Single video stream
Filter Graph As shown in Figure 2:
Figure 2 Filter graph of single video stream
Note: Close to the last level of the previous level of Video Rendere, the VIDEOINFOHEADER structure provided by the GetMediaType function requires full, not only including the width, height, the number of pixel positions, but also the size of the BitmapInfoHeader structure (Bisize Specify as sizeof (bitmapInfoHeader), flat number (BIPLANES, specified as 1). If you need a palette, the BitmapInfoHeader data structure is also taken back to the palette data; if it is a 16-bit RGB format, the BitMapInfoHeader data structure is behind the RGB component extracted mask. The code reference is as follows:
VideoInfo mvideoinfo;
ZeromeMory (& MVideoInfo);
MVideoInfo.avgtimePerframe = 333667;
Mvideoinfo.bmiheader.bisize = sizeof (BitmapInfoHead);
MvideoInfo.Bmiheader.biWidth = 352;
MvideoInfo.Bmiheader.biheight = 240;
MVideoInfo.Bmiheader.biBitcount = 16;
MvideoInfo.Bmiheader.Biplanes = 1;
MvideoInfo.Bmiheader.Bicompression = BI_BITFIELDS;
MvideoInfo.Bmiheader.bisizeImage = mvideoinfo.bmiheader.biwidth *
MvideoInfo.Bmiheader.biheight * mvideoinfo.bmiheader.biBitcount / 8;
For (int i = 0; i <3; i ) // important for 16 bit rgb!
{
MvideoInfo.dwbitmasks [i] = bits565 [i];
}
1. Use Filter Graph Manager default reference clock
Note: If there is no Filter in the Filter Graph implements the IReferenceClock interface, the Filter Graph uses the system clock by default as a reference clock.
1.1 Video Sample does not call the timestamp, send out
Phenomenon: Video is played at the fastest speed. Video Renderer does not send a Quality Control message. The flow time is linear.
Msiavsrc.ax (TID 920) 2307: Stream Time: 120000
Msiavsrc.ax (TID 920) 2309: Stream Time: 140000
Msiavsrc.ax (TID 920) 2311: Stream Time: 160000
Msiavsrc.ax (TID 920) 2314: Street Time: 190000
Msiavsrc.ax (TID 920) 2316: Stream Time: 210000
Msiavsrc.ax (TID 920) 2318: Stream Time: 230000
Msiavsrc.ax (TID 920) 2320: Street Time: 250000
......
Msiavsrc.ax (TID 920) 3569: Stream Time: 12740000 (last Sample) 1.2 Video Sample Do not call the timestamp, the gap is sent (analog network blocker)
Phenomenon: Video Plays a meal. Video Renderer does not send a Quality Control message. The blocking of video data streams does not affect the flow time. The flow time is linearly increased, and the time in the gap is reflected in the flow time obtained twice before and after.
Msiavsrc.ax (TID 970) 2385: Street Time: 680000
Msiavsrc.ax (TID 970) 2389: Stream Time: 720000
MsiaVsrc.ax (TID 970) 4390: Sleep (2000) ... (Delivery of video playback)
MsiaVSRC.AX (TID 970) 4391: Stream Time: 20740000 (flow time reflects 2S of Sleep)
Msiavsrc.ax (TID 970) 4393: Street Time: 20760000
Msiavsrc.ax (TID 970) 4395: Street Time: 20780000
......
Msiavsrc.ax (TID 970) 39826: Stream Time: 375090000 (Last Sample)
1.3 Video Sample hits (continuous) timestamps, send out
Phenomenon: Video continuously play. Video Renderer Sends a Quality Control message for feedback control. The flow time is increased, and the flow time difference between the two acquisitions is roughly a frame display time.
Msiavsrc.ax (TID 970) 4105: Street Time: 3600000
Msiavsrc.ax (TID 970) 4106: Quality Control (Famine) Received.
Msiavsrc.ax (TID 970) 4139: Stream Time: 3940000
Msiavsrc.ax (TID 970) 4140: Quality Control (Famine) Received.
Msiavsrc.ax (TID 970) 4171: Street Time: 4260000
MsiaVSRC.AX (TID 970) 4172: Quality Control (Famine) received.
