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add FPS information (#12)

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maggievu-pdftron
2021-12-13 17:47:25 -08:00
committed by GitHub
parent eb3579d9a8
commit c8bc8ef4a4
2 changed files with 5 additions and 0 deletions
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4
src/ffprobe-wasm-wrapper.cpp
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@@ -68,6 +68,7 @@ typedef struct FramesResponse {
int gop_size;
int duration;
double time_base;
double avg_frame_rate;
} FramesResponse;
FileInfoResponse get_file_info(std::string filename) {
@@ -195,11 +196,13 @@ FramesResponse get_frames(std::string filename, int timestamp) {
}
AVRational stream_time_base = pFormatContext->streams[video_stream_index]->time_base;
AVRational avg_frame_rate = pFormatContext->streams[video_stream_index]->avg_frame_rate;
// printf("stream_time_base: %d / %d = %.5f\n", stream_time_base.num, stream_time_base.den, av_q2d(stream_time_base));
FramesResponse r;
r.nb_frames = nb_frames;
r.time_base = av_q2d(stream_time_base);
r.avg_frame_rate = av_q2d(avg_frame_rate);
r.duration = pFormatContext->streams[video_stream_index]->duration;
// If the duration value isn't in the stream, get from the FormatContext.
@@ -316,6 +319,7 @@ EMSCRIPTEN_BINDINGS(structs) {
.field("gop_size", &FramesResponse::gop_size)
.field("duration", &FramesResponse::duration)
.field("time_base", &FramesResponse::time_base)
.field("avg_frame_rate", &FramesResponse::avg_frame_rate)
;
function("get_frames", &get_frames);
}