Sony Bravia 2010 shipped profile wrong

With the shipped profile, it tries to do transcode to mpeg2video whereas transcoding to h264 is better because then you can limit the bitrate to a lower value for the same quality. For me, the TV plays the h264 fine.

I had a video made using Canon 70D, which is an AVC at 85Mbps. The transcode was being done to mpeg2 using a rate of 17000kbps and the video was stalling every 2 seconds. It was also resetting my TV on every run, most likely because of too high a rate and something heating up in TV. I changed the targetVCodec to h264 and limited the rate to 4000kbps and the video now plays without any hiccups.

Since the TV is capable of decoding h264, I think this profile should transcode to h264 with about 4Mbps or 5Mbps rate. It will be good to make this change in the shipped profile itself.

This is the only line I changed:

  Code:

<Video targetContainer="mpegts" targetVCodec="h264" maxVBitrate="4000" targetACodec="ac3" aBitrate="384" DAR="16:9" forceInheritance="true">


Thanks much!

[Illico]

That could be an idea, in fact transcoding to h264 is a new feature not available at the creation of sony's profiles, then we could only transcode to mpeg2video.
Do you compare cpu load between mpeg2video & h264 transcoding ?
I don't remember if there were some other profiles that use h264 output for transcoding.
I will check that.

CPU usage was pretty much same on the host because it did not look like its doing 'inline' transcode. It was creating this intermediate STF file in transcoding folder and as far as I could tell, it was doing that "full speed and be done with it" mode i.e. for a 5 minute video, the ffmpeg process disappeared after a minute or so.

Honestly, I do not care about the CPU usage. I have a 4 core i7 920 in that box and it can take quite a bit of beating. So, why bother... I want a smooth quality video on my TV. These settings did just that.

[Illico]

...
Honestly, I do not care about the CPU usage. I have a 4 core i7 920 in that box and it can take quite a bit of beating. So, why bother... I want a smooth quality video on my TV. These settings did just that.

And what about other users ?
They use use some other devices, like NAS.. and did not have such cpu configuration. But if the cpu load is the same btw mpeg2 or h264 transcoding process, why not.
I need more times and test to establish such profile for Sony devices, but you can do it for your personal use.

...
Honestly, I do not care about the CPU usage. I have a 4 core i7 920 in that box and it can take quite a bit of beating. So, why bother... I want a smooth quality video on my TV. These settings did just that.

And what about other users ?
They use use some other devices, like NAS.. and did not have such cpu configuration. But if the cpu load is the same btw mpeg2 or h264 transcoding process, why not.
I need more times and test to establish such profile for Sony devices, but you can do it for your personal use.

I would tend to think that since i7 920 itself is 5 years old, most of your non-NAS users are at that or newer architecture. But sure, there are poorer CPUs out there and people who want to do more with less e.g. typical NAS systems, which are not equiped with online transcoding capable CPUs, they are supposed to just serve the files as is over the network (NAS use case). They will not be able to watch their videos on Bravia 2010 even with mpeg2video transcoding either.

But I respect their position and approach. So, I will continue to maintain that one line change on my end...