Hello Dan, I reply in line.
On 23 December 2016 at 22:02, Dan Dennedy <d...@dennedy.org> wrote:
> What is the closest melt command line that works?
>
I am trying with this (simplier) Melt command which is working fine for me:
melt -profile atsc_1080i_50 test_1.mp4 \
-consumer cbrts udp.address=224.168.225.202 udp.port=5678 udp.ttl=12
udp.reuse=1 udp.rtp=0 muxrate=10240000 udp.buffer=1000 \
vcodec=mpeg2video bufsize=5505024 vb=5M minrate=5M maxrate=5M g=15 bf=2 \
acodec=mp2 ab=160k threads=3 real_time=1
> Next, incrementally change it closer to your goal testing it at each step
> until you figure out that X breaks it.
>
I have put it in a Melted config file (as simple as possible) and I am
still getting the same floating point exception from Melted.
(7) loaded clip /home/mlt/test_files/test_1.mp4
Floating point exception
This is the reduced config file I am trying with:
# You can add any sequence of MVCP commands here to initialize the server.
# SET HOME FOLDER FOR CLIPS
set root=/home/mlt/test_files
#### ADD CBRTS OUTPUTS ###
UADD cbrts
USET U0 consumer.mlt_profile=atsc_1080i_50
USET U0 consumer.udp.address=224.168.225.202
USET U0 consumer.udp.port=5678
USET U0 consumer.udp.ttl=12
USET U0 consumer.udp.reuse=1
USET U0 consumer.udp.rtp=0
# MUXRATE PARAMS
USET U0 consumer.udp.muxrate=10240000
USET U0 consumer.udp.buffer=1000
### CONFIG U0 IN MPEG-2 FORMAT ###
USET U0 consumer.f=mpegts
USET U0 consumer.vcodec=mpeg2video
USET U0 consumer.bufsize=5505024
USET U0 consumer.vb=5M
USET U0 consumer.minrate=5M
USET U0 consumer.maxrate=5M
USET U0 consumer.g=15
USET U0 consumer.bf=2
USET U0 consumer.acodec=mp2
USET U0 consumer.ab=160k
USET U0 consumer.threads=3
USET U0 consumer.real_time=1
# LOAD CLIPS IN U0 --> CBRTS
LOAD U0 test_1.mp4
PLAY U0
> Are you certain that the FFmpeg mp2 encoder supports 16 channels?
>
Yes, I am sure. Indeed if I change (in the first config file I've sent you
in this post) the cbrts UADD line with this one:
UADD avformat:udp://224.168.225.202:2001?pkt_size=1316\&reuse=1
Melted is working perfectly.
> Why do you set the mlt_profile to 1080i but then set s=1280x720? Pick one
> resolution and set it as the profile.
>
>
In my last test I have removed this option (s=1280x720) and left only the
profile but I am still getting the floating point exception error when
launching melted.
Of course I am testing with the same input clip (test_1.mp4) in Melt and
Melted (the same machine, the same shell version an so on).
I don't know what else to try to make it work in Melted. I can grab more
information for you if needed with gdb or ddd (with a little piece of
advice though I've never used the debugger before).
Thank you for your help.
Regards,
David
>
> On Fri, Dec 23, 2016 at 4:42 AM David Alonso Grande <dalon...@gmail.com>
> wrote:
>
>> Hello Dan,
>>
>> Thank you for you help. I've managed to move forward but still I don't
>> get to play anything.
>> I am getting a *Floating point exception* from Melted server.
>>
>> This is the config file I am using in melted:
>>
>> ## ADD root path
>> set root=/home/mlt/test_files
>>
>> #### ADD CBRTS OUTPUTS ###
>> UADD cbrts
>>
>> USET U0 consumer.udp.address=224.168.225.202
>> USET U0 consumer.udp.port=2002
>> USET U0 consumer.udp.ttl=12
>>
>> USET U0 consumer.udp.interface=lo
>>
>> # MUXRATE PARAMS
>> USET U0 consumer.udp.muxrate=10240000
>>
>> #INFINITE LOOP
>> USET U0 eof=loop
>> # CONFIG VIDEO PARAMS
>> USET U0 consumer.mlt_profile=atsc_1080i_50
>> USET U0 consumer.terminate_on_pause=0
>> USET U0 consumer.real_time=1
>> USET U0 consumer.channels=16
>> USET U0 producer.audio_index=all
>> USET U0 consumer.channels.0=2
>> USET U0 consumer.channels.1=2
>> USET U0 consumer.channels.2=2
>> USET U0 consumer.channels.3=2
>> USET U0 consumer.channels.4=2
>> USET U0 consumer.channels.5=2
>> USET U0 consumer.channels.6=2
>> USET U0 consumer.channels.7=2
>>
>> USET U0 consumer.threads=2
>>
>> ### CONFIG U0 IN MPEG-2 FORMAT ###
>> USET U0 consumer.f=mpegts
>> USET U0 consumer.vcodec=mpeg2video
>> USET U0 consumer.vb=7000k
>> USET U0 consumer.s=1280x720
>> USET U0 consumer.acodec=mp2
>> USET U0 consumer.ab=256k
>> USET U0 consumer.minrate=7000k
>> USET U0 consumer.maxrate=7000k
>> USET U0 consumer.bufsize=1835008
>> USET U0 consumer.bf=2
>> USET U0 consumer.g=15
>>
>> # LOAD CLIP IN U0
>> LOAD U0 test_1.mp4
>> PLAY U0
>>
>> I don't get any error from Melted config file (all 200 codes), but when I
>> uncomment the PLAY U0 line, I get:
>>
>> (5) Starting server on 5250.
