| 2305 | } |
| 2306 | |
| 2307 | static void compute_frame_duration( hb_work_private_t *pv ) |
| 2308 | { |
| 2309 | int64_t max_fps = 256LL; |
| 2310 | int64_t min_fps = 8LL; |
| 2311 | double duration = 0.; |
| 2312 | |
| 2313 | // context->time_base may be in fields, so set the max *fields* per second |
| 2314 | const AVCodecDescriptor *desc = avcodec_descriptor_get(pv->context->codec_id); |
| 2315 | int ticks_per_frame = desc && (desc->props & AV_CODEC_PROP_FIELDS) ? 2 : 1; |
| 2316 | |
| 2317 | if (pv->title->opaque_priv) |
| 2318 | { |
| 2319 | // If ffmpeg is demuxing for us, it collects some additional |
| 2320 | // information about framerates that is often accurate |
| 2321 | AVFormatContext *ic = (AVFormatContext*)pv->title->opaque_priv; |
| 2322 | AVStream *st = ic->streams[pv->title->video_id]; |
| 2323 | if (st->nb_frames && st->duration > 0) |
| 2324 | { |
| 2325 | // compute the average frame duration from the total number |
| 2326 | // of frames & the total duration. |
| 2327 | duration = ( (double)st->duration * (double)st->time_base.num ) / |
| 2328 | ( (double)st->nb_frames * (double)st->time_base.den ); |
| 2329 | } |
| 2330 | else |
| 2331 | { |
| 2332 | AVRational *tb = NULL; |
| 2333 | // We don't have a frame count or duration so try to use the |
| 2334 | // far less reliable avg_frame_rate info in the stream. |
| 2335 | if (st->avg_frame_rate.den && st->avg_frame_rate.num) |
| 2336 | { |
| 2337 | tb = &(st->avg_frame_rate); |
| 2338 | } |
| 2339 | // Try r_frame_rate, which is usually set for cfr streams |
| 2340 | else if (st->r_frame_rate.num && st->r_frame_rate.den) |
| 2341 | { |
| 2342 | tb = &(st->r_frame_rate); |
| 2343 | } |
| 2344 | // Because the time bases are so screwed up, we only take values |
| 2345 | // in a restricted range. |
| 2346 | else if (st->time_base.num * max_fps > st->time_base.den && |
| 2347 | st->time_base.den > st->time_base.num * min_fps) |
| 2348 | { |
| 2349 | tb = &(st->time_base); |
| 2350 | } |
| 2351 | |
| 2352 | if (tb != NULL) |
| 2353 | { |
| 2354 | duration = (double)tb->den / (double)tb->num; |
| 2355 | } |
| 2356 | } |
| 2357 | } |
| 2358 | else if (pv->context->framerate.num && pv->context->framerate.den) |
| 2359 | { |
| 2360 | duration = (double)pv->context->framerate.den / (double)pv->context->framerate.num; |
| 2361 | } |
| 2362 | |
| 2363 | int clock_min, clock_max, clock; |
| 2364 | hb_video_framerate_get_limits(&clock_min, &clock_max, &clock); |
no test coverage detected