On Mon, Jul 08, 2019 at 06:34:12PM +0800, lance.lmw...@gmail.com wrote: > From: Limin Wang <lance.lmw...@gmail.com> > > How to reproduce the problem(use two ts files with audio stream): > ffmpeg -i left_w_a.ts -i right_w_a.ts -filter_complex "hstack=inputs=2" -f > null - > > With above command, the audio stream of the second input will be discarded > default, however the start_time is > initalized from the audio stream, so the old code will try to correct the ts > offset in the condition which will > cause the video frame out of sync and report some dts error like below: > [null @ 0x7fa78c000c00] Application provided invalid, non monotonically > increasing dts to muxer in stream 0: 43 >= 43 > [null @ 0x7fa78c000c00] Application provided invalid, non monotonically > increasing dts to muxer in stream 0: 44 >= 44 > [null @ 0x7fa78c000c00] Application provided invalid, non monotonically > increasing dts to muxer in stream 0: 45 >= 45 > [null @ 0x7fa78c000c00] Application provided invalid, non monotonically > increasing dts to muxer in stream 0: 46 >= 46 > [null @ 0x7fa78c000c00] Application provided invalid, non monotonically > increasing dts to muxer in stream 0: 47 >= 47 > > Or you can try with below command to reproduce the issue: > ffmpeg -i input_w_a.ts -i input_w_a.ts -filter_complex "ssim=f=ssim.log" -f > null - > > You'll get below ssim result which isn't expected result for the two input is > same, the SSIM should be 1.00000 > SSIM Y:0.777353 (6.523822) U:0.964087 (14.447539) V:0.966739 (14.780661) > All:0.840039 (7.959872) > > With the patch applied, the above testing command can get expected result. > > other solution are: use the setpts=PTS-STARTPTS filter or skip all audio > stream to avoid the timestamp adjustment. > > Signed-off-by: Limin Wang <lance.lmw...@gmail.com> > --- > fftools/ffmpeg.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-)
this breaks fate-mpeg2-ticket186 [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB When you are offended at any man's fault, turn to yourself and study your own failings. Then you will forget your anger. -- Epictetus
signature.asc
Description: PGP signature
_______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
