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GetID3 - Bloc informations de fichiers
9 avril 2013, par
Mis à jour : Mai 2013
Langue : français
Type : Image
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ffmpeg does not produce a slideshow
1er mai 2021, par ArekBulskiI need some help with ffmpeg. I cant crack this one at all. I have 7 png files ready. I need to make a slideshow out of it. But the mkv produced shows and closes. It does not play properly.


$ ffmpeg -framerate 1/5 -i temp-display-%08d.png -c:v libx265 temp-output.mkv

ffmpeg version 4.3.1-4ubuntu1 Copyright (c) 2000-2020 the FFmpeg developers
 built with gcc 10 (Ubuntu 10.2.0-9ubuntu2)
 configuration: --prefix=/usr --extra-version=4ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
 libavutil 56. 51.100 / 56. 51.100
 libavcodec 58. 91.100 / 58. 91.100
 libavformat 58. 45.100 / 58. 45.100
 libavdevice 58. 10.100 / 58. 10.100
 libavfilter 7. 85.100 / 7. 85.100
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 7.100 / 5. 7.100
 libswresample 3. 7.100 / 3. 7.100
 libpostproc 55. 7.100 / 55. 7.100
Input #0, image2, from 'temp-display-%08d.png':
 Duration: 00:00:35.00, start: 0.000000, bitrate: N/A
 Stream #0:0: Video: png, rgba(pc), 1080x1080 [SAR 3779:3779 DAR 1:1], 0.20 fps, 0.20 tbr, 0.20 tbn, 0.20 tbc
File 'temp-output.mkv' already exists. Overwrite? [y/N] y
Stream mapping:
 Stream #0:0 -> #0:0 (png (native) -> hevc (libx265))
Press [q] to stop, [?] for help
x265 [info]: HEVC encoder version 3.4
x265 [info]: build info [Linux][GCC 9.3.0][64 bit] 8bit+10bit+12bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX XOP FMA4 FMA3 BMI1
x265 [warning]: halving the quality when psy-rd is enabled for 444 input. Setting cbQpOffset = 6 and crQpOffset = 6
x265 [info]: Main 4:4:4 profile, Level-4 (Main tier)
x265 [info]: Thread pool created using 8 threads
x265 [info]: Slices : 1
x265 [info]: frame threads / pool features : 3 / wpp(17 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge : hex / 57 / 2 / 3
x265 [info]: Keyframe min / max / scenecut / bias : 1 / 250 / 40 / 5.00 
x265 [info]: Cb/Cr QP Offset : 6 / 6
x265 [info]: Lookahead / bframes / badapt : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 0
x265 [info]: References / ref-limit cu / depth : 3 / off / on
x265 [info]: AQ: mode / str / qg-size / cu-tree : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress : CRF-28.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip mode=1 signhide tmvp
x265 [info]: tools: b-intra strong-intra-smoothing lslices=6 deblock sao
Output #0, matroska, to 'temp-output.mkv':
 Metadata:
 encoder : Lavf58.45.100
 Stream #0:0: Video: hevc (libx265), gbrp, 1080x1080 [SAR 1:1 DAR 1:1], q=-1--1, 0.20 fps, 1k tbn, 0.20 tbc
 Metadata:
 encoder : Lavc58.91.100 libx265
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 7 fps=0.0 q=24.9 Lsize= 113kB time=00:00:20.00 bitrate= 46.1kbits/s speed=29.2x 
video:110kB audio:0kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 2.725160%
x265 [info]: frame I: 1, Avg QP:18.04 kb/s: 117.69 
x265 [info]: frame P: 3, Avg QP:20.62 kb/s: 15.70 
x265 [info]: frame B: 3, Avg QP:24.17 kb/s: 4.94 
x265 [info]: Weighted P-Frames: Y:33.3% UV:0.0%
x265 [info]: consecutive B-frames: 50.0% 25.0% 25.0% 0.0% 0.0% 


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offloading to ffmpeg via named pipes in c#/dotnet core
1er avril 2022, par bepI tried to break this down to the base elements so I hope this is clear. I want to take in a network stream, it may be a 1 way, it may be a protocol that requires 2 way communication, such as RTMP during handshake.


I want to pass that stream straight through to a spawned FFMPEG process. I then want to capture the output of FFMPEG, in this example I just want to pipe it out to a file. The file is not my end goal, but for simplicity if I can get that far I think I'll be ok.




I want the code to be as plain as possible and offload the core processing to FFMPEG. If I ask FFMPEG to output webrtc stream, a file, whatever, I just want to capture that. FFMPEG shouldn't be used directly, just indirectly via
IncomingConnectionHandler.

Only other component is OBS, which I am using to create the RTMP stream coming in.


As things stand now, running this results in the following error, which I'm a little unclear on. I don't feel like I'm causing concurrent reads at any point.


System.InvalidOperationException: Concurrent reads are not allowed
 at Medallion.Shell.Throw`1.If(Boolean condition, String message)
 at Medallion.Shell.Streams.Pipe.ReadAsync(Byte[] buffer, Int32 offset, Int32 count, TimeSpan timeout, CancellationToken cancellationToken)
 at Medallion.Shell.Streams.Pipe.PipeOutputStream.ReadAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)
 at System.IO.Stream.ReadAsync(Memory`1 buffer, CancellationToken cancellationToken)
 at System.IO.StreamReader.ReadBufferAsync(CancellationToken cancellationToken)
 at System.IO.StreamReader.ReadLineAsyncInternal()
 at Medallion.Shell.Streams.MergedLinesEnumerable.GetEnumeratorInternal()+MoveNext()
 at System.String.Join(String separator, IEnumerable`1 values)
 at VideoIngest.IncomingRtmpConnectionHandler.OnConnectedAsync(ConnectionContext connection) in Program.cs:line 55
 at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure.KestrelConnection`1.ExecuteAsync()


