gst-launch-1.0 -v audiotestsrc ! voaacenc ! mpegtsmux ! fakesink not-negotiated (-4)

[Zhang.Ping]

Hi, all

log msg as follow:

gst-launch-1.0 -v audiotestsrc ! voaacenc ! mpegtsmux ! fakesink --gst-debug=mpegtsmux:7,voaacenc:7
0:00:00.026643052 34454 0x1790380 DEBUG voaacenc gstvoaacenc.c:290:gst_voaacenc_generate_sink_caps: generated sink caps: audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000, 64000, 88200, 96000 }, channels=(int)1; audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000, 64000, 88200, 96000 }, channels=(int)2, channel-mask=(bitmask)0x0000000000000003
Setting pipeline to PAUSED ...
0:00:00.027446020 34454 0x1790380 DEBUG voaacenc gstvoaacenc.c:188:gst_voaacenc_start:<voaacenc0> start
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstAudioTestSrc:audiotestsrc0.GstPad:src: caps = "audio/x-raw\,\ format\=\(string\)S16LE\,\ layout\=\(string\)interleaved\,\ rate\=\(int\)44100\,\ channels\=\(int\)1"
/GstPipeline:pipeline0/GstVoAacEnc:voaacenc0.GstPad:sink: caps = "audio/x-raw\,\ format\=\(string\)S16LE\,\ layout\=\(string\)interleaved\,\ rate\=\(int\)44100\,\ channels\=\(int\)1"
0:00:00.029185327 34454 0x179af70 DEBUG voaacenc gstvoaacenc.c:321:gst_voaacenc_negotiate:<voaacenc0> allowed caps: audio/mpeg, mpegversion=(int)4, rate=(int){ 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000, 64000, 88200, 96000 }, channels=(int)[ 1, 2 ], stream-format=(string){ adts, raw }, base-profile=(string)lc, framed=(boolean)true
0:00:00.029474367 34454 0x179af70 LOG voaacenc gstvoaacenc.c:494:gst_voaacenc_handle_frame:<voaacenc0> encoded to 371 bytes
/GstPipeline:pipeline0/GstVoAacEnc:voaacenc0.GstPad:src: caps = "audio/mpeg\,\ mpegversion\=\(int\)4\,\ channels\=\(int\)1\,\ rate\=\(int\)44100\,\ stream-format\=\(string\)raw\,\ level\=\(string\)2\,\ base-profile\=\(string\)lc\,\ profile\=\(string\)lc\,\ codec_data\=\(buffer\)1208"
0:00:00.029888797 34454 0x179af70 DEBUG voaacenc gstvoaacenc.c:452:gst_voaacenc_handle_frame:<voaacenc0> no data
ERROR: from element /GstPipeline:pipeline0/GstAudioTestSrc:audiotestsrc0: Internal data flow error.
0:00:00.030005637 34454 0x179af70 DEBUG mpegtsmux mpegtsmux.c:1098:mpegtsmux_collected_buffer:<mpegtsmux0> Pads collected
Additional debug info:
gstbasesrc.c(2932): gst_base_src_loop (): /GstPipeline:pipeline0/GstAudioTestSrc:audiotestsrc0:
streaming task paused, reason not-negotiated (-4)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
0:00:00.030095660 34454 0x179af70 DEBUG mpegtsmux mpegtsmux.c:726:mpegtsmux_create_stream:<mpegtsmux0:sink_65> Sink pad caps were not set before pushing
0:00:00.030199715 34454 0x179af70 WARN mpegtsmux mpegtsmux.c:798:mpegtsmux_create_streams:<mpegtsmux0> error: Could not create handler for stream
/GstPipeline:pipeline0/GstVoAacEnc:voaacenc0.GstPad:src: caps = "NULL"
0:00:00.030438731 34454 0x1790380 DEBUG voaacenc gstvoaacenc.c:204:gst_voaacenc_stop:<voaacenc0> stop
/GstPipeline:pipeline0/GstVoAacEnc:voaacenc0.GstPad:sink: caps = "NULL"
/GstPipeline:pipeline0/GstAudioTestSrc:audiotestsrc0.GstPad:src: caps = "NULL"
Freeing pipeline ...
0:00:00.031142592 34454 0x1790380 DEBUG mpegtsmux mpegtsmux.c:1312:mpegtsmux_release_pad:<mpegtsmux0> Pad <mpegtsmux0:sink_65> being released

[Sebastian Dröge]

Post by Zhang.Ping
Hi, all
gst-launch-1.0 -v audiotestsrc ! voaacenc ! mpegtsmux ! fakesink --gst-debug=mpegtsmux:7,voaacenc:7

gst-launch-1.0 -v audiotestsrc ! voaacenc ! aacparse ! mpegtsmux ! fakesink
^
see here --------------------------------------

You need a parser to convert the voaacenc output to the stream format
that mpegtsmux requires. From the complete debug logs you would see that
something there complains about incompatible caps.

Always add parsers after encoders and before muxers, unless there is no
parser.