Msiavsrc.ax (TID 970) 4205: Street Time: 4600000
MsiaVSRC.AX (TID 970) 4206: Quality Control (Famine) received.
Msiavsrc.ax (TID 970) 4238: Stream Time: 4930000
MsiaVSRC.AX (TID 970) 4239: Quality Control (Famine) received.
......
Msiavsrc.ax (TID 970) 21922: Street Time: 181770000 (last Sample)
1.4 Video Sample Timing Time Poke (Time Touch, Time Stamp from 0), send out
Phenomenon: Playing is more continuous. Video Renderer Sends a Quality Control message for feedback control. There is a "fast lens" after the timestamp is reset, and the time difference transmitted by the adjacent SAMPLE is smaller (the display time should be a frame image), indicating that the video rendere is returned immediately after receiving SAMPLE, with the fastest speed processing SAMPLE Make the Sample Timestamp to catch the flow time again. Msiavsrc.ax (TID 964) 2133: Street Time: 12280000
Msiavsrc.ax (TID 964) 2165: Stream Time: 12600000
Msiavsrc.ax (TID 964) 2166: RESET TIME STAMP ...
Msiavsrc.ax (TID 964) 2199: Stream Time: 12940000 (Slow time increment)
Msiavsrc.ax (TID 964) 2201: Street Time: 12960000
Msiavsrc.ax (TID 964) 2203: Stream Time: 12980000
Msiavsrc.ax (TID 964) 2205: Stream Time: 13000000
Msiavsrc.ax (TID 964) 2208: Stream Time: 13030000
Msiavsrc.ax (TID 964) 2210: Stream Time: 13050000
Msiavsrc.ax (TID 964) 2212: Street Time: 13070000
Msiavsrc.ax (TID 964) 2214: Stream Time: 13090000
......
MsiaVSRC.AX (TID 964) 17748: Stream Time: 168430000 (last Sample)
1.5 Video Sample Timestamp (Timestam Time A delta), send out
Phenomenon: Playing continuous after waiting for Delta. Video Renderer Sends a Quality Control message for feedback control.
Msiavsrc.ax (TID 848) 821: Street Time: 4167195720000 (random value, this SAMPLE is sent out by Video Renderer)
Msiavsrc.ax (TID 848) 5828: Stream Time: 49940000 (Delta is reflected here)
Msiavsrc.ax (TID 848) 5860: Street Time: 50250000
Msiavsrc.ax (TID 848) 5892: Street Time: 50580000
Msiavsrc.ax (TID 848) 5927: Street Time: 50930000
......
Msiavsrc.ax (TID 848) 22677: Street Time: 218430000 (last Sample)
1.6 Video Sample Timestamp (Timestamp randomly), send out
Phenomenon: It has a quick shot. Video Renderer Sends a Quality Control message for feedback control. During the entire playback process, if the new SAMPLE timestamp is more than flow time, Sample will be blocked by Video Renderer until the flow time reaches the Sample time; if the new Sample time stamp is stagnant, Sample arrives in Video Renderer will be played immediately, so a quick lens is present until the timestream of the Samples cars back the flow time to return to normal speed. In summary, the video stream does not affect the normal operation of the reference clock. Msiavsrc.ax (TID 610) 1774: Street Time: 5590000
Msiavsrc.ax (TID 610) 1807: Street Time: 5930000
Msiavsrc.ax (TID 610) 1808: Add 5 SECOND DELTA ...
Msiavsrc.ax (TID 610) 1841: Stream Time: 6270000 (This Sample is sent out after blocking)
MSIAVSRC.AX (TID 610) 6873: Stream Time: 56590000 (Spending time reaches the timestamp on SAMPLE, continue playing)
Msiavsrc.ax (TID 610) 6906: Street Time: 56920000
Msiavsrc.ax (TID 610) 6940: Stream Time: 57260000
......
Msiavsrc.ax (TID 610) 7440: Stream Time: 62260000
Msiavsrc.ax (TID 610) 7473: Street Time: 62590000
Msiavsrc.ax (TID 610) 7474: Add -3 second Delta ...
Msiavsrc.ax (TID 610) 7508: Stream Time: 62940000 (SAMPLE sent to Video Rendere) with a very fast speed
Msiavsrc.ax (TID 610) 7509: Street Time: 62950000
Msiavsrc.ax (TID 610) 7511: Stream Time: 62970000
Msiavsrc.ax (TID 610) 7512: Stream Time: 62980000
Msiavsrc.ax (TID 610) 7513: Stream Time: 62990000
......
