|
 |
Simon Lemieux wrote:
> ? Can you share one of your parameter files?
>
> Sure! Here this setting works for MPEG-2 stream and will give underuns and
> overruns if the frames Aren't 512x384...
Hmm, this set generates an MPEG-1; a nice looking, albeit large MPEG-1.
------------------------------------------------------------------------------------------------------------------------
> MPEG-1 Movie Sequence, 25 fps, no compression
yes, generates an MPEG-1; a nice looking, albeit large MPEG-1.
> render/alienTech.%05d /* name of source files */
> - /* name of reconstructed images ("-": don't store) */
> - /* name of intra quant matrix file ("-": default matrix) */
> - /* name of non intra quant matrix file ("-": default matrix) */
> stat.out /* name of statistics file ("-": stdout ) */
> 2 /* input picture file format: 0=*.Y,*.U,*.V, 1=*.yuv, 2=*.ppm */
> 100 /* number of frames */
> 0 /* number of first frame */
> 00:00:00:00 /* timecode of first frame */
> 1 /* N (# of frames in GOP) */
This sez to use only I frames (GOP size of 1). This will have the highest quality
and be quite large. (about 25x larger than using I, B, and P frames)
> 1 /* M (I/P frame distance) */
> 1 /* ISO/IEC 11172-2 stream */
This flag sez to generate an MPEG-1. From the docs:
187: /* ISO/IEC 11172-2 stream */
188:
189: Set to 1 if you want to generate an MPEG-1 sequence. In this
case some
190: of the subsequent MPEG-2 specific values are ignored.
> 0 /* 0:frame pictures, 1:field pictures */
> 512 /* horizontal_size */
> 384 /* vertical_size */
> 9 /* aspect_ratio_information 8=CCIR601 625 line, 9=CCIR601 525 line */
Interesting. My docs don't show 8/9 as legal values.
210: /* aspect_ratio_information */
211:
212: Defines the display aspect ratio. Legal values are:
213:
214: Code Meaning
215: ---- --------------
216: 1 square pels
217: 2 4:3 display
218: 3 16:9 display
219: 4 2.21:1 display
220:
221: MPEG-1 uses a different coding of aspect ratios. In this cases
codes
222: 1 to 14 are valid.
> 3 /* frame_rate_code 1=23.976, 2=24, 3=25, 4=29.97, 5=30 frames/sec. */
> 3000000.0 /* bit_rate (bits/s) */
3Mb/s is too high for an MPEG-1. I'm not sure if it internally forces it down to the
max
of 1.856Mb/s or if M$ Media Player doesn't care if its "overclocked".
> 20 /* vbv_buffer_size (in multiples of 16 kbit) */
20 is the correct value for the MPEG-1 vbv_buffer_size. MPEG-2 should be 112.
> 0 /* low_delay */
> 0 /* constrained_parameters_flag */
> 4 /* Profile ID: Simple = 5, Main = 4, SNR = 3, Spatial = 2, High = 1 */
> 8 /* Level ID: Low = 10, Main = 8, High 1440 = 6, High = 4 */
> 1 /* progressive_sequence */
> 1 /* chroma_format: 1=4:2:0, 2=4:2:2, 3=4:4:4 */
> 2 /* video_format: 0=comp., 1=PAL, 2=NTSC, 3=SECAM, 4=MAC, 5=unspec. */
> 5 /* color_primaries */
> 5 /* transfer_characteristics */
> 5 /* matrix_coefficients */
> 512 /* display_horizontal_size */
> 384 /* display_vertical_size */
> 0 /* intra_dc_precision (0: 8 bit, 1: 9 bit, 2: 10 bit, 3: 11 bit */
> 0 /* top_field_first */
> 1 1 1 /* frame_pred_frame_dct (I P B) */
> 0 0 0 /* concealment_motion_vectors (I P B) */
> 0 0 0 /* q_scale_type (I P B) */
> 0 0 0 /* intra_vlc_format (I P B)*/
> 0 0 0 /* alternate_scan (I P B) */
> 0 /* repeat_first_field */
> 1 /* progressive_frame */
> 0 /* P distance between complete intra slice refresh */
> 0 /* rate control: r (reaction parameter) */
> 0 /* rate control: avg_act (initial average activity) */
> 0 /* rate control: Xi (initial I frame global complexity measure) */
> 0 /* rate control: Xp (initial P frame global complexity measure) */
> 0 /* rate control: Xb (initial B frame global complexity measure) */
> 0 /* rate control: d0i (initial I frame virtual buffer fullness) */
> 0 /* rate control: d0p (initial P frame virtual buffer fullness) */
> 0 /* rate control: d0b (initial B frame virtual buffer fullness) */
> 2 2 11 11 /* P: forw_hor_f_code forw_vert_f_code search_width/height */
> 1 1 6 6 /* B1: forw_hor_f_code forw_vert_f_code search_width/height */
> 1 1 6 6 /* B1: back_hor_f_code back_vert_f_code search_width/height */
> 1 1 6 6 /* B2: forw_hor_f_code forw_vert_f_code search_width/height */
> 1 1 6 6 /* B2: back_hor_f_code back_vert_f_code search_width/height */
dik
Post a reply to this message
|
|
