Native format passthrough (BD M2TS, DTS-MA/TrueHD)

**l8router** · 10-13-2011, 09:50 AM

Hi,

Last night I tried to watch an M2TS file which I remux'd from an actual BD iso. See below picture for more info on the media file (strictly BD remuxing no transcoding involved.)

Attachment 158

The pleasure was thoroughly denied when I tried to play this from Mezzmo on my Sony BDV-E970W, observed:
1. 30 seconds into the video it began stuttering every 2-3 sceonds
2. Disruptively timed out one minute into the playback
3. FFmpeg CPU usage stayed at >90%
4. Transcoding kicked in as I could see filenames with "trancoding" string in the filenames actively being generated/updated in the transcoding directory.

I had to burn it onto a BD RE 50 to watch it natively on the Blu-ray HT device (BDV-E970W).

Makes me wonder:

How do I modify the device profiles so that BD M2TS container gets passed through to the BDV "as is", preserving all of the three mandatory BD video formats (MPEG-2, H2.64/MPEG4-AVC, and VC-1) as well as audio formats all the way up to TrueHD and DTS-HD/MA/HRA?

**Paul** · 10-13-2011, 09:56 AM

Hi,

Can you please right-click on that file in Mezzmo and post the output of the "Get FFmpeg Information" command, so that I could see what the file actually is (the screenshot is too small to read and also won't tell me how Mezzmo sees it).

Which device profile are you using for your device?

**l8router** · 10-13-2011, 10:00 AM

I'm on 2.4.4.0 (registered) with original 32-bit FFmpeg

Device profile is: Sony BDP (PAL)

Get FFmpeg info:

ffmpeg version N-33093-gb4483a5, Copyright (c) 2000-2011 the FFmpeg developers
built on Sep 29 2011 14:54:32 with gcc 4.4.2
[mpegts @ 01408460] max_analyze_duration 5000000 reached at 5000000
[NULL @ 01536b60] start time is not set in estimate_timings_from_pts
Input #0, mpegts, from '\\10.21.21.21\Media\\Movies\HD\Black Hawk Down [2001].m2ts':
Duration: 02:23:26.07, start: 600.000000, bitrate: 30442 kb/s
Program 1
Stream #0:0[0x1011]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 38000 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
Stream #0:1[0x1100](eng): Audio: truehd (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), s32
Stream #0:2[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), s16, 640 kb/s
Stream #0:3[0x1200](eng): Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
At least one output file must be specified

---> DB Level Info: 4, 4
---> Frame rate: 23.98
---> Aspect ratio: 16:9

**l8router** · 10-13-2011, 10:02 AM

Yeah the forum software somehow tried to convert my picture to a tiny jpg.

Here's how MediaInfo sees the file:

http://imgur.com/EV5ZZ

**Paul** · 10-13-2011, 10:05 AM

That file is converted because of the "truehd" audio track.

If you turn transcoding off, does the file play natively? If it does, we'll modify the device profile to pass it through.

**l8router** · 10-13-2011, 10:09 AM

I turned transcoding off last night and the file disappeared from the screen.

I burnt the file to onto a BD RE 50 and inserted into the tray on the BDV and it played natively, thus the device was able to play it natively.

**Paul** · 10-13-2011, 10:12 AM

Playing a file from disk or a USB is not the same as through the DLNA, so if it plays from disk/USB, it doesn't mean that it'll be successfully streamed.

I can tell you how to modify the device profile to try and get this file to play through natively, if you are comfortable with editing text files or, alternatively, please open a support ticket and I'll send you a device profile to try.

**l8router** · 10-13-2011, 10:26 AM

Hi Dennis,

I agree with you in principle, however in this particular case I tend to believe all the formats in question are totally native to the device and thus should be playable over DLNA, remuxed or not.

I'm happy go through this with you on the forum to share the info and findings with a lot of users who have Sony BDV class devices. If successful we'll be able to enjoy streamed native M2TS, and for the first time, DTS-*/TrueHD over network via Mezzmo.

I now have the prf files in front of me, ready to go.

**Paul** · 10-13-2011, 10:38 AM

Particular format implementations are up to the device's firmware developers, so it may or may not be supported, based on what they deemed practical to implement over DLNA.

In any case, let's give it a try.

