ??
  225. ???????? if (oc)??
  226. ????????{??
  227. ???????????? ///cleanup?the?output?contents?format ??
  228. ???????????? for (unsigned? int ?i=0;i<?oc->nb_streams;i++)??
  229. ????????????{??
  230. ????????????????av_metadata_free(&oc?->streams[i]->metadata);??
  231. ????????????????av_free(oc?->streams[i]->codec);??
  232. ????????????????av_free(oc?->streams[i]);??
  233. ????????????}??
  234. ???????????? for (unsigned? int ?i=0;i<oc?->nb_programs;i++)???
  235. ????????????{??
  236. ????????????????av_metadata_free(&oc?->programs[i]->metadata);??
  237. ????????????}??
  238. ???????????? for (unsigned? int ?i=0;i<oc?->nb_chapters;i++)???
  239. ????????????{??
  240. ????????????????av_metadata_free(&oc?->chapters[i]->metadata);??
  241. ????????????}??
  242. ????????????av_metadata_free(&oc?->metadata);??
  243. ????????????av_free(oc);??
  244. ????????}??
  245. ????????av_close_input_file(ic);??
  246. ???????? return ?exit_onerr( "can't?init?out?file." ,-8);??
  247. ????}??
  248. ??
  249. ???? //開始錄像 ??
  250. ???? int ?video_dts?=?0,audio_dts?=?0; //時(shí)間戳 ??
  251. ???? int ?total_frame?=?300; //寫300幀文件 ??
  252. ???? while (total_frame--)??
  253. ????{??
  254. ???????? if (?av_read_frame(?ic,?&packet)?<0?)????? //read?the?packet ??
  255. ????????{?????????
  256. ???????????? //讀取數(shù)據(jù)出錯(cuò) ??
  257. ????????????av_free_packet(&packet);??
  258. ???????????? break ;??
  259. ????????}??
  260. ???????? if (packet.data?&&?(packet.stream_index?==?videoStream?||?packet.stream_index?==?audioStream)?)??
  261. ????????{??
  262. ???????????? //計(jì)算時(shí)間視頻戳，順序+1，這里可以多研究幾種編碼的音視頻文件，求其時(shí)間戳生成格式，h264編碼順序加1即可 ??
  263. ???????????? if (packet.stream_index?==?videoStream)??
  264. ????????????{??
  265. ????????????????packet.dts?=?video_dts++;??
  266. ????????????????packet.pts?=?video_dts;??
  267. ????????????}??
  268. ???????????? else ? if (packet.stream_index?==?audioStream) //計(jì)算音頻時(shí)間戳 ??
  269. ????????????{??
  270. ????????????????packet.dts?=?audio_dts++;??
  271. ????????????????packet.pts?=?audio_dts?*?(1000?*?packet.size?/ic?->streams[packet.stream_index]->codec?->sample_rate);??
  272. ????????????}??
  273. ????????????packet.flags?|=?PKT_FLAG_KEY;??
  274. ???????????? if (av_interleaved_write_frame(oc,&packet)<0)??
  275. ????????????{??
  276. ????????????????printf( "st:%d\twrite?frame?failed.\n" ,packet.stream_index);??
  277. ????????????}??
  278. ????????}??
  279. ????????av_free_packet(&packet);??
  280. ????}??
  281. ??
  282. ???? //關(guān)閉錄像文件和輸入文件 ??
  283. ??
  284. ???? //寫文件尾 ??
  285. ????av_write_trailer(oc);??
  286. ??
  287. ???? /*?close?the?output?file?if?need.*/ ??
  288. ???? if ?(!(oc?->oformat->flags?&?AVFMT_NOFILE))???
  289. ????{??
  290. ????????url_fclose(oc->pb);??
  291. ????}??
  292. ??
  293. ???? //釋放資源 ??
  294. ???? /*cleanup?the?output?contents?format*/ ??
  295. ???? for (unsigned? int ?i=0;i<?oc->nb_streams;i++)??
  296. ????{??
  297. ????????av_metadata_free(&oc?->streams[i]->metadata);??
  298. ????????av_free(oc?->streams[i]->codec);??
  299. ????????av_free(oc?->streams[i]);??
  300. ????}??
  301. ???? for (unsigned? int ?i=0;i<oc?->nb_programs;i++)???
  302. ????{??
  303. ????????av_metadata_free(&oc?->programs[i]->metadata);??
  304. ????}??
  305. ???? for (unsigned? int ?i=0;i<oc?->nb_chapters;i++)???
  306. ????{??
  307. ????????av_metadata_free(&oc?->chapters[i]->metadata);??
  308. ????}??
  309. ????av_metadata_free(&oc?->metadata);??
  310. ????av_free(oc);??
  311. ??
  312. ????av_close_input_file(ic);??
  313. ??
  314. ???? return ?0;??
  315. }??
  316. ??
  317. //初始化錄像文件，代碼較長，可寫成函數(shù) ??
  318. /* ?
  319. *return?<0??failed,?0?success ?
  320. */ ??
