On Thu, Jul 11, 2019 at 09:54:29AM +0800, lance.lmw...@gmail.com wrote: > From: Limin Wang <lmw...@bravovcloud.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. > > Have passed "make fate SAMPLES=fate-suite" with mpeg2-ticket186 ref data is > updated. > > Reviewed-by: Michael Niedermayer <mich...@niedermayer.cc> I have not really reviewed this this: ./ffmpeg -i fate-suite/h264/h264_intra_first-small.ts -bitexact -an -t 1 -f framecrc - produces empty output after the patch but before it produces 14 frames Thanks [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Those who are best at talking, realize last or never when they are wrong.
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