在deepstream中使用mp4文件,与rtsp类似,使用uridecodebin即可,(可见官方test.py文件)
c
def create_source_bin(index, uri):
print("Creating source bin")
# Create a source GstBin to abstract this bin's content from the rest of the
# pipeline
bin_name = "source-bin-%02d" % index
print(bin_name)
nbin = Gst.Bin.new(bin_name)
if not nbin:
sys.stderr.write(" Unable to create source bin \n")
# Source element for reading from the uri.
# We will use decodebin and let it figure out the container format of the
# stream and the codec and plug the appropriate demux and decode plugins.
uri_decode_bin = Gst.ElementFactory.make("uridecodebin", "uri-decode-bin")
if not uri_decode_bin:
sys.stderr.write(" Unable to create uri decode bin \n")
# We set the input uri to the source element
uri_decode_bin.set_property("uri", uri)
# Connect to the "pad-added" signal of the decodebin which generates a
# callback once a new pad for raw data has beed created by the decodebin
uri_decode_bin.connect("pad-added", cb_newpad, nbin)
uri_decode_bin.connect("child-added", decodebin_child_added, nbin)
# We need to create a ghost pad for the source bin which will act as a proxy
# for the video decoder src pad. The ghost pad will not have a target right
# now. Once the decode bin creates the video decoder and generates the
# cb_newpad callback, we will set the ghost pad target to the video decoder
# src pad.
Gst.Bin.add(nbin, uri_decode_bin)
bin_pad = nbin.add_pad(
Gst.GhostPad.new_no_target(
"src", Gst.PadDirection.SRC))
if not bin_pad:
sys.stderr.write(" Failed to add ghost pad in source bin \n")
return None
return nbin
1、错误:
Error: gst-resource-error-quark: Invalid URI "/home/打码/打码.mp4". (3): gsturidecodebin.c(1383): gen_source_element (): /GstPipeline:pipeline0/GstBin:source-bin-03/GstURIDecodeBin:uri-decode-bin
解决方案:
如果是文件系统中的mp4文件,记得加上file://前缀,如将输入设为file:///home/打码/打码.mp4。
2.错误:
Error: gst-stream-error-quark: memory type configured and i/p buffer mismatch ip_surf 2 muxer 3 (1): gstnvstreammux.c(643): gst_nvstreammux_chain (): /GstPipeline:pipeline0/GstNvStreamMux:Stream-muxer
解决方案:
不同类型的输入(如rtsp流和mp4文件)会产生不同的内存类型,为了解决这个问题需要保证连接到streammux的输入产生相同的内存类型(即都是ftsp或者都是mp4)。或者,也可以找到下面的代码:
c
streammux.set_property("nvbuf-memory-type", mem_type)
将其注释掉即可。