Code :


namespace VideoIngest
{
 public class IncomingRtmpConnectionHandler : ConnectionHandler
 {
 private readonly ILogger<incomingrtmpconnectionhandler> logger;

 public IncomingRtmpConnectionHandler(ILogger<incomingrtmpconnectionhandler> logger)
 {
 this.logger = logger;
 }

 public override async Task OnConnectedAsync(ConnectionContext connection)
 {
 logger?.LogInformation("connection started");

 var outputFileName = @"C:\Temp\bunny.mp4";

 var rtmpPassthroughPipeName = Guid.NewGuid().ToString();
 var cmdPath = @"C:\Opt\ffmpeg\bin\ffmpeg.exe";
 var cmdArgs = $"-i pipe:{rtmpPassthroughPipeName} -preset slow -c copy -f mp4 -y pipe:1";

 var cancellationToken = connection.ConnectionClosed;
 var rtmpStream = connection.Transport;

 using (var outputStream = new FileStream(outputFileName, FileMode.Create))
 using (var cmd = Command.Run(cmdPath, options: o => { o.StartInfo(i => i.Arguments = cmdArgs); o.CancellationToken(cancellationToken); }))
 {
 // create a pipe to pass the RTMP data straight to FFMPEG. This code should be dumb to proto etc being used
 var ffmpegPassthroughStream = new NamedPipeServerStream(rtmpPassthroughPipeName, PipeDirection.InOut, 10, PipeTransmissionMode.Byte, System.IO.Pipes.PipeOptions.Asynchronous);

 // take the network stream and pass data to/from ffmpeg process
 var fromFfmpegTask = ffmpegPassthroughStream.CopyToAsync(rtmpStream.Output.AsStream(), cancellationToken);
 var toFfmpegTask = rtmpStream.Input.AsStream().CopyToAsync(ffmpegPassthroughStream, cancellationToken);

 // take the ffmpeg process output (not stdout) into target file
 var outputTask = cmd.StandardOutput.PipeToAsync(outputStream);

 while (!outputTask.IsCompleted && !outputTask.IsCanceled)
 {
 var errs = cmd.GetOutputAndErrorLines();
 logger.LogInformation(string.Join(Environment.NewLine, errs));

 await Task.Delay(1000);
 }

 CommandResult result = result = cmd.Result;

 if (result != null && result.Success)
 {
 logger.LogInformation("Created file");
 }
 else
 {
 logger.LogError(result.StandardError);
 }
 }

 logger?.LogInformation("connection closed");
 }
 }

 public class Startup
 {
 public void ConfigureServices(IServiceCollection services) { }

 public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
 {
 app.Run(async (context) =>
 {
 var log = context.RequestServices.GetRequiredService>();
 await context.Response.WriteAsync("Hello World!");
 });
 }
 }

 public class Program
 {
 public static void Main(string[] args)
 {
 CreateHostBuilder(args).Build().Run();
 }

 public static IWebHostBuilder CreateHostBuilder(string[] args) =>
 WebHost
 .CreateDefaultBuilder(args)
 .ConfigureServices(services =>
 {
 services.AddLogging(options =>
 {
 options.AddDebug().AddConsole().SetMinimumLevel(LogLevel.Information);
 });
 })
 .UseKestrel(options =>
 {
 options.ListenAnyIP(15666, builder =>
 {
 builder.UseConnectionHandler<incomingrtmpconnectionhandler>();
 });

 options.ListenLocalhost(5000);

 // HTTPS 5001
 options.ListenLocalhost(5001, builder =>
 {
 builder.UseHttps();
 });
 })
 .UseStartup<startup>();
 }
 

}
</startup></incomingrtmpconnectionhandler></incomingrtmpconnectionhandler></incomingrtmpconnectionhandler>

Questions :


- 

- Is this a valid approach, do you see any fundamental issues ?
- Is the pipe naming correct, is the convention just
pipe:someName? - Any ideas on what specifically may be causing the
Concurrent reads are not allowed? - If #3 is solved, does the rest of this seem valid ?










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How to suppress `ffmpeg` output logging when using H.265 codec in quiet mode
5 avril 2022, par user223364When I run :-


ffmpeg -v quiet -i "${INPUT}" -c:v libx265 -crf 23 "${OUTPUT}"


I'm still getting output from the command even though the
loglevelis set tosilent(see the example of the output below)

x265 [info]: HEVC encoder version 3.5+20-17839cc0d
x265 [info]: build info [Mac OS X][clang 11.0.0][64 bit] 8bit+10bit+12bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
x265 [info]: Main profile, Level-3 (Main tier)
x265 [info]: Thread pool created using 4 threads
x265 [info]: Slices : 1
x265 [info]: frame threads / pool features : 2 / wpp(9 rows)
x265 [warning]: Source height < 720p; disabling lookahead-slices
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge : hex / 57 / 2 / 3
x265 [info]: Keyframe min / max / scenecut / bias : 25 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 0
x265 [info]: References / ref-limit cu / depth : 3 / off / on
x265 [info]: AQ: mode / str / qg-size / cu-tree : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress : CRF-23.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip mode=1 signhide tmvp
x265 [info]: tools: b-intra strong-intra-smoothing deblock sao


I'm using
v5offfmpeg

ffmpeg version 5.0-tessus https://evermeet.cx/ffmpeg/ Copyright (c) 2000-2022 the FFmpeg developers
 built with Apple clang version 11.0.0 (clang-1100.0.33.17)


How do I get
ffmpegto be really quiet ?

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