我正在尝试将树莓派上的网络摄像头转换为x264，但始终遇到有关“不受支持的配置文件约束基线”的错误。
GST_DEBUG=3 /home/pi/gst-rtsp-server/examples/test-launch "( v4l2src device=/dev/video0 ! videoconvert ! omxh264enc ! h264parse ! rtph264pay name=pay0 )"
stream ready at rtsp://127.0.0.1:8554/test
0:00:03.043939441 10314 0x75c08350 WARN v4l2src gstv4l2src.c:692:gst_v4l2src_query:<v4l2src0> Can't give latency since framerate isn't fixated !
0:00:03.044207251 10314 0x7491de30 FIXME default gstutils.c:3981:gst_pad_create_stream_id_internal:<appsrc1:src> Creating random stream-id, consider implementing a deterministic way of creating a stream-id
0:00:03.044211053 10314 0x7491de60 FIXME default gstutils.c:3981:gst_pad_create_stream_id_internal:<appsrc0:src> Creating random stream-id, consider implementing a deterministic way of creating a stream-id
0:00:03.087901354 10314 0x7491de90 ERROR omxh264enc gstomxh264enc.c:706:gst_omx_h264_enc_set_format:<omxh264enc-omxh264enc0> Unsupported profile constrained-baseline
0:00:03.087992083 10314 0x7491de90 ERROR omxvideoenc gstomxvideoenc.c:2239:gst_omx_video_enc_set_format:<omxh264enc-omxh264enc0> Subclass failed to set the new format
0:00:03.088080988 10314 0x7491de90 WARN videoencoder gstvideoencoder.c:678:gst_video_encoder_setcaps:<omxh264enc-omxh264enc0> rejected caps video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, format=(string)I420, interlace-mode=(string)progressive
0:00:03.092800068 10314 0x7491de90 ERROR omxh264enc gstomxh264enc.c:706:gst_omx_h264_enc_set_format:<omxh264enc-omxh264enc0> Unsupported profile constrained-baseline
0:00:03.092867411 10314 0x7491de90 ERROR omxvideoenc gstomxvideoenc.c:2239:gst_omx_video_enc_set_format:<omxh264enc-omxh264enc0> Subclass failed to set the new format
0:00:03.092942775 10314 0x7491de90 WARN videoencoder gstvideoencoder.c:678:gst_video_encoder_setcaps:<omxh264enc-omxh264enc0> rejected caps video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, format=(string)I420, interlace-mode=(string)progressive
0:00:03.092983764 10314 0x7491de90 WARN GST_PADS gstpad.c:4226:gst_pad_peer_query:<videoscale0:src> could not send sticky events
0:00:04.001816134 10314 0x7491de90 ERROR omxh264enc gstomxh264enc.c:706:gst_omx_h264_enc_set_format:<omxh264enc-omxh264enc0> Unsupported profile constrained-baseline
0:00:04.001956914 10314 0x7491de90 ERROR omxvideoenc gstomxvideoenc.c:2239:gst_omx_video_enc_set_format:<omxh264enc-omxh264enc0> Subclass failed to set the new format
0:00:04.002098111 10314 0x7491de90 WARN videoencoder gstvideoencoder.c:678:gst_video_encoder_setcaps:<omxh264enc-omxh264enc0> rejected caps video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, format=(string)I420, interlace-mode=(string)progressive
0:00:04.037642275 10314 0x7491de90 ERROR omxh264enc gstomxh264enc.c:706:gst_omx_h264_enc_set_format:<omxh264enc-omxh264enc0> Unsupported profile constrained-baseline
0:00:04.037781284 10314 0x7491de90 ERROR omxvideoenc gstomxvideoenc.c:2239:gst_omx_video_enc_set_format:<omxh264enc-omxh264enc0> Subclass failed to set the new format
0:00:04.037959303 10314 0x7491de90 WARN videoencoder gstvideoencoder.c:678:gst_video_encoder_setcaps:<omxh264enc-omxh264enc0> rejected caps video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, format=(string)I420, interlace-mode=(string)progressive
0:00:04.038154562 10314 0x7491de90 WARN basesrc gstbasesrc.c:3055:gst_base_src_loop:<v4l2src0> error: Internal data stream error.
