Gstreamer-常用pad模板定义

相关连接：https://blog.csdn.net/knowledgebao/article/details/84621238

---

常见CAP整理：

audio裸流：

audio-mp3：

audio-AAC:

audio-alaw（g711a,pcma）:

audio-mulaw（g711u,pcmu）:

video裸流：

video-h264:

video-h265:

---

寻找方法：

1. gstreamer帮助文档，详见参考资料1
2. 参考iana官网，详见参考资料2
3. 参考别人写好的，详见参考资料3
4. 趴源码，详见参看资料4，下载源码寻找即可。

常见CAP整理：

audio裸流：

GST_STATIC_CAPS(
    "audio/x-raw, "
    "format = (string)S16LE, "
    "rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, "
    "channels = (int){1,2};"
)

audio-mp3：

GST_STATIC_CAPS(
    "audio/mpeg, "
    "mpegversion = (int) 1, "
    "layer = (int) [ 1, 3 ], "
    "rate = (int) { 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000 }, "
    "channels = (int){1,2};"
)

audio-AAC:

GST_STATIC_CAPS(
    "audio/mpeg, "
    "mpegversion = (int) { 2, 4 }, "
    "framed = (bool) false, "
    "format = (string)S16LE, "
    "rate = (int) { 8000, 11025, 22050, 44100, 48000, 96000 }, "
    "channels = (int){1,2};"
)

audio-alaw（g711a,pcma）:

GST_STATIC_CAPS(
    "audio/x-alaw, "
    "rate = (int) 8000, "
    "channels = (int) 1;"
)

audio-mulaw（g711u,pcmu）:

GST_STATIC_CAPS(
    "audio/x-mulaw, "
    "rate = (int) 8000, "
    "channels = (int) 1;"
)

video裸流：

GST_STATIC_CAPS(
    "video/x-raw, "
    "format=(string){ Y444, Y42B, I420, YV12, NV12 }, "
    "width = (int) [128,4096], "
    "height = (int) [128,2160], "
    "framerate = (fraction) [ 15, 60 ] ;"
)

video-h264:

GST_STATIC_CAPS(
    "video/x-h264, "
    "width = (int) [128,4096], "
    "height = (int) [128,2160], "
    "profile=(string){ high-4:4:4, high-4:2:2, high-10, high, main, baseline, constrained-baseline, high-4:4:4-intra, high-4:2:2-intra, high-10-intra }, "
    "stream-format = byte-stream, "
    "framerate = (fraction) [ 15, 60 ] ;"
)

video-h265:

GST_STATIC_CAPS(
    "video/x-h265, "
    "width = (int) [128,4096], "
    "height = (int) [128,2160], "
    "profile=(string){ high-4:4:4, high-4:2:2, high-10, high, main, baseline, constrained-baseline, high-4:4:4-intra, high-4:2:2-intra, high-10-intra }, "
    "stream-format = byte-stream, "
    "framerate = (fraction) [ 15, 60 ] ;"
)

 

 

 

---

参考资料：

1，https://gstreamer.freedesktop.org/documentation/plugin-development/advanced/media-types.html

2,  https://www.iana.org/assignments/media-types/media-types.xhtml

3,  https://gstreamer.freedesktop.org/documentation/plugins.html

4, gst-plugins-base-1.14.2\gst\typefind\gsttypefindfunctions.c

---

有任何疑问，请联系：[email protected]