[Cin] New thread on bdwrite + mpeg2 HDV video

Andrew Randrianasulu randrianasulu at gmail.com
Mon Nov 7 19:31:56 CET 2022 

пн, 7 нояб. 2022 г., 21:27 Terje J. Hanssen <terjejhanssen at gmail.com>:

>
>
> Den 07.11.2022 18:58, skrev Andrew Randrianasulu:
>
>
>
> пн, 7 нояб. 2022 г., 20:50 Andrew Randrianasulu <randrianasulu at gmail.com>:
>
>>
>>
>> пн, 7 нояб. 2022 г., 20:30 Andrew Randrianasulu <randrianasulu at gmail.com
>> >:
>>
>>>
>>>
>>> пн, 7 нояб. 2022 г., 19:40 Andrew Randrianasulu <randrianasulu at gmail.com
>>> >:
>>>
>>>>
>>>>
>>>> пн, 7 нояб. 2022 г., 19:10 Andrew Randrianasulu <
>>>> randrianasulu at gmail.com>:
>>>>
>>>>> Because old thread  now a bit too big for mobile gmail  client.
>>>>>
>>>>
> Yes, I also discovered that and thougt we should continue on another thread
> (though Thunderbird/IMAP on my Ultrabook had no problems)
>
>
>
>>>>> Yes, I'll try to see if it fails same way on my end.
>>>>>
>>>>> code seems to check first 100 frames
>>>>>
>>>>>
>>>>> 2528 static int field_probe(AVFormatContext *fmt_ctx, AVStream *st)
>>>>> 2529 {
>>>>> 2530   AVDictionary *copts = 0;
>>>>> 2531   //av_dict_copy(&copts, opts, 0);
>>>>> 2532   AVCodecID codec_id = st->codecpar->codec_id;
>>>>> 2533 #if LIBAVCODEC_VERSION_INT <= AV_VERSION_INT(58,134,100)
>>>>> 2534   AVCodec *decoder = avcodec_find_decoder(codec_id);
>>>>> 2535 #endif
>>>>> 2536 #if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(59,16,100)
>>>>> 2537   const AVCodec *decoder = avcodec_find_decoder(codec_id);
>>>>> 2538 #endif
>>>>> 2539   AVCodecContext *ctx = avcodec_alloc_context3(decoder);
>>>>> 2540   if( !ctx ) {
>>>>> 2541     fprintf(stderr,"codec alloc failed\n");
>>>>> 2542     return -1;
>>>>> 2543   }
>>>>> 2544   avcodec_parameters_to_context(ctx, st->codecpar);
>>>>> 2545   if( avcodec_open2(ctx, decoder, &copts) < 0 ) {
>>>>> 2546     fprintf(stderr,"codec open failed\n");
>>>>> 2547     return -1;
>>>>> 2548   }
>>>>> 2549   av_dict_free(&copts);
>>>>> 2550
>>>>> 2551   AVFrame *ipic = av_frame_alloc();
>>>>> 2552   AVPacket ipkt;
>>>>> 2553   av_init_packet(&ipkt);
>>>>> 2554   int ilaced = -1;
>>>>> 2555   for( int retrys=100; --retrys>=0 && ilaced<0; ) {
>>>>> 2556     av_packet_unref(&ipkt);
>>>>> 2557     int ret = av_read_frame(fmt_ctx, &ipkt);
>>>>> 2558     if( ret == AVERROR_EOF ) break;
>>>>> 2559     if( ret != 0 ) continue;
>>>>> 2560     if( ipkt.stream_index != st->index ) continue;
>>>>> 2561     if( !ipkt.data || !ipkt.size ) continue;
>>>>> 2562     ret = avcodec_send_packet(ctx, &ipkt);
>>>>> 2563     if( ret < 0 ) {
>>>>> 2564       fprintf(stderr, "avcodec_send_packet failed\n");
>>>>> 2565       break;
>>>>> 2566     }
>>>>> 2567     ret = avcodec_receive_frame(ctx, ipic);
>>>>> 2568     if( ret >= 0 ) {
>>>>> 2569       ilaced = ipic->interlaced_frame ? 1 : 0;
>>>>> 2570       break;
>>>>> 2571     }
>>>>> 2572     if( ret != AVERROR(EAGAIN) )
>>>>> 2573       fprintf(stderr, "avcodec_receive_frame failed %d\n", ret);
>>>>> 2574   }
>>>>> 2575   av_packet_unref(&ipkt);
>>>>> 2576   av_frame_free(&ipic);
>>>>> 2577   avcodec_free_context(&ctx);
>>>>> 2578   return ilaced;
>>>>>
>>>>> may be we can add flags to force interlaced vs progressive to bdwrite
>>>>> ... and/or debug why it fails.
>>>>>
>>>>>
>>>> sorry, not m2t or m2ts files were found on my main harddrive, so blind
>>>> shot!
>>>>
>>>> Terje, can you recompile bdwrite with attached patch and see if it
>>>> improves situation?
>>>>
>>>
> I hope to avoid recompiling my ultrabook, where I just have installed the
> CinGG appimage
>
>
>
>>>
>>> err, I think second patch also needed, because ilace in bdwrite is just
>>> 1/0/-1 not more detailed.
>>>
>>
>>
>>
>> finally found m2t file, for me bdwrite does not complain but resulting
>> file is unplayable
>>
>
> Note:
> I just used the short m2t file you linked to; maybe it is to short for
> interlace probe?
>


