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  • An FFMpeg function on azure is not handling simultaneous calls (more than 5)

    9 novembre 2017, par The Lemon

    I created a c# httptrigger function on azure which uses FFMpeg to add subtitles to a video, and then just output the video locally (nothing fancy, all the files are in the local resources for the function, and the output is there as well). The process runs perfectly fine when I test it, I made a C# app to call the function and when I test the app it works fine as well. The only problem is when I tell the app to call the function several times at once it will only work for three or four simultaneous calls, any more than that will cause all of the calls to fail.
    Below is included the function code, the C# app code, and the partial output for successful calls and for failed calls. Any help or advice would be greatly appreciated as always. Regards Cuan

    note - the ffmpeg output from the azure function is largely omitted, as it produces output every few frames. I’ve included the start and the end of the output

    This is the C# method which is being run multiple times at once.

        public static async void callHTTP(string url, int num)
    
    {
    
        using (var client = new HttpClient())
    
        {
    
            client.Timeout = TimeSpan.FromMinutes(10);
    
            var content = new StringContent(JsonConvert.SerializeObject(" {\"name\": \"Azure\"}"), Encoding.UTF8, "application/json");
    
            System.TimeSpan tmp = DateTime.Now - time1;
    
            Console.WriteLine("Process {0} has started after time {1}", num + 1, tmp.ToString());
    
            var response = await client.PostAsync(url, content);
    
            tmp = DateTime.Now - time1;
    
            Console.WriteLine("Process {0} has finished after time {1}", num + 1, tmp.ToString());
    
            if (response.IsSuccessStatusCode)
    
            {
    
                Console.WriteLine("this is a reply");
    
                finished += 1;
    
                tmp = DateTime.Now - time1;
    
                Console.WriteLine("Runningtime for process {0} was {1}", num + 1, tmp.ToString());
    
            }
    

    
        }
    
    }

    This is the function being called

    using System.Net;
    
using System;
    
using System.Diagnostics;
    
using System.ComponentModel;
    

    

    
public static async Task<httpresponsemessage> Run(HttpRequestMessage req, TraceWriter log)
    
{
    

    
log.Info("C# HTTP trigger function processed a request.");
    
//Basic Parameters
    
    string ffmpegFile = @"D:\home\site\wwwroot\CommonResources\ffmpeg.exe";
    
    string outputpath = @"D:\home\site\wwwroot\ffmpeg_generic_webhook\output\";
    
    string reloutputpath = "output/";
    
    string relinputpath = "input/";
    
    string outputfile = "video2.mp4";
    
    string dir =  @"D:\home\site\wwwroot\ffmpeg_generic_webhook\";
    

    
//Special Parameters
    
    string videoFile = "1 minute basic.mp4";
    
    string sub = "1 minute sub.ass";
    
//guid tmp files
    
    string f1 = videoFile;
    
    string f2 = sub;
    
//guid output
    
    Guid g3 = Guid.NewGuid();
    
    string outputGuid = g3+".mp4";
    

    
//argument
    
    string tmp = subArg(f1, f2, outputGuid );
    
//String.Format("-i \"" + @"input/tmp.mp4" + "\" -vf \"ass = '" + sub + "'\" \"" + reloutputpath +outputfile + "\" ");
    
log.Info("ffmpeg argument is: "+tmp);
    

    

    
//startprocess parameters
    
Process process = new Process();
    
process.StartInfo.FileName = ffmpegFile;
    
process.StartInfo.Arguments =  tmp;
    
process.StartInfo.UseShellExecute = false;
    
process.StartInfo.RedirectStandardOutput = true;
    
process.StartInfo.RedirectStandardError = true;
    
process.StartInfo.WorkingDirectory = dir;
    
//output handler
    

    
process.OutputDataReceived += new DataReceivedEventHandler(
    
    (s, e) => 
    
    { 
    
        log.Info("O: "+e.Data);
    
    }
    
);
    
process.ErrorDataReceived += new DataReceivedEventHandler(
    
    (s, e) => 
    
    { 
    
        log.Info("E: "+e.Data);
    
    }
    
);
    
//start process
    
process.Start();
    
log.Info("process started");
    
process.BeginOutputReadLine();
    
process.BeginErrorReadLine();
    
process.WaitForExit();
    
log.Info("process has finished, deleting any tmp files and replying");
    
return req.CreateResponse(HttpStatusCode.OK, outputGuid);
    
