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annotate third_party/ffmpeg/ffmpeg_cli.c @ 267:a78f5986011f

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discover bundled production runtimes Locate Bazel-packaged Copilot and Python binaries by stable suffix instead of hardcoding an external repository prefix. Co-authored-by: Copilot <[email protected]>
author MrJuneJune <me@mrjunejune.com>
date Fri, 07 Aug 2026 12:58:55 -0700
parents 543df0fe7168
children
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1 #include "third_party/ffmpeg/ffmpeg_cli.h"
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2
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3 #include <errno.h>
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4 #include <stdarg.h>
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5 #include <stdio.h>
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6 #include <stdlib.h>
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7 #include <string.h>
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8 #include <sys/stat.h>
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9 #include <sys/types.h>
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10 #include <sys/wait.h>
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11 #include <unistd.h>
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12
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13 #define MAX_ERROR_LENGTH 512
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14 #define MAX_PATH_LENGTH 1024
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15
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16 static char g_last_error[MAX_ERROR_LENGTH];
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17
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18 static void set_error(const char *format, ...)
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19 {
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20 va_list arguments;
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21 va_start(arguments, format);
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22 vsnprintf(g_last_error, sizeof(g_last_error), format, arguments);
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23 va_end(arguments);
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24 }
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25
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26 static bool file_exists(const char *path)
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27 {
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28 struct stat status;
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29 return path && stat(path, &status) == 0 && S_ISREG(status.st_mode);
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30 }
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31
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32 static bool ensure_directory(const char *path)
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33 {
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34 struct stat status;
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35 if (stat(path, &status) == 0)
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36 return S_ISDIR(status.st_mode);
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37 return mkdir(path, 0755) == 0;
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38 }
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39
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40 static int run_process(char *const arguments[])
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41 {
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42 pid_t child = fork();
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43 if (child < 0)
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44 {
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45 set_error("fork failed: %s", strerror(errno));
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46 return -1;
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47 }
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48 if (child == 0)
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49 {
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50 execvp(arguments[0], arguments);
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51 _exit(127);
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52 }
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53
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54 int status = 0;
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55 while (waitpid(child, &status, 0) < 0)
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56 {
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57 if (errno == EINTR)
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58 continue;
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59 set_error("waitpid failed: %s", strerror(errno));
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60 return -1;
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61 }
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62 if (!WIFEXITED(status))
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63 return -1;
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64 return WEXITSTATUS(status);
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65 }
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66
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67 Fmp4HlsOpts ffmpeg_fmp4_hls_opts_default(void)
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68 {
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69 return (Fmp4HlsOpts){
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70 .segment_duration = 2,
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71 .video_bitrate = 900,
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72 .audio_bitrate = 96,
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73 .max_width = 960,
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74 .max_height = 720,
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75 .include_audio = true,
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76 .use_mpeg_ts = false,
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77 .codec = FFMPEG_HLS_VP9_OPUS,
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78 };
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79 }
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80
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81 bool ffmpeg_is_available(void)
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82 {
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83 char *const arguments[] = {
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84 "ffmpeg", "-version", NULL,
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85 };
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86 return run_process(arguments) == 0;
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87 }
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88
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89 const char *ffmpeg_last_error(void)
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90 {
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91 return g_last_error;
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92 }
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93
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94 FfmpegResult ffmpeg_video_to_fmp4_hls(
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95 const char *input_path,
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96 const char *output_dir,
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97 const char *name,
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98 const Fmp4HlsOpts *options)
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99 {
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100 if (!input_path || !output_dir || !name || name[0] == '\0')
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101 {
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102 set_error("input path, output directory, and name are required");
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103 return FFMPEG_ERR_INVALID_ARGS;
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104 }
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105 if (!file_exists(input_path))
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106 {
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107 set_error("input file not found: %s", input_path);
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108 return FFMPEG_ERR_INPUT_NOT_FOUND;
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109 }
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110 if (!ensure_directory(output_dir))
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111 {
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112 set_error("unable to create output directory: %s", output_dir);
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113 return FFMPEG_ERR_OUTPUT_FAILED;
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114 }
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115
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116 Fmp4HlsOpts defaults = ffmpeg_fmp4_hls_opts_default();
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117 const Fmp4HlsOpts *opts = options ? options : &defaults;
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118 if (opts->segment_duration <= 0 ||
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119 opts->video_bitrate <= 0 ||
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120 opts->max_width <= 0 ||
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121 opts->max_height <= 0)
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122 {
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123 set_error("invalid fMP4 HLS options");
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124 return FFMPEG_ERR_INVALID_ARGS;
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125 }
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126
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127 char playlist_path[MAX_PATH_LENGTH];
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128 char init_name[256];
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129 char segment_pattern[MAX_PATH_LENGTH];
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130 char segment_duration[16];
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131 char video_bitrate[32];
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132 char audio_bitrate[32];
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133 char keyframe_expression[32];
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134 char scale_filter[256];
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135
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136 snprintf(
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137 playlist_path,
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138 sizeof(playlist_path),
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139 "%s/%s-stream.m3u8",
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140 output_dir,
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141 name);