Msiavsrc.ax (TID 610) 7563: Street Time: 63490000
Msiavsrc.ax (TID 610) 7564: Street Time: 63500000
Msiavsrc.ax (TID 610) 7566: Do Not Add Delta ...
Msiavsrc.ax (TID 610) 7566: Stream Time: 63520000
Msiavsrc.ax (TID 610) 7567: Stream Time: 63530000
Msiavsrc.ax (TID 610) 7568: Stream Time: 63540000
Msiavsrc.ax (TID 610) 7570: Street Time: 63560000
......
Msiavsrc.ax (TID 610) 7719: Stream Time: 65050000
Msiavsrc.ax (TID 610) 7721: Street Time: 65070000
Msiavsrc.ax (TID 610) 7722: Street Time: 65080000
Msiavsrc.ax (TID 610) 7746: Stream Time: 65320000 (Sample timestamp finally catching up the flow time)
Msiavsrc.ax (TID 610) 7779: Stream Time: 65650000
......
Msiavsrc.ax (TID 610) 19390: Street Time: 181760000 (last Sample)
1.7 Video Sample hits (continuous) timestamps, gaps send (analog network obstruction)
Phenomenon: Video Plays a meal. Video Renderer Sends a Quality Control message for feedback control. When there is no data, the flow time is still walking; so it is "late" when the next Sample arrives at Video Renderer, so a fast lens will appear.
Msiavsrc.ax (TID 678) 1667: Street Time: 8940000
Msiavsrc.ax (TID 678) 1700: Street Time: 9270000
MsiavSrc.ax (TID 678) 3701: Sleep (2000) ... (at this time, blocking the image on the previous Sample)
Msiavsrc.ax (TID 678) 3702: Stream Time: 29290000 (fast lens)
Msiavsrc.ax (TID 678) 3704: Stream Time: 29310000
Msiavsrc.ax (TID 678) 3706: Stream Time: 29330000
......
Msiavsrc.ax (TID 678) 3762: Stream Time: 29890000
Msiavsrc.ax (TID 678) 3766: Stream Time: 29930000
MsiavSrc.ax (TID 678) 5767: Sleep (2000) ... (at this time, blocking the image on the previous Sample)
Msiavsrc.ax (TID 678) 5768: Stream Time: 49950000 (fast lens)
Msiavsrc.ax (TID 678) 5770: Street Time: 49970000
Msiavsrc.ax (TID 678) 5772: Street Time: 49990000
......
Msiavsrc.ax (TID 678) 38788: Stream Time: 380150000 (last Sample)
2. Filter graph does not use a reference clock
Phenomenon: No matter whether you don't call the timestamp, no matter whether the timestamp is played correctly, the video is played at the fastest speed. And Video Rendere does not send a Quality Control message. If there is a gap-based pause during the Video Sample, the video will also have a gap.
3. Residual (in unconnected state) in Filter Graph) A Audio Renderer
Note: By default, Audio Rendrer is selected for the reference clock for Filter Graph.
Filter Graph is shown in Figure 3:
Figure 3 Single video stream of residual Audio Rendere Filter Graph
The test results are similar to the case where the system clock is used as the reference clock of Filter Graph. summary:
v At any time, the timestamp on Video Sample does not affect the flow time of the filter graph.
v If there is no timestamp on Video Sample, Video Rendrer handles Sample data at the fastest speed; if there is a timestamp, schedule Sample content (video images) is scheduled based on the timestamp and the current flow time. If the timestamp of SAMPLE is superflow, Video Rendrer blocks the Sample, until the flow time reaches the Sample timestamp and starts playback; if the timestamp on the SAMPLE is hysterer, Video Rendere is immediately displayed immediately after the Sample content is displayed. Handling Sample at the fastest speed to chase the timestream timestall as soon as possible.
v Video stream playback process has a Quality Control mechanism; Quality Control message sender is Video Renderer, feedback to the data sending thread to speed up or slow down the data transmission speed, try to improve service quality.
v
If you can get more important conclusions from the above data, please let me tell me Luqiming@263.net.
