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vidcap file: added seek option

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This commit is contained in:
Martin Pulec
2023-06-13 11:38:01 +02:00
parent 87be38ed23
commit 5761bb8bbb
1 changed files with 18 additions and 1 deletions
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19
src/video_capture/file.c
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@@ -107,6 +107,7 @@ struct vidcap_state_lavf_decoder {
codec_t convert_to;
bool paused;
bool use_audio;
int seek_sec;
int video_stream_idx, audio_stream_idx;
int64_t last_vid_pts; ///< last played PTS, if PTS == PTS_NO_VALUE, DTS is stored instead
@@ -130,7 +131,7 @@ struct vidcap_state_lavf_decoder {
static void vidcap_file_show_help(bool full) {
color_printf("Usage:\n");
color_printf(TERM_BOLD TERM_FG_RED "\t-t file:<name>" TERM_FG_RESET "[:loop][:nodecode][:codec=<c>]%s\n" TERM_RESET,
color_printf(TERM_BOLD TERM_FG_RED "\t-t file:<name>" TERM_FG_RESET "[:loop][:nodecode][:codec=<c>][:seek=<sec>]%s\n" TERM_RESET,
full ? "[:opportunistic_audio][:queue=<len>][:threads=<n>[FS]]" : "");
color_printf("where\n");
color_printf(TERM_BOLD "\tloop\n" TERM_RESET);
@@ -435,6 +436,8 @@ static bool vidcap_file_parse_fmt(struct vidcap_state_lavf_decoder *s, const cha
s->thread_count = clampi(count, 0, INT_MAX);
s->thread_type = strchr(endptr, 'F') != NULL ? FF_THREAD_FRAME : 0;
s->thread_type |= strchr(endptr, 'S') != NULL ? FF_THREAD_SLICE : 0;
} else if (strstr(item, "seek=") == item) {
s->seek_sec = atoi(strchr(item, '=') + 1);
} else {
log_msg(LOG_LEVEL_ERROR, MOD_NAME "Unknown option: %s\n", item);
return false;
@@ -486,6 +489,19 @@ static void vidcap_file_should_exit(void *state) {
pthread_cond_signal(&s->paused_cv);
}
static void seek_start(struct vidcap_state_lavf_decoder *s) {
if (s->seek_sec <= 0) {
return;
}
AVStream *st = s->fmt_ctx->streams[s->video_stream_idx];
AVRational tb = st->time_base;
CHECK_FF(avformat_seek_file(s->fmt_ctx, s->video_stream_idx, INT64_MIN,
st->start_time + s->last_vid_pts +
s->seek_sec * tb.den / tb.num,
INT64_MAX, AVSEEK_FLAG_FRAME),
{});
}
#define CHECK(call) { int ret = call; if (ret != 0) abort(); }
static int vidcap_file_init(struct vidcap_params *params, void **state) {
bool opportunistic_audio = false; // do not fail if audio requested but not found
@@ -631,6 +647,7 @@ static int vidcap_file_init(struct vidcap_params *params, void **state) {
log_msg(LOG_LEVEL_VERBOSE, MOD_NAME "Capturing audio idx %d, video idx %d\n", s->audio_stream_idx, s->video_stream_idx);
s->last_vid_pts = s->fmt_ctx->streams[s->video_stream_idx]->start_time;
seek_start(s);
playback_register_keyboard_ctl(&s->mod);
register_should_exit_callback(&s->mod, vidcap_file_should_exit, s);