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142 snprintf(init_name, sizeof(init_name), "%s-init.mp4", name);
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143 snprintf(
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144 segment_pattern,
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145 sizeof(segment_pattern),
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146 "%s/%s-segment%%03d.%s",
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147 output_dir,
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148 name,
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149 opts->use_mpeg_ts ? "ts" : "m4s");
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150 snprintf(segment_duration, sizeof(segment_duration), "%d", opts->segment_duration);
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151 snprintf(video_bitrate, sizeof(video_bitrate), "%dk", opts->video_bitrate);
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152 snprintf(audio_bitrate, sizeof(audio_bitrate), "%dk", opts->audio_bitrate);
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153 snprintf(
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
154 keyframe_expression,
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
155 sizeof(keyframe_expression),
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
156 "expr:gte(t,n_forced*%d)",
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
157 opts->segment_duration);
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
158 snprintf(
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
159 scale_filter,
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
160 sizeof(scale_filter),
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
161 "scale=w='min(iw,%d)':h='min(ih,%d)':force_original_aspect_ratio=decrease,"
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
162 "scale=trunc(iw/2)*2:trunc(ih/2)*2",
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
163 opts->max_width,
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
164 opts->max_height);
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parents:
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165
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MrJuneJune <me@mrjunejune.com>
parents:
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166 char *arguments[48];
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parents:
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167 size_t count = 0;
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MrJuneJune <me@mrjunejune.com>
parents:
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168 #define ADD_ARGUMENT(value) arguments[count++] = (char *)(value)
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parents:
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169 ADD_ARGUMENT("ffmpeg");
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MrJuneJune <me@mrjunejune.com>
parents:
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170 ADD_ARGUMENT("-hide_banner");
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MrJuneJune <me@mrjunejune.com>
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171 ADD_ARGUMENT("-loglevel");
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parents:
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172 ADD_ARGUMENT("error");
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MrJuneJune <me@mrjunejune.com>
parents:
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173 ADD_ARGUMENT("-nostdin");
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MrJuneJune <me@mrjunejune.com>
parents:
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174 ADD_ARGUMENT("-y");
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MrJuneJune <me@mrjunejune.com>
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175 ADD_ARGUMENT("-i");
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MrJuneJune <me@mrjunejune.com>
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176 ADD_ARGUMENT(input_path);
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MrJuneJune <me@mrjunejune.com>
parents:
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177 ADD_ARGUMENT("-map");
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MrJuneJune <me@mrjunejune.com>
parents:
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178 ADD_ARGUMENT("0:v:0");
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parents:
diff changeset
179 if (opts->include_audio)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
180 {
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
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181 ADD_ARGUMENT("-map");
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MrJuneJune <me@mrjunejune.com>
parents:
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182 ADD_ARGUMENT("0:a:0?");
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MrJuneJune <me@mrjunejune.com>
parents:
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183 }
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parents:
diff changeset
184 ADD_ARGUMENT("-c:v");
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MrJuneJune <me@mrjunejune.com>
parents:
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185 if (opts->codec == FFMPEG_HLS_H264_AAC)
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
186 {
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diff changeset
187 ADD_ARGUMENT("libx264");
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188 ADD_ARGUMENT("-preset");
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MrJuneJune <me@mrjunejune.com>
parents:
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189 ADD_ARGUMENT("medium");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
190 ADD_ARGUMENT("-profile:v");
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MrJuneJune <me@mrjunejune.com>
parents:
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191 ADD_ARGUMENT("main");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
192 ADD_ARGUMENT("-level:v");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
193 ADD_ARGUMENT("3.1");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
194 }
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parents:
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195 else
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
196 {
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
197 ADD_ARGUMENT("libvpx-vp9");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
198 ADD_ARGUMENT("-deadline");
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diff changeset
199 ADD_ARGUMENT("good");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
200 ADD_ARGUMENT("-cpu-used");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
201 ADD_ARGUMENT("4");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
202 }
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
203 ADD_ARGUMENT("-pix_fmt");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
204 ADD_ARGUMENT("yuv420p");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
205 ADD_ARGUMENT("-b:v");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
206 ADD_ARGUMENT(video_bitrate);
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
207 ADD_ARGUMENT("-vf");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
208 ADD_ARGUMENT(scale_filter);
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
209 ADD_ARGUMENT("-force_key_frames");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
210 ADD_ARGUMENT(keyframe_expression);
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
211 if (opts->include_audio)
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
212 {
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
213 ADD_ARGUMENT("-c:a");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
214 ADD_ARGUMENT(
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
215 opts->codec == FFMPEG_HLS_H264_AAC
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
216 ? "aac"
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
217 : "libopus");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
218 ADD_ARGUMENT("-b:a");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
219 ADD_ARGUMENT(audio_bitrate);
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
220 }
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
221 else
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
222 {
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
223 ADD_ARGUMENT("-an");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
224 }
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
225 ADD_ARGUMENT("-f");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
226 ADD_ARGUMENT("hls");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
227 ADD_ARGUMENT("-hls_time");
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MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
228 ADD_ARGUMENT(segment_duration);
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
229 ADD_ARGUMENT("-hls_playlist_type");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
230 ADD_ARGUMENT("vod");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
231 if (!opts->use_mpeg_ts)
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
232 {
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
233 ADD_ARGUMENT("-hls_segment_type");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
234 ADD_ARGUMENT("fmp4");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
235 ADD_ARGUMENT("-hls_fmp4_init_filename");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
236 ADD_ARGUMENT(init_name);
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
237 }
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
238 ADD_ARGUMENT("-hls_segment_filename");
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
239 ADD_ARGUMENT(segment_pattern);
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
240 ADD_ARGUMENT(playlist_path);
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
241 arguments[count] = NULL;
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
242 #undef ADD_ARGUMENT
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
243
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
244 int result = run_process(arguments);
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
245 if (result != 0)
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
246 {
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
247 set_error("ffmpeg HLS conversion failed with exit code %d", result);
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
248 return FFMPEG_ERR_PROCESS_FAILED;
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
249 }
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
250 if (!file_exists(playlist_path))
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
251 {
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
252 set_error("playlist was not created: %s", playlist_path);
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
253 return FFMPEG_ERR_OUTPUT_FAILED;
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
254 }
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
255
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
256 return FFMPEG_OK;
543df0fe7168 [tools] Add full HLS player support
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
257 }