* @param log_ctx log context
* @return >= 0 in case of success, a negative AVERROR code on error
*/
+av_warn_unused_result
int ff_parse_pixel_format(enum AVPixelFormat *ret, const char *arg, void *log_ctx);
/**
* @param log_ctx log context
* @return >= 0 in case of success, a negative AVERROR code on error
*/
+av_warn_unused_result
int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx);
/**
* @param log_ctx log context
* @return >= 0 in case of success, a negative AVERROR code on error
*/
+av_warn_unused_result
int ff_parse_time_base(AVRational *ret, const char *arg, void *log_ctx);
/**
* @param log_ctx log context
* @return >= 0 in case of success, a negative AVERROR code on error
*/
+av_warn_unused_result
int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx);
/**
* @param log_ctx log context
* @return >= 0 in case of success, a negative AVERROR code on error
*/
+av_warn_unused_result
int ff_parse_channel_layout(int64_t *ret, int *nret, const char *arg,
void *log_ctx);