white-haired-uncle
commented
1 year ago This is the output from mpv on the original recording. The errors disappear as soon as I run it through ffmpeg/transcode.
spartan$ mpv /export/video2/2623_20230807040000.ts
[ffmpeg/demuxer] mpegts: PES packet size mismatch
[ffmpeg/demuxer] mpegts: Packet corrupt (stream = 1, dts = 4709425295).
(+) Video --vid=1 (mpeg2video 720x480 29.970fps)
(+) Audio --aid=1 --alang=eng (ac3 2ch 48000Hz)
(+) Video --vid=1 (mpeg2video 720x480 29.970fps)
(+) Audio --aid=1 --alang=eng (ac3 2ch 48000Hz)
Subs --sid=1 (*) (eia_608)
AO: [pulse] 48000Hz stereo 2ch float
VO: [gpu] 720x480 => 853x480 yuv420p
AV: 00:00:01 / 00:59:56 (0%) A-V: 0.000 Dropped: 6 Cache: 172s/47MB
[ffmpeg/demuxer] mpegts: Packet corrupt (stream = 0, dts = 4401631130).
[ffmpeg/demuxer] mpegts: PES packet size mismatch
[ffmpeg/demuxer] mpegts: Packet corrupt (stream = 1, dts = 4401582095).
AV: 00:00:08 / 00:59:56 (0%) A-V: 0.000 Dropped: 28 Cache: 544s/150MB
Track switched:
(+) Video --vid=1 (mpeg2video 720x480 29.970fps)
(+) Audio --aid=1 --alang=eng (ac3 2ch 48000Hz)
(+) Subs --sid=1 (*) (eia_608)
AV: 00:00:09 / 00:59:56 (0%) A-V: 0.000 Dropped: 36 Cache: 160s/43MB
[ffmpeg/demuxer] mpegts: Packet corrupt (stream = 0, dts = 4401631130).
[ffmpeg/demuxer] mpegts: PES packet size mismatch
[ffmpeg/demuxer] mpegts: Packet corrupt (stream = 1, dts = 4401582095).
And the processed file
spartan$ mpv /export/share/video/2623_20230807040000-30sec.mp4
(+) Video --vid=1 (mpeg2video 720x480 29.970fps)
(+) Audio --aid=1 (ac3 2ch 48000Hz)
AO: [pulse] 48000Hz stereo 2ch float
VO: [gpu] 720x480 => 853x480 yuv420p
(+) Video --vid=1 (mpeg2video 720x480 29.970fps)
(+) Audio --aid=1 (ac3 2ch 48000Hz)
Subs --sid=1 (*) (eia_608)
AV: 00:00:04 / 00:00:30 (14%) A-V: 0.000 Cache: 25s/7MB
Track switched:
(+) Video --vid=1 (mpeg2video 720x480 29.970fps)
(+) Audio --aid=1 (ac3 2ch 48000Hz)
(+) Subs --sid=1 (*) (eia_608)
AV: 00:00:29 / 00:00:30 (100%) A-V: 0.000 Dropped: 22 Cache: 0.0s
billmeek
BrettLMiller
mythbackend: Linux mythbackend 5.19.0-38-generic #39~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Fri Mar 17 21:16:15 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
mythfrontend: Linux spartan 5.15.0-73-generic #80-Ubuntu SMP Mon May 15 15:18:26 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
$ mythbackend --version Please attach all output as a file in bug reports. MythTV Version : v33.1+fixes.202303140136.7f288be61b~ubuntu22.04.1 MythTV Branch : fixes/33 Network Protocol : 91 Library API : 33.20220913-1 QT Version : 5.15.3 Options compiled in: linux profile use_hidesyms using_alsa using_oss using_pulse using_pulseoutput using_backend using_bindings_perl using_bindings_python using_bindings_php using_dvb using_firewire using_frontend using_hdhomerun using_satip using_vbox using_ceton using_joystick_menu using_libcec using_libcrypto using_gnutls using_libdns_sd using_libxml2 using_lirc using_mheg using_opengl using_egl using_qtwebkit using_qtscript using_qtdbus using_taglib using_v4l2 using_v4l2prime using_x11 using_system_libbluray using_system_libudfread using_systemd_notify using_systemd_journal using_drm using_bindings_perl using_bindings_python using_bindings_php using_freetype2 using_mythtranscode using_opengl using_egl using_drm using_vaapi using_nvdec using_vdpau using_ffmpeg_threads using_mheg using_libass using_libxml2 using_libmp3lame
spartan$ mythfrontend --version Please attach all output as a file in bug reports. MythTV Version : v33.1-18-g21d2d9d951 MythTV Branch : fixes/33 Network Protocol : 91 Library API : 33.20220913-1 QT Version : 5.15.3 Options compiled in: linux profile use_hidesyms using_alsa using_oss using_pulse using_pulseoutput using_backend using_bindings_perl using_bindings_python using_bindings_php using_dvb using_firewire using_frontend using_hdhomerun using_satip using_vbox using_ceton using_joystick_menu using_libcec using_libcrypto using_gnutls using_libdns_sd using_libxml2 using_lirc using_mheg using_opengl using_egl using_qtwebkit using_qtscript using_qtdbus using_taglib using_v4l2 using_v4l2prime using_x11 using_system_libbluray using_system_libudfread using_systemd_notify using_systemd_journal using_drm using_bindings_perl using_bindings_python using_bindings_php using_freetype2 using_mythtranscode using_opengl using_egl using_drm using_vaapi using_nvdec using_vdpau using_ffmpeg_threads using_mheg using_libass using_libxml2
As the episode begins, CC says "No!" three times, each a second or so too early (you have to watch carefully, the first one only lasts for an instant). A few seconds later, the CC seems to sync with the dialog but then it gets out of sync again.
vlc/mpv show the CC as the actors speak, with the exception of "I didn't see this..." which is a bit early (not as much as myth).
Unfortunately, I had to really hack this down to fit in the file size limit. Another minute or so would show CC going in an out of sync, sometimes much worse than this example.
Attached file was from HDHR, run through mythtranscode lossless-only profile (which made it a little less noticable), then ffmpeg -i foo.mpg -to 0:00:30 -o foo2.mpg. Renamed to mp4 for upload.
https://github.com/MythTV/mythtv/assets/135195815/ce8607e7-eb38-441f-9802-9ead70f45c04
Ref: https://forum.mythtv.org/viewtopic.php?f=36&t=5479