}
    
</httpresponsemessage>

    The output for the failed set of calls (they all run together, so the output is a bit jumbled)

    2017-11-08T05:49:48.821 Function started (Id=1b2cc785-086d-495a-a994-3ee9b86bb926)
    
2017-11-08T05:49:48.834 Function started (Id=f0b9b383-b86b-4006-9e13-59861e2c0c35)
    
2017-11-08T05:49:48.834 Function started (Id=80c2a433-728e-42d3-804d-87461e369bd8)
    
2017-11-08T05:49:49.287 C# HTTP trigger function processed a request.
    
2017-11-08T05:49:49.287 ffmpeg argument is: -i "input/1 minute basic.mp4" -vf "ass = 'input/1 minute sub.ass'" "output/8ab2a4fd-39df-4da9-b0c5-5b33e95d6403.mp4"
    
2017-11-08T05:49:49.305 C# HTTP trigger function processed a request.
    
2017-11-08T05:49:49.305 ffmpeg argument is: -i "input/1 minute basic.mp4" -vf "ass = 'input/1 minute sub.ass'" "output/5805f054-db13-4154-8fe8-545161d2eb83.mp4"
    
2017-11-08T05:49:49.305 C# HTTP trigger function processed a request.
    
2017-11-08T05:49:49.305 ffmpeg argument is: -i "input/1 minute basic.mp4" -vf "ass = 'input/1 minute sub.ass'" "output/4275f98d-7a31-484c-960b-1e133056e895.mp4"
    
2017-11-08T05:49:49.381 process started
    
2017-11-08T05:49:49.428 process started
    
2017-11-08T05:49:49.491 E: ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers
    
2017-11-08T05:49:49.491 E:   built with gcc 7.1.0 (GCC)
    
2017-11-08T05:49:49.491 E:   configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
    
2017-11-08T05:49:49.491 E:   libavutil      55. 58.100 / 55. 58.100
    
2017-11-08T05:49:49.491 E:   libavcodec     57. 89.100 / 57. 89.100
    
2017-11-08T05:49:49.491 E:   libavformat    57. 71.100 / 57. 71.100
    
2017-11-08T05:49:49.491 E:   libavdevice    57.  6.100 / 57.  6.100
    
2017-11-08T05:49:49.491 E:   libavfilter     6. 82.100 /  6. 82.100
    
2017-11-08T05:49:49.491 E:   libswscale      4.  6.100 /  4.  6.100
    
2017-11-08T05:49:49.491 E:   libswresample   2.  7.100 /  2.  7.100
    
2017-11-08T05:49:49.491 E:   libpostproc    54.  5.100 / 54.  5.100
    
2017-11-08T05:49:49.522 process started
    
2017-11-08T05:49:49.570 E: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input/1 minute basic.mp4':
    
2017-11-08T05:49:49.570 E:   Metadata:
    
2017-11-08T05:49:49.570 E:     major_brand     : mp42
    
2017-11-08T05:49:49.570 E:     minor_version   : 0
    
2017-11-08T05:49:49.570 E:     compatible_brands: mp41isom
    
2017-11-08T05:49:49.570 E:     creation_time   : 2017-11-03T23:42:35.000000Z
    
2017-11-08T05:49:49.570 E:   Duration: 00:01:00.03, start: 0.000000, bitrate: 824 kb/s
    
2017-11-08T05:49:49.570 E:     Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 823 kb/s, 30.30 fps, 30.30 tbr, 30k tbn, 60 tbc (default)
    
2017-11-08T05:49:49.570 E:     Metadata:
    
2017-11-08T05:49:49.570 E:       creation_time   : 2017-11-03T23:42:35.000000Z
    
2017-11-08T05:49:49.570 E:       handler_name    : VideoHandler
    
2017-11-08T05:49:49.570 E:       encoder         : AVC Coding
    
2017-11-08T05:49:49.584 E: Stream mapping:
    
2017-11-08T05:49:49.584 E:   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
2017-11-08T05:49:49.584 E: Press [q] to stop, [?] for help
    
2017-11-08T05:49:49.615 E: [Parsed_ass_0 @ 000000000117ee60] Shaper: FriBidi 0.19.6 (SIMPLE)
    
