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#13334 (Improved Video timing and Synchronization) – MythTV
https://code.mythtv.org/trac/ticket/13334#:~:text=The%20MythTV%20frontend%20AVSync%20process%20assumes%20that%20video,is%20more%20than%20three%20frames%20out%20of%20sync.
MythTV audio/video out of sync (audio ahead ~500ms) since ...
https://superuser.com/questions/200362/mythtv-audio-video-out-of-sync-audio-ahead-500ms-since-upgrade-to-lucid
MythTV version: 0.23.0+fixes24158-0ubuntu2. Audio output: ALSA:default. PulseAudio is running and shows mythtv as a client, but setting audio output to ALSA:plughw:0 does not help and, in fact, seems to cause video to play at about half speed and keep abruptly catching up to real time.
Synchronizing Sound - MythTV Official Wiki
https://www.mythtv.org/wiki/Synchronizing_Sound
Sound Synchronisation quirks for specific cards. Sound sync in general is covered in many other places. This page is for specific cases where the instructions don't work! Leadtek Winfast TV 2000 and a SB Live. You need to setup the mixer to record from both line in, and capture. You need to have line in muted, and pcm unmuted.
Configuring Digital Sound - MythTV Official Wiki
https://www.mythtv.org/wiki/Configuring_Digital_Sound
If you have an optical interconnect between your MythTV frontend and your amplifier it may help reduce ground-loop hum though. On the other hand, this technique may introduce a time lag that causes your audio to be out of sync with the video when you watch TV. Backing up your mixer settings
Audio/Video sync problems especially ... - code.mythtv.org
https://code.mythtv.org/trac/ticket/10797
Audio/Video sync problems especially after seeking to start of recording. ... I've upgraded from MythTV 0.23 to 0.25 and I'm seeing the issue on existing as well as new DVB-S MPEG-2 recordings with MP2 audio. ... The A/V sync will now be …
Sound Troubleshooting - MythTV Official Wiki
https://www.mythtv.org/wiki/Sound_Troubleshooting
No sound from mythtv, but mplayer can play sound. Seen on Fedora 12 to 13 + MythTV 0.22 to 0.23, with analog sound: Fixed by setting mixer control to Master and entering ALSA:front as audio device. ALSA:front was not in the list of audio devices so it had to be entered manually with the onscreen keyboard. Mixer control is PCM by default. ALSA ...
#13334 (Improved Video timing and Synchronization) – MythTV
https://code.mythtv.org/trac/ticket/13334
Enable the new sync method as follows. frontend -> Setup -> Video -> Playback -> Advanced Playback Settings -> Enable new timestamp based playback speed (AVSync2) . Zoom into that setting to get to AVSync2 audio correction (ms) . The audio correction should be set smaller for smoother audio correction or bigger for faster audio correction.
video - FFMPEG Cutting Commercials puts audio out of …
https://stackoverflow.com/questions/25771640/ffmpeg-cutting-commercials-puts-audio-out-of-sync
Mythroku and Plex both are out of sync when playing the file. The MythTV Frontend player actually does play it correctly, and I can hear the "hitch" as it syncs the audio. After hours of reading posts and playing with settings, I've got it down to this: If I say: ffmpeg -i $file -acodec copy -vcodec copy -f mp4 -ss 0 -t <anything> out.mp4
User Manual:TV Settings - MythTV Official Wiki
https://www.mythtv.org/wiki/User_Manual:TV_Settings
If you do have a correctly configured sound card and use the PVR350 decoder for TV out, Myth will not give a popup message regardless of the setting of the PVR350InternalAudioOnly option. However, the sound will go out the PVR350's line out and not to the sound card. You can loop the sound from the PVR350's line-out to your sound card's line-in.
#11729 (video play double speed (too fast), audio ... - MythTV
https://code.mythtv.org/trac/ticket/11729
GT 610 - video way fast and out of sync with audio within Myth TV using open source drivers. Video playback is perfect with other video apps - it is only ONLY MythTV that is misbehaving. comment:13 Changed 8 years ago by sherif.onion@…
VDPAU - MythTV Official Wiki
https://www.mythtv.org/wiki/VDPAU
Temporal 1x HW and One Field are the only deinterlacers that don't cause jerky picture and out of sync audio. All h264 test files from HD Playback Reports are nice and smooth. Asus EN8400GS Silent PCIe (G98 chipset, 500MHz Core/333Mhz Mem) 256mb 180.53 Temporal 1x HW 0.22 OTA HDTV (1080i & 720p) default default mwm 1080p Yes
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