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• Debugging FFMPEG Code (libavformat files breakpoint)

  17 octobre 2024, par Holy_diver

  I tried setting up ffmpeg for debugging, a partial success. Been able to setup debug points in top level code but not inside libavformat code files. Any idea how to compile to be able to do so.

  


  Setup :

  


  ./configure --enable-debug=3 --disable-optimizations --disable-decoder=vp9 --disable-decoder=hevc --enable-nvenc --enable-nvdec --enable-cuda --enable-cuvid --enable-nonfree --enable-gpl --extra-cflags="-I/usr/local/cuda/include" --extra-ldflags="-L/usr/local/cuda/lib64" --enable-shared --enable-libx264 --enable-gpl --disable-stripping

make clean

make -j8


  


  VS CODE SETUP

  


   {
            "name": "(gdb) Launch",
            "type": "cppdbg",
            "request": "launch",
            "program": "${workspaceFolder}/ffmpeg_master/FFmpeg/ffmpeg_g",
            "args": ["-loglevel","trace","-i", "/home/ubuntu/ffmpeg_test/testfiles/LiveOff.HEIC" ,"-map", "0","out%d.png"],
            "stopAtEntry": false,
            "cwd": "${workspaceFolder}/ffmpeg_master/FFmpeg",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                },
                {
                    "description": "Set Disassembly Flavor to Intel",
                    "text": "-gdb-set disassembly-flavor intel",
                    "ignoreFailures": true
                }
            ]
        } {
            "name": "(gdb) Launch",
            "type": "cppdbg",
            "request": "launch",
            "program": "${workspaceFolder}/ffmpeg_master/FFmpeg/ffmpeg_g",
            "args": ["-loglevel","trace","-i", "/home/ubuntu/ffmpeg_test/testfiles/LiveOff.HEIC" ,"-map", "0","out%d.png"],
            "stopAtEntry": false,
            "cwd": "${workspaceFolder}/ffmpeg_master/FFmpeg",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                },
                {
                    "description": "Set Disassembly Flavor to Intel",
                    "text": "-gdb-set disassembly-flavor intel",
                    "ignoreFailures": true
                }
            ]
        }


  


• libavcodec : vp8 neon optimizations for aarch64

  31 janvier 2019, par Magnus Röös

  libavcodec : vp8 neon optimizations for aarch64
  Partial port of the ARM Neon for aarch64.
  Benchmarks from fate :
  benchmarking with Linux Perf Monitoring API
  
  nop : 58.6
  
  checkasm : using random seed 1760970128
  
  NEON :
  
   - vp8dsp.idct       [OK]
  
   - vp8dsp.mc         [OK]
  
   - vp8dsp.loopfilter [OK]
  
