<div dir="ltr">Hi All, Please let me know if this is not the right mailing list for this type of question. I started learning GStreamer, and created a pipeline with the following 4 elements. appsrc -> capsfilter -> omxh264enc -> fakesink appsrc elements were set to caps: "video/x-raw", "format", G_TYPE_STRING, "I420", "width", G_TYPE_INT, 320, "height", G_TYPE_INT, 240, "framerate", GST_TYPE_FRACTION, 30, 1, NULL stream-type: GST_APP_STREAM_TYPE_STREAM format: GST_FORMAT_TIME blocksize: 320 * 240 * 3 / 2 is-live: TRUE capsfilter elements were set to caps: "video/x-raw", "format", G_TYPE_STRING, "I420", "width", G_TYPE_INT, 320, "height", G_TYPE_INT, 240, "framerate", GST_TYPE_FRACTION, 30, 1, NULL omxh264enc elements were set to target-bitrate: 250000 But I'm getting the following erros when I start streaming. 0:00:00.083272126 2239 0x55c03260a0 WARN omxvideoenc gstomxvideoenc.c:3068:gst_omx_video_enc_propose_allocation:<encoder> allocation query does not contain caps 0:00:00.084553484 2239 0x55c03260a0 WARN basetransform gstbasetransform.c:1355:gst_base_transform_setcaps:<mYuvFilter> transform could not transform video/x-raw, format=(string)I420, width=(int)320 , height=(int)240, framerate=(fraction)30/1 in anything we support Got state-changed message 0:00:00.093299248 2239 0x55c03260a0 WARN basetransform gstbasetransform.c:1355:gst_base_transform_setcaps:<mYuvFilter> transform could not transform video/x-raw, format=(string)I420, width=(int)320 , height=(int)240, framerate=(fraction)30/1 in anything we support 0:00:00.094138019 2239 0x55c03260a0 WARN basetransform gstbasetransform.c:1355:gst_base_transform_setcaps:<mYuvFilter> transform could not transform video/x-raw, format=(string)I420, width=(int)320 , height=(int)240, framerate=(fraction)30/1 in anything we support 0:00:00.094328376 2239 0x55c03260a0 WARN basesrc gstbasesrc.c:3055:gst_base_src_loop:<source> error: Internal data stream error. 0:00:00.094491287 2239 0x55c03260a0 WARN basesrc gstbasesrc.c:3055:gst_base_src_loop:<source> error: streaming stopped, reason not-negotiated (-4) 0:00:00.095398492 2239 0x55c03260a0 WARN basetransform gstbasetransform.c:1355:gst_base_transform_setcaps:<mYuvFilter> transform could not transform video/x-raw, format=(string)I420, width=(int)320 , height=(int)240, framerate=(fraction)30/1 in anything we support 0:00:00.096068675 2239 0x55c03260a0 WARN basetransform gstbasetransform.c:1355:gst_base_transform_setcaps:<mYuvFilter> transform could not transform video/x-raw, format=(string)I420, width=(int)320 , height=(int)240, framerate=(fraction)30/1 in anything we support 0:00:00.096643497 2239 0x55c03260a0 WARN basetransform gstbasetransform.c:1355:gst_base_transform_setcaps:<mYuvFilter> transform could not transform video/x-raw, format=(string)I420, width=(int)320 , height=(int)240, framerate=(fraction)30/1 in anything we support Any idea how to fix those errors? Bellow are descriptions of the elements in the pipeline I got using gst-streamer-1.0 Thanks :-) ******************************************** ****************** appsrc ****************** ******************************************** ... Element Properties: name : The name of the object flags: readable, writable String. Default: "appsrc0" parent : The parent of the object flags: readable, writable Object of type "GstObject" blocksize : Size in bytes to read per buffer (-1 = default) flags: readable, writable Unsigned Integer. Range: 0 - 4294967295 Default: 4096 num-buffers : Number of buffers to output before sending EOS (-1 = unlimited) flags: readable, writable Integer. Range: -1 - 2147483647 Default: -1 typefind : Run typefind before negotiating (deprecated, non-functional) flags: readable, writable, deprecated Boolean. Default: false do-timestamp : Apply current stream time to buffers flags: readable, writable Boolean. Default: false caps : The allowed caps for the src pad flags: readable, writable Caps (NULL) size : The size of the data stream in bytes (-1 if unknown) flags: readable, writable Integer64. Range: -1 - 9223372036854775807 Default: -1 stream-type : the type of the stream flags: readable, writable Enum "GstAppStreamType" Default: 0, "stream" (0): stream - GST_APP_STREAM_TYPE_STREAM (1): seekable - GST_APP_STREAM_TYPE_SEEKABLE (2): random-access - GST_APP_STREAM_TYPE_RANDOM_ACCESS max-bytes : The maximum number of bytes to queue internally (0 = unlimited) flags: readable, writable Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 200000 format : The format of the segment events and seek flags: readable, writable Enum "GstFormat" Default: 2, "bytes" (0): undefined - GST_FORMAT_UNDEFINED (1): default - GST_FORMAT_DEFAULT (2): bytes - GST_FORMAT_BYTES (3): time - GST_FORMAT_TIME (4): buffers - GST_FORMAT_BUFFERS (5): percent - GST_FORMAT_PERCENT block : Block push-buffer when max-bytes are queued flags: readable, writable Boolean. Default: false is-live : Whether to act as a live source flags: readable, writable Boolean. Default: false min-latency : The minimum latency (-1 = default) flags: readable, writable Integer64. Range: -1 - 9223372036854775807 