On Fri, Sep 28, 2012 at 6:54 PM, Dan Dennedy <[email protected]> wrote:
> On Fri, Sep 28, 2012 at 4:00 AM, hatsch <[email protected]> wrote:
>> i am trying to use the multi consumer with melt to capture from SDI
>> and encode to two different X264 RTMP streams.
>
> You are using MLT in a way that I do not typically use it, and I do
> not have RTMP servers or much knowledge of them. I can try to
> reproduce it with mpegts/udp.
for me it's also the first time using an RTMP server. i haven't
experienced that issue with mpegts/udp streams before.
>
>> it works fine and stable for hours when i only use one consumer. when
>> i add a second consumer i get some random crashes( seems not to happen
>> with the -debug option?!? )
>> and i am not able to quit melt anymore!
>>
>> this is my command:
>> melt -profile dv_pal_wide decklink: buffer=240 -consumer
>> avformat:rtmp://stream.url.org/live/dorf-1 \
>> vcodec=libx264 \
>> g=60 vb=600k b=600k minrate=600k maxrate=600k \
>> acodec=libfaac \
>> ab=128k ar=44100 \
>> ac=2 properties=consumer/avformat/x264-medium-baseline \
>
> generally you do not need to specify the path to the properties file
> because MLT already knows you are applying properties to an avformat
> consumer. IOW, properties=x264-medium-baseline
that makes the presets even nicer :)
btw. when using the x264 presets melt in verbose mode outputs some errors.
[NULL @ 0x7fe2c4011c20] [Eval @ 0x7fe2d19e84d0] Undefined constant or
missing '(' in 'baseline'
[NULL @ 0x7fe2c4011c20] Unable to parse option value "baseline"
[NULL @ 0x7fe2c4011c20] [Eval @ 0x7fe2d19e84d0] Undefined constant or
missing '(' in 'wpred'
[NULL @ 0x7fe2c4011c20] Unable to parse option value "wpred-dct8x8"
[NULL @ 0x7fe2c4012fe0] [Eval @ 0x7fe2d19e8480] Undefined constant or
missing '(' in 'wpred'
>
>> f=flv \
>> aspect=@16/9 real_time=-2 -verbose \
>
> you should test it with real_time=1. A positive value is generally
> preferred with streaming because it makes the avformat consumer govern
> its timing and skip flushing codec buffers when stopping. Also why use
> multiple processing threads when you are not even doing any
> processing? This property has no effect on the encoding threads.
i've changed it to real_time=1 for both consumers and i am now able
to quit melt.
but it had not enough power to do the encoding. so i've added
avformats threads=auto (threads=2 didn't work neither)
and now it works.
thank you for your help!
>
>> -consumer avformat:rtmp://stream.url.org/live/dorf-2 \
>> vcodec=libx264 vpre=medium \
>> g=60 vb=100k b=100k minrate=100k maxrate=100k \
>> acodec=aac strict=experimental \
>> ab=128k ar=44100 \
>> ac=2 properties=consumer/avformat/x264-medium-baseline \
>> f=flv \
>> -verbose -debug
>>
>> after i press the Q(uit) key (same behaviour with Ctrl-C) i get the
>> following output.
>> after that melt continues to output "frame dropped" and does not react
>> on any commands anymore (Q, Ctrl-C).
>> also kill -15 is not terminating the process, only kill -9 helps.
>>
>> [libx264 @ 0x7f1eec011c20] frame= 19 QP=39,36 NAL=2 Slice:P Poc:40
>> I:14 P:165 SKIP:1441 size=495 bytes
>> [consumer avformat] video pkt pts 800 frame pts 20 frame_size 0
>> [consumer avformat] audio pts 696 (0,696000) video pts 720 (0,720000)
>> [consumer avformat] audio pts 0 (0,000000) video pts 0 (0,000000)
>> [consumer avformat] audio stream 1 pkt pts 697 frame pts 30720 frame_size
>> 1024
>> [consumer avformat] audio pts 720 (0,720000) video pts 720 (0,720000)
>> Current Position: 51
>> [consumer multi] stopping put waiting
>> [consumer multi] stopping consumer
>> [filter audioconvert] s16 -> f32le 2 channels 1920 samples
>> [consumer avformat] worker processing index = 23 frame 0 queue count = 24
>> TFF in 0 out 0
>> [consumer avformat] waiting in worker index = 24 queue count = 24
>> [consumer avformat] audio pts 0 (0,000000) video pts 0 (0,000000)
>> mlt_cache_put_frame: put 2 = 0x7f1ed0040fe0
>> TFF in 1 out 0
>> [consumer multi] current 38938 threshold 28140 count 21
>> [producer decklink] 0
>> frame dropped 1561
>> [producer decklink] 0
>> frame dropped 1562
>> [producer decklink] 0
>> frame dropped 1563
>> [producer decklink] 0
>> frame dropped 1564
>> [producer decklink] 0
>> frame dropped 1565
>> .....
>>
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