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• fftools/ffprobe : stop using AVFrame.pkt_{pos,size}

  9 mars 2023, par Anton Khirnov

  fftools/ffprobe : stop using AVFrame.pkt_pos,size
  These fields are ad-hoc and will be deprecated. Use the recently-added
  
  AV_CODEC_FLAG_COPY_OPAQUE to pass arbitrary user data from packets to
  
  frames.
  Changes the result of the flcl1905 test, which uses ffprobe to decode
  
  wmav2 with multiple frames per packet. Such packets are handled
  
  internally by calling the decoder's decode callback multiple times,
  
  offsetting the internal packet's data pointer and decreasing its size
  
  after each call. The output pkt_size value before this commit is then
  
  the remaining internal packet size at the time of each internal decode
  
  call.
  After this commit, output pkt_size is simply the size of the full packet
  
  submitted by the caller to the decoder. This is more correct, since
  
  internal packets are never seen by the caller and should have no
  
  observable outside effects.
  

  • [DH] fftools/ffprobe.c
  • [DH] tests/ref/fate/flcl1905

• lavc/decode : stop mangling last_pkt_props->opaque

  9 mars 2023, par Anton Khirnov

  lavc/decode : stop mangling last_pkt_props->opaque
  It is currently abused to store packet size, which breaks
  
  AV_CODEC_FLAG_COPY_OPAQUE.
  Use stream_index instead, which is unused in libavcodec and has the
  
  same type as size.
  Found-by : Martin Storsjö
  

  • [DH] libavcodec/decode.c

• Is there a way to stop ffmpeg from combining mp4s at max mp4 size ?

  3 janvier 2023, par Dray

  I am merging 64 gigs of mp4s together, though ffmpeg will go past the file size limit and corrupt it. Is there a way to stop ffmpeg at a 100 hour mark and create another file, resume, then repeat until finished ?

  


  This is my python code, with the ffmpeg code I used to generate the mp4. It works fine with less files/

  


  
from moviepy.editor import *
import os
from natsort import natsorted

L = []
total = 0
for root, dirs, files in os.walk("F:\door"):
    #files.sort()
    files = natsorted(files)
    with open("list.txt", "a") as filer:
            for file in files:
                if os.path.splitext(file)[1] == '.mp4':
                    filePath = os.path.join(root, file)
                    head, tail = os.path.split(filePath)
                    filePath = "file '" + str(tail)+"'\n"
                    print(filePath)
                    filer.write(filePath)
                    
                    #run in cmd: ffmpeg -f concat -i list.txt -c copy output.mp4