If you have the device profile open in Notepad, please change:

Code:

        <avcontainer id="mpegts" name="mpegts_transcoding" encode="1" format="mpegts" mimetype="video/vnd.dlna.mpeg-tts" dlnaprofile="MPEG_TS_SD_EU" supportschunked="0" preferredtranscoded="1">
        	<video>
        		<format id="mpeg1video" encode="0">
        		</format>
        	</video>
        	<video>
                        <format id="mpeg2video" encode="0" codec="mpeg2video">
                        </format>
		</video>
		<video>
			<format id="h264" encode="1" codec="libx264" preferredtranscoded="1">
				<copyts>0</copyts>
				<samequality>0</samequality>
			</format>
		</video>
		<audio>
			<format id="ac3" encode="1" codec="ac3" preferredtranscoded="1">
				<channels>2</channels>
				<channels>6</channels>
				<bitrate>640000</bitrate>
				<maxbitrate>640000</maxbitrate>
				<minbitrate>64000</minbitrate>
				<samplingrate>48000</samplingrate>
			</format>
		</audio>
		<audio>
			<format id="aac" encode="1" codec="aac">
				<channels>2</channels>
				<channels>6</channels>
				<bitrate>320000</bitrate>
				<samplingrate>44100</samplingrate>
			</format>
		</audio>
        	<audio>
        		<format id="mp3" encode="0">
        		</format>
        	</audio>
        	<audio>
        		<format id="mp2" encode="0">
        		</format>
        	</audio>
                <ffmpegadditional>-threads 0 -pix_fmt yuv420p -copyinkf -coder 1 -flags +loop -cmp +chroma -me_method hex -subq 7 -me_range 16 -g 25 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -b_strategy 1 -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -directpred 1 -flags2 +fastpskip+bpyramid+mixed_refs-dct8x8+wpred+aud+ivlc+mbtree -partitions -parti8x8-parti4x4-partp8x8-partp4x4-partb8x8 -crf 22 -bf 1 -refs 2 -bidir_refine 1 -deblockalpha 0 -deblockbeta 0 -bsf h264_mp4toannexb -strict experimental</ffmpegadditional>
        </avcontainer>

to:

Code:

        <avcontainer id="mpegts" name="mpegts_transcoding" encode="1" format="mpegts" mimetype="video/vnd.dlna.mpeg-tts" dlnaprofile="MPEG_TS_SD_EU" supportschunked="0" preferredtranscoded="1">
        	<video>
        		<format id="mpeg1video" encode="0">
        		</format>
        	</video>
        	<video>
                        <format id="mpeg2video" encode="0" codec="mpeg2video">
                        </format>
		</video>
		<video>
			<format id="h264" encode="1" codec="libx264" preferredtranscoded="1">
				<copyts>0</copyts>
				<samequality>0</samequality>
			</format>
		</video>
		<audio>
			<format id="ac3" encode="1" codec="ac3" preferredtranscoded="1">
				<channels>2</channels>
				<channels>6</channels>
				<bitrate>640000</bitrate>
				<maxbitrate>640000</maxbitrate>
				<minbitrate>64000</minbitrate>
				<samplingrate>48000</samplingrate>
			</format>
		</audio>
		<audio>
			<format id="aac" encode="1" codec="aac">
				<channels>2</channels>
				<channels>6</channels>
				<bitrate>320000</bitrate>
				<samplingrate>44100</samplingrate>
			</format>
		</audio>
        	<audio>
        		<format id="truehd" encode="0">
        		</format>
        	</audio>
        	<audio>
        		<format id="mp3" encode="0">
        		</format>
        	</audio>
        	<audio>
        		<format id="mp2" encode="0">
        		</format>
        	</audio>
                <ffmpegadditional>-threads 0 -pix_fmt yuv420p -copyinkf -coder 1 -flags +loop -cmp +chroma -me_method hex -subq 7 -me_range 16 -g 25 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -b_strategy 1 -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -directpred 1 -flags2 +fastpskip+bpyramid+mixed_refs-dct8x8+wpred+aud+ivlc+mbtree -partitions -parti8x8-parti4x4-partp8x8-partp4x4-partb8x8 -crf 22 -bf 1 -refs 2 -bidir_refine 1 -deblockalpha 0 -deblockbeta 0 -bsf h264_mp4toannexb -strict experimental</ffmpegadditional>
        </avcontainer>

Then save the file, restart the server and it should now stream that file through natively.

Please let me know how that goes.

**l8router** · 10-13-2011, 11:11 AM

Thanks Dennis. I made the above changes to the .prf file. Will post feedback when I get home and test it around 5pm today Melbourne time.

In the meanwhile I'm studying a bunch of .prf files to see if there's anything I can adapt to enhance the profile. Is there any documentation available on editing .prf files?

Thanks.