2017-11-08T05:49:49.631 process started
    
2017-11-08T05:49:49.929 process started
    
2017-11-08T05:49:50.069 process started
    
2017-11-08T05:49:50.115 process started
    
2017-11-08T05:49:54.990 E: [Parsed_ass_0 @ 000000000117ee60] Using font provider directwrite
    
2017-11-08T05:49:54.990 E: [Parsed_ass_0 @ 000000000117ee60] Added subtitle file: 'input/1 minute sub.ass' (5 styles, 6 events)
    
2017-11-08T05:49:55.006 E: [Parsed_ass_0 @ 000000000117ee60] fontselect: (Arial, 700, 0) -> Arial-BoldMT, 0, Arial-BoldMT
    
2017-11-08T05:49:55.006 E: [libx264 @ 00000000004dd860] using SAR=1/1
    
2017-11-08T05:49:55.006 E: [libx264 @ 00000000004dd860] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
2017-11-08T05:49:55.022 E: [libx264 @ 00000000004dd860] profile High, level 3.2
    
2017-11-08T05:49:55.022 E: [libx264 @ 00000000004dd860] 264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - 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=1 lookahead_threads=1 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
    
2017-11-08T05:49:55.022 E: Output #0, mp4, to 'output/8ab2a4fd-39df-4da9-b0c5-5b33e95d6403.mp4':
    
2017-11-08T05:49:55.022 E:   Metadata:
    
2017-11-08T05:49:55.022 E:     major_brand     : mp42
    
2017-11-08T05:49:55.022 E:     minor_version   : 0
    
2017-11-08T05:49:55.022 E:     compatible_brands: mp41isom
    
2017-11-08T05:49:55.022 E:     encoder         : Lavf57.71.100
    
2017-11-08T05:49:55.022 E:     Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 30.30 fps, 16k tbn, 30.30 tbc (default)
    
2017-11-08T05:49:55.022 E:     Metadata:
    
2017-11-08T05:49:55.022 E:       creation_time   : 2017-11-03T23:42:35.000000Z
    
2017-11-08T05:49:55.022 E:       handler_name    : VideoHandler
    
2017-11-08T05:49:55.022 E:       encoder         : Lavc57.89.100 libx264
    
2017-11-08T05:49:55.022 E:     Side data:
    
2017-11-08T05:49:55.022 E:       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
2017-11-08T05:49:56.787 E: frame=    2 fps=0.4 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
    
2017-11-08T05:49:56.851 E: frame=    4 fps=0.6 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x

    lots of code omitted here, only showing one of the many calls failing due to character limit.

    2017-11-08T05:50:27.695 E: x264 [error]: malloc of size 3233984 failed
    
2017-11-08T05:50:27.695 E: Video encoding failed
    
2017-11-08T05:50:27.932 E: frame=  112 fps=3.0 q=29.0 size=      92kB time=00:00:02.24 bitrate= 335.9kbits/s speed=0.0598x
    
2017-11-08T05:50:28.132 E: Conversion failed!
    
2017-11-08T05:50:28.274 E: frame=  164 fps=4.3 q=29.0 size=      97kB time=00:00:03.96 bitrate= 201.0kbits/s speed=0.104x
    
2017-11-08T05:50:28.304 E: Conversion failed!
    
2017-11-08T05:50:28.304 E: Conversion failed!
    
2017-11-08T05:50:28.336 E: frame=  253 fps=6.6 q=29.0 size=     159kB time=00:00:06.89 bitrate= 189.0kbits/s speed=0.179x
    
2017-11-08T05:50:30.163 E: frame=   27 fps=0.7 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
    
2017-11-08T05:50:30.227 E: frame=   28 fps=0.7 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
    
2017-11-08T05:50:30.276 E:
    
2017-11-08T05:50:30.305 O:
    
2017-11-08T05:50:30.727 E: frame=   40 fps=1.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
    
2017-11-08T05:50:30.867 E: frame=  129 fps=3.2 q=29.0 size=      93kB time=00:00:02.80 bitrate= 272.3kbits/s speed=0.0693x
    
2017-11-08T05:50:30.929 E:
    
2017-11-08T05:50:30.929 O:
    
2017-11-08T05:50:30.929 E:
    
2017-11-08T05:50:30.948 O:
    
2017-11-08T05:50:31.290 E: frame=  178 fps=4.3 q=29.0 size=     116kB time=00:00:04.42 bitrate= 214.8kbits/s speed=0.108x
    
2017-11-08T05:50:31.822 E: frame=  133 fps=3.2 q=29.0 size=      94kB time=00:00:02.93 bitrate= 261.0kbits/s speed=0.0715x

    working example (only one call)

    2017-11-08T07:07:08.633 Function started (Id=5416410c-a185-44bd-8c9c-fc24efb80780)
    
2017-11-08T07:07:09.180 C# HTTP trigger function processed a request.
    
