static int yuv4_write_header(AVFormatContext *s) { int *first_pkt = s->priv_data; if (s->nb_streams != 1) return AVERROR(EIO); if (s->streams[0]->codecpar->codec_id != AV_CODEC_ID_WRAPPED_AVFRAME) { av_log(s, AV_LOG_ERROR, "ERROR: Codec not supported.\n"); return AVERROR_INVALIDDATA; } switch (s->streams[0]->codecpar->format) { case AV_PIX_FMT_YUV411P: av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV " "stream, some mjpegtools might not work.\n"); break; case AV_PIX_FMT_GRAY8: case AV_PIX_FMT_GRAY16: case AV_PIX_FMT_YUV420P: case AV_PIX_FMT_YUV422P: case AV_PIX_FMT_YUV444P: break; case AV_PIX_FMT_YUV420P9: case AV_PIX_FMT_YUV422P9: case AV_PIX_FMT_YUV444P9: case AV_PIX_FMT_YUV420P10: case AV_PIX_FMT_YUV422P10: case AV_PIX_FMT_YUV444P10: case AV_PIX_FMT_YUV420P12: case AV_PIX_FMT_YUV422P12: case AV_PIX_FMT_YUV444P12: case AV_PIX_FMT_YUV420P14: case AV_PIX_FMT_YUV422P14: case AV_PIX_FMT_YUV444P14: case AV_PIX_FMT_YUV420P16: case AV_PIX_FMT_YUV422P16: case AV_PIX_FMT_YUV444P16: if (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL) { av_log(s, AV_LOG_ERROR, "'%s' is not an official yuv4mpegpipe pixel format. " "Use '-strict -1' to encode to this pixel format.\n", av_get_pix_fmt_name(s->streams[0]->codecpar->format)); return AVERROR(EINVAL); } av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. " "Mjpegtools will not work.\n"); break; default: av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle " "yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. " "And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, " "yuv444p10, yuv422p10, yuv420p10, " "yuv444p12, yuv422p12, yuv420p12, " "yuv444p14, yuv422p14, yuv420p14, " "yuv444p16, yuv422p16, yuv420p16 " "and gray16 pixel formats. " "Use -pix_fmt to select one.\n"); return AVERROR(EIO); } *first_pkt = 1; return 0; }