>> (7) SET root = /home/mlt/test_files
>> [h264 @ 0x10f5440] Reinit context to 1920x1088, pix_fmt: yuv420p
>> [h264 @ 0x1141ae0] Reinit context to 1920x1088, pix_fmt: yuv420p
>> [h264 @ 0x1155ee0] Reinit context to 1920x1088, pix_fmt: yuv420p
>> [producer avformat] audio: total_streams 1 max_stream 1 total_channels 2
>> max_channels 2
>> (7) loaded clip /home/mlt/test_files/test_1.mp4
>> *Floating point exception*
>>
>> And looking into syslog, I see this:
>>
>> Dec 23 05:07:15 OVE-DAG kernel: [5532015.110775] traps: melted[9230] trap
>> divide error ip:7f3a1a728ba7 sp:7ffcc4d29e70 error:0 in
>> libmltplusgpl.so[7f3a1a724000+10000]
>>
>> I am using melt 6.3.0. in Debian 8.
>>
>> I've read in forums about this issue but have not found much info apart
>> from this thread:
>>
>> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=681319
>>
>> What can I do with this error?
>>
>> Regards,
>>
>> David
>>
>>
>>
>>
>> On 22 December 2016 at 18:09, Dan Dennedy <d...@dennedy.org> wrote:
>>
>> On Thu, Dec 22, 2016 at 8:53 AM David Alonso Grande <dalon...@gmail.com>
>> wrote:
>>
>> Hello,
>>
>> I would like to get a CBR Mpeg2 TS over an UDP multicast generated with
>> melted. I don't have any problem when using avformat consumer (not CBR, but
>> working) but I don't manage to do it with cbrts consumer.
>>
>> I declare I have read these two links (like a thousand of times):
>>
>> http://www.mltframework.org/bin/view/MLT/ConsumerCbrts
>> http://www.mltframework.org/bin/view/MLT/ConsumerCbrtsMore
>>
>>
>> ConsumerCbrtsMore has not been updated to include the new information
>> about direct UDP output for this consumer:
>> https://www.mltframework.org/blog/smpte_2022_2_output_added/
>>
>>
>> And looked for examples in the mailing list. I've only found this post
>> suitable for my needs:
>>
>> https://sourceforge.net/p/mlt/mailman/message/32866022/
>>
>>
>> That thread as well predates the UDP support added into cbrts.
>>
>>
>> With this interesting part which I don't know how to use, thought it
>> seems it would suit my needs.
>>
>> consumer = mlt.Consumer( profile, "avformat:udp://
>> 224.224.224.224:1234?pkt_size=1316&reuse=1" )
>> consumer.set( "real_time", 1 )
>>
>>
>> No, you do not want to do that.
>>
>>
>> I am testing in a Debian 8 with bash 4.3.30
>>
>> Roadmap:
>>
>> - First: Manage to make it work with Melt.
>> - Second: Analyze output with streamguru
>> - Third: Manage to make it work in Melted and use it for playout.
>>
>> Ok, let's go step by step.
>>
>> 1. I am running this shell script directly in bash:
>>
>> melt -profile atsc_1080i_50 test_2_audios_dag.mp4 audio_index=all
>> -consumer cbrts muxrate=10240000 \
>> vcodec=mpeg2video bufsize=1835008 vb=7000k minrate=7000k maxrate=7000k
>> g=15 bf=2 \
>> acodec=mp2 ab=256k channels=4 channels.0=2 channels.1=2 \
>> ds=3 real_time=-2
>>
>> which sends everything to stdout.
>>
>> 2. How do I capture that info from stdout and send it to an udp socket?
>>
>>
>> Use the cbrts consumer, but see all the options beginning with "udp."
>> here:
>> https://www.mltframework.org/plugins/ConsumerCbrts
>>
>> The comment on that page "The stream is always output to STDOUT at this
>> time." is also wrong and out-of-date - an oversight when updating these
>> docs for the new options. At a minimum, you must set only udp.address.
>>
>>
>> I've seen your python example program in CbrtsMore web page, but how do I
>> run it? I mean how do I connect my shell script output to the python
>> program?
>>
>>
>> No longer needed.
>>
>>
>> 3. How (where) can use this?
>>
>> consumer = mlt.Consumer( profile, "avformat:udp://
>> 224.224.224.224:1234?pkt_size=1316&reuse=1" )
>> consumer.set( "real_time", 1 )
>>
>> 4. And finally: If I manage to make this work in Melt, how can I put it
>> in a Melted config file?
>>
>>
>> Then, it is simply a consumer you add just like any other: UADD ...
>> followed by a sequence of property setters USET.
>>
>>
>> As you can see I am a rookie developer. Any help would be really
>> appreciated.
>>
>> Regards,
>>
>> David
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
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>>
>>
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