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Old 21st November 2015, 13:06   #1  |  Link
EEdcom
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Join Date: Dec 2009
Posts: 5
Cannot playback mpeg-2 encoded video

Hello all,

I have difficulties, when I am trying to playback mpeg-2 encoded video. I am able to see only first frame of encoded video. Video size is 5.2MB, so there sould be more than one frame. Am I using wrong video encoder parameters (wrong .PAR file)? Or maybe something is wrong with uncompressed .YUV data stream? I am purposely using original (almost 20 years old) MPEG2 encoder, because I am diving into MPEG-2 Part2 standard.

Resulting output video and statics file can be found here:
https://www.dropbox.com/sh/vvxuxfzbr...1vFLlMGia?dl=0

The produced video should follow the PAL system standard and be displayed on computer screen.

My display specification is following:
Code:
xrandr
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 8192 x 8192
VGA-0 disconnected (normal left inverted right x axis y axis)
LVDS connected primary 1680x1050+0+0 (normal left inverted right x axis y axis) 365mm x 228mm 
1680x1050     58.79*+
1400x1050     59.98  
1280x1024     59.89
...
S-video disconnected (normal left inverted right x axis y axis)
DVI-0 disconnected (normal left inverted right x axis y axis)
Here is the setup which I used in the experimets:

Source video: uncompressed .YUV file, including in total 200 "Big Buck Bunny" .png images.
Link: http://media.xiph.org/BBB/BBB-360-png/

Following command was used in converting:
Code:
png2yuv -j big_buck_bunny_%05d.png -f 24 -I p -b 13000 -n 200 > result.yuv
Used encoder: Original MPEG-2 Encoder / Decoder, Version 1.2, July 19, 1996, MPEG Software Simulation Group,
Link: http://rpm.pbone.net/index.php3/stat....i386.rpm.html

Used (.PAR) parameter file:
Code:
MPEG-2 Test Sequence, 24 frames/sec
result    /* 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 ) */
1         /* input picture file format: 0=*.Y,*.U,*.V, 1=*.yuv, 2=*.ppm */ 
200       /* number of frames */
0         /* number of first frame */
00:00:00:00 /* timecode of first frame */
12        /* N (# of frames in GOP) */
3         /* M (I/P frame distance) */
0         /* ISO/IEC 11172-2 stream */
0         /* 0:frame pictures, 1:field pictures */
640       /* horizontal_size */
360       /* vertical_size */
1         /* aspect_ratio_information 1=square pel, 2=4:3, 3=16:9, 4=2.11:1 */
2         /* frame_rate_code 1=23.976, 2=24, 3=25, 4=29.97, 5=30 frames/sec. */
5000000.0 /* bit_rate (bits/s) */
112       /* vbv_buffer_size (in multiples of 16 kbit) */
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          */
0         /* progressive_sequence */
1         /* chroma_format: 1=4:2:0, 2=4:2:2, 3=4:4:4 */
1         /* video_format: 0=comp., 1=PAL, 2=NTSC, 3=SECAM, 4=MAC, 5=unspec. */
5         /* color_primaries */
5         /* transfer_characteristics */
5         /* matrix_coefficients */
704       /* display_horizontal_size */
576       /* display_vertical_size */
0         /* intra_dc_precision (0: 8 bit, 1: 9 bit, 2: 10 bit, 3: 11 bit */
1         /* top_field_first */
0 0 0     /* frame_pred_frame_dct (I P B) */
0 0 0     /* concealment_motion_vectors (I P B) */
1 1 1     /* q_scale_type  (I P B) */
1 0 0     /* intra_vlc_format (I P B)*/
0 0 0     /* alternate_scan (I P B) */
0         /* repeat_first_field */
0         /* 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 3  3  /* B1: forw_hor_f_code forw_vert_f_code search_width/height */
1 1 7  7  /* B1: back_hor_f_code back_vert_f_code search_width/height */
1 1 7  7  /* B2: forw_hor_f_code forw_vert_f_code search_width/height */
1 1 3  3  /* B2: back_hor_f_code back_vert_f_code search_width/height */
mplayer console output is following:
Code:
mplayer out.m2v 
MPlayer SVN-r37379 (C) 2000-2015 MPlayer Team
210 audio & 441 video codecs
do_connect: could not connect to socket
connect: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing out.m2v.
libavformat version 56.25.101 (internal)
MPEG-ES file format detected.
VIDEO:  MPEG2  640x360  (aspect 1)  24.000 fps  5000.0 kbps (625.0 kbyte/s)
Load subtitles in ./
Failed to open VDPAU backend libvdpau_r300.so: cannot open shared object file: No such file or directory
[vdpau] Error when calling vdp_device_create_x11: 1
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 56.26.100 (internal)
Selected video codec: [ffmpeg2] vfm: ffmpeg (FFmpeg MPEG-2)
==========================================================================
Audio: no sound
Starting playback...
The selected video_out device is incompatible with this codec.
Try appending the scale filter to your filter list,
e.g. -vf spp,scale instead of -vf spp.
Movie-Aspect is undefined - no prescaling applied.
VO: [xv] 640x360 => 640x360 Planar YV12 
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
VO: [xv] 640x360 => 640x360 Planar YV12 
V:   0.2   4/  4 ??% ??% ??,?% 0 0 
[VD_FFMPEG] DRI failure.
V:   8.3 200/200  7%  0%  0.0% 0 0 
Exiting... (End of file)
Do anybody knows, what am I doing wrong?

Last edited by EEdcom; 21st November 2015 at 13:19.
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Old 22nd November 2015, 17:17   #2  |  Link
hank315
HCenc author
 
Join Date: Nov 2003
Location: Netherlands
Posts: 570
The result.yuv seems to be OK, plays well in VLC.
The encoded clip (out.m2v) has 200 frames only it is 200 times the same frame: the first frame from result.yuv.
I don't know enough about the used encoder to help you with that.
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Old 22nd November 2015, 19:03   #3  |  Link
EEdcom
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Join Date: Dec 2009
Posts: 5
Quote:
Originally Posted by hank315 View Post
The result.yuv seems to be OK, plays well in VLC.
The encoded clip (out.m2v) has 200 frames only it is 200 times the same frame: the first frame from result.yuv.
I don't know enough about the used encoder to help you with that.
Actually, the problem was with the raw .yuv data file. Old mpeg2-encoder didn't support RAW I420 coded video. I solved the problem by converting video stream into the separate .Y .U .V data files (200 in total).

I am interested to know, if somebody can suggest .yuv video format which is also supported by the old mpeg2-encoder..
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Old 23rd November 2015, 14:50   #4  |  Link
pandy
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Join Date: Mar 2006
Posts: 1,044
Quote:
Originally Posted by EEdcom View Post
I am interested to know, if somebody can suggest .yuv video format which is also supported by the old mpeg2-encoder..
AFAIR - just copy (concatenate) binary Y+U+V - i use this encoder in 2003 or somewhere around 2003.
Planar should work...
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