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Merge pull request #22145 from danopdev:issues-22141

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Fixed  time value obtained on some frames at the end of the video #22141
This commit is contained in:
Alexander Smorkalov 2022-09-15 19:18:58 +03:00 committed by GitHub
commit a6017ac550
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2 changed files with 25 additions and 6 deletions
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9
modules/videoio/src/cap_ffmpeg_impl.hpp
View File

@ -1518,10 +1518,6 @@ bool CvCapture_FFMPEG::grabFrame()
ret = got_picture ? 0 : -1;
#endif
if (ret >= 0) {
//picture_pts = picture->best_effort_timestamp;
if( picture_pts == AV_NOPTS_VALUE_ )
picture_pts = picture->CV_FFMPEG_PTS_FIELD != AV_NOPTS_VALUE_ && picture->CV_FFMPEG_PTS_FIELD != 0 ? picture->CV_FFMPEG_PTS_FIELD : picture->pkt_dts;
valid = true;
} else if (ret == AVERROR(EAGAIN)) {
continue;
@ -1534,8 +1530,11 @@ bool CvCapture_FFMPEG::grabFrame()
}
}
if (valid)
if (valid) {
if( picture_pts == AV_NOPTS_VALUE_ )
picture_pts = picture->CV_FFMPEG_PTS_FIELD != AV_NOPTS_VALUE_ && picture->CV_FFMPEG_PTS_FIELD != 0 ? picture->CV_FFMPEG_PTS_FIELD : picture->pkt_dts;
frame_number++;
}
if (!rawMode && valid && first_frame_number < 0)
first_frame_number = dts_to_frame_number(picture_pts);

22
modules/videoio/test/test_video_io.cpp
View File

@ -215,8 +215,28 @@ public:
throw SkipTestException(cv::String("Backend ") + cv::videoio_registry::getBackendName(apiPref) +
cv::String(" can't open the video: ") + video_file);
int frame_count = (int)cap.get(CAP_PROP_FRAME_COUNT);
// HACK: Video consists of 125 frames, but cv::VideoCapture with FFmpeg reports only 122 frames for mpg video.
// mpg file reports 5.08 sec * 24 fps => property returns 122 frames,but actual number of frames returned is 125
// HACK: CAP_PROP_FRAME_COUNT is not supported for vmw + MSMF. Just force check for all 125 frames
if (ext == "mpg")
EXPECT_GT(frame_count, 121);
else if ((ext == "wmv") && (apiPref == CAP_MSMF))
frame_count = 125;
else
EXPECT_EQ(frame_count, 125);
Mat img;
for(int i = 0; i < 10; i++)
#ifdef _WIN32 // handle old FFmpeg wrapper on Windows till rebuild
frame_count = 10;
#else
// HACK: FFmpeg reports picture_pts = AV_NOPTS_VALUE_ for the last frame for AVI container by some reason
if ((ext == "avi") && (apiPref == CAP_FFMPEG))
frame_count--;
#endif
for (int i = 0; i < frame_count; i++)
{
double timestamp = 0;
ASSERT_NO_THROW(cap >> img);