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Use regex to check if ffmpeg output contains codec

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Demo of the regex: https://regex101.com/r/bn9IOy/10/
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Bond_009 2019-01-02 10:48:10 +01:00 committed by Vasily
parent 0042b96c80
commit 12c43cd769
1 changed files with 41 additions and 47 deletions
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88
MediaBrowser.MediaEncoding/Encoder/EncoderValidator.cs
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@ -2,6 +2,7 @@
using System.Collections.Generic; using System.Collections.Generic;
using System.Globalization; using System.Globalization;
using System.Linq; using System.Linq;
using System.Text.RegularExpressions;
using MediaBrowser.Model.Diagnostics; using MediaBrowser.Model.Diagnostics;
using Microsoft.Extensions.Logging; using Microsoft.Extensions.Logging;
@ -22,8 +23,8 @@ namespace MediaBrowser.MediaEncoding.Encoder
{ {
_logger.LogInformation("Validating media encoder at {EncoderPath}", encoderPath); _logger.LogInformation("Validating media encoder at {EncoderPath}", encoderPath);
var decoders = GetDecoders(encoderPath); var decoders = GetCodecs(encoderPath, Codec.Decoder);
var encoders = GetEncoders(encoderPath); var encoders = GetCodecs(encoderPath, Codec.Encoder);
_logger.LogInformation("Encoder validation complete"); _logger.LogInformation("Encoder validation complete");
@ -71,24 +72,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
return true; return true;
} }
private IEnumerable<string> GetDecoders(string encoderAppPath) private static readonly string[] requiredDecoders = new[]
{
string output = null;
try
{
output = GetProcessOutput(encoderAppPath, "-decoders");
}
catch (Exception ex)
{
_logger.LogError(ex, "Error detecting available decoders");
}
if (string.IsNullOrWhiteSpace(output))
{
return Enumerable.Empty<string>();
}
var required = new[]
{ {
"mpeg2video", "mpeg2video",
"h264_qsv", "h264_qsv",
@ -105,31 +89,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
"hevc" "hevc"
}; };
var found = required.Where(x => output.IndexOf(x, StringComparison.OrdinalIgnoreCase) != -1); private static readonly string[] requiredEncoders = new[]
_logger.LogInformation("Available decoders: {Codecs}", found);
return found;
}
private IEnumerable<string> GetEncoders(string encoderAppPath)
{
string output = null;
try
{
output = GetProcessOutput(encoderAppPath, "-encoders");
}
catch (Exception ex)
{
_logger.LogError(ex, "Error getting encoders");
}
if (string.IsNullOrWhiteSpace(output))
{
return Enumerable.Empty<string>();
}
var required = new[]
{ {
"libx264", "libx264",
"libx265", "libx265",
@ -153,9 +113,43 @@ namespace MediaBrowser.MediaEncoding.Encoder
"ac3" "ac3"
}; };
var found = required.Where(x => output.IndexOf(x, StringComparison.OrdinalIgnoreCase) != -1); private enum Codec
{
Encoder,
Decoder
}
_logger.LogInformation("Available encoders: {Codecs}", found); private IEnumerable<string> GetCodecs(string encoderAppPath, Codec codec)
{
string codecstr = codec == Codec.Encoder ? "encoders" : "decoders";
string output = null;
try
{
output = GetProcessOutput(encoderAppPath, "-" + codecstr);
}
catch (Exception ex)
{
_logger.LogError(ex, "Error detecting available {Codec}", codecstr);
}
if (string.IsNullOrWhiteSpace(output))
{
return Enumerable.Empty<string>();
}
var required = codec == Codec.Encoder ? requiredEncoders : requiredDecoders;
Regex regex = new Regex(@"\s\S{6}\s(?<codec>(\w|-)+)\s{3}");
MatchCollection matches = regex.Matches(output);
var found = matches.Cast<Match>()
.Select(x => x.Groups["codec"].Value)
.Where(x => required.Contains(x));
//var found = required.Where(x => output.IndexOf(x, StringComparison.OrdinalIgnoreCase) != -1);
_logger.LogInformation("Available {Codec}: {Codecs}", codecstr, found);
return found; return found;
} }