Question

我是gstreamer的新手。我想只在rtp端口上传输音频/视频。我尝试使用以下命令仅从mpeg文件中流式传输视频：

    $ gst-launch-1.0 -v rtpbin name=rtpbin filesrc location=KRSNA.mpg ! decodebin ! 'video/mpeg' ! rtpmpvpay ! udpsink host=127.0.0.1 port=9078

以下是命令的详细信息：

Setting pipeline to PAUSED ...
Pipeline is PREROLLING  ...
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src: caps = video/mpeg, systemstream=(boolean)true, mpegversion=(int)1
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src: caps = video/mpeg, systemstream=(boolean)true, mpegversion=(int)1
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMpegPSDemux:mpegpsdemux0.GstPad:sink: caps = video/mpeg, systemstream=(boolean)true, mpegversion=(int)1
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0.GstPad:sink_0: caps = video/mpeg, mpegversion=(int)1, systemstream=(boolean)false
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0.GstPad:sink_0: caps = video/mpeg, mpegversion=(int)1, systemstream=(boolean)false
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMpegvParse:mpegvparse0.GstPad:sink: caps = video/mpeg, mpegversion=(int)1, systemstream=(boolean)false
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0.GstPad:sink_1: caps = audio/mpeg, mpegversion=(int)1
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0.GstPad:sink_1: caps = audio/mpeg, mpegversion=(int)1
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0.GstPad:sink_1: caps = audio/mpeg, mpegversion=(int)1
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMpegAudioParse:mpegaudioparse0.GstPad:src: caps = audio/mpeg, mpegversion=(int)1, mpegaudioversion=(int)1, layer=(int)2, rate=(int)48000, channels=(int)2, parsed=(boolean)true
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMpg123AudioDec:mpg123audiodec0.GstPad:sink: caps = audio/mpeg, mpegversion=(int)1, mpegaudioversion=(int)1, layer=(int)2, rate=(int)48000, channels=(int)2, parsed=(boolean)true
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMpegvParse:mpegvparse0.GstPad:src: caps = video/mpeg, mpegversion=(int)1, systemstream=(boolean)false, parsed=(boolean)true, width=(int)720, height=(int)576, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)16/15, codec_data=(buffer)000001b32d0240830c352398
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/avdec_mpeg2video:avdec_mpeg2video0.GstPad:sink: caps = video/mpeg, mpegversion=(int)1, systemstream=(boolean)false, parsed=(boolean)true, width=(int)720, height=(int)576, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)16/15, codec_data=(buffer)000001b32d0240830c352398
Redistribute latency...
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMpg123AudioDec:mpg123audiodec0.GstPad:src: caps = audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int)48000, channels=(int)2, channel-mask=(bitmask)0x0000000000000003
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/avdec_mpeg2video:avdec_mpeg2video0.GstPad:src: caps = video/x-raw, format=(string)I420, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)16/15, interlace-mode=(string)progressive, colorimetry=(string)bt601, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-buffers = 5
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-time = 0
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-bytes = 2097152
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-buffers = 5
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-time = 0
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMultiQueue:multiqueue0: max-size-bytes = 2097152
/GstPipeline:pipeline0/GstCapsFilter:capsfilter1: caps = video/mpeg
/GstPipeline:pipeline0/GstCapsFilter:capsfilter2: caps = video/mpeg
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMpg123AudioDec:mpg123audiodec0.GstPad:src: caps = audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int)48000, channels=(int)2, channel-mask=(bitmask)0x0000000000000003
/GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstDecodePad:src_1: caps = audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int)48000, channels=(int)2, channel-mask=(bitmask)0x0000000000000003
/GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstDecodePad:src_1.GstProxyPad:proxypad8: caps = audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int)48000, channels=(int)2, channel-mask=(bitmask)0x0000000000000003
/GstPipeline:pipeline0/GstDecodeBin:decodebin0/avdec_mpeg2video:avdec_mpeg2video0.GstPad:src: caps = video/x-raw, format=(string)I420, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)16/15, interlace-mode=(string)progressive, colorimetry=(string)bt601, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstDecodePad:src_0: caps = video/x-raw, format=(string)I420, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)16/15, interlace-mode=(string)progressive, colorimetry=(string)bt601, framerate=(fraction)25/1
/GstPipeline:pipeline0/GstDecodeBin:decodebin0.GstDecodePad:src_0.GstProxyPad:proxypad9: caps = video/x-raw, format=(string)I420, width=(int)720, height=(int)576, pixel-aspect-ratio=(fraction)16/15, interlace-mode=(string)progressive, colorimetry=(string)bt601, framerate=(fraction)25/1
ERROR: from element /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMpegPSDemux:mpegpsdemux0: Internal data stream error.
Additional debug info:
gstmpegdemux.c(2871): gst_flups_demux_loop (): /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstMpegPSDemux:mpegpsdemux0:
stream stopped, reason not-linked
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

如何使用gstreamer从mpeg文件中仅传输音频/视频？

任何帮助/指针appriciated ...

Answer 1

请尽量不要使用decodebin。使用兼容的demuxer元素，然后使用所需的解析器和解码器元素。

如果要从容器格式中运行基本（仅视频/仅音频），请使用所需的元素（音频流的视频流/音频元素的视频元素）。

gst-launch-0.10  filesrc  location=sample.mkv ! matroskademux ! h264parse ! ffdec_h264 ! ffmpegcolorspace ! autovideosink

例如，上述语句将使视频输出忽略音频，同样可以实现音频。

希望这有帮助，也看here

Answer 2

gst-launch-0.10 filesrc location=c:/test.mpg ! mpegpsdemux ! mpegvideoparse ! mpeg2dec ! rtpvrawpay ! udpsink port=9078

这个管道对我有用，虽然我不得不用mpegpsdemux代替tsdemux，因为我只安装了前者。

如何使用gstreamer从mpeg文件中仅传输音频/视频？

2 个答案: