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• How to save udp stream to TS files with FFMPEG while keeping timecode ?

  20 août 2014, par vlatkozelka

  I need to record a live udp stream containing multiple TV programs ( up to 30 ) to .ts files .To do so i’m using FFMPEG .

  I have a muxer at work , but i dont go there everyday so im using a sample .ts file containing 15 minutes recording of all the tv channels , but i tried on both and i got same results so i guess thats not a problem .The TS file is basically the same as udp , but just as a file . Same timebase , encoding , programs

  here is the code i am using :

  ffmpeg -i "d:\record ts\PBR_REC_20140426094852_485.ts" -f segment -segment_time 300 -acodec copy -vcodec copy -map 0:p:1202 "file:C:\Users\vlatkozelka\Desktop\TEST\%date:~10%%date:~7,2%%date:~4,2%%time:~0,2%%time:~3,2%%03d.ts"

  this is extracting one tv channel , program 1202 , and recording files in this format : DateTime001 ,DateTime002 .... 5 minutes each.

  now when i run these in a player i made in JAVA, which is the purpose of these, ... i can see the timestamp is reset to 00:00:00 for each file beginning. I know its not a problem in the player itself cuz i tried with other files and the timestamps are ok.

  I tried adding -copyts which for some strange reason seems to segment to 1 second long files , i tried -copytb 1 , 0 , -1 , all failed , tried -vsync passthrough , also failed (i also tried cominations of these ) And from what ive read FFMPEG guards timecode as it is by default , the build im using is fairly new i downloaded it like a month ago . And i know also that FLV requires resetting timecode , but TS is used for transport so shouldnt do this ... any ideas ?Also is there a way to slow down the copying from file to file , cuz its too fast its killing my HDD ( i mean from the .ts to the .ts not the actual udp ) ?
  thanks

• Permission issue with php + supervisord + ffmpeg + NAS + beanstalkd

  20 juin 2014, par Srini Vasan

  Im running a process using the following tools :

  php - process application
  
  beanstalkd - queue
  
  supervisord - process daemon
  
  ffmpeg - media conversion
  
  NAS - storage device

  The end result (media conversion) works perfectly, when i run the command manually as root user :

  ie. php /path/workers/media_processor.php < /dev/null &

  ie. ffmpeg takes the source mp3 file (which is on the NAS, path x) and output mp3 file also saved on NAS, path y

  But, when i run this via supervisor, ffmpeg is not generating the output mp3 as expected :
  when i also tried via lame encoder (audio encoder), the out file is not generated.

  When I changed the destination path (not NAS) to a different one (within the server),
  ffmpeg/lame is able to write file to the new server path.

  Below is my supervisor conf.

  [program:media_processor_audio]
  
  command=/usr/bin/php /path/workers/media_processor.php < /dev/null
  
  numprocs=1
  
  numprocs_start=1
  
  autostart=true
  
  autorestart=true
  
  stopsignal=QUIT
  
  log_stdout=true
  
  logfile=/path/workers/media_processor_audio.txt

  Im sure, the supervisord is running my process as root user only.
  I’ve confirmed this with get_current_user()

  Summary :

  ffmpeg/lame is able to write to NAS while running the comand manually.

  ffmpeg/lame is not able to write to NAS while the command runs via supervisord.

  Please Help. Thanks in advance.

  Regards,
  Srini

• FFMPEG Proper timeout wait time for input streams

  14 octobre 2019, par Sambir

  I use FFMPEG to grab transport streams from dvb-s2 enigma2 decoders. I noticed that sometimes the demuxers on the decoders are just fully occupied. so when requesting a stream from the decoder with ffmpeg, ffmpeg just waits until it gets some stream data. Because the decoder replies with http 200 (i am online) but doesnt send any streaming data,yet or never...

  I want FFMPEG to timeout when it doesnt get an input within a timeframe. I tried -timeout, -rwtimeout, changing the probesize and analyseduration but none of them seems to do the trick

  currently just have

  ffmpeg -i http://192.168.1.1:8001/1:0:19:4B4B:812:600:FFFF0000:0:0:0:

  I tried :

  ffmpeg -timeout 1000000 -i http://192.168.1.1:8001/1:0:19:9Y2B:812:600:FFFF0000:0:0:0:
  
  
  
  ffmpeg -rw_timeout 1000000 -i http://192.168.1.1:8001/1:0:19:9Y2B:723:600:FFFF0000:0:0:0:
  
  
  
  ffmpeg -analyseduration 500 -i http://192.168.1.1:8001/1:0:19:9Y2B:812:600:FFFF0000:0:0:0:

  then it just waits until an input stream is received. This will never come since the decoder is fully occupied.

  For this I need a timeout period. Like if within 10 seconds the probesize or analyseduration is not filled then end ffmpeg...Or just a timeout basically.

  Until now I didnt find any proper solution for this. I just kill the process manually and it tries again after 1 minute (script), then sometimes it works or i need to kill the process again.