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<br><div><div id="SkyDrivePlaceholder"></div>> Date: Sat, 17 Dec 2011 19:47:55 -0800<br>> From: jk90090@gmail.com<br>> To: mythtv-users@mythtv.org<br>> Subject: [mythtv-users] Transcoded recordings playback fails: audio failure, video stutters (was Last MythTV Gentoo ebuild... buffer issues)<br>> <br>> On 12/9/11 12:41 PM, jk90090 wrote:<br>> > On 12/8/11 9:57 PM, Raymond Wagner wrote:<br>> >> On 12/8/2011 23:11, jk90090 wrote:<br>> >>> I've narrowed down my playback issues now to Transcoded recordings. <br>> >>> Any<br>> >>> recording that isn't transcoded is playing back perfectly (720p, 1080i<br>> >>> both smooth as silk), and it's pretty much for all transcoded content,<br>> >>> so simply newly transcoded recordings. Anyone have any ideas?<br>> >> How are you transcoding these?<br>> >> ________________________________<br>> > Ticking the 'transcode' option for the recording schedule, either with <br>> > Medium Quality or Low Quality<br>> ><br>> > The settings I use are: (Advanced -> TV Settings -> Recording <br>> > Profiles -> Transcoders -> ..)<br>> > Media Quality - Resize video while transcoding, 1280x720, MPEG4, <br>> > 2200 Bitrate, Max Qual 2, Min Qual 15, Max qual diff between frames 3, <br>> > Scale bitrate for frame size, Enable High-quality encoding, Enable 4MV <br>> > encoding; MP3 audio, 32000 sampling rate, qual 7, volume 90%<br>> > Low Quality - Resize video while transcoding, 960x540, MPEG4, 2200 <br>> > Bitrate, Max Qual 2, Min Qual 15, Max qual diff between frames 3, <br>> > Scale bitrate for frame size, Enable High-quality encoding, Enable 4MV <br>> > encoding; MP3 audio, 32000 sampling rate, qual 5, volume 90%<br>> ><br>> > As a side likely unrelated note, in the past I usually used High <br>> > Quality (RTjpeg, qual 170; MP3 audio, qual 7), and it worked for years <br>> > until an update in the past 6 months completely broke it, and <br>> > required, oddly, for me to go back into the settings and just hit next <br>> > and finish (effectively re-saving the setting for HQ). It still never <br>> > worked like it had in the past however, and I had started using Medium <br>> > and Low Qual Transcode more often anyways so I didn't look into it <br>> > further.<br>> ><br>> > No difference in playback between the Medium and Low Qual transcoded <br>> > recordings, still stuttering video with audio cutout generally, 720p <br>> > or 1080i. Eventually (seconds) the playback gives up and exits. It <br>> > looks like I had one recent recording that was transcoded with High <br>> > Quality, and it is playing back fine.<br>> ><br>> > I am using a Frontend with VPDAU high quality playback (and I have <br>> > tried without using VPDAU with no different results), and CPU usage <br>> > for the system is single digits generally when doing playback. Dual <br>> > Core i5 I think, 6 GB memory.<br>> ><br>> ><br>> So I never could figure out how to rollback to the earlier build, and <br>> frankly it would probably be more of a pain than to just have someone <br>> figure out what is now broken in Myth. I went ahead and built the <br>> latest ebuild from github ( using scripts/mythtv-buildebuild.py ):<br>> <br>> [ebuild R ~] media-tv/mythtv-0.25_pre20111217 USE="alsa autostart <br>> dvb dvd ieee1394 lame lcd lirc vdpau x264 xvid (-altivec) -bluray <br>> -crystalhd -debug -jack -perl -pulseaudio -python -vaapi" <br>> INPUT_DEVICES="-joystick" VIDEO_CARDS="nvidia" 0 kB [1]<br>> <br>> No change to my woes. Next I tried using mythcommflag to rebuild the <br>> seek tables, just to rule it out. No change.<br>> I have yet to find a single transcoded recording that plays back anymore.<br>> <br>> I switched audio to NULL and no change, so I can't quite see it as a AV <br>> sync issue. Ideas anyone? This is driving me crazy.<br>> <br>> -J<br>> _______________________________________________<br>> mythtv-users mailing list<br>> mythtv-users@mythtv.org<br>> http://www.mythtv.org/mailman/listinfo/mythtv-users<br><br>I think I am facing the same problem. I am using HEAD and the mythnuv2mkv.sh script to transcode recordings. Things started breaking about 2 months ago, but I didn't realize it on time because I wasn't watching the recordings.<br><br>The symptom is like missing frames, and it occurs in both .nuv and .mpg recordings. I intend to find some time and experiment more with the transcoding settings (not of mythnuv2mkv.sh, of mythtranscode) because I seem to remember that trying one of the default-high-low quality setting didn't corrupt the file. Unfortunately, I didn't keep the original. So I must be more thorough in my search. Don't worry, you're not alone.<br><br>Regards, <br><br>Yianni<br></div> </div></body>
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