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TAV: output FPS conversion

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This commit is contained in:
minjaesong
2025-12-16 18:05:12 +09:00
parent 67413f2749
commit 3a19b6aea8
2 changed files with 95 additions and 23 deletions
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54
video_encoder/src/encoder_tav_dt.c
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@@ -178,6 +178,8 @@ typedef struct {
int height;
int fps_num;
int fps_den;
int target_fps_num; // Target output framerate numerator (0 = no conversion)
int target_fps_den; // Target output framerate denominator
int is_interlaced;
int is_pal;
int quality_index;
@@ -230,6 +232,7 @@ static void print_usage(const char *program) {
printf(" -o, --output FILE Output TAV-DT file\n");
printf("\nOptions:\n");
printf(" -q, --quality N Quality level 0-5 (default: 3)\n");
printf(" -f, --fps NUM/DEN Output framerate (e.g., 30/1, 24000/1001)\n");
printf(" --ntsc Force NTSC format (720x480, default)\n");
printf(" --pal Force PAL format (720x576)\n");
printf(" --interlaced Interlaced output\n");
@@ -431,10 +434,18 @@ static FILE *spawn_ffmpeg_video(dt_encoder_t *enc, pid_t *pid) {
char video_size[32];
snprintf(video_size, sizeof(video_size), "%dx%d", enc->width, enc->height);
// Build fps filter prefix if conversion is requested
char fps_filter[64] = "";
if (enc->target_fps_num > 0 && enc->target_fps_den > 0) {
snprintf(fps_filter, sizeof(fps_filter), "fps=%d/%d,",
enc->target_fps_num, enc->target_fps_den);
}
// Use same filtergraph as reference TAV encoder
char vf[256];
char vf[320];
snprintf(vf, sizeof(vf),
"scale=%d:%d:force_original_aspect_ratio=increase,crop=%d:%d%s",
"%sscale=%d:%d:force_original_aspect_ratio=increase,crop=%d:%d%s",
fps_filter,
enc->width, enc->height, enc->width, enc->height,
enc->is_interlaced ? ",setfield=tff" : "");
@@ -1295,6 +1306,7 @@ int main(int argc, char **argv) {
{"input", required_argument, 0, 'i'},
{"output", required_argument, 0, 'o'},
{"quality", required_argument, 0, 'q'},
{"fps", required_argument, 0, 'f'},
{"threads", required_argument, 0, 't'},
{"ntsc", no_argument, 0, 'N'},
{"pal", no_argument, 0, 'P'},
@@ -1307,7 +1319,7 @@ int main(int argc, char **argv) {
};
int opt;
while ((opt = getopt_long(argc, argv, "i:o:q:t:vhNPI", long_options, NULL)) != -1) {
while ((opt = getopt_long(argc, argv, "i:o:q:f:t:vhNPI", long_options, NULL)) != -1) {
switch (opt) {
case 'i':
enc.input_file = optarg;
@@ -1320,6 +1332,18 @@ int main(int argc, char **argv) {
if (enc.quality_index < 0) enc.quality_index = 0;
if (enc.quality_index > 5) enc.quality_index = 5;
break;
case 'f': {
int num, den = 1;
if (sscanf(optarg, "%d/%d", &num, &den) < 1) {
fprintf(stderr, "Error: Invalid fps format. Use NUM or NUM/DEN\n");
return 1;
}
enc.target_fps_num = num;
enc.target_fps_den = den;
enc.fps_num = num;
enc.fps_den = den;
break;
}
case 't': {
int threads = atoi(optarg);
if (threads < 0) {
@@ -1367,6 +1391,7 @@ int main(int argc, char **argv) {
}
// Probe input file for framerate
int original_fps_num = 24, original_fps_den = 1;
char probe_cmd[4096];
snprintf(probe_cmd, sizeof(probe_cmd),
"ffprobe -v error -select_streams v:0 -show_entries stream=r_frame_rate -of default=nw=1:nk=1 '%s'",
@@ -1376,20 +1401,35 @@ int main(int argc, char **argv) {
if (probe) {
char line[256];
if (fgets(line, sizeof(line), probe)) {
if (sscanf(line, "%d/%d", &enc.fps_num, &enc.fps_den) != 2) {
enc.fps_num = 24;
enc.fps_den = 1;
if (sscanf(line, "%d/%d", &original_fps_num, &original_fps_den) != 2) {
original_fps_num = 24;
original_fps_den = 1;
}
}
pclose(probe);
}
// If user didn't specify target fps, use probed fps
if (enc.target_fps_num == 0) {
enc.fps_num = original_fps_num;
enc.fps_den = original_fps_den;
}
printf("\nTAV-DT Encoder (Revised Spec 2025-12-11)\n");
printf(" Format: %s %s\n", enc.is_pal ? "PAL" : "NTSC",
enc.is_interlaced ? "interlaced" : "progressive");
printf(" Resolution: %dx%d (internal: %dx%d)\n", enc.width, enc.height,
enc.width, enc.is_interlaced ? enc.height / 2 : enc.height);
printf(" Framerate: %d/%d\n", enc.fps_num, enc.fps_den);
// Report fps conversion if enabled
if (enc.target_fps_num > 0 &&
(enc.target_fps_num != original_fps_num || enc.target_fps_den != original_fps_den)) {
printf(" Framerate: %d/%d -> %d/%d (conversion)\n",
original_fps_num, original_fps_den,
enc.target_fps_num, enc.target_fps_den);
} else {
printf(" Framerate: %d/%d\n", enc.fps_num, enc.fps_den);
}
printf(" Quality: %d\n", enc.quality_index);
printf(" GOP size: %d\n", DT_GOP_SIZE);
printf(" Payload FEC: %s\n", enc.fec_mode == FEC_MODE_LDPC ? "LDPC(255,223)" : "RS(255,223)");