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• nvenc encoder performed resolution 2560 * 1440 encoding yuv444 failed ？

  8 novembre 2022, par Travis990

  NVIDIA Gefore GTX 1660Ti graphics card, I use video-sdk-samples for HEVC encoding, YUV format : NV_ENC_BUFFER_FORMAT_YUV444, resolution “1920 * 1080” and “3840 * 2160” resolution encoding is successful, but resolution 2560*1440 encoding, prompting error info :NV_ENC_ERR_INVALID_PARAM, I do not know where the problem lies ?

  


  void NvEncoder::DoEncode(NV_ENC_INPUT_PTR inputBuffer, std::vector<bool> &amp;vKeyFrame, std::vector> &amp;vPacket, NV_ENC_PIC_PARAMS *pPicParams)&#xA;{&#xA;    NV_ENC_PIC_PARAMS picParams = {};&#xA;    if (pPicParams)&#xA;    {&#xA;        picParams = *pPicParams;&#xA;    }&#xA;    picParams.version = NV_ENC_PIC_PARAMS_VER;&#xA;    picParams.pictureStruct = NV_ENC_PIC_STRUCT_FRAME;&#xA;    picParams.inputBuffer = inputBuffer;&#xA;    picParams.bufferFmt = GetPixelFormat();&#xA;    picParams.inputWidth = GetEncodeWidth();&#xA;    picParams.inputHeight = GetEncodeHeight();&#xA;    picParams.outputBitstream = m_vBitstreamOutputBuffer[m_iToSend % m_nEncoderBuffer];&#xA;    picParams.completionEvent = m_vpCompletionEvent[m_iToSend % m_nEncoderBuffer];&#xA;    NVENCSTATUS nvStatus = m_nvenc.nvEncEncodePicture(m_hEncoder, &amp;picParams);&#xA;    if (nvStatus == NV_ENC_SUCCESS || nvStatus == NV_ENC_ERR_NEED_MORE_INPUT)&#xA;    {&#xA;        m_iToSend&#x2B;&#x2B;;&#xA;        GetEncodedPacket(m_vBitstreamOutputBuffer, vKeyFrame, vPacket, false);&#xA;    }&#xA;    else&#xA;    {&#xA;        printf("picParams.inputWidth = %d,picParams.inputHeight = %d \n", picParams.inputWidth, picParams.inputHeight);&#xA;        NVENC_THROW_ERROR("nvEncEncodePicture API failed", nvStatus);&#xA;    }&#xA;}&#xA;&#xA;error:&#xA;nvEncEncodePicture Prompt Error：NV_ENC_ERR_INVALID_PARAM &#xA;&#xA;</bool>

  


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• dnn_backend_tf.c : add option sess_config for tf backend

  12 octobre 2020, par Guo, Yejun

  dnn_backend_tf.c : add option sess_config for tf backend
  TensorFlow C library accepts config for session options to
  
  set different parameters for the inference. This patch exports
  
  this interface.
  The config is a serialized tensorflow.ConfigProto proto, so we need
  
  two steps to use it :
  
  1. generate the serialized proto with python (see script example below)
  
  the output looks like : 0xab...cd
  
  where 0xcd is the least significant byte and 0xab is the most significant byte.
  2. pass the python script output into ffmpeg with
  
  dnn_processing=options=sess_config=0xab...cd
  The following script is an example to specify one GPU. If the system contains
  
  3 GPU cards, the visible_device_list could be '0', '1', '2', '0,1' etc.
  
  '0' does not mean physical GPU card 0, we need to try and see.
  
  And we can also add more opitions here to generate more serialized proto.
  script example to generate serialized proto which specifies one GPU :
  
  import tensorflow as tf
  
  gpu_options = tf.GPUOptions(visible_device_list='0')
  
  config = tf.ConfigProto(gpu_options=gpu_options)
  
  s = config.SerializeToString()
  
  b = ''.join("%02x" % int(ord(b)) for b in s[: :-1])
  
  print('0x%s' % b)
  

  • [DH] libavfilter/dnn/dnn_backend_tf.c

• How to modify this Windows script to do a match ?

  21 janvier 2016, par Andrei Clear

  ffmpeg can resize a video/image file .. first is input_file .. parameters .. output_file ..

  ffmpeg -i input.avi -vf scale=320:240 output.avi

  or

  ffmpeg -i 20140724_071746.mp4 -vf scale=640:-1 20140724_071746_LOW_640.mp4

  more info here : https://trac.ffmpeg.org/wiki/Scaling%20%28resizing%29%20with%20ffmpeg

  I want it to downscale all the videos on my microSD card to create space (I have originals backed-up)

  So I want it to go throw all the files in all the sub-directories overnight and resize all the files. Chances are that the script might stop or crash and I would need to run it again, or if I add new files I would want to run it again.

  So I would want it to skip processing all the files that have been processed AND their resized versions.

  In my case if a FILE_NAME.mp4 also has FILE_NAME_LOW_640.mp4 SKIP it
  AND
  if a FILE_NAME_LOW_640.mp4 has *640 SKIP it

  Here is my Windows batch script so far

  REM @echo off
  
  REM just save as "DOS"
  
  REM cd /d C:\s
  
  
  
  setlocal enabledelayedexpansion
  
  for %%j in (*.mp4) do (
  
  set filename=%%~nj
  
  echo %%j
  
  
  
  ffmpeg -i %%j -vf scale=640:-1 %%j_LOW_640.mp4
  
  
  
  REM but now I want to add the two checks to skip files that have been resized .. or if they are the resized version 
  
  
  
  REM if not "!filename!"=="%%j_LOW_640.mp4" AND IF FILE !COINTAIN *640* THEN ffmpeg -i %%j -vf scale=640:-1 %%j_LOW_640.mp4
  
  
  
  )
  
  
  
  pause
  
  REM AND I would also want it to process all the sub-directories  

  In other words my questions for help are :

  1. How can I do a check for a string if it contains a string match ?

  2. How can I have my script also process all the subdirectories ?