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• build : Have old H.264/HEVC nvenc encoders select their new counterparts

  3 décembre 2016, par Diego Biurrun

  build : Have old H.264/HEVC nvenc encoders select their new counterparts
  This makes sense and takes care of missing build dependencies.
  

  • [DBH] configure

• Audio encoding using avcodec_fill_audio_frame() and memory leaks

  7 mai 2014, par praks411

  As a part of encoding decoded audio packets, I’m using avcodec_fill_audio_frame(). I’m passing allocated AVFrame pointer to along with buffer containing the decoded samples and other parameters number of channels, sample format, buffer size. Though the encoding is working fine I’m not able to completely eliminate the memory leaks. I’ve taken care of most of things but still I’m not able detect the leakage.
  Below is the function which I’m using for encoding. Please suggest something.
  AudioSample contains decoded data and it is completely managed in different class(free in class destructor). I’m freeing the AVFrame in FFmpegEncoder destructor and AVPacket is freed every time using av_free_packet() with av_packet_destruct enabled. What more do I need to free ?

  void FfmpegEncoder::WriteAudioSample(AudioSample *audS) 
  
  { 
  
  
  
  
  
      int num_audio_frame = 0; 
  
      AVCodecContext *c = NULL; 
  
     // AVFrame *frame; 
  
      AVPacket pkt; 
  
  
  
      av_init_packet(&pkt); 
  
      pkt.destruct = av_destruct_packet; 
  
      pkt.data = NULL; 
  
      pkt.size = 0; 
  
      int ret = 0, got_packet = 0; 
  
      c = m_out_aud_strm->codec; 
  
       static int64_t aud_pts_in = -1; 
  
  
  
      if((audS != NULL) && (audS->GetSampleLength() > 0) ) 
  
      { 
  
          int byte_per_sample = av_get_bytes_per_sample(c->sample_fmt); 
  
  
  
          PRINT_VAL("Byte Per Sample ", byte_per_sample) 
  
          m_frame->nb_samples = (audS->GetSampleLength())/(c->channels*av_get_bytes_per_sample(c->sample_fmt)); 
  
          if(m_frame->nb_samples == c->frame_size) 
  
          {   
  
  
  
  #if 1 
  
          if(m_need_resample && (c->channels >= 2)) 
  
             { 
  
                 uint8_t * t_buff1 = new uint8_t[audS->GetSampleLength()]; 
  
                 if(t_buff1 != NULL) 
  
                  { 
  
                       for(int64_t i = 0; i< m_frame->nb_samples; i++) 
  
                      { 
  
                          memcpy(t_buff1 + i*byte_per_sample, (uint8_t*)((uint8_t*)audS->GetAudioSampleData() + i*byte_per_sample*c->channels), byte_per_sample); 
  
                          memcpy(t_buff1 + (audS->GetSampleLength())/2 + i*byte_per_sample, (uint8_t*)((uint8_t*)audS->GetAudioSampleData() + i*byte_per_sample*c->channels+ byte_per_sample), byte_per_sample); 
  
                      } 
  
                      audS->FillAudioSample(t_buff1, audS->GetSampleLength()); 
  
                      delete[] t_buff1; 
  
                  } 
  
              } 
  
  #endif 
  
              ret = avcodec_fill_audio_frame(m_frame, c->channels, c->sample_fmt, (uint8_t*)audS->GetAudioSampleData(),m_frame->nb_samples*byte_per_sample*c->channels, 0); 
  
              //ret = avcodec_fill_audio_frame(&frame, c->channels, c->sample_fmt, t_buff,frame.nb_samples*byte_per_sample*c->channels, 0); 
  
              if(ret != 0) 
  
              { 
  
                  PRINT_MSG("Avcodec Fill Audio Failed ") 
  
              } 
  
              else 
  
              { 
  
                  got_packet = 0; 
  
                  ret = avcodec_encode_audio2(c, &pkt, m_frame, &got_packet); 
  
                  if(ret < 0 || got_packet == 0) 
  
                  { 
  
                      PRINT_MSG("failed to encode audio ")     
  
                  } 
  
                  else 
  
                  { 
  
                      PRINT_MSG("Audio Packet Encoded "); 
  
                      aud_pts_in++; 
  
                      pkt.pts = aud_pts_in; 
  
                      pkt.dts = pkt.pts; 
  
                      pkt.stream_index = m_out_aud_strm->index; 
  
  
  
                      ret = av_interleaved_write_frame(oc, &pkt); 
  
                      if(ret != 0) 
  
                      { 
  
                          PRINT_MSG("Error Write Audio PKT ")     
  
                      } 
  
                      else 
  
                      { 
  
                          PRINT_MSG("Audio PKT Writen ")     
  
                      } 
  
                  } 
  
               } 
  
          } 
  
          avcodec_flush_buffers(c); 
  
       //   avcodec_free_frame(&frame); 
  
       } 
  
  
  
       av_free_packet(&pkt); 
  
  } 

  Thanks,
  Pradeep

• FFMPEG "Segmentation fault" with network stream source

  23 décembre 2023, par user11186466

  I use release : 4.2.2 (static) from "https://johnvansickle.com/ffmpeg/"

  



  Final code will be on "Amazon AWS lambda"

  



  Goal : use a url stream and add watermak

  



  Link to video : ​https://feoval.fr/519.mp4

  



  Link to Watermak : ​https://feoval.fr/watermark.png

  



  ./ffmpeg -i "https://feoval.fr/519.mp4" -i "./watermark.png" -filter_complex "overlay=W-w-10:H-h-10:format=rgb" -f "mp4" -movflags "frag_keyframe+empty_moov" -pix_fmt "yuv420p" test.mp4


  



  return "Segmentation fault"

  



  I have the same error on my computer and on AWS Lambda server

  



  ./ffmpeg -i "https://feoval.fr/519.mp4" -f "mp4" -movflags "frag_keyframe+empty_moov" -pix_fmt "yuv420p" test.mp4


  



  work (but not watermak)

  



  ./ffmpeg -i "./519.mp4" -i "./watermark.png" -filter_complex "overlay=W-w-10:H-h-10:format=rgb" -f "mp4" -movflags "frag_keyframe+empty_moov" -pix_fmt "yuv420p" test.mp4


  



  work (but not with stream)

  



  Thanks you very much !

  



  Logs for the first case who return "Segmentation fault" :

  



  ...
Stream mapping:
Stream #0:0 (h264) -> overlay:main (graph 0)
Stream #1:0 (png) -> overlay:overlay (graph 0)
overlay (graph 0) -> Stream #0:0 (libx264)
Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, ? for help
[libx264 @ 0x742e480] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x742e480] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x742e480] 264 - core 159 r2991 1771b55 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - ​http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'test.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
encoder : Lavf58.29.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 480x848, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
encoder : Lavc58.54.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
creation_time : 2020-01-13T08:54:26.000000Z
handler_name : Core Media Audio
encoder : Lavc58.54.100 aac
Segmentation fault (core dumped)