dlflannery
October 7th, 2006, 08:15 PM
In a ***previous post*** (http://www.videoredo.net/msgBoard/showpost.php?p=21647&postcount=1) I gave test results of using Roxio EMC9 (MyDVD9) to author TiVo Medium Quality files to DVD. In that post I mentioned another authoring process as follows:
I have another process that produces DVD's without re-encoding medium TiVo files. It uses VideoReDo, saving to elementary streams (separate video and audio), then transcoding the audio from mpeg to Dolby AC3 (needed for true DVD compliance, and performed by MyDVD) using gui4ffmpeg, then authoring to .iso with DVDStyler. I can pack over 3 hours of TiVo medium video on a DVD with this but I don't know if the overall authoring time is much less than MyDVD when it re-encodes to LP quality (don't have timings yet).
I just used the process quoted above to put 3 hours (four titles) of edited medium quality TiVo (352x480 or half-D1) on a DVD that plays perfectly in my standalone player and the player software that came with my 2 year old Dell laptop.
Timings:
1. Transcode audio from mpeg to ac3: 14 minutes
2. Author to .iso file (DVDStyler): 32 minutes
This total of 46 minutes is 15.3 minutes per hour of video and can be compared to MyDVD9 which takes about 30 minutes per hour of video. However the MyDVD result runs at 4 Mbps while the DVDStyler result runs at exactly what the original TiVo medium recording did, i.e., around 2.7 Mbps. The higher bit rate in theory produces better video quality but there also is a degradation anytime you re-encode as MyDVD is doing. I don't discern any quality difference on my viewing devices. The other difference is you couldn't put 3 hours on the DVD with the MyDVD method since it needs 1.95 GB/hr plus menu space.
If you don't want to edit, MyDVD gains another advantage since you can input TiVo files directly. With my method you would still have to load the TiVo file into VRD and save it as elementary streams, which adds about 3 min/hr.
My method requires dealing with two programs instead of one and gui4ffmpeg must be run once for each title's audio. However simple batch files can run it on any number of titles at one sitting while you do something else. You just type the titles on a line in a batch file and run it.
If you skip the audio transcode (just input the edited mpeg from VRD into DVDStyler) it gets even faster. Some standalone players, including mine, don't need the audio in ac3 form. I'm doing it this way to increase the chances it will play on a couple of my friends players.
I have another process that produces DVD's without re-encoding medium TiVo files. It uses VideoReDo, saving to elementary streams (separate video and audio), then transcoding the audio from mpeg to Dolby AC3 (needed for true DVD compliance, and performed by MyDVD) using gui4ffmpeg, then authoring to .iso with DVDStyler. I can pack over 3 hours of TiVo medium video on a DVD with this but I don't know if the overall authoring time is much less than MyDVD when it re-encodes to LP quality (don't have timings yet).
I just used the process quoted above to put 3 hours (four titles) of edited medium quality TiVo (352x480 or half-D1) on a DVD that plays perfectly in my standalone player and the player software that came with my 2 year old Dell laptop.
Timings:
1. Transcode audio from mpeg to ac3: 14 minutes
2. Author to .iso file (DVDStyler): 32 minutes
This total of 46 minutes is 15.3 minutes per hour of video and can be compared to MyDVD9 which takes about 30 minutes per hour of video. However the MyDVD result runs at 4 Mbps while the DVDStyler result runs at exactly what the original TiVo medium recording did, i.e., around 2.7 Mbps. The higher bit rate in theory produces better video quality but there also is a degradation anytime you re-encode as MyDVD is doing. I don't discern any quality difference on my viewing devices. The other difference is you couldn't put 3 hours on the DVD with the MyDVD method since it needs 1.95 GB/hr plus menu space.
If you don't want to edit, MyDVD gains another advantage since you can input TiVo files directly. With my method you would still have to load the TiVo file into VRD and save it as elementary streams, which adds about 3 min/hr.
My method requires dealing with two programs instead of one and gui4ffmpeg must be run once for each title's audio. However simple batch files can run it on any number of titles at one sitting while you do something else. You just type the titles on a line in a batch file and run it.
If you skip the audio transcode (just input the edited mpeg from VRD into DVDStyler) it gets even faster. Some standalone players, including mine, don't need the audio in ac3 form. I'm doing it this way to increase the chances it will play on a couple of my friends players.