may be! try to cp it under few different names then cat them together to
get longer file?



>
> this one contain real very short hdv sample with mp2 sound
> http://twenkid.com/os/3.m2t
>
>
>
>>
>> note I used -b switch for new mkudffs so it works with 2048 blocks and
>> not default 512
>>
>
> I used the plain manual step 3 without -b, as also used for 2048 blocks in
> the sample step 2 ?
> I 'll do a new attempt with -b and reort the result
>
>
>
>> root at slax:/tmp# mkudffs -b 2048 /tmp/newfilename.udfs 25915
>>  filename=/tmp/newfilename.udfs
>> label=LinuxUDF
>> uuid=6369651cdf849fbf
>> blocksize=2048
>> blocks=25915
>> udfrev=2.01
>> start=0, blocks=16, type=ERASE
>> start=16, blocks=4, type=VRS
>> start=20, blocks=76, type=ERASE
>> start=96, blocks=16, type=MVDS
>> start=112, blocks=16, type=ERASE                              start=128,
>> blocks=4, type=LVID                                start=132, blocks=124,
>> type=ERASE                        start=256, blocks=1, type=ANCHOR
>>
>> start=257, blocks=25400, type=PSPACE      start=25657, blocks=1,
>> type=ERASE
>> start=25658, blocks=1, type=ANCHOR
>> start=25659, blocks=69, type=ERASE
>>  start=25728, blocks=16, type=RVDS
>>  start=25744, blocks=170, type=ERASE
>> start=25914, blocks=1, type=ANCHOR
>> root at slax:/tmp# mount -o loop /tmp/newfilename.udfs /mnt/test
>>
>> root at slax:/tmp# bdwrite /mnt/test /home/guest/20081103140154.m2t
>>
>> root at slax:/tmp# umount /mnt/test
>>
>>
>>
>> playing result in many
>>
>> root at slax:/tmp# mplayer -vo null br://tmp/newfilename.udfs
>>   MPlayer UNKNOWN-11.2.0 (C) 2000-2022 MPlayer Team
>>  do_connect: could not connect to socket                         connect:
>> No such file or directory
>>  Failed to open LIRC support. You will not be able to use your remote
>> control.
>>
>>  Playing br://tmp/newfilename.udfs.                                     The
>> hostname option must be an integer: tmp              Struct bluray, field
>> hostname parsing error: tmp             libavformat version 59.33.100
>> (internal)                           bluray.c:707: Skipping broken unit at
>> 0                              bluray.c:255: 00000.m2ts: no timestamp for
>> SPN 0 (got 0). clip 46909800-47511000.
>>  bluray.c:707: Skipping broken unit at 0
>> bluray.c:707: Skipping broken unit at 6144
>> bluray.c:255: 00000.m2ts: no timestamp for SPN 0 (got 0). clip
>> 46909800-47511000.                                       bluray.c:707:
>> Skipping broken unit at 0                               bluray.c:707:
>> Skipping broken unit at 6144                     bluray.c:707: Skipping
>> broken unit at 12288                    bluray.c:707: Skipping broken unit
>> at 18432                    bluray.c:707: Skipping broken unit at 24576
>>
>> {and so on}
>>
>
>
> on the other hand reencoding audio like this
>
> root at slax:/tmp# ffmpeg -i /home/guest/20081103140154.m2t -c:v copy -c:a
> ac3 -b:a 384k 2008.m2ts
>
> and repeating steps with mkudffs / mount /bdwrite /umount resulted in
> working in mplayer file!
>
> I have 'old' 4.4 ffmpeg, so no bluray encoding for me.
>
> also, I used wcalc as console calc
>
>
>
>
>
>>
>>
>>>>
>>>>
>>>>>
>
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