[MPlayer-users] Reencoding a broadcast HD-ATSC stream
Philip Prindeville
philipp_subx at redfish-solutions.com
Thu Nov 24 02:12:45 CET 2005
Reimar Döffinger wrote:
>Hi,
>On Tue, Nov 22, 2005 at 11:03:14AM +0300, Vladimir Mosgalin wrote:
>
>
>>>>About your problem: don't use bitrate of 20000. If you want to specify
>>>>2 mbit/s, use 2000. If you want to specify 20 mbit/s, use 20000000. Read
>>>>man page for details.
>>>>
>>>>
>>>Well that's perfectly intuitive... ;-)
>>>
>>>
>>Mplayer's authors never supposed that someone will encode at average
>>bitrates higher than 16 mbit/s. You should think twice before doing so,
>>
>>
>
>Well, I'd say if you want to make sure you get good quality you
>shouldn't set a bitrate anyway and instead use e.g. vqscale=2 (or if you
>really need it, vqscale=1). Encoding will be faster, and you won't get
>into trouble if the bitrate allocation algorithm makes stupid decisions.
>Though setting vqmax can help against the latter one, too.
>
>Greetings,
>Reimar Döffinger
>
>
I tried vqscale=2, and got:
-rw-r--r-- 1 root root 6819032976 Nov 12 20:59 IdahoEdens.7.ts
-rw-r--r-- 1 root root 11501367296 Nov 22 22:05 IdahoEdens.avi
So I tried with vqscale=1, and it crapped out:
[root at pvr dvb-misc]# recode /home/share/videos/IdahoEdens.7.ts
pass 1...
mencoder -quiet -sws 2 -oac copy -ovc lavc -lavcopts
vcodec=mpeg4:vqscale=2:vpass=1:aspect=16/9 -vf
pp=hb/vb/dr/al/lb,crop=1920:1080 -tsprog 7 -o
/home/share/videos/IdahoEdens.avi /home/share/videos/IdahoEdens.7.ts
MEncoder dev-CVS-051008-15:57-3.4.4 (C) 2000-2005 MPlayer Team
CPU: Advanced Micro Devices Athlon 64 Clawhammer (Family: 15, Stepping: 10)
Detected cache-line size is 64 bytes
CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE SSE2
success: format: 0 data: 0x0 - 0x96722f90
TS file format detected.
DEMUX OPEN, AUDIO_ID: -1, VIDEO_ID: -1, SUBTITLE_ID: -1,
PROBING UP TO 2000000, PROG: 7
VIDEO MPEG2(pid=113)AUDIO A52(pid=116) NO SUBS (yet)! PROGRAM N. 7
Opened TS demuxer, audio: 2000(pid 116), video: 10000002(pid 113)...POS=564
VIDEO: MPEG2 1920x1088 (aspect 3) 29.970 fps 14490.0 kbps (1811.2
kbyte/s)
[V] filefmt:29 fourcc:0x10000002 size:1920x1088 fps:29.97 ftime:=0.0334
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
AC3: 2.0 (stereo) 48000 Hz 256.0 kbit/s
Using MMX optimized resampler
AUDIO: 48000 Hz, 2 ch, s16le, 256.0 kbit/16.67% (ratio: 32000->192000)
Selected audio codec: [a52] afm:liba52 (AC3-liba52)
==========================================================================
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
Opening video filter: [crop w=1920 h=1080]
Crop: 1920 x 1080, -1 ; -1
Opening video filter: [pp=hb/vb/dr/al/lb]
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 1920 x 1088 (preferred csp: Mpeg PES)
[PP] Using external postprocessing filter, max q = 6.
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
The selected video_out device is incompatible with this codec.
Also try adding the scale filter, e.g. -vf spp,scale instead of -vf spp.
VDecoder init failed :(
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b
Selected video codec: [mpeg12] vfm:libmpeg2 (MPEG-1 or 2 (libmpeg2))
==========================================================================
Building audio filter chain for 48000Hz/2ch/s16le -> 0Hz/0ch/??...
audiocodec: framecopy (format=2000 chans=2 rate=48000 bits=16 B/s=32000
sample-244813135873)
Writing AVI header...
ODML: Aspect information not (yet?) available or unspecified, not
writing vprp header.
VDec: vo config request - 1920 x 1088 (preferred csp: Planar YV12)
[PP] Using external postprocessing filter, max q = 6.