2017-11-08T07:07:09.180 ffmpeg argument is: -i "input/1 minute basic.mp4" -vf "ass = 'input/1 minute sub.ass'" "output/9a7af992-7202-45c6-a275-f71a184fc89b.mp4"
    
2017-11-08T07:07:09.508 process started
    
2017-11-08T07:07:10.992 E: ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers
    
2017-11-08T07:07:10.992 E:   built with gcc 7.1.0 (GCC)
    
2017-11-08T07:07:10.992 E:   configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
    
2017-11-08T07:07:11.367 E:   libavutil      55. 58.100 / 55. 58.100
    
2017-11-08T07:07:11.367 E:   libavcodec     57. 89.100 / 57. 89.100
    
2017-11-08T07:07:11.367 E:   libavformat    57. 71.100 / 57. 71.100
    
2017-11-08T07:07:11.367 E:   libavdevice    57.  6.100 / 57.  6.100
    
2017-11-08T07:07:11.367 E:   libavfilter     6. 82.100 /  6. 82.100
    
2017-11-08T07:07:11.367 E:   libswscale      4.  6.100 /  4.  6.100
    
2017-11-08T07:07:11.367 E:   libswresample   2.  7.100 /  2.  7.100
    
2017-11-08T07:07:11.367 E:   libpostproc    54.  5.100 / 54.  5.100
    
2017-11-08T07:07:12.977 E: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input/1 minute basic.mp4':
    
2017-11-08T07:07:12.977 E:   Metadata:
    
2017-11-08T07:07:12.977 E:     major_brand     : mp42
    
2017-11-08T07:07:12.977 E:     minor_version   : 0
    
2017-11-08T07:07:12.977 E:     compatible_brands: mp41isom
    
2017-11-08T07:07:12.977 E:     creation_time   : 2017-11-03T23:42:35.000000Z
    
2017-11-08T07:07:12.977 E:   Duration: 00:01:00.03, start: 0.000000, bitrate: 824 kb/s
    
2017-11-08T07:07:12.977 E:     Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 823 kb/s, 30.30 fps, 30.30 tbr, 30k tbn, 60 tbc (default)
    
2017-11-08T07:07:12.977 E:     Metadata:
    
2017-11-08T07:07:12.977 E:       creation_time   : 2017-11-03T23:42:35.000000Z
    
2017-11-08T07:07:12.977 E:       handler_name    : VideoHandler
    
2017-11-08T07:07:12.977 E:       encoder         : AVC Coding
    
2017-11-08T07:07:12.992 E: Stream mapping:
    
2017-11-08T07:07:13.008 E:   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
2017-11-08T07:07:13.008 E: Press [q] to stop, [?] for help
    
2017-11-08T07:07:13.320 E: [Parsed_ass_0 @ 000000000107ee60] Shaper: FriBidi 0.19.6 (SIMPLE)
    
2017-11-08T07:07:14.987 E: [Parsed_ass_0 @ 000000000107ee60] Using font provider directwrite
    
2017-11-08T07:07:15.143 E: [Parsed_ass_0 @ 000000000107ee60] Added subtitle file: 'input/1 minute sub.ass' (5 styles, 6 events)
    
2017-11-08T07:07:15.455 E: [Parsed_ass_0 @ 000000000107ee60] fontselect: (Arial, 700, 0) -> Arial-BoldMT, 0, Arial-BoldMT
    
2017-11-08T07:07:15.833 E: [libx264 @ 00000000004fd860] using SAR=1/1
    
2017-11-08T07:07:15.911 E: [libx264 @ 00000000004fd860] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
2017-11-08T07:07:15.973 E: [libx264 @ 00000000004fd860] profile High, level 3.2
    
