Bug #2654
RPI Openmax Transcoder.
0%
Description
So today I played arround openmax as transcoder for tvheadend, this new pipe function is awesome.
pipe://gst-launch-1.0 souphttpsrc location="http://127.0.0.1:9981/stream/channelname/Boomerang" is-live=true ! decodebin name=demux demux. ! queue ! audioresample ! audioconvert dithering=0 ! audio/x-raw,channels=1 ! voaacenc bitrate=64000 ! mux. mpegtsmux name=mux ! filesink location=/dev/stdout demux. ! queue ! videoconvert ! omxh264enc target-bitrate=1000000 control-rate=variable ! h264parse ! mux.
This works quite good, but only with http clients using passthrough muxer, htsp and matroska clients results in what looks like only the audio is parsed in input kb/s and nothing is passed to output.
It might boil down to invalid, non monotonically increasing dts, or sps/pps.
Files
History
Updated by Jaroslav Kysela almost 10 years ago
Updated by Attach or give an URL for a stream example (redirect the output to a mpegts file).
Updated by danny skjodt almost 10 years ago
Updated by Jaroslav Kysela wrote:
Attach or give an URL for a stream example (redirect the output to a mpegts file).
Sure, ive made this using "filesink location=test.ts" and with voaacenc. I will make one with twolame also, as it seems it produces less errors.
[mpegts @ 0xb46060] aac bitstream not in adts format and extradata missing
Updated by danny skjodt almost 10 years ago
This pipe works for intel vaapi encoding.
gst-launch-1.0 souphttpsrc location="http://127.0.0.1:9981/stream/channelname/Boomerang?mux=matroska" is-live=true ! matroskademux ! vaapidecode ! vaapiencode_h264 ! mpegtsmux ! filesink location=/dev/stdout
Havent figured out the audio yet.
But this video stream goes through tvheadends matroska muxer with no problems.
Updated by danny skjodt almost 10 years ago
gst-launch-1.0 souphttpsrc location="http://127.0.0.1:9981/stream/channelname/Boomerang?mux=matroska" is-live=true ! \
matroskademux name=demux demux. ! queue ! h264parse ! vaapidecode ! vaapiencode_h264 ! mux. mpegtsmux name=mux ! filesink location=/dev/stdout demux. ! queue ! mpegaudioparse ! mux.
Intel vaapi encoding with passthrough audio, works! 
Next problem is mpeg2video input.
Updated by danny skjodt over 9 years ago
gst-launch-1.0 souphttpsrc location="http://127.0.0.1:9981/stream/channelname/National+Geographic+Channel?mux=matroska" is-live=true ! matroskademux name=demux demux. ! queue ! vaapidecode ! vaapipostproc ! vaapiencode_h264 ! mux. mpegtsmux name=mux ! filesink location=/dev/stdout demux. ! queue ! mpegaudioparse ! mux.
For some reason you NEED vaapipostproc to link vaapidecode and vaapiencode_h264 when the input is mpeg2 !
Some might ask what is vaapi encoding ?! Well its a mix of qsv and gl shaders, and is the best thing we will have on linux since intel have commercialized their linux version off their media sdk.
With these pipelines I can transcode something like 20 MPEG2 SD channels at once to H264 on a 2600k only using the gpu. Never cpu's should do much more.
Updated by Jaroslav Kysela over 9 years ago
- Status changed from New to Invalid
It seems like a not TVH issue.
Updated by Jan g almost 9 years ago
Updated by root@raspberrypi:~# gst-launch-1.0 souphttpsrc location="http://192.168.1.59:9981/stream/channelid/596036334" is-live=true ! matroskademux name=demux demux. ! queue ! vaapidecode ! vaapipostproc ! vaapiencode_h264 ! mux. mpegtsmux name=mux ! filesink location=/dev/stdout demux. ! queue ! mpegaudioparse ! mux.
WARNING: erroneous pipeline: could not link queue0 to vaapidecode0
what is the problem?