  321. int ?enable_local_record(AVFormatContext?*ic /*已經(jīng)打開的視頻文件上下文*/ , int ?videostream, int ?audiostream,AVFormatContext?**out_oc, const ? char ?*?ofile, const ? char ?*?ofileformat)??
  322. {??
  323. ????AVFormatContext?*oc?????=?NULL; // ??
  324. ????AVOutputFormat??*fmt????=?NULL;??
  325. ??
  326. ???? if (?ofileformat?)??
  327. ????{??
  328. ????????fmt?=?av_guess_format(ofileformat,?NULL,?NULL);??
  329. ????}??
  330. ???? if (!fmt)??
  331. ????{??
  332. ????????printf( "out?file?format?\"%s\"?invalidate.\n" ,ofileformat);??
  333. ???????? return ?-1;??
  334. ????}??
  335. ??
  336. ???? /*******************************************init?output?contents?begin**********************************************************/ ??
  337. ???? /*?allocate?the?output?media?context?*/ ??
  338. ????oc?=?avformat_alloc_context();??
  339. ???? if ?(!oc)???
  340. ????{??
  341. ????????printf( "out?of?memory.\n" );??
  342. ???????? return ?-2; //內(nèi)存分配失敗 ??
  343. ????}??
  344. ??
  345. ????*out_oc?=?oc;??
  346. ??
  347. ????oc?->oformat?=?fmt;??
  348. ????sprintf_s(?oc?->filename,? sizeof (?oc?->filename),? "%s" ,?ofile);??
  349. ????av_metadata_conv(oc,?fmt->metadata_conv,?NULL);??
  350. ???? if (?videostream?>=0?)??
  351. ????{??
  352. ???????? //AVCodecContext*?pCodecCtx=?->streams[videostream]->codec;; ??
  353. ???????? //add?video?stream ??
  354. ????????AVStream?*?st?=?av_new_stream(oc,?videostream);??
  355. ???????? if (!st)??
  356. ????????{??
  357. ????????????printf( "can?not?add?a?video?stream.\n" );??
  358. ???????????? return ?-3;??
  359. ????????}??
  360. ????????st->codec->codec_id???????????=??ic?->streams[videostream]?->codec->codec_id;??
  361. ????????st->codec->codec_type?????=??CODEC_TYPE_VIDEO;??
  362. ????????st->codec->bit_rate???????????=??ic?->streams[videostream]?->codec->bit_rate;??
  363. ????????st->codec->width??????????=??ic?->streams[videostream]?->codec->width;??
  364. ????????st->codec->height?????????=??ic?->streams[videostream]?->codec->height;??
  365. ????????st->codec->gop_size???????????=??ic?->streams[videostream]?->codec->gop_size;??
  366. ????????st->codec->pix_fmt????????????=??ic?->streams[videostream]?->codec->pix_fmt;??
  367. ????????st->codec->frame_size?????=??ic?->streams[videostream]?->codec->frame_size;??
  368. ????????st->codec->has_b_frames???????=??ic?->streams[videostream]?->codec->has_b_frames;??
  369. ????????st->codec->extradata??????=??ic?->streams[videostream]?->codec->extradata;??
  370. ????????st->codec->extradata_size?=??ic?->streams[videostream]?->codec->extradata_size;??
  371. ????????st->codec->codec_tag??????=??ic?->streams[videostream]?->codec->codec_tag;??
  372. ????????st->codec->bits_per_raw_sample????????=??ic?->streams[videostream]?->codec->bits_per_raw_sample;??
  373. ????????st->codec->chroma_sample_location?=??ic?->streams[videostream]?->codec->chroma_sample_location;??
  374. ????????st->time_base.den????????????=??ic?->streams[videostream]?->time_base.den;??
  375. ????????st->time_base.num????????????=??ic?->streams[videostream]?->time_base.num;??
  376. ????????st->cur_dts??????????????????=??ic?->streams[videostream]?->cur_dts;??
  377. ????????st->stream_copy??????????????=??1;??
  378. ????????st->pts.den??????????????????=??ic?->streams[videostream]?->time_base.den;??
  379. ????????st->pts.num??????????????????=??ic?->streams[videostream]?->time_base.num;??
  380. ???????? if (?oc?->oformat->flags?&?AVFMT_GLOBALHEADER)??
  381. ????????????st?->codec->flags?|=?CODEC_FLAG_GLOBAL_HEADER;??
  382. ???????? if (av_q2d(ic?->streams[videostream]?->codec->time_base)*ic?->streams[videostream]?->codec->ticks_per_frame?>?av_q2d(ic?->streams[videostream]->time_base)?&&???
  383. ????????????av_q2d(ic?->streams[videostream]->time_base)?<?1.0/1000)??
  384. ????????{??
  385. ????????????st->codec->time_base?=?ic?->streams[videostream]?->codec->time_base;??
  386. ????????????st->codec->time_base.num?*=?ic?->streams[videostream]?->codec->ticks_per_frame;??
  387. ????????}??
  388. ???????? else ??
  389. ????????{??
  390. ????????????st->codec->time_base?=?ic?->streams[videostream]?->time_base;??