2017-11-08T07:07:15.973 E: [libx264 @ 00000000004fd860] 264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - 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=1 lookahead_threads=1 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
    
2017-11-08T07:07:15.973 E: Output #0, mp4, to 'output/9a7af992-7202-45c6-a275-f71a184fc89b.mp4':
    
2017-11-08T07:07:15.973 E:   Metadata:
    
2017-11-08T07:07:15.973 E:     major_brand     : mp42
    
2017-11-08T07:07:15.973 E:     minor_version   : 0
    
2017-11-08T07:07:15.973 E:     compatible_brands: mp41isom
    
2017-11-08T07:07:15.973 E:     encoder         : Lavf57.71.100
    
2017-11-08T07:07:15.973 E:     Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 30.30 fps, 16k tbn, 30.30 tbc (default)
    
2017-11-08T07:07:15.973 E:     Metadata:
    
2017-11-08T07:07:15.973 E:       creation_time   : 2017-11-03T23:42:35.000000Z
    
2017-11-08T07:07:15.973 E:       handler_name    : VideoHandler
    
2017-11-08T07:07:15.973 E:       encoder         : Lavc57.89.100 libx264
    
2017-11-08T07:07:15.973 E:     Side data:
    
2017-11-08T07:07:15.973 E:       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
2017-11-08T07:07:16.137 E: frame=    2 fps=0.7 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
    
2017-11-08T07:07:16.528 E: frame=   21 fps=6.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
    
2017-11-08T07:07:17.622 E: frame=   43 fps=9.5 q=29.0 size=      34kB time=-00:00:00.03 bitrate=N/A speed=N/A
    
2017-11-08T07:07:18.122 E: frame=   46 fps=9.1 q=29.0 size=      35kB time=00:00:00.06 bitrate=4372.6kbits/s speed=0.013x

     omitted 

    2017-11-08T07:07:30.809 E: [Parsed_ass_0 @ 000000000107ee60] fontselect: (Arial, 400, 0) -> ArialMT, 0, ArialMT
    

    
2017-11-08T07:08:43.186 E: frame= 1819 fps= 20 q=29.0 Lsize=     992kB time=00:00:59.92 bitrate= 135.6kbits/s speed=0.665x
    
2017-11-08T07:08:43.186 E: video:971kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.171792%
    
2017-11-08T07:08:43.217 E: [libx264 @ 00000000004fd860] frame I:8     Avg QP:12.19  size: 44849
    
2017-11-08T07:08:43.217 E: [libx264 @ 00000000004fd860] frame P:532   Avg QP:16.00  size:   923
    
2017-11-08T07:08:43.217 E: [libx264 @ 00000000004fd860] frame B:1279  Avg QP:20.61  size:   112
    
2017-11-08T07:08:43.217 E: [libx264 @ 00000000004fd860] consecutive B-frames:  4.7%  0.8% 11.4% 83.1%
    
2017-11-08T07:08:43.217 E: [libx264 @ 00000000004fd860] mb I  I16..4: 49.2% 24.2% 26.7%
    
2017-11-08T07:08:43.217 E: [libx264 @ 00000000004fd860] mb P  I16..4:  0.2%  0.3%  0.1%  P16..4:  2.6%  0.3%  0.4%  0.0%  0.0%    skip:96.2%
    
2017-11-08T07:08:43.217 E: [libx264 @ 00000000004fd860] mb B  I16..4:  0.0%  0.1%  0.0%  B16..8:  2.1%  0.0%  0.0%  direct: 0.0%  skip:97.7%  L0:40.0% L1:59.7% BI: 0.3%
    
2017-11-08T07:08:43.233 E: [libx264 @ 00000000004fd860] 8x8 transform intra:39.3% inter:39.5%
    
2017-11-08T07:08:43.233 E: [libx264 @ 00000000004fd860] coded y,uvDC,uvAC intra: 16.3% 15.7% 8.8% inter: 0.5% 0.0% 0.0%
    
2017-11-08T07:08:43.233 E: [libx264 @ 00000000004fd860] i16 v,h,dc,p: 56% 31%  4%  9%
    
2017-11-08T07:08:43.233 E: [libx264 @ 00000000004fd860] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24%  9% 65%  1%  0%  0%  0%  0%  0%
    
2017-11-08T07:08:43.233 E: [libx264 @ 00000000004fd860] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 21% 15%  6%  6%  6%  4%  6%  4%
    