  checkasm : all 21 tests passed
  
  vp8_idct_add_c : 201.6
  
  vp8_idct_add_neon : 83.1
  
  vp8_idct_dc_add_c : 107.6
  
  vp8_idct_dc_add_neon : 33.8
  
  vp8_idct_dc_add4y_c : 426.4
  
  vp8_idct_dc_add4y_neon : 59.4
  
  vp8_loop_filter8uv_h_c : 688.1
  
  vp8_loop_filter8uv_h_neon : 216.3
  
  vp8_loop_filter8uv_inner_h_c : 649.3
  
  vp8_loop_filter8uv_inner_h_neon : 195.3
  
  vp8_loop_filter8uv_inner_v_c : 544.8
  
  vp8_loop_filter8uv_inner_v_neon : 131.3
  
  vp8_loop_filter8uv_v_c : 706.1
  
  vp8_loop_filter8uv_v_neon : 141.1
  
  vp8_loop_filter16y_h_c : 668.8
  
  vp8_loop_filter16y_h_neon : 242.8
  
  vp8_loop_filter16y_inner_h_c : 647.3
  
  vp8_loop_filter16y_inner_h_neon : 224.6
  
  vp8_loop_filter16y_inner_v_c : 647.8
  
  vp8_loop_filter16y_inner_v_neon : 128.8
  
  vp8_loop_filter16y_v_c : 721.8
  
  vp8_loop_filter16y_v_neon : 154.3
  
  vp8_loop_filter_simple_h_c : 387.8
  
  vp8_loop_filter_simple_h_neon : 187.6
  
  vp8_loop_filter_simple_v_c : 384.1
  
  vp8_loop_filter_simple_v_neon : 78.6
  
  vp8_put_epel8_h4v4_c : 3971.1
  
  vp8_put_epel8_h4v4_neon : 855.1
  
  vp8_put_epel8_h4v6_c : 5060.1
  
  vp8_put_epel8_h4v6_neon : 989.6
  
  vp8_put_epel8_h6v4_c : 4320.8
  
  vp8_put_epel8_h6v4_neon : 1007.3
  
  vp8_put_epel8_h6v6_c : 5449.3
  
  vp8_put_epel8_h6v6_neon : 1158.1
  
  vp8_put_epel16_h6_c : 6683.8
  
  vp8_put_epel16_h6_neon : 831.8
  
  vp8_put_epel16_h6v6_c : 11110.8
  
  vp8_put_epel16_h6v6_neon : 2214.8
  
  vp8_put_epel16_v6_c : 7024.8
  
  vp8_put_epel16_v6_neon : 799.6
  
  vp8_put_pixels8_c : 112.8
  
  vp8_put_pixels8_neon : 78.1
  
  vp8_put_pixels16_c : 131.3
  
  vp8_put_pixels16_neon : 129.8
  Signed-off-by : Magnus Röös <mla2.roos@gmail.com>
  

  • [DH] libavcodec/aarch64/Makefile
  • [DH] libavcodec/aarch64/vp8dsp.h
  • [DH] libavcodec/aarch64/vp8dsp_init_aarch64.c
  • [DH] libavcodec/aarch64/vp8dsp_neon.S
  • [DH] libavcodec/vp8dsp.c
  • [DH] libavcodec/vp8dsp.h

• How to debug "Error in pull function & Input buffer exhausted" ?

  15 septembre 2021, par user16909319

  Introduction :

  


  I'm working on a Discord Music Bot for personal use only. Basically, when I play a 2min song with the bot, it plays the song for 1min 30secs, then skips it and plays the next one in the queue. The error is shown below :

  


  


  Error in Pull Function
  
IO error : Error number -10054 occurred
  
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000018f86a6f4c0] Packet corrupt (stream = 0, dts = 11154432).
  
Input buffer exhausted before END element found
  
Invalid Data found when processing Input
  
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000018f86a6f4c0] stream 0, offset 0x3e805c : partial file

  


  


  The code block which I think is causing the problem :

  


  Search song method

  


      async def search_song(self, amount, song, get_url=False):
        info = await self.bot.loop.run_in_executor(None, lambda: youtube_dl.YoutubeDL(ytdl_format_options).extract_info(
            f"ytsearch{amount}:{song}", download=False, ie_key="YoutubeSearch"))
        if len(info["entries"]) == 0: return None

        return [entry["webpage_url"] for entry in info["entries"]] if get_url else info


  


  Play_song method

  


      async def play_song(self, ctx, song):
        url = pafy.new(song).getbestaudio().url
        ctx.voice_client.play(discord.PCMVolumeTransformer(discord.FFmpegPCMAudio(url, executable="C:/ffmpeg/bin/ffmpeg.exe")),
                              after=lambda error: self.bot.loop.create_task(self.check_queue(ctx)))
        ctx.voice_client.source.volume = 0.5


  


  Formatting Options I provided :

  


  ytdl_format_options = {
    'format': 'bestaudio/best',
    'outtmpl': '%(extractor)s-%(id)s-%(title)s.%(ext)s',
    'restrictfilenames': True,
    'noplaylist': True,
    'nocheckcertificate': True,
    'ignoreerrors': True,
    'logtostderr': False,
    'quiet': True,
    'no_warnings': True,
    'default_search': 'auto',
    'source_address': '0.0.0.0'
}


  


  Solutions that I've tried :

  


  

  • Running it on both Replit and locally.

  


  • Redownloading FFmpeg

  


  • Ensuring FFmpeg, pafy, and youtube_dl are all up to date.

  


  


  Things to Note :

  


  

  • Playing a 2mins song, it stops after 1min 30 seconds and displays the error above. (75% of the song)

  


  • Playing a 1hr song, it still continues after 10 minutes.

  


  


  I do not have much experience in this yet so I'm not entirely sure where in my code is actually causing this issue or other ways which I can use to test and fix the issue.