Default: -1 max-latency : The maximum latency (-1 = unlimited) flags: readable, writable Integer64. Range: -1 - 9223372036854775807 Default: -1 emit-signals : Emit need-data, enough-data and seek-data signals flags: readable, writable Boolean. Default: true min-percent : Emit need-data when queued bytes drops below this percent of max-bytes flags: readable, writable Unsigned Integer. Range: 0 - 100 Default: 0 current-level-bytes : The number of currently queued bytes flags: readable Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0 duration : The duration of the data stream in nanoseconds (GST_CLOCK_TIME_NONE if unknown) flags: readable, writable Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 18446744073709551615 ... ******************************************** **************** capsfilter **************** ******************************************** ... Element Properties: name : The name of the object flags: readable, writable String. Default: "capsfilter0" parent : The parent of the object flags: readable, writable Object of type "GstObject" qos : Handle Quality-of-Service events flags: readable, writable Boolean. Default: false caps : Restrict the possible allowed capabilities (NULL means ANY). Setting this property takes a reference to the supplied GstCaps object. flags: readable, writable, changeable in NULL, READY, PAUSED or PLAYING state ANY caps-change-mode : Filter caps change behaviour flags: readable, writable, changeable in NULL, READY, PAUSED or PLAYING state Enum "GstCapsFilterCapsChangeMode" Default: 0, "immediate" (0): immediate - Only accept the current filter caps (1): delayed - Temporarily accept previous filter caps ******************************************** **************** omxh264enc **************** ******************************************** ... 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 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 ******************************************** ***************** fakesink ***************** ******************************************** ... Element Properties: name : The name of the object flags: readable, writable String. Default: "fakesink0" parent : The parent of the object flags: readable, writable Object of type "GstObject" sync : Sync on the clock flags: readable, writable Boolean. Default: false max-lateness : Maximum number of nanoseconds that a buffer can be late before it is dropped (-1 unlimited) flags: readable, writable Integer64. Range: -1 - 9223372036854775807 Default: -1 qos : Generate Quality-of-Service events upstream flags: readable, writable Boolean. Default: false async : Go asynchronously to PAUSED flags: readable, writable Boolean. Default: true ts-offset : Timestamp offset in nanoseconds flags: readable, writable Integer64. Range: -9223372036854775808 - 9223372036854775807 Default: 0 enable-last-sample : Enable the last-sample property flags: readable, writable Boolean. Default: true last-sample : The last sample received in the sink flags: readable Boxed pointer of type "GstSample" blocksize : Size in bytes to pull per buffer (0 = default) flags: readable, writable Unsigned Integer. Range: 0 - 4294967295 Default: 4096 render-delay : Additional render delay of the sink in nanoseconds flags: readable, writable Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0 throttle-time : The time to keep between rendered buffers (0 = disabled) flags: readable, writable Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0 max-bitrate : The maximum bits per second to render (0 = disabled) flags: readable, writable Unsigned Integer64. Range: 0 - 18446744073709551615 Default: 0 state-error : Generate a state change error flags: readable, writable Enum "GstFakeSinkStateError" Default: 0, "none" (0): none - No state change errors (1): null-to-ready - Fail state change from NULL to READY (2): ready-to-paused - Fail state change from READY to PAUSED (3): paused-to-playing - Fail state change from PAUSED to PLAYING (4): playing-to-paused - Fail state change from PLAYING to PAUSED (5): paused-to-ready - Fail state change from PAUSED to READY (6): ready-to-null - Fail state change from READY to NULL silent : Don't produce last_message events flags: readable, writable, changeable in NULL, READY, PAUSED or PLAYING state Boolean. Default: true dump : Dump buffer contents to stdout flags: readable, writable, changeable in NULL, READY, PAUSED or PLAYING state Boolean. Default: false signal-handoffs : Send a signal before unreffing the buffer flags: readable, writable Boolean. Default: false drop-out-of-segment : Drop and don't render / hand off out-of-segment buffers flags: readable, writable Boolean. Default: true last-message : The message describing current status flags: readable String. Default: null can-activate-push : Can activate in push mode flags: readable, writable Boolean. Default: true can-activate-pull : Can activate in pull mode flags: readable, writable Boolean. Default: false num-buffers : Number of buffers to accept going EOS flags: readable, writable Integer. Range: -1 - 2147483647 Default: -1 </div>