How to segment seek in dynamic pipeline

[xmufzy]

Hello, I'm a newbie for Gstreamer
I need implement a pipeline for join server segment of video to one file,
the pipeline like this


Stage0:

pipeline:
filesrc(backgroup.mp4) --> qtdemux --> h264dec --> queue --> x264enc -->
filesink

```cpp
g_assert(gst_element_seek (demux_bg,
                  1.0, GST_FORMAT_TIME,
                  GstSeekFlags(GST_SEEK_FLAG_ACCURATE| GST_SEEK_FLAG_SEGMENT
|GST_SEEK_FLAG_FLUSH| GST_SEEK_FLAG_TRICKMODE),
                  GST_SEEK_TYPE_SET,  3 * GST_SECOND,
                  GST_SEEK_TYPE_SET, (3
+g_elements.stage_dua[0])*GST_SECOND)==true);
```

Stage1:

pipeline change  :
filesrc(backgroup.mp4) --> qtdemux --> h264dec --> queue --\
                                                            --> mixer -->
x264enc --> filesink
filesrc(fga.mp4) --> qtdemux --> h264dec -->queue ---------/

```cpp
g_assert(gst_element_seek (g_elements.demux_bg,
                  1.0, GST_FORMAT_TIME,
                  GstSeekFlags(GST_SEEK_FLAG_ACCURATE |
GST_SEEK_FLAG_SEGMENT| GST_SEEK_FLAG_TRICKMODE),
                  GST_SEEK_TYPE_SET, 5 * GST_SECOND,
                  GST_SEEK_TYPE_SET, (5+g_elements.stage_dua[1]) *
GST_SECOND)==true);
g_assert(gst_element_seek (g_elements.demux_fga,
                  1.0, GST_FORMAT_TIME,
                  GstSeekFlags(GST_SEEK_FLAG_ACCURATE|
GST_SEEK_FLAG_SEGMENT| GST_SEEK_FLAG_TRICKMODE),
                  GST_SEEK_TYPE_SET,  1 * GST_SECOND,
                  GST_SEEK_TYPE_SET, (1+g_elements.stage_dua[1]) *
GST_SECOND)==true);
```
Stage2:
pipeline change  :

filesrc(backgroup.mp4) --> qtdemux --> h264dec --> queue --\
                                                            --> mixer -->
x264enc --> filesink
filesrc(fga.mp4) --> qtdemux --> h264dec -->queue ---------//
filesrc(fgb.mp4) --> qtdemux --> h264dec -->queue ---------/

```cpp
g_assert(gst_element_seek (g_elements.demux_bg,
                  1.0, GST_FORMAT_TIME,
                  GstSeekFlags(GST_SEEK_FLAG_ACCURATE
|GST_SEEK_FLAG_SEGMENT| GST_SEEK_FLAG_TRICKMODE),
                  GST_SEEK_TYPE_SET,  2 * GST_SECOND,

                  GST_SEEK_TYPE_SET, (2+g_elements.stage_dua[2]) *
GST_SECOND)==true);
g_assert(gst_element_seek (g_elements.demux_fga,
                  1.0, GST_FORMAT_TIME,
                  GstSeekFlags(GST_SEEK_FLAG_ACCURATE
|GST_SEEK_FLAG_SEGMENT| GST_SEEK_FLAG_TRICKMODE),
                  GST_SEEK_TYPE_SET, 6 * GST_SECOND,
                  GST_SEEK_TYPE_SET, (6+g_elements.stage_dua[2]) *
GST_SECOND)==true);
g_assert(gst_element_seek (g_elements.demux_shoe,
                  1.0, GST_FORMAT_TIME,
                  GstSeekFlags(GST_SEEK_FLAG_ACCURATE| GST_SEEK_FLAG_SEGMENT
|  GST_SEEK_FLAG_TRICKMODE),
                  GST_SEEK_TYPE_SET, 9 * GST_SECOND,
                  GST_SEEK_TYPE_SET, (9+g_elements.stage_dua[2]) *
GST_SECOND)==true);


The pipeline can't work.

Thank you.



--
Sent from: http://gstreamer-devel.966125.n4.nabble.com/