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• fftools/ffmpeg_enc : move set_encoder_id() to ffmpeg_mux_init

  10 septembre 2024, par Anton Khirnov

  fftools/ffmpeg_enc : move set_encoder_id() to ffmpeg_mux_init
  This code uses no encoder properties or state besides its name, and is
  
  mostly muxer logic, and thus belongs more properly into the muxer.
  The results of several test change due to different metadata tag order
  
  (the "encoder" tag is now set first).
  

  • [DH] fftools/ffmpeg_enc.c
  • [DH] fftools/ffmpeg_mux_init.c
  • [DH] tests/ref/fate/ffprobe_compact
  • [DH] tests/ref/fate/ffprobe_csv
  • [DH] tests/ref/fate/ffprobe_default
  • [DH] tests/ref/fate/ffprobe_flat
  • [DH] tests/ref/fate/ffprobe_ini
  • [DH] tests/ref/fate/ffprobe_json
  • [DH] tests/ref/fate/ffprobe_xml
  • [DH] tests/ref/fate/ffprobe_xsd
  • [DH] tests/ref/fate/matroska-encoding-delay
  • [DH] tests/ref/fate/matroska-mastering-display-metadata
  • [DH] tests/ref/fate/rgb24-mkv

• avcodec/mpegvideo_dec : Move setting dct_unquant funcs to h263dec.c

  14 juin 2024, par Andreas Rheinhardt

  avcodec/mpegvideo_dec : Move setting dct_unquant funcs to h263dec.c
  It is a better place for it ; no non-h263-based decoder needs
  
  these functions any more (both H.261 and the error resilience
  
  code recently stopped doing so).
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/h263dec.c
  • [DH] libavcodec/mpegvideo_dec.c

• ffmpeg - data is being "removed" while h264 is being processed by ffmpeg

  21 mai 2024, par Laki

  I got a file which is created based on messages coming from streaming, all of the "messages" are ending with b'h264\x00'
I got a need to

  


  

  • load the data into ffmpeg

  


  • perform some processing of the data

  


  • re-attach the data to same "messages"

  


  


  Data is loaded with ffmpeg and saved with ffmpeg - however - ffmpeg removes "part" of the data
I have simplified the process and currently I am only loading and saving the data, without any processing, but still - part of the data is being removed

  


  I have used several commands - but always, part of my data is being removed

  


  ffmpeg -i sthg3.h264  -c copy st3.h264
ffmpeg  -err_detect ignore_err -i sthg3.h264  -c copy st3.h264
ffmpeg -fflags +genpts -i sthg3.h264 -c copy st3.h264 


  


  I have created the script for calculating that

  


  file_out = 'sthg3.h264'
def split_file(input_file,chunki):
    output_files = []
    with open(input_file, 'rb') as f:
        file_number = 0
        while True:
            chunk = f.read(504096)  # Read a chunk of data
            if not chunk:  # End of file
                break
            index = chunk.find(chunki)  # Find the delimiter
            while index != -1:
                chunk = chunk[index+len(chunki):]
                file_number += 1
                index = chunk.find(chunki)  # Find the next delimiter
    return file_number

chunki = b'h264\x00'
print(split_file(file_out,chunki))
chunki = b'\x00\x01\x00'
print(split_file(file_out,chunki))
    
chunki = b'h264\x00'
#chunki = b'\x00\x00\xdc\x9e'
print(split_file('st3.h264',chunki))
chunki = b'\x00\x01\x00'
print(split_file('st3.h264',chunki))


  


  and here is the question, how to push data through ffmpeg to avoid removing data, or replace it with something that would not be removed ?