2017-11-08T07:08:43.233 E: [libx264 @ 00000000004fd860] i8c dc,h,v,p: 71% 16% 11%  1%
    
2017-11-08T07:08:43.233 E: [libx264 @ 00000000004fd860] Weighted P-Frames: Y:0.0% UV:0.0%
    
2017-11-08T07:08:43.233 E: [libx264 @ 00000000004fd860] ref P L0: 71.3% 12.7% 14.6%  1.4%
    
2017-11-08T07:08:43.233 E: [libx264 @ 00000000004fd860] ref B L0: 69.3% 29.3%  1.4%
    
2017-11-08T07:08:43.233 E: [libx264 @ 00000000004fd860] ref B L1: 97.0%  3.0%
    
2017-11-08T07:08:43.233 E: [libx264 @ 00000000004fd860] kb/s:132.38
    
2017-11-08T07:08:43.295 O:
    
2017-11-08T07:08:43.295 E:
    
2017-11-08T07:08:43.342 Function completed (Success, Id=5416410c-a185-44bd-8c9c-fc24efb80780, Duration=94698ms)

  • imdct15 : remove the AArch64 assembly

    4 janvier 2017, par Rostislav Pehlivanov
    imdct15 : remove the AArch64 assembly

    Prep work for the next commit, which will add a new FFT algorithm
    
which makes the iMDCT over 3x faster than it is currently (standalone,
    
the FFT is with some framesizes over 10x faster).
    

    The new FFT algorithm uses the already thouroughly SIMD’d power of two
    
FFT which already has SIMD for AArch64, so users of that platform will
    
still see an improvement.
    

    The previous FFT+SIMD was barely 2.5x faster than the C versions on these
    
platforms.
    

    Signed-off-by : Rostislav Pehlivanov <atomnuker@gmail.com>
    • [DH] libavcodec/aarch64/Makefile
    • [DH] libavcodec/aarch64/imdct15_init.c
    • [DH] libavcodec/aarch64/imdct15_neon.S
    • [DH] libavcodec/imdct15.c
    • [DH] libavcodec/imdct15.h

  • imdct15 : replace the FFT with a faster PFA FFT algorithm

    4 janvier 2017, par Rostislav Pehlivanov
    imdct15 : replace the FFT with a faster PFA FFT algorithm

    This commit replaces the current inefficient non-power-of-two FFT with a
    
much faster FFT based on the Prime Factor Algorithm.
    
Although it is already much faster than the old algorithm without SIMD,
    
the new algorithm makes use of the already very throughouly SIMD’d power
    
of two FFT, which improves performance even more across all platforms
    
which we have SIMD support for.
    

    Most of the work was done by Peter Barfuss, who passed the code to me to
    
implement into the iMDCT and the current codebase. The code for a
    
5-point and 15-point FFT was derived from the previous implementation,
    
although it was optimized and simplified, which will make its future
    
SIMD easier. The 15-point FFT is currently using 6% of the current
    
overall decoder overhead.
    

    The FFT can now easily be used as a forward transform by simply not
    
multiplying the 5-point FFT’s imaginary component by -1 (which comes
    
from the fact that changing the complex exponential’s angle by -1 also
    
changes the output by that) and by multiplying the "theta" angle of the
    
main exptab by -1. Hence the deliberately left multiplication by -1 at
    
the end.
    

    FATE passes, and performance reports on other platforms/CPUs are
    
welcome.
    

    Performance comparisons :
    

    iMDCT, PFA :
    
101127 decicycles in speed,   32765 runs,      3 skips
    
iMDCT, Old :
    
211022 decicycles in speed,   32768 runs,      0 skips
    

    Standalone FFT, 300000 transforms of size 960 :
    
    PFA        Old FFT     kiss_fft    libfftw3f
    
    3.659695s, 15.726912s, 13.300789s, 1.182222s
    

    Being only 3x slower than libfftw3f is a big achievement by itself.
    

    There appears to be something capping the performance in the iMDCT side
    
of things, possibly during the pre-stage reindexing. However, it is
    
certainly fast enough for now.
    

    Signed-off-by : Rostislav Pehlivanov <atomnuker@gmail.com>
    • [DH] libavcodec/imdct15.c
    • [DH] libavcodec/imdct15.h

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