In libx264 wrapper, correctly support 2pass log filename option.

ffmpeg.c

@@ -207,7 +207,7 @@ static int do_hex_dump = 0;
 static int do_pkt_dump = 0;
 static int do_psnr = 0;
 static int do_pass = 0;
-static char *pass_logfilename_prefix = NULL;
+static const char *pass_logfilename_prefix;
 static int audio_stream_copy = 0;
 static int video_stream_copy = 0;
 static int subtitle_stream_copy = 0;
@@ -2331,7 +2331,7 @@ static int transcode(AVFormatContext **output_files,
                 break;
             }
             /* two pass mode */
-            if (ost->encoding_needed &&
+            if (ost->encoding_needed && codec->codec_id != CODEC_ID_H264 &&
                 (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
                 char logfilename[1024];
                 FILE *f;
@@ -4268,6 +4268,12 @@ static void log_callback_null(void* ptr, int level, const char* fmt, va_list vl)
 {
 }
 
+static void opt_passlogfile(const char *arg)
+{
+    pass_logfilename_prefix = arg;
+    opt_default("passlogfile", arg);
+}
+
 static const OptionDef options[] = {
     /* main options */
 #include "cmdutils_common_opts.h"
@@ -4341,7 +4347,7 @@ static const OptionDef options[] = {
     { "sameq", OPT_BOOL | OPT_VIDEO, {(void*)&same_quality},
       "use same quantizer as source (implies VBR)" },
     { "pass", HAS_ARG | OPT_FUNC2 | OPT_VIDEO, {(void*)opt_pass}, "select the pass number (1 or 2)", "n" },
-    { "passlogfile", HAS_ARG | OPT_STRING | OPT_VIDEO, {(void*)&pass_logfilename_prefix}, "select two pass log file name prefix", "prefix" },
+    { "passlogfile", HAS_ARG | OPT_VIDEO, {(void*)&opt_passlogfile}, "select two pass log file name prefix", "prefix" },
     { "deinterlace", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&do_deinterlace},
       "deinterlace pictures" },
     { "psnr", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&do_psnr}, "calculate PSNR of compressed frames" },

libavcodec/libx264.c

@@ -40,6 +40,7 @@ typedef struct X264Context {
     const char *profile;
     const char *level;
     int fastfirstpass;
+    const char *stats;
 } X264Context;
 
 static void X264_log(void *p, int level, const char *fmt, va_list args)
@@ -164,6 +165,15 @@ static av_cold int X264_close(AVCodecContext *avctx)
     return 0;
 }
 
+#define OPT_STR(opt, param)                                             \
+    do {                                                                \
+        if (param && x264_param_parse(&x4->params, opt, param) < 0) {   \
+            av_log(avctx, AV_LOG_ERROR,                                 \
+                   "bad value for '%s': '%s'\n", opt, param);           \
+            return -1;                                                  \
+        }                                                               \
+    } while (0);                                                        \
+
 #define OPT_STR(opt, param)                                             \
     do {                                                                \
         if (param && x264_param_parse(&x4->params, opt, param) < 0) {   \
@@ -291,6 +301,8 @@ static av_cold int X264_init(AVCodecContext *avctx)
         }
     }
 
+    OPT_STR("stats", x4->stats);
+
     // if neither crf nor cqp modes are selected we have to enable the RC
     // we do it this way because we cannot check if the bitrate has been set
     if (!(avctx->crf || (avctx->cqp > -1)))
@@ -371,6 +383,7 @@ static const AVOption options[] = {
     {"fastfirstpass", "Use fast settings when encoding first pass", OFFSET(fastfirstpass), FF_OPT_TYPE_INT, 1, 0, 1, VE},
     {"profile", "Set profile restrictions", OFFSET(profile), FF_OPT_TYPE_STRING, 0, 0, 0, VE},
     {"level", "Specify level (as defined by Annex A)", OFFSET(level), FF_OPT_TYPE_STRING, 0, 0, 0, VE},
+    {"passlogfile", "Filename for 2 pass stats", OFFSET(stats), FF_OPT_TYPE_STRING, 0, 0, 0, VE},
     { NULL },
 };