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
videocodec: libavcodec (1920x1080 fourcc=34504d46 [FMP4])
Using constant qscale = 2.000000 (VBR)
ODML: vprp aspect is 16:9.
New_Face failed. Maybe the font path is wrong.
Please supply the text font file (~/.mplayer/subfont.ttf).
subtitle font: load_sub_face failed.
ODML: vprp aspect is 16:9.
ODML: Starting new RIFF chunk at 1023MB.
ODML: Starting new RIFF chunk at 2047MB.
ODML: Starting new RIFF chunk at 3071MB.
ODML: Starting new RIFF chunk at 4095MB.
ODML: Starting new RIFF chunk at 5119MB.
ODML: Starting new RIFF chunk at 6143MB.
ODML: Starting new RIFF chunk at 7167MB.
ODML: Starting new RIFF chunk at 8191MB.
ODML: Starting new RIFF chunk at 9215MB.
ODML: Starting new RIFF chunk at 10239MB.
ODML: Starting new RIFF chunk at 11263MB.
TS_PARSE: COULDN'T SYNC
Flushing video frames
Writing AVI index...
Fixing AVI header...
ODML: vprp aspect is 16:9.
Video stream: 27005.758 kbit/s (3375719 B/s) size: -751021061 bytes
3594.458 secs 107715 frames
Audio stream: 256.000 kbit/s (32000 B/s) size: 115010992 bytes
3594.094 secs
pass 2...
mencoder -quiet -sws 2 -oac copy -ovc lavc -lavcopts
vcodec=mpeg4:vqscale=2:vpass=2:aspect=16/9 -vf
pp=hb/vb/dr/al/lb,crop=1920:1080 -tsprog 7 -o
/home/share/videos/IdahoEdens.avi /home/share/videos/IdahoEdens.7.ts
MEncoder dev-CVS-051008-15:57-3.4.4 (C) 2000-2005 MPlayer Team
CPU: Advanced Micro Devices Athlon 64 Clawhammer (Family: 15, Stepping: 10)
Detected cache-line size is 64 bytes
CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx SSE SSE2
success: format: 0 data: 0x0 - 0x96722f90
TS file format detected.
DEMUX OPEN, AUDIO_ID: -1, VIDEO_ID: -1, SUBTITLE_ID: -1,
PROBING UP TO 2000000, PROG: 7
VIDEO MPEG2(pid=113)AUDIO A52(pid=116) NO SUBS (yet)! PROGRAM N. 7
Opened TS demuxer, audio: 2000(pid 116), video: 10000002(pid 113)...POS=564
VIDEO: MPEG2 1920x1088 (aspect 3) 29.970 fps 14490.0 kbps (1811.2
kbyte/s)
[V] filefmt:29 fourcc:0x10000002 size:1920x1088 fps:29.97 ftime:=0.0334
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
AC3: 2.0 (stereo) 48000 Hz 256.0 kbit/s
Using MMX optimized resampler
AUDIO: 48000 Hz, 2 ch, s16le, 256.0 kbit/16.67% (ratio: 32000->192000)
Selected audio codec: [a52] afm:liba52 (AC3-liba52)
==========================================================================
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
Opening video filter: [crop w=1920 h=1080]
Crop: 1920 x 1080, -1 ; -1
Opening video filter: [pp=hb/vb/dr/al/lb]
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 1920 x 1088 (preferred csp: Mpeg PES)
[PP] Using external postprocessing filter, max q = 6.
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
The selected video_out device is incompatible with this codec.
Also try adding the scale filter, e.g. -vf spp,scale instead of -vf spp.
VDecoder init failed :(
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b
Selected video codec: [mpeg12] vfm:libmpeg2 (MPEG-1 or 2 (libmpeg2))
==========================================================================
Building audio filter chain for 48000Hz/2ch/s16le -> 0Hz/0ch/??...
audiocodec: framecopy (format=2000 chans=2 rate=48000 bits=16 B/s=32000
sample-244813135873)
Writing AVI header...
ODML: Aspect information not (yet?) available or unspecified, not
writing vprp header.
VDec: vo config request - 1920 x 1088 (preferred csp: Planar YV12)
[PP] Using external postprocessing filter, max q = 6.
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
videocodec: libavcodec (1920x1080 fourcc=34504d46 [FMP4])
Using constant qscale = 2.000000 (VBR)
[mpeg4 @ 0xa772f0]requested bitrate is to low
Could not open codec.
FATAL: Cannot initialize video driver.
Exiting...
[root at pvr dvb-misc]#
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