I have noticed today that when I use ffmpeg 4.0 stable to decode some TS files into y4m or ffv1 it occasionally skips some frames. My input file has all the frames burned into the picture and I am extracting some frames at regular intervals. Sometimes it works just fine without any skipped frames but sometimes it skips one or two frames. I am using the following command to decode my input:
ffmpeg -i input.ts -vsync 0 output.y4m
and I am extracting the frames using:
ffmpeg -ss xxx -i output.y4m -vframes 1 xxx.png
I am substituting xxx with 0, 100, 200, etc and sometimes I see 1-2-3 frame dropped which is very annoying since I am trying to evaluate the PSNR afterwards and this is messing up the whole PSNR/SSIM evaluation.
[EDIT] I have executed the command which @Gyan suggested:
ffmpeg -v 99 -loglevel 99 -i test.ts \ -c:v rawvideo -vsync 0 \ -enc_time_base 1/1000 output.nut &> test.log
And here is the log file test.log