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| author | Klaus Schmidinger <vdr@tvdr.de> | 2012-09-18 09:57:38 +0200 |
|---|---|---|
| committer | Klaus Schmidinger <vdr@tvdr.de> | 2012-09-18 09:57:38 +0200 |
| commit | ed456adc80fdc7760805aa08f4d81146d3ec5576 (patch) | |
| tree | c8669bb53687a47389a6a27264b93ded62684e6a | |
| parent | 14eb0d77e9481c24c753f51745bd661fc7644e35 (diff) | |
| download | vdr-ed456adc80fdc7760805aa08f4d81146d3ec5576.tar.gz vdr-ed456adc80fdc7760805aa08f4d81146d3ec5576.tar.bz2 | |
Improved detecting frames in MPEG 4 video
| -rw-r--r-- | CONTRIBUTORS | 6 | ||||
| -rw-r--r-- | HISTORY | 5 | ||||
| -rw-r--r-- | remux.c | 13 |
3 files changed, 15 insertions, 9 deletions
diff --git a/CONTRIBUTORS b/CONTRIBUTORS index 4df88b50..eee034cd 100644 --- a/CONTRIBUTORS +++ b/CONTRIBUTORS @@ -1322,8 +1322,6 @@ Reinhard Nissl <rnissl@gmx.de> for reporting that the Transfer Mode indicator bitmap in the LCARS skin may not fit with small font sizes for reporting a race condition when zapping in transfer mode - for reporting an error in mapping the frame type bits when detecting independent - frames in MPEG 4 video Richard Robson <richard_robson@beeb.net> for reporting freezing replay if a timer starts while in Transfer Mode from the @@ -2944,3 +2942,7 @@ Dennis Bendlin <dennisbendlin@online.de> Oliver Schinagl <oliver@schinagl.nl> for a patch that was used to implement the setup options "OSD/Color key [0123]" + +Andrey Pridvorov <ua0lnj@bk.ru> + for reporting a problem with detecting frames in MPEG 4 video, and pointing towards + a better way of doing it @@ -7235,15 +7235,14 @@ Video Disk Recorder Revision History function in order to make use of this new feature. See, for instance, the function cSkinClassicDisplayMenu::SetButtons() in skinclassic.c for details. -2012-09-17: Version 1.7.31 +2012-09-18: Version 1.7.31 - If regenerating an index file fails and no data is written to the file, VDR now reports this error and removes the empty index file. -- Fixed mapping the frame type bits when detecting independent frames in MPEG 4 - video (reported by Reinhard Nissl). - The setup parameter "Recording/Instant rec. time (min)" can now be set to '0', which means to record only the currently running event (based on a patch from Matti Lehtimäki). - Decreased the ring buffer put/get trigger sizes from 1/3 to 1/10. - The script given to VDR with the '-r' option is now also called whenever a recording is deleted (thanks to Alexander Wenzel). +- Improved detecting frames in MPEG 4 video (reported by Andrey Pridvorov). @@ -4,7 +4,7 @@ * See the main source file 'vdr.c' for copyright information and * how to reach the author. * - * $Id: remux.c 2.65 2012/09/14 09:06:14 kls Exp $ + * $Id: remux.c 2.66 2012/09/18 09:11:24 kls Exp $ */ #include "remux.h" @@ -843,7 +843,8 @@ int cFrameDetector::SkipPackets(const uchar *&Data, int &Length, int &Processed, int cFrameDetector::Analyze(const uchar *Data, int Length) { - int SeenPayloadStart = false; + bool SeenPayloadStart = false; + bool SeenAccessUnitDelimiter = false; int Processed = 0; newFrame = independentFrame = false; while (Length >= TS_SIZE) { @@ -970,12 +971,16 @@ int cFrameDetector::Analyze(const uchar *Data, int Length) scanner = EMPTY_SCANNER; if (synced && !SeenPayloadStart && Processed) return Processed; // flush everything before this new frame + SeenAccessUnitDelimiter = true; + } + else if (SeenAccessUnitDelimiter && scanner == 0x00000001) { // NALU start + SeenAccessUnitDelimiter = false; int FrameTypeOffset = i + 1; if (FrameTypeOffset >= TS_SIZE) // the byte to check is in the next TS packet i = SkipPackets(Data, Length, Processed, FrameTypeOffset); newFrame = true; - uchar FrameType = Data[FrameTypeOffset] & 0xE0; - independentFrame = FrameType == 0x00; + uchar FrameType = Data[FrameTypeOffset] & 0x1F; + independentFrame = FrameType == 0x07; if (synced) { if (framesPerPayloadUnit < 0) { payloadUnitOfFrame = (payloadUnitOfFrame + 1) % -framesPerPayloadUnit; |