[FFmpeg-trac] #10966(undetermined:new): Regression - Memory leak when muxing raw h264 streams

[FFmpeg]

#10966: Regression - Memory leak when muxing raw h264 streams
-------------------------------------+-------------------------------------
             Reporter:  Francesco    |                     Type:  defect
  Bucciantini                        |
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  h264         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 When raw h264 streams (i.e raw_video.h264 files) are being muxed in a
 container, FFMpeg keeps allocating RAM with no clear progress until it
 goes into paging files on Windows or swap on Linux and then eventually
 crashes.

 How to reproduce:

 Step 1)
 Create a simple Colorbars script with Avisynth and call it "AVS
 Script.avs"


 {{{
 ColorBars(1920, 1080, pixel_type="YUV422P16")
 }}}


 Step 2)
 Encode the colorbars with x264 to create a raw_video.h264 stream


 {{{
 x264-10b.exe "AVS Script.avs" --preset medium --profile high422 --level
 4.1 --opencl --keyint 1 --no-cabac --avcintra 100 --avcintra-flavor
 panasonic --deblock -1:-1 --tff --overscan show --colormatrix bt709
 --range tv --log-level info --thread-input --transfer bt709 --colorprim
 bt709 --videoformat component --nal-hrd cbr --output-depth 10 --output-csp
 i422 --output "raw_video.h264"
 }}}


 Step 3)
 Mux the newly produced raw_video.h264 into any container you like, be it
 mkv or mxf or whatever


 {{{
 ffmpeg.exe -hide_banner -i "raw_video.h264" -map 0:0 -c:v copy -f mxf
 "output.mxf"
 }}}



 Expected behavior:

 FFMpeg muxes the file in mxf or whatever container you pick.


 Actual behavior:

 FFMpeg keeps allocating RAM until it crashes with no clear progress.

 In the following example, I'm trying to use the newly encoded H264 stream
 and the audio from Avisynth on a real file to then re-encode the audio in
 PCM 24bit 48000Hz little endian and mux the whole thing in mxf

 [[Image(https://i.imgur.com/NJGfFUV.png)]]
 [[Image(https://i.imgur.com/jTPU3OZ.png)]]
 [[Image(https://i.imgur.com/LjoFkkQ.png)]]

 That's the latest master from today, namely N-114842-g639013aafc from the
 17th of April 2024.
 Using version N-97504-g1128aa8 from 2020 works instead with the exact same
 commands, which points to a regression.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10966>
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