DVBViewer_Filter 3.9.0

DVBViewer Filter 3.9 auto installer by ALPHA TEAM





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Installation



This ZIP file contains the latest version of the DVBViewer Filter (DVB Source) 3.9. It is compatible with



- DVBViewer Pro 3.9.4 or later

- DVBViewer GE 2.5 or later

- TransEdit 3.2 or later.

- TSPlayer 2.0 or later



Store the files PushSource.ax, Register_DVBSource.exe and Unregister_DVBSource.exe in the DVBViewerFilters folder.



Then register the new version by double-clicking the file Register_DVBSource.exe, in order to create resp. update registry entries that enable DVBViewer and other programs to use the DVBViewer Filter. Double-clicking the file Unregister_DVBSource.exe removes these registry entries. Please note: Registering / unregistering filters requires administrator rights!



Changes in version 3.9.0 beta:



• Changed: More tolerant handling of empty transport stream packets not conforming to the ISO specifications. Since they have no impact on playback they are not regarded as discontinuity anymore.



• Changed: More tolerant handling of H.264 sequence parameter set start codes not conforming to the specifications, thus avoiding format detection failure in certain cases.



• Changed: More tolerant handling of gaps in the sequence of video/audio timestamps (applies to live TV/Radio playback only). They are not regarded as discontinuities anymore if the timestamps after the gap still conform to the DirectShow streamtime, thus having no major impact on playback. This avoids unnecessary "PCR/PTS Gap" error messages to the host application including a stop/play response in order to clear the situation.



• Changed: The new default for the DVBViewer Filter setting "Max. Queued Audio (TV/Radio)" is now 0 (previously 700 ms). It switches the over-buffering control off, thus preventing "Graph too late" error messages to the host application including a stop/play response in order to clear the situation. Long term observation suggests that this function caused more problems than it actually solved.



• Added: Flags allowing the host application to configure the DVBViewer Filter for Internet TV playback conditions.



• Added: The DVBViewer Filter restores the last Graph / DVB display mode setting when it is restarted (deciding whether the original DVB PCR/PTS timestamps or the resulting DirectShow timestamps are displayed on the property page).



• Change: In "Graph" display mode (see above) the DVBViewer Filter now displays the DirectShow streamtime (previously the DVB PCR in both display modes), thus providing more insight in the filter graph timing conditions.



• Added: Chroma format display (e.g. 4:2.0 or 4:2:2) as part of the video format line on the property page.



• Added: Two additional options for reference clock selection in a dropdown list replacing the former "Use DVB Clock" checkbox on the property page (applies to live TV/Radio playback only). Please note: The settings of existing and the default for new installations remain unchanged. The following options are available:



(1) Audio Clock: Equals the former "DVB Clock off" setting. Uses the audio renderer clock in non-adaptive mode, which means, audio playback is not adjusted to the broadcaster's clock, so the clocks may gradually drift apart causing playback issues due to buffer over/underrun after some time. The constant audio playback speed avoids pitch changes, however.



(2) DVB Clock: Equals the former "DVB Clock on" setting. Uses a system clock (high resolution multimedia timer) as base, continuously adjusts it to the broadcaster's clock (PCR, program clock reference) and forces the audio renderer to keep pace with it. Avoids clock drifting, but may cause slight (usually almost inaudible) pitch changes.



(3) Adaptive Audio Clock. Uses the audio renderer clock and forces adjustment to the (broadcasted) audio data rate. Avoids clock drifting, but may cause slight pitch changes and audio gaps for a short period after channel switching.



(4) System Clock: Uses a system clock (high resolution multimedia timer) without adjustment to the broadcaster's clock and without forcing audio renderer adjustment. The clocks may gradually drift apart causing playback issues after some time. The constant audio playback speed avoids pitch changes, however.



Please note: The settings requires "Rebuild Playback" to take effect! The reference clock is needed for filter graph synchronization. Which option is the best depends on system preconditions (e.g. the precision of the sound card and mainboard clock) and the DVBViewer setup. Mostly there is no other way but to try which one works best.by ALPHA TEAM

23/2/2015