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• aviobuf : Increase the default SHORT_SEEK_THRESHOLD to 32 KB

  30 octobre 2020, par Martin Storsjö

  aviobuf : Increase the default SHORT_SEEK_THRESHOLD to 32 KB
  The previous threshold, 4 KB, maybe was reasonable when it was set
  
  (in 2010), but in today's settings and with typical network speeds
  
  and data sizes, it's pretty small. 32 KB probably is a more reasonable
  
  default now, regardless of input.
  This changes the test references for two seek tests.
  When using the normal seek function, which boils down to the lseek(2)
  
  function, a seek to an out of bounds position doesn't return an error,
  
  but that condition is only reported when doing the subsequent read
  
  (which returns EOF). When doing more seeks by fast forwarding, the
  
  fact that the seeked to destination is out of bounds is noticed and
  
  reported sooner in these cases.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavformat/aviobuf.c
  • [DH] tests/ref/seek/lavf-al
  • [DH] tests/ref/seek/lavf-ul

• How to use separate DLL's when making separate MSI's ?

  12 juillet 2020, par hamidi

  First, it's weird why can't I use 32-bit ffmpeg DLL's in 64-bit programs ?! I use FFmpegInvoke in a C# program as a wrapper to call fffmpeg functions for getting a camera's packets and decoding them to frames. If the ffmpeg DLL's be 32-bit ones, the frames are not shown and the calls are unsuccessful.
For the program, I use Visual Studio 2010 to build separate MSI's for 32-bit and 64-bit platforms by using a VDPROJ project. My question is how can I specify separate ffmpeg DLL's for separate MSI's ? I need to build 32-bit MSI with 32-bit ffmpeg DLL's and 64-bit MSI with 64-bit ffmpeg DLL's.

  


• ffmpeg Unsupported codec adpcm_ima_wav when i want sending in RTP

  8 décembre 2020, par mohammad noroz

  when i want encode a wav file and send it with rtp in ffmpeg i receive an error that say "Unsupported codec adpcm_ima_wav" but i can encode this file with adpcm_ima_wav and save this file but i can not send with rtp in ffmpeg.

  



  ffmpeg -hide_banner -y -re -thread_queue_size 4 -i audio -acodec adpcm_ima_wav -sdp_file test.sdp  -f rtp "rtp://127.0.0.1:2222"


  



  below show this error :

  



  Input #0, wav, from 'audio':
  Metadata:
    encoded_by      : Pro Tools
    originator_reference: !jtMVHCThOfaaaGk
    date            : 2010-09-14
    creation_time   : 08:04:58
    time_reference  : 0
  Duration: 00:00:30.03, bitrate: 2304 kb/s
    Stream #0:0: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s24le (native) -> adpcm_ima_wav (native))
Press [q] to stop, [?] for help
[rtp @ 0x55867efcd380] Unsupported codec adpcm_ima_wav
Could not write header for output file #0 (incorrect codec parameters ?): Operation not permitted
Error initializing output stream 0:0 -- 
Conversion failed!