Problem with HD recordings from Myth HVR2250

[dallasmn]

<pre>
I have been using SVCD2DVD for a long time with myth recordings using PVR150 etc devices in analog mode, very successfully.

I have now built a machine with mythbuntu 9.1 using a Haupaugge HVR2250. I have been using mythtranscode to cut the commercials and then ffmpeg to take the HD stream and generate a SD formatted file (720x404 padded to be either 720x408 or 720x480). When I load the files into SVCD2DVD and try to play them I get a scrambled image displayed, or sometimes a green screen. I have not been able to find anything I can do to correct the problem.

When I play the dvd in a mechanical player I get an odd error where the encoding randomly fails at the edges and appear to &quot;tear&quot; from the edge toward the center in waves of color distortion. It happens with the 2 pixel border padding, the full padding, and no padding. When I play any of the files in MYTH, VLC or GOM Player they play fine, as do the DVD's. Quicktime player and MPEG Streamclip will not play the video at all, simply black screen. Media Player Classic seemed to have some difficulties at times, but usually plays the files.

I have also tried using ProjectX to convert from TS to PS (using toM2P). I have not had much success using demux followed by mplex muxing. Mplex usually fails, or I cannot get ProjectX to create both the m2v and ac3 files at the same time. So the files do have issues that I need to correct as well. Hopefully the reencoding with ffmpeg resolves the issues, and the problems in SVCD2DVD and the players can be also.


Example of ffmpeg -i information for the re-encoded 16x9 case is:

Seems stream 0 codec frame rate differs from container frame rate: 59.94 (60000/1001) -> 29.97 (30000/1001)
Input #0, mpeg, from '2041_20090929210000[mpeg-2].m2p_3300k_yuv420p.mpg':
Duration: 00:59:56.02, start: 0.500000, bitrate: 3542 kb/s
Stream #0.0[0x1e0]: Video: mpeg2video, yuv420p, 720x408 [PAR 136:135 DAR 16:9], 8000 kb/s, 29.97 tbr, 90k tbn, 59.94 tbc
Stream #0.1[0x1c0]: Audio: mp2, 48000 Hz, 2 channels, s16, 224 kb/s
At least one output file must be specified


For a different recorded file (sorry), the recoding setup as described in the information of ProjectX are as:

-> Input File 0: '/Volumes/Data_1/test/untitled folder/2111_20100201190000.mpg.bkp.mpg' (5,887,825,924 bytes)
-> Filetype is TS (generic PES Container)
-> demux
-> Service ID 0x1
-> PMT 0x3ED refers to these usable streams:
Video:
PID: 0x3EE
Audio:
PID: 0x3EF(AC-3)(eng)[PD]
Teletext:
n/a
Subpict.:
n/a

!> PID 0x0 (PAT) (0 #1) -> ignored
!> PID 0x3ED (PMT) (188 #2) -> ignored
ok> PID 0x3EF has PES-ID 0xBD (private stream 1) (752 #5)
ok> PID 0x3EE has PES-ID 0xE0 (MPEG Video) (1504 #9)
-> video basics: 1920*1080 @ 29.97fps @ 0.7031 (16:9) @ 20000000bps, vbvBuffer 488
-> starting export of video data @ GOP# 0
!> dropping useless B-Frames @ GOP# 0 / new Timecode 00:00:00.000
packs: 27806 0% 5242944

-> Video: fr/ ct/ 1p/ cg/ og/ dg -> 62/ 1/ 0/ 5/ 0/ 0
-> Video length: 62 frames @ 00:00:02.060
-> GOP summary: min. 26, max. 30 fields; contains interlaced frames
-> avg. nom. bitrate 14323880bps (min/max: 7288000/90885200)
-> set first sequenceheader bitrate to 9000000bps
---> new File: /Volumes/Data_1/test/untitled folder/2111_20100201190000.mpg.bkp.mpv

--> AC-3/DTS Audio on PID 0x3EF
-> Audio: use only first PTS for sync
-> Audio: limit points of PTS for sync
-> check CRC of AC-3 / MPEG-Audio L1,2
-> delete CRC in MPEG-Audio Layer1,2
-> fill gaps with prev. frame
-> add frames
-> take only first Audio PTS (to sync the starttime)
Audio PTS: first packet 03:38:52.490, last packet 03:38:52.490
Video PTS: start 1.GOP 03:38:53.407, end last GOP 03:38:55.475
!> 1st video PTS starts later than the last PTS of this stream! critical for Sync
-> adjusting audio at video-timeline
-> src_audio: AC-3, CM, 3/2lfe(5.1), dn -27dB, cm -3.0dB, sm -3dB, 48000Hz, 384kbps @ 00:00:00.000
audio frames: wri/pre/skip/ins/add 64/0/0/0/0 @ 00:00:02.048 done...
---> new File: '/Volumes/Data_1/test/untitled folder/2111_20100201190000.mpg.bkp.ac3'

summary of created media files:
.Video (m2v): 62 Frames 00:00:02.060 '/Volumes/Data_1/test/untitled folder/2111_20100201190000.mpg.bkp.mpv'
Audio 0 (ac3): 64 Frames 00:00:02.048 0/0/0/0 '/Volumes/Data_1/test/untitled folder/2111_20100201190000.mpg.bkp.ac3'
=> 3,801,027 bytes written...
</pre>

[dallasmn]

I guess I should rephrase the questions: 1) Is there a particular format for the MPEG2 file I should be submitting to SVCD2DVD? 2) Is there something known that should be done to convert a digital recording (MPEG-TS, ASTC) to make them compatible with SVCD2DVD?

[ChrissyBoy]

Have you tried the original file in SVCD2DVD without preprocessing it?

[dallasmn]

I tried one of the files that I had removed commercials from (so it was 43 minutes). It was 4.144 GB in size. The S2D file was 2.335 GB. It was viewable/playable in SVCD2DVD, and the resulting DVD was playable on my set-top players. So clearly something I am doing to convert them to SD file is incorrect. I want to be able to put 4 TV shows on one DVD, as I have in the past with SD recordings, they end up about 43 minutes each), as well as syncing the timestamps. Do you have any recommendations that you might have tried?