0:00:04.038222947 10314 0x7491de90 WARN basesrc gstbasesrc.c:3055:gst_base_src_loop:<v4l2src0> error: streaming stopped, reason not-negotiated (-4)
0:00:04.038854870 10314 0x75c08350 WARN rtspmedia rtsp-media.c:1834:default_handle_message: 0x75c4e120: got error Internal data stream error. (gstbasesrc.c(3055): gst_base_src_loop (): /GstPipeline:media-pipeline/GstBin:bin0/GstV4l2Src:v4l2src0:
streaming stopped, reason not-negotiated (-4))
0:00:04.039143357 10314 0x20b2490 WARN rtspmedia rtsp-media.c:2127:wait_preroll: failed to preroll pipeline
0:00:04.039219346 10314 0x20b2490 WARN rtspmedia rtsp-media.c:2384:gst_rtsp_media_prepare: failed to preroll pipeline
0:00:04.053306794 10314 0x7491de90 ERROR omxh264enc gstomxh264enc.c:706:gst_omx_h264_enc_set_format:<omxh264enc-omxh264enc0> Unsupported profile constrained-baseline
0:00:04.053442678 10314 0x7491de90 ERROR omxvideoenc gstomxvideoenc.c:2239:gst_omx_video_enc_set_format:<omxh264enc-omxh264enc0> Subclass failed to set the new format
0:00:04.053582781 10314 0x7491de90 WARN videoencoder gstvideoencoder.c:678:gst_video_encoder_setcaps:<omxh264enc-omxh264enc0> rejected caps video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)5/1, pixel-aspect-ratio=(fraction)1/1, format=(string)I420, interlace-mode=(string)progressive
0:00:04.079457589 10314 0x20b2490 ERROR rtspclient rtsp-client.c:678:find_media: client 0x2010610: can't prepare media
0:00:04.081144660 10314 0x20b2490 ERROR rtspclient rtsp-client.c:2210:handle_describe_request: client 0x2010610: no media
omxh264enc的文档中没有关于我可以找到的配置文件的任何内容：
gst-inspect-1.0 omxh264enc
Factory Details:
Rank primary + 1 (257)
Long-name OpenMAX H.264 Video Encoder
Klass Codec/Encoder/Video
Description Encode H.264 video streams
Author Sebastian Dröge <sebastian.droege@collabora.co.uk>
Plugin Details:
Name omx
Description GStreamer OpenMAX Plug-ins
Filename /usr/lib/arm-linux-gnueabihf/gstreamer-1.0/libgstomx.so
Version 1.14.4
License LGPL
Source module gst-omx
Source release date 2018-10-02
Binary package GStreamer OpenMAX Plug-ins source release
Origin URL Unknown package origin
GObject
+----GInitiallyUnowned
+----GstObject
+----GstElement
+----GstVideoEncoder
+----GstOMXVideoEnc
+----GstOMXH264Enc
+----GstOMXH264Enc-omxh264enc
Implemented Interfaces:
GstPreset
Pad Templates:
SRC template: 'src'
Availability: Always
Capabilities:
video/x-h264
width: [ 16, 4096 ]
height: [ 16, 4096 ]
SINK template: 'sink'
Availability: Always
Capabilities:
video/x-raw
width: [ 1, 2147483647 ]
height: [ 1, 2147483647 ]
framerate: [ 0/1, 2147483647/1 ]
Element has no clocking capabilities.
Element has no URI handling capabilities.
Pads:
SINK: 'sink'
Pad Template: 'sink'
SRC: 'src'
Pad Template: 'src'
Element Properties:
name : The name of the object
flags: readable, writable
String. Default: "omxh264enc-omxh264enc0"
parent : The parent of the object
flags: readable, writable
Object of type "GstObject"
qos : Handle Quality-of-Service events from downstream
flags: readable, writable
Boolean. Default: false
control-rate : Bitrate control method
flags: readable, writable, changeable only in NULL or READY state
Enum "GstOMXVideoEncControlRate" Default: -1, "default"
(0): disable - Disable
(1): variable - Variable
(2): constant - Constant
(3): variable-skip-frames - Variable Skip Frames
(4): constant-skip-frames - Constant Skip Frames
(-1): default - Component Default
target-bitrate : Target bitrate in bits per second (0xffffffff=component default)
flags: readable, writable, changeable in NULL, READY, PAUSED or PLAYING state
Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295
quant-i-frames : Quantization parameter for I-frames (0xffffffff=component default)
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295
quant-p-frames : Quantization parameter for P-frames (0xffffffff=component default)
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295
quant-b-frames : Quantization parameter for B-frames (0xffffffff=component default)
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295
inline-header : Inline SPS/PPS header before IDR
flags: readable, writable, changeable only in NULL or READY state
Boolean. Default: true
periodicity-idr : Periodicity of IDR frames (0xffffffff=component default)
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295
periodicty-idr : Periodicity of IDR frames (0xffffffff=component default) DEPRECATED - only for backwards compat
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295
interval-intraframes: Interval of coding Intra frames (0xffffffff=component default)
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295
b-frames : Number of B-frames between two consecutive I-frames (0xffffffff=component default)
flags: readable, writable, changeable only in NULL or READY state
Unsigned Integer. Range: 0 - 4294967295 Default: 4294967295
entropy-mode : Entropy mode for encoding process
flags: readable, writable, changeable only in NULL or READY state
Enum "GstOMXH264EncEntropyMode" Default: -1, "default"
(0): CAVLC - CAVLC entropy mode
(1): CABAC - CABAC entropy mode
(-1): default - Component Default
constrained-intra-prediction: If enabled, prediction only uses residual data and decoded samples from neighbouring coding blocks coded using intra prediction modes
flags: readable, writable, changeable only in NULL or READY state
Boolean. Default: false
loop-filter-mode : Enable or disable the deblocking filter (0xffffffff=component default)
flags: readable, writable, changeable only in NULL or READY state
Enum "GstOMXH264EncLoopFilter" Default: -1, "default"
(0): enable - Enable deblocking filter
(1): disable - Disable deblocking filter
(2): disable-slice-boundary - Disables deblocking filter on slice boundary
(-1): default - Component Default
我是gstreamer的新手，所以我可能读错了这一切，不胜感激任何想法或反馈！谢谢！
答案 0 :(得分：1)
您可以通过SRC上限更改该值，例如：
v4l2src device=/dev/video0 ! videoconvert ! omxh264enc ! video/x-h264,profile=baseline ! h264parse ! rtph264pay name=pay0