  391. ????????}??
  392. ????????st->disposition??????????????=??ic?->streams[videostream]?->disposition;??
  393. ????}??
  394. ???? if (audiostream?>=?0?)??
  395. ????{??
  396. ????????AVStream?*?st?=?av_new_stream(?oc,?audiostream);??
  397. ???????? if (!st)??
  398. ????????{??
  399. ????????????printf( "can?not?add?a?audio?stream.\n" );??
  400. ???????????? return ?-4;??
  401. ????????}??
  402. ????????st->codec->codec_id???????????=??ic?->streams[audiostream]?->codec->codec_id;??
  403. ????????st->codec->codec_type?????=??CODEC_TYPE_AUDIO;??
  404. ????????st->codec->bit_rate???????????=??ic?->streams[audiostream]?->codec->bit_rate;??
  405. ????????st->codec->gop_size???????????=??ic?->streams[audiostream]?->codec->gop_size;??
  406. ????????st->codec->pix_fmt????????????=??ic?->streams[audiostream]?->codec->pix_fmt;??
  407. ????????st->codec->bit_rate???????????=??ic?->streams[audiostream]?->codec->bit_rate;??
  408. ????????st->codec->channel_layout?=??ic?->streams[audiostream]?->codec->channel_layout;??
  409. ????????st->codec->frame_size?????=??ic?->streams[audiostream]?->codec->frame_size;??
  410. ????????st->codec->sample_rate????????=??ic?->streams[audiostream]?->codec->sample_rate;??
  411. ????????st->codec->channels???????????=??ic?->streams[audiostream]?->codec->channels;??????
  412. ????????st->codec->block_align????????=??ic?->streams[audiostream]?->codec->block_align;???
  413. ????????st->time_base.den????????????=??ic?->streams[audiostream]?->time_base.den;??
  414. ????????st->time_base.num????????????=??ic?->streams[audiostream]?->time_base.num;??
  415. ????????st->stream_copy??????????????=??1;??
  416. ????????st->pts.den??????????????????=??ic?->streams[audiostream]?->time_base.den;??
  417. ????????st->pts.num??????????????????=??ic?->streams[audiostream]?->time_base.num;??
  418. ???????? if (?oc->oformat->flags?&?AVFMT_GLOBALHEADER)??
  419. ????????????st?->codec->flags?|=?CODEC_FLAG_GLOBAL_HEADER;??
  420. ???????? if (av_q2d(ic?->streams[audiostream]?->codec->time_base)*ic?->streams[audiostream]?->codec->ticks_per_frame?>?av_q2d(ic?->streams[audiostream]->time_base)?&&???
  421. ????????????av_q2d(ic?->streams[audiostream]->time_base)?<?1.0/1000)??
  422. ????????{??
  423. ????????????st->codec->time_base?=?ic?->streams[audiostream]?->codec->time_base;??
  424. ????????????st->codec->time_base.num?*=?ic?->streams[audiostream]?->codec->ticks_per_frame;??
  425. ????????}??
  426. ???????? else ??
  427. ????????{??
  428. ????????????st->codec->time_base?=?ic?->streams[audiostream]?->time_base;??
  429. ????????}??
  430. ????}??
  431. ???? /*?set?the?output?parameters?(must?be?done?even?if?no?parameters).?*/ ??
  432. ???? //AVFormatParameters?params,?*ap?=??ms; ??
  433. ???? //memset(ap,?0,?sizeof(*ap)); ??
  434. ???? if ?(av_set_parameters(oc,?NULL /*ap*/ )?<?0)??
  435. ????{??
  436. ????????printf( "invalid?output?format?parameters.\n" );??
  437. ???????? return ?-5;??
  438. ????}??
  439. ????oc?->flags?|=?AVFMT_FLAG_NONBLOCK;??
  440. ???? /*******************************************init?output?contents?end**********************************************************/ ??
  441. ??
  442. ???? /*?open?the?output?file,?if?needed?*/ ??
  443. ???? if ?(!(oc?->oformat?->flags?&?AVFMT_NOFILE))???
  444. ????{??
  445. ???????? try ??
  446. ????????{??
  447. ???????????? if ?(url_fopen(&oc->pb,?ofile,?URL_WRONLY)?<?0)???
  448. ????????????{??
  449. ????????????????printf( "Could?not?open?file.\n" );??
  450. ???????????????? return ?-6;??
  451. ????????????}??
  452. ????????}??
  453. ???????? catch (...)??
  454. ????????{??
  455. ????????????printf( "Could?not?open?file.\n" );??
  456. ???????????? return ?-6;??
  457. ????????}??
  458. ????}??
  459. ??
  460. ???? /*?write?the?stream?header,?if?any?*/ ??
  461. ???? if (?0?!=?av_write_header(oc))??
  462. ????{??
  463. ????????printf( "write?the?stream?header?failed.\n" );??
  464. ???????? return ?-7;??
  465. ????}??
  466. ??
  467. ???? return ?0;??
  468. }??

ffmpeg